centrifuges & separation equipment

centrifuges & separation equipment

Only efficient handling of valuable resources will ensure our quality of life without endangering the fundamental basis of future generations. Healthy growth this is the objective of GEA's separation technology.

With our pioneering work in designing centrifuges and production processes, we enabled the industry-scale production for dairy products like strained yoghurt, quark and fresh cheese. Our centrifuges ensure economical and efficient production and the achievement of a product with a consistent taste and texture.

Decanter centrifuges are the heart of every wet separation process line to obtain plant proteins for the use as e.g. meat alternatives or sport drinks and snack bars. Learn more about the design features decanters should optimally have for the recovery of plant proteins.

With the Crude Oil Treatment System, GEA has designed a flexible but easy-to-integrate solution for the continuous dehydration and desalting of crude oil in various process setups in upstream and downstream processes. Try our online calculator to get an initial indication of possible installation options based on your individual feed and process conditions.

Designed to regulate different separator processes automatically, the GEA marine Upgrade Kit comprises additional software and a sophisticated easy-to-install hardware kit. Adding considerably to the functionality of our marine separators, it makes them more efficient and environmentally friendly.

Our supplier-independent platform gives you 24/7/365 access to state-of-the art services such as remote maintenance, data analytics, and comprehensive e-commerce, and enables seamless integration of all interactions with suppliers in a common platform.

As a more environmentally friendly alternative to existing production processes for food supplies for animals, GEA has been working with an Australian start-up to explore the potential of sustainable protein for animal feed

GEA is one of the worlds largest systems suppliers for the food, beverage and pharmaceutical sectors. The international industrial technology group specializes in machinery and plants as well as advanced process technology, components and comprehensive services. With more than 18,000 employees, the group generated revenue of more than EUR 4.6 billion in fiscal year 2020. A major focus is on continuously enhancing the sustainability and efficiency of customers production processes. GEA plants, processes and components help achieve significant reductions in carbon emissions, plastic use and food waste in production worldwide. In this way, GEA makes a decisive contribution toward a sustainable future, fully in line with its corporate philosophy of engineering for a better world.

aseptomag magnetic separator portfolio - gea video portal

aseptomag magnetic separator portfolio - gea video portal

Magnetic Separators serve as protection for process equipment and at the same time increase food quality. The Aseptomag Portfolio includes three different models to ideally match customer expectations. Aseptomag Magnetic Separators - taste the difference

GEA is one of the largest technology suppliers for food processing and a wide range of other industries. The global group specializes in machinery, plants, as well as process technology and components.

GEA is one of the largest technology suppliers for food processing and a wide range of other industries. The global group specializes in machinery, plants, as well as process technology and components.

aseptic valves & components | gea pumps & valves

aseptic valves & components | gea pumps & valves

The three valve lines distinguish themselves via the hermetic sealing concept. The Aseptomag valve line is based on stainless steel bellows technology, whereas the D-tec valve line uses stem diaphragm technology to hermetically seal the sterile process pipe against the atmosphere. Both valve lines are mainly used for dairy, beverage and food applications. The VESTA valve line bases on PTFE bellows technology and is a true asset for applications in the pharmaceutical, biotech and cosmetics industry. For more information about the three valve lines please refer to the product pages.

GEA is one of the worlds largest systems suppliers for the food, beverage and pharmaceutical sectors. The international industrial technology group specializes in machinery and plants as well as advanced process technology, components and comprehensive services. With more than 18,000 employees, the group generated revenue of more than EUR 4.6 billion in fiscal year 2020. A major focus is on continuously enhancing the sustainability and efficiency of customers production processes. GEA plants, processes and components help achieve significant reductions in carbon emissions, plastic use and food waste in production worldwide. In this way, GEA makes a decisive contribution toward a sustainable future, fully in line with its corporate philosophy of engineering for a better world.

magnetic separators aseptomag mas b

magnetic separators aseptomag mas b

Housing Housings for magnetic separators are available with two ports executed with standard butt-weld connections by default. Other pipe connections are available upon request. The housing is identical for all three types (MAS B, MAS H & MAS PA) and includes an orientation point to enable ideal flow conditions inside the housing due to ideal positioning of the magnetic rods.

Magnetic Unit The magnetic unit of the type MAS B is the base model. It contains 7 rods filled with multiple equally strong permanent magnets to create a consistent magnetic field inside the housing. The foreign particles remain at the rods and can therefore no longer harm components and machines. The cleaning of the rods is done manually and outside the process (cleaning out of place). The permanent magnets remain inside the rods at all times, so in order to clean to rods the magnetic force must be overcome.

Clamp Due to its solid construction, the GEA Aseptomag clamp enables a pressure stable and safe connection of the main components. The special design with three segments allows a service-friendly handling of the component, even under tight space conditions.

Magnetic Separators primary serve as protection of processing plants from foreign steel and other magnetic particles and consequently have a wide range of applications. The origin of foreign magnetic particles in a process varies. Typical sources are ferric products such as cacao or debris in raw materials such as fruits and vegetables.

Magnetic separators of the type MAS H enable simplified cleaning of the magnetic rods by deactivating the magnetic field via a hand lever. The innovative locking device minimizes the risks of mis-manipulation during cleaning operations.

Magnetic separators of the type MAS PA are suitable for cleaning in place processes. The magnetic field can be deactivated via a pneumatic actuator which enables our customers to run the magnetic separator in a fully automated process.

GEA is one of the worlds largest systems suppliers for the food, beverage and pharmaceutical sectors. The international industrial technology group specializes in machinery and plants as well as advanced process technology, components and comprehensive services. With more than 18,000 employees, the group generated revenue of more than EUR 4.6 billion in fiscal year 2020. A major focus is on continuously enhancing the sustainability and efficiency of customers production processes. GEA plants, processes and components help achieve significant reductions in carbon emissions, plastic use and food waste in production worldwide. In this way, GEA makes a decisive contribution toward a sustainable future, fully in line with its corporate philosophy of engineering for a better world.

gea engineering for a better world

gea engineering for a better world

GEA is one of the worlds largest systems suppliers for the food, beverage and pharmaceutical sectors. The international industrial technology group specializes in machinery and plants as well as advanced process technology, components and comprehensive services. With more than 18,000 employees, the group generated revenue of more than EUR 4.6 billion in fiscal year 2020. A major focus is on continuously enhancing the sustainability and efficiency of customers production processes. GEA plants, processes and components help achieve significant reductions in carbon emissions, plastic use and food waste in production worldwide. In this way, GEA makes a decisive contribution toward a sustainable future, fully in line with its corporate philosophy of engineering for a better world.

reliably removing foreign particles from products and processes: gea extends aseptomag magnetic separator portfolio

reliably removing foreign particles from products and processes: gea extends aseptomag magnetic separator portfolio

With its Aseptomag magnetic separator portfolio, GEA supports its customers in the food, pharmaceutical and chemical industries in achieving three goals: improving product quality, preventing plant from damage and increasing plant availability.

Plant engineers and food producers from a wide range of applications are only too familiar with this problem: foreign magnetic particles in the production process. Typical sources of these are, for example, ferric products such as cocoa or debris in raw materials such as fruits and vegetables. For instance, the market offers chocolate with up to 3 milligrams of iron per 100 grams - especially dark chocolate. Metallic residues at fruits and vegetables are often caused by abrasions from steel tools used during harvest or by steel components on packaging, such as metallic retaining clips.

Magnetic separators prevent downstream production machines from damage by efficiently separating foreign particles. The magnetic separators remove metallic contaminants, thus preventequipment from damage and consequently reduce the risk of production downtimes.

Similar to the basic version MAS B, also the new switchable type MAS H is cleaned "out-of-place". For this purpose the magnetic unit is removed from the housing for manual cleaning. In contrast to the type MAS B with a constant magnetic field, with the new type MAS H the magnetic field can be deactivated by a hand lever, so that the magnetic force on the rods is cancelled and the accumulated particles are released by themselves. A patented locking mechanism ensures that the magnetic force can only be released after the unit has been removed from the housing and that the magnetic bars are again positioned in the product area when reassembling the unit.

The new type MAS PA can be fully integrated into automated processes. The basic prerequisites for this are standardized CIP processes and a bypass valve for the removal of foreign particles. Via a pneumatic actuator the magnets are removed from the product area without further manual intervention, whereby the accumulated particles are automatically released from the bars and discharged into the product area.

As a leading supplier of component solutions for the food and pharmaceutical industries, GEA pays great attention to hygienic design requirements and strict compliance with relevant standards regarding the use of materials in contact with food, such as FDA 21 CFR 177.2600 and EC 1935/2004.

GEA is one of the worlds largest systems suppliers for the food, beverage and pharmaceutical sectors. The international industrial technology group specializes in machinery and plants as well as advanced process technology, components and comprehensive services.

With more than 18,000 employees, the group generated revenue of more than EUR 4.6 billion in fiscal year 2020. A major focus is on continuously enhancing the sustainability and efficiency of customers production processes. GEA plants, processes and components help achieve significant reductions in carbon emissions, plastic use and food waste in production worldwide. In this way, GEA makes a decisive contribution toward a sustainable future, fully in line with its corporate philosophy of engineering for a better world. GEA is listed in the German MDAX and the STOXX Europe 600 Index, and is also among the companies comprising the DAX 50 ESG and MSCI Global Sustainability Indices.

GEA is one of the worlds largest systems suppliers for the food, beverage and pharmaceutical sectors. The international industrial technology group specializes in machinery and plants as well as advanced process technology, components and comprehensive services. With more than 18,000 employees, the group generated revenue of more than EUR 4.6 billion in fiscal year 2020. A major focus is on continuously enhancing the sustainability and efficiency of customers production processes. GEA plants, processes and components help achieve significant reductions in carbon emissions, plastic use and food waste in production worldwide. In this way, GEA makes a decisive contribution toward a sustainable future, fully in line with its corporate philosophy of engineering for a better world.

reliably removing foreign particles from products and processes gea extends aseptomag magnetic separator portfolio

reliably removing foreign particles from products and processes gea extends aseptomag magnetic separator portfolio

Magnetic separators are a crucial component on the way to maximum plant availability and food quality. Striving for maximum protection of customers' manufacturing processes and therewith protection of product quality and safety, the systems supplier, machinery and plant manufacturer GEA is expanding its Aseptomag magnetic separator portfolio. The manually switchable MAS H version, including a patented locking mechanism, and the pneumatically switchable MAS PA version for "Cleaning-in-Place (CIP)" processes are the latest achievements in this regard.

Three particularly good arguments for magnetic separators With its Aseptomag magnetic separator portfolio, GEA supports its customers in the food, pharmaceutical and chemical industries in achieving three goals: improving product quality, preventing plant from damage and increasing plant availability.

Magnetic separators improve product quality Plant engineers and food producers from a wide range of applications are only too familiar with this problem: foreign magnetic particles in the production process. Typical sources of these are, for example, ferric products such as cocoa or debris in raw materials such as fruits and vegetables. For instance, the market offers chocolate with up to 3 milligrams of iron per 100 grams - especially dark chocolate. Metallic residues at fruits and vegetables are often caused by abrasions from steel tools used during harvest or by steel components on packaging, such as metallic retaining clips.

Magnetic separators protect processing plants Magnetic separators prevent downstream production machines from damage by efficiently separating foreign particles. The magnetic separators remove metallic contaminants, thus preventequipment from damage and consequently reduce the risk of production downtimes.

GEA Aseptomag magnetic separators increase plant availability through efficient cleaning Similar to the basic version MAS B, also the new switchable type MAS H is cleaned "out-of-place". For this purpose the magnetic unit is removed from the housing for manual cleaning. In contrast to the type MAS B with a constant magnetic field, with the new type MAS H the magnetic field can be deactivated by a hand lever, so that the magnetic force on the rods is cancelled and the accumulated particles are released by themselves. A patented locking mechanism ensures that the magnetic force can only be released after the unit has been removed from the housing and that the magnetic bars are again positioned in the product area when reassembling the unit.

The new type MAS PA can be fully integrated into automated processes. The basic prerequisites for this are standardized CIP processes and a bypass valve for the removal of foreign particles. Via a pneumatic actuator the magnets are removed from the product area without further manual intervention, whereby the accumulated particles are automatically released from the bars and discharged into the product area.

Upgrades made easy thanks to modular design The new types MAS H and MAS PA use the same housing as the existing type MAS B. An upgrade to a different magnetic unit is therefore possible at all times with ease and minimum effort required.

Hygienic design and use of food grade materials As a leading supplier of component solutions for the food and pharmaceutical industries, GEA pays great attention to hygienic design requirements and strict compliance with relevant standards regarding the use of materials in contact with food, such as FDA 21 CFR 177.2600 and EC 1935/2004.

magnetic separators aseptomag mas h

magnetic separators aseptomag mas h

Magnetic separators of the type MAS H extract magnetic particles from the product. The innovative locking device enables maximum product and process safety while the manual deactivation of the magnetic field reduces plant downtime.

Magnetic separators of the type MAS H extract magnetic particles from the product. The innovative locking device enables maximum product and process safety while the manual deactivation of the magnetic field reduces plant downtime.

The magnetic unit must be removed from the housing in order to manually clean the rods from the collected particles. The deactivation of the magnetic field via the ergonomic hand lever eases this process and reduces service time.

Housing Housings for magnetic separators are available with two ports executed with standard butt-weld connections by default. Other pipe connections are available upon request. The housing is identical for all three types (MAS B, MAS H & MAS PA) and includes an orientation point to enable ideal flow conditions inside the housing due to ideal positioning of the magnetic rods.

Magnetic Unit The magnetic unit of the type MAS H contains 7 rods filled with multiple equally strong permanent magnets to create a consistent magnetic field inside the housing. The foreign particles remain at the rods and can therefore no longer harm components and machines. The cleaning of the rods is done manually and outside the process (cleaning out of place). The magnetic field inside the rods can by deactivated via a manual hand lever which results in significant simplification of the cleaning step.

Clamp Due to its solid construction, the GEA Aseptomag clamp enables a pressure stable and safe connection of the main components. The special design with three segments allows a service-friendly handling of the component, even under tight space conditions.

Magnetic Separators primary serve as protection of processing plants from foreign steel and other magnetic particles and consequently have a wide range of applications. The origin of foreign magnetic particles in a process varies. Typical sources are ferric products such as cacao or debris in raw materials such as fruits and vegetables.

Magnetic separators of the type MAS PA are suitable for cleaning in place processes. The magnetic field can be deactivated via a pneumatic actuator which enables our customers to run the magnetic separator in a fully automated process.

GEA is one of the worlds largest systems suppliers for the food, beverage and pharmaceutical sectors. The international industrial technology group specializes in machinery and plants as well as advanced process technology, components and comprehensive services. With more than 18,000 employees, the group generated revenue of more than EUR 4.6 billion in fiscal year 2020. A major focus is on continuously enhancing the sustainability and efficiency of customers production processes. GEA plants, processes and components help achieve significant reductions in carbon emissions, plastic use and food waste in production worldwide. In this way, GEA makes a decisive contribution toward a sustainable future, fully in line with its corporate philosophy of engineering for a better world.

tagged with aseptomag - gea video portal

tagged with aseptomag - gea video portal

GEA is one of the largest technology suppliers for food processing and a wide range of other industries. The global group specializes in machinery, plants, as well as process technology and components.

GEA is one of the largest technology suppliers for food processing and a wide range of other industries. The global group specializes in machinery, plants, as well as process technology and components.

extended range of magnetic separators - euro bulk systems

extended range of magnetic separators - euro bulk systems

GEA, Dsseldorf, Germany, is expanding its Aseptomag magnetic separator portfolio. The manually switchable MAS H version, including a patented locking mechanism, and the pneumatically switchable MAS PA version for cleaning-in-place (CIP) processes are the latest achievements in this regard.

With its Aseptomag range of magnetic separators, GEA supports its customers in the food, pharmaceutical and chemical industries in achieving three goals: improving product quality, preventing plant from damage and increasing plant availability.

As with the basic version MAS B, the new switchable type MAS H is also cleaned out-of-place. For this purpose the magnetic unit is removed from the housing for manual cleaning. In contrast to the type MAS B with a constant magnetic field, with the new type MAS H the magnetic field can be deactivated by a hand lever, so that the magnetic force on the rods is cancelled and the accumulated particles are immediately released. A patented locking mechanism ensures that the magnetic force can only be deactivated after the unit has been removed from the housing and that the magnetic bars are again positioned in the product area when reassembling the unit. The new type MAS PA can be fully integrated into automated processes. The basic prerequisites for this are standardised CIP processes and a bypass valve for the removal of foreign particles. The new types MAS H and MAS PA use the same housing as the existing type MAS B. An upgrade to a different magnetic unit is therefore easily achievable.

As a leading supplier of component solutions for the food and pharmaceutical industries, GEA attaches importance to hygienic design requirements and strict compliance with relevant standards regarding the use of materials in contact with food, such as FDA 21 CFR 177.2600 and EC 1935/2004. www.gea.com

magnetic separators

magnetic separators

The science of magnetic separation has experienced extraordinary technological advancements over the past decade. As a consequence, new applications and design concepts in magnetic separation have evolved. This has resulted in a wide variety of highly effective and efficient magnetic separator designs.

In the past, a process engineer faced with a magnetic separation project had few alternatives. Magnetic separation was typically limited and only moderately effective. Magnetic separators that utilized permanent ferrite magnets, such as drum-type separators, generated relatively low magnetic field strengths. These separators worked well collecting ferrous material but were ineffective on fine paramagnetic particles. High intensity magnetic separators that were effective in collecting fine paramagnetic particles utilized electromagnetic circuits. These separators were large, heavy, low capacity machines that typically consumed an inordinate amount of power and required frequent maintenance. New developments in permanent magnetic separation technology now provide an efficient alternative for separation of paramagnetic materials.

Technological advances in the field of magnetic separation are the result of several recent developments. First, and perhaps most important, is the ability to precisely model magnetic circuits using sophisticated multi-dimensional finite element analysis (FEA). Although FEA is not a new tool, developments in computing speed over the last decade have made this tool readily accessible to the design engineer. In this technique, a scaled design of the magnetic circuit is created and the magnetic characteristics of the individual components quantified. The FEA model is then executed to determine the magnetic field intensity and gradient. Using this procedure, changes to the magnetic circuit design can be quickly evaluated to determine the optimum separator configuration. This technique can be applied to the design of both permanent and electromagnetic circuits. As a consequence, any type of magnetic separator can be developed (or redesigned) with a high level of confidence and predictability.

Equally important has been the recent development of rare-earth permanent magnets. Advances in rare-earth magnet materials have revolutionized the field of magnetic separation. The advent of rare-earth permanent magnets in the 1980s provided a magnetic energy product an order of magnitude greater than that of conventional ferrite magnets. Rare-earth magnetic circuits commonly exhibit a magnetic attractive force 20 to 30 times greater than that of conventional ferrite magnets. This development has provided for the design of high-intensity magnetic circuits that operate energy-free and surpass the strength and effectiveness of electromagnets.

Finally, the materials of construction used in the fabrication of magnetic separators have advanced to a point that significantly extends service life while decreasing maintenance. Advanced materials, such as fiber composites, kevlar, ultra high molecular weight polyester, and specialty steel alloys are now commonly used in contact areas of the separator. These materials are lightweight, abrasion resistant, and comparatively inexpensive resulting in significant design advantages as compared to previous construction materials.

The evolution of high strength permanent rare-earth magnets has led to the development of high-intensity separators that operate virtually energy free. The use of rare-earth magnetic separators for beneficiation of industrial minerals has become the industry standard with literally hundreds of separators placed in recent years. The following sections present an overview of the most widely used permanent magnetic separators: rare-earth drum and rare-earth roll-type separators.

Of the roll separators, there are at least fourteen manufacturers. Most of the different makes are based on the original Permroll design concept originated by this author. Various enhancements have been mainly focused on the belt tracking methods. New magnetic roll configurations and optimization of roll designs are relatively recent innovations. Additional optimization efforts are in progress.

At last count, seven manufacturers have commercially available drum separators, most based on magnet circuits derived from the use of conventional ferrite magnet. Two unique designs have been developed with one clearly offering advantages over older configurations.

Rare-earth elements have some unique properties that are used in many common applications, such as TV screens and lighters. In the 1970s, rare-earths began to be used in a new generation of magnetic materials, that have very unique characteristics. Not only were these stronger in the sense of attraction force between a magnet and mild steel (high induction, B), the coercivity (Hc) is extremely high. This property makes the magnetization of the magnet body composed of a rare-earth element alloy very stable, i.e., it cannot easily be demagnetized.

It was a well known fact that permanent magnets positioned on both sides of a flat steel body can magnetize the steel to a high level, if the magnet poles were the same on each side, i.e., the magnets would repel each other. However, in the past, large magnet volumes were required to achieve any substantial magnetization. With the new powerful magnets, the magnet volume could be relatively small to generate high steel magnetization. In 1981 this author determined the optimum ring size for samarium-cobalt magnets. Maximum steel magnetization (near saturation) could be obtained if the rings were stacked to make a roll using a 4:1 ratio of magnet to steel thickness, see Figure 1. Since magnetized particles are attracted to the magnetized steel surface on the roll periphery, this means that 20% of the exposed roll surface would collect such material. This collection area is an order of magnitude greater than what could be achieved with prior art magnets, making the magnetic roll useful for mineral separation.

Although one of the first prototype rare-earth magnetic rolls was calculated to have about 14,000 gauss steel magnetization, it was found in comparative testing with electromagnetic induced roll (IMR) separators operating at about 21,000 gauss, that similar performance was obtained in fine particle processing (smaller than 1 mm). When processing coarser particles an improved performance was established (e.g., less weakly magnetic contaminants remaining in the upgraded product and fewer separation passes to achieve high quality). The improvement results because the magnetic force acting on the particles is high, due to a high flux gradient. An electromagnetic induced magnetic roll separator has an air gap, which must be increased to accommodate the processing of larger particles. The rare-earth magnetic roll (REMR) magnetic separator has no such air gap. Consequently, the magnetic force does not decline in the manner of an IMR set with a large air gap.

As the name implies, suspended magnets are installed over conveyors to lift tramp iron out of the burden. Suspended magnets have been more frequently applied as conveyor speeds have increased. Suspended type magnets are capable of developing very deep magnetic fields and magnet suspension heights as high as 36 are possible.

Suspended magnets are of two basic types (1) circular and (2) rectangular. Because of cost considerations, the rectangular suspended magnet is nearly always used. Magnet selection requires careful analysis of the individual system to insure adequate tramp iron removal. Factors that must be considered include:

The position in which the magnet must be mounted will also influence the size of magnet required. The preferred position is at an angle over the head pulley of the conveyor where the load breaks open and the tramp iron is free to move easily to the magnet face. When the suspended magnet must be mounted back from the head pulley parallel to the conveyor, tramp iron removal is more difficult and a stronger magnet is required.

Magnetic drum separators come in many different styles. Tramp iron drum separators usually use a magnet design referred to as a radial type. In such a unit the magnet poles alternate across the width of the drum and are of the same polarity at any point along the drums circumference. The magnet assembly is held stationary by clamp bearings and the drum shell is driven around this magnet assembly.

Drum-separators lend themselves to installation in chutes or at the discharge point of bucket elevators or screen conveyors.The capacity and type of tramp iron to be removed will determine the size selection of a drum separator. They are available in both permanent and electro magnetic types.

Standard drum diameters are 30 and 36. General guide lines, in diameter selection, are based on (1) feed volume (2) magnetic loadings and (3) particle size. The 30 diameter drum guide lines are roughly maximum of 75 GPM per foot feed volume, 8 TPH per foot magnetic loading and 10 mesh particle size. The 36 guide lines are 125 GPM per foot feed volume, 15 TPH per foot magnetic loading and 3/8 inch particle size.

For many years, wet magnetic drum separator magnet rating has been on the basis of a specified gauss reading at 2 from the drum face. The gauss reading is an average of readings taken at the centerline of each pole and the center of the magnet gap measured 2 inches from the drum surface. This rating tends to ignore edge of pole readings and readings inside of the 2 inch distance, particularly surface readings which are highly important in effective magnetic performance.

We have previously discussed dry drum separators as used for tramp iron removal. A second variety of drum separator is the alternating polarity drum separator. This separator is designed to handle feeds having a high percentage of magnetics and to obtain a clean, high grade, magnetic concentrate product. The magnet assembly is made up of a series of poles that are uniform in polarity around the drum circumference. The magnet arc conventionally covers 210 degrees. The magnet assembly is held in fixed operating position by means of clamp bearings and the cylinder is driven around this assembly.

Two styles of magnet assemblies are made up in alternating polarity design. The old Ball-Norton type design has from 8 to 10 poles in the 210 arc and develops a relatively deep magnetic field. This design can effectively handle material as coarse as 1 inch while at the same time imparting enough agitation in traversing the magnetic arc to effectively reject non-magnetic material and produce a clean magnetic concentrate product. The 30 diameter alternating polarity drum is usually run in the 25 to 35 RPM speed range.

Application of the high intensity cross-belt is limited to material finer than 1/8 inch size with a minimum amount of minus 200 mesh material. The cost of this separator is relatively high per unit of capacity approaching $1000 per inch of feed width as compared to $200 per inch of feed width on the induced roll separator.

This investigation for an improved separator is a continuation of the previously reported pioneering research of the Bureau of Mines on the matrix-type magnetic separator. When operated with direct current. or a constant magnetic field, the matrix-type magnetic separator has several disadvantages, which include incomplete separation of magnetic and nonmagnetic components in one pass and the retention of some of the. magnetic fraction at the discharge quadrant. Since the particle agitation that results from pulsed magnetic fields may overcome these factors, operation with an alternating current would be an improvement. Another possibility is the separation of dry feeds, which may have applications where the use of water must be avoided.

The effects of an alternating field were first described by Mordey and later by others of whom Doan provides a bibliographical resume. The significant feature to note in the description by Mordey is the change from a repulsion in weak fields to an attraction in strong fields, in addition to a difference in response with different minerals. The application by Mordey was with wet feeds using launders and inclined surfaces, although applications by others are with both wet and dry feeds.

Except for occasional later references the interest in alternating current for magnetic separation has almost disappeared. Lack of interest is probably due to the apparent high power consumption required to generate sufficiently intense magnetic fields, a problem that warrants further consideration.

The matrix separator differed somewhat from the slotted pole type described in a previous report in that the flux passed into the matrix from only one side, the inverted U-shaped magnet cores 4 and 7 illustrated in figure 1. Figure 1 shows a front view, side view, and a bottom view of the matrix-type magnetic separator. By this arrangement, an upward thrust could be exerted on the matrix disk during each current peak; the resulting induced vibration would accelerate the passage of the feed as well as the separation of the magnetic particles from the nonmagnetic particles since the applied field during the upward thrust preferentially lifts

The matrix disk 5 rotates successively through field and field-free quadrants. Where a given point on the disk emerges into a field quadrant, feed is added from a vibrating feeder; nonmagnetic particles fall through the matrix, and magnetic particles are retained and finally discharged in the succeeding field-free quadrant.

Two types of disks were used, a sphere matrix illustrated in top and cross-sectional views in figure 2 and a grooved plate type similarly illustrated in figure 3. Both the spheres and grooved plates were mounted on a nonmagnetic support 1 of optimum thickness for vibration movement (figs. 2-3). The sphere matrix disk, similar to that of the earlier model, had a matrix diameter 8 of 8.5 inches and spokes 7 spaced 45 apart; the spheres were retained by brass screens 4 (fig. 2).

The grooved plate disk was an assemblage of grooved steel plates that tapered so that one edge 5 was thinner than the other 6 (fig. 4) to provide a stack in the form of a circle having an outside diameter 9 of 7.9 inches (fig. 3). The plates were retained by two split aluminum rings 8 and 3 clamped in two places 1 and 11. They were stacked so that the vertically oriented grooves of one plate touched the flat side of the second plate. As illustrated in figure 4, two slots 3 and 4 were added to reduce eddy current losses.

Both disks 5 illustrated in figure 1 were rotated by a pulley 1 through a steel shaft 8 held by two aluminum bars 2 and which in turn were fastened to aluminum bars 3 and steel bars 6. The magnetic cores 4 and 7 were machined from 10- by 12-inch E-shaped Orthosil transformer laminations. For wet feeds,

With the information derived from the performance of this separator, a cross-belt-type separator was also constructed as illustrated in figure 5, which shows a front view and a cross-sectional view through the center of the magnet core. The cross-belt separator mentioned here differs somewhat from the conventional cross-belt separator in that the belt 5 moves parallel to the feed direction instead of 90 with the feed direction. The magnetic core, composed of parts 17, 19, 21 and 22 that were machined from 7--by 9 inch E-shaped Orthosil transformer laminations, supplies a magnetic field between one magnetic pole 6, which has grooves running parallel to the feed direction, and the other magnetic pole 14. Owing to the higher intensity field at the projection from the grooves, magnetic particles are lifted from feeder 15 to the belt 5. By movement on flat-faced pulleys 3 supported by bearings 4 the belt 5 carries the particles to the discharge chute 7. Nonmagnetic particles fall from the feeder edge and are discharged on the chute 8. A special 0.035-inch-thick Macarco neoprene-dacron endless belt permits a close approach of the feeder surface to the magnet pole 6. The feeder 15 constructed of plexiglass to prevent vibration dampening by eddy currents, is fastened to a vibration drive at 16 derived from a small vibrating feeder used for granular materials. A constant distance between poles 6 and 14 was maintained by acrylic plastic plates 9 on each side of the poles 6 and 14 with a recessed portion 13 to provide room for the belt 5 and feeder 15. The structural support for the separator, which consisted of parts 1, 2, 11, 18, and 20, was constructed of 2- by 2- by -inch aluminum angle to form a rectangular frame, and part 10 was machined from angular stock to form a support for the magnet core.

Each U-shaped magnet core in figure 1 was supplied with two 266-turn coils and two 133-turn coils of No. 10 AWG (American wire gage) heavy polythermaleze-insulated copper wire. With alternating current excitation, the current and voltage are out of phase so that the kilovolt-ampere value is very high even though the actual kilowatt power is low. This difference may be corrected with either series capacitors to reduce the input voltage or parallel capacitors to reduce the input current. However, the circuit that was selected is illustrated in figure 6 in which the two 266-turn coils are connected in series with the capacitor 2. Power is supplied by the 133-turn drive coil 7 that is connected in series with the 133-turn drive coil 9 on the other U-shaped magnet core. Coils 4 and 6 and the capacitor 2 form a circuit that resonates at 60 hertz when the capacitor 2 has a value of 49 microfarads in accordance with the equation

For the capacitance in the power input circuit, the value is calculated on the basis of the equality of equations 2-3. When the input at point 10 is 10 amperes at 126 volts or 1.26 kilovolt-amperes, the current at point 3 and the voltage at

point 1 are 10 amperes and 550 volts, respectively, or a total of 11.0 kilovoIt-amperes for the two magnet cores, which provides a 5,320-ampere- turn magnetization current. The capacitors, a standard power factor correction type, had a maximum rating of 600 volts at 60 hertz.

Application of alternating current to the cross-belt separator is not successful. In contrast to the matrix-type separator in which the feed is deposited on the magnetized matrix, the feed for the cross belt is some distance below a magnet pole where the field is weaker and the force is a repulsion. Even though the magnetic force with the matrix-type separator may be a repulsion instead of an attraction, it would result in the retention of the magnetic fraction in the matrix. Replacement of the alternating current with an intermittent current eliminates the repulsion effect but still retains the particle vibration characteristics.

For an intermittent current the circuit shown in figure 7 is used. A diode 5 supplies the current to a coil 4, which can be the magnetizing coil for the cross-belt separator, or for one magnet core of the matrix-type separator that is connected in parallel or series with the coil for the other core. A coil 2 is supplied with half-wave-rectified current from a diode 6 but is out of phase with the other coil 4 and is only applicable to a second separator. However, the circuit illustrates the reduction of the kilovolt-ampere load of intermittent magnetizing currents. As an example, measurements were, made with the two magnet cores of figure 1; each core had 532 turns of wire. When the capacitor 9 has a value of 72 microfarads, the current at point 8 is 13 amperes, and the voltages at points 10, 1, and 7 are 75, 440, and 390 volts, respectively. The kilovoIt-ampere input at point 11 is therefore 0.98, and the kilovolt-amperes supplied to the coils is 5.07. This circuit is not a simple resonance circuit, as shown in figure 6, but a circuit in which the correct value of the capacitor 9 depends on the current. At currents lower than 13 amperes, the 72-microfarad value is too large.

However, separations with intermittent current were confined to a simple one-diode circuit. With the matrix-type separator, each magnet core carried 10.5 amperes at 240 volts through 399 wire turns or a total of 21 amperes since the two cores were connected in parallel. For the cross-

belt separator illustrated in figure 5, five 72-turn coils and one 96-turn coil wound with No. 6 AWG heavy polythermaleze-insulated square copper wire were used in series connection. Current-carrying capacity is approximately 40 amperes with an input of approximately 80 volts of half-wave-rectified 60-hertz current. At 40 amperes, the average number of ampere turns would be 18,240. Intermittent current and voltage were measured with the same dynamometer meters used for alternating current; these meters measure an average value.

It is possible to increase the magnetizing current for the matrix-type separator without excessive vibration by increasing the thickness of the plate 1 (figs. 2-3). Another alternative is a combination of intermittent and constant magnetic fields. Although a variety of circuits are possible, the combination of fields was accomplished with the simple adaptation of the stray field losses in a U-shaped magnet core using the circuit of figure 8. The power drawn is full-wave rectification, or half wave for each leg of the magnet core with the flux, from the coils 3 and 4 adding. Owing to magnetic leakage, the flux from the coil nearest to the magnet pole tested predominates. When the magnetic field is measured with a Bell model 300 gaussmeter and observed with a Tektronix type 547 oscilloscope with a type 1A1 amplifier, the results of figure 9 represent a pulsating magnetic field on top of a constant magnetic field plateau.

Although it is known that minerals in water suspension may be separated in the constant-field matrix-type separator at fine sizes, some tests were conducted to investigate if any beneficial effects exist with an intermittent field. One advantage that was found with a minus 325-mesh feed was an increase in the completeness of the discharge of the magnetic fraction with an intermittent field as illustrated in tables 1-2. Both tests had the same average current of 10.5 amperes through the magnetizing coils of each magnet core illustrated in figure 7. The matrix consisted of 1/16-inch-diameter steel spheres.

In the two short-period comparative tests, the wash water for removing the magnetic fraction was the same and was of a quantity that permitted complete discharge with the intermittent field and partial removal with the constant field. After the test was completed, magnetic particles retained with the constant field were determined by a large increase in the intensity of flow of wash water, a flow volume that would not be practical for normal operation. For separation efficiency, the intermittent field had no advantage over the constant field probably because of a lack of vibration response with minus 325-mesh particles at 60 hertz. This will be described later with dry feeds.

Dry magnetic separation at coarse sizes is not a problem because it may be accomplished with a variety of separator types. Difficulty at fine sizes is twofold. First, the feed rate capacity decreases in the separators with moving conveyor surfaces such as the induced roll and cross-belt separators in which the attracted magnetic particles would have to move at nominal feed rates through a thick layer of nonmagnetic particles; second, an agglomeration effect is present that increases with decrease in particle size.

Results of the separation of several mineral combinations in the size range of minus 200 plus 325 mesh are summarized in tables 3-5. Table 3 illustrates the separation of -Fe2O3 from quartz in an ore with one pass through a matrix of 1/8-inch-diameter steel spheres using the alternating current circuit of figure 6.

Application of an intermittent field with a matrix of 75 percent 1/16-inch-diameter steel spheres and 25 percent 1/8-inch-diameter steel spheres is illustrated in table 4 in a one-pass separation of pyrrhotite from quartz using the circuit of figure 7. Unlike table 3, no attempt was made to obtain an intermediate fraction, which would have resulted in raising and lowering the iron compositions of the magnetic and nonmagnetic fractions, respectively, and provided a fraction for repass with increased recovery.

Table 5 gives the results of the application of a partially modulated field using the circuit of figure 8 and the grooved plate matrix of figure 3 in a one-pass separation of ilmenite from quartz. The advantage of the grooved plate over the spheres is that the particles pass through the matrix in a shorter time. The high flow rate obtained using the grooved plate could be increased further, particularly if water is used, by attaching suction chambers under the disk in a manner similar to applications with continuous vacuum filters. Although the grade and recovery of ilmenite are very high, this need not necessarily be attributed to the grooved-plate matrix since the ampere turns are higher than in any of the other tests. Increased ampere turns is a prerequisite for successful application of alternating current separators and intermittent current separators.

When a minus 325-mesh fraction is tested, a separation sometimes occurs, but in most cases the feed passes through without separation. Response at higher frequencies was investigated with a smaller -inch-cross section U-shaped magnet core 1 (fig. 10). Separation was performed with a nonmagnetic nonconducting plane surface 3 moved manually across the magnet pole as illustrated by the direction arrow 4. When separation occurred, the nonmagnetic mineral 5 would move with the plane, and the magnetic mineral would separate from the nonmagnetic mineral by remaining attached to the magnet pole. When no separation occurred, the entire mixture of magnetic and nonmagnetic minerals would either move with the plane or adhere to the magnet pole.

Four magnetising coils of 119 turns each of No. 14 AWG copper wire were used; three were connected in series with a capacitor as in figure 6, and one was connected to a variable-frequency power supply. The current in the resonant circuit is approximately 5 amperes. When the capacitor has a value of 49 microfarads, the resonant frequency is 130 hertz, and no separation occurs. With the capacitor reduced to 10 microfarads to provide a resonant frequency of 300 hertz, a separation occurs. In the case of a minus 325-mesh -Fe2O3-quartz mixture, most of the quartz moves with the plane, and the -Fe2O3 remains attached to the magnet pole. Similar results are obtained with pyrrhotite-quartz. Indications are that the separation may be improved with preliminary treatment of the feed by dry grinding aids.

frequencies, the time per cycle is too short to permit initial magnetization; at very low frequencies, the magnetization is in phase with the field. The frequencies reported here are between these two extremes and probably near, and just above, the low frequency limit. Experimental values on particles in the size range of minus 35 plus 65 mesh were previously published. These data indicate that 0.16 second, the time required to traverse a magnetizing field distance of 0.9 inch at 5.5 inches per second, is adequate time for the magnetization of minerals, but 0.02 second, the time required to traverse approximately 0.1 inch at the same rate, is too short. Time lag has been reported in the literature for magnetic alloys and has been classified, to the exclusion of the eddy current lag, into a lag that is dependent on impurities and a Jordan lag that is independent of temperature.

From evidence derived from the Barkhausen effect, the magnetization does not proceed uniformly and simultaneously throughout a specimen but is initiated in a limited region from which it spreads in a direction parallel to the field direction at a finite velocity. In a changing magnetic field, the number of initiating nuclei is proportional to the cross-sectional area perpendicular to the direction of the field. For a specimen in the form of a cube, the rate of energy W transferred to the cube would therefore be proportional to the aforementioned cross-sectional area so that for a cube of side s,

Application of intermittent current to the cross-belt separator arose from the need for the dry separation of an iron composition material from the copper in a product submitted by personnel of a Bureau of Mines chalcopyrite vacuum decomposition project. Although this product was of a relatively coarse size, the matted mass resulting from the needle shape or fiber form of the copper and the magnetic field coagulation effects of the magnetic particles prevented use of commercial dry separators such as the induced roll separator and constant-field cross-belt separator. The pulsating magnetic field had a separation effect similar to the pulsations in a hydraulic jig; the pulsating magnetic field permits the nonmagnetic fibers to sink back to the vibrating feeder and allows the magnetic particles to rise to the belt. Other applications would include fibrous minerals such as tremolite, actinolite, and chrysolite, and matted and fibrous secondary materials.

Application of alternating and intermittent current to magnetic separation at a relatively high number of ampere turns was made possible by special electronic circuits. Actual power losses are low and include the IR loss, which is the same that occurs in direct-current magnetic separation, and the core loss, which has a magnitude corresponding to the IR loss. Minerals may be dry-separated close to the minus 325-mesh size at 60-hertz frequency and possibly at smaller particle sizes at higher frequency. In the wet separation of minus 325-mesh feeds, intermittent current provides for complete release of the magnetic fraction during the discharge cycle. For matted fibrous and magnetically coagulating feeds, a cross-belt separator with an intermittent magnetizing current provides efficient separations.

tagged with separator - gea video portal

tagged with separator - gea video portal

GEA is one of the largest technology suppliers for food processing and a wide range of other industries. The global group specializes in machinery, plants, as well as process technology and components.

GEA is one of the largest technology suppliers for food processing and a wide range of other industries. The global group specializes in machinery, plants, as well as process technology and components.

magnetic filters, hygienic (ehedg) | goudsmit magnetics

magnetic filters, hygienic (ehedg) | goudsmit magnetics

These hygienic filters are specially designed for the high hygienic requirements in the food and pharmaceutical industry. They meet the EHEDG guidelines for providing optimal food safety.For magnetic filtering of fine ferrous contaminants - such as stainless steel wear particles - from your liquid and powder flows in pressure pipes up to 10 bar.

This type of magnetic filter is designed according to EHEDG specifications, especially for the high hygienic requirements of the food and pharmaceutical industries. The products to be transported are usually liquids or powders with a risk of bacterial growth. Suited for pressures up to 10 bar and temperatures up to 140C.

Click on a product variant to find the data sheet, drawings and other downloadable product information. Short description This magnetic filter has an optimal hygienic design according EHEDG specifications. You can choose from various common connection types. Equipped withextractor bars 25/23 mmfor 'quick cleaning'. See tab 'Working principle' for explanation. Summary of important specifications Flat, dismountable bottom Magnetic bars 23/25 mm Magnet quality N-42SH,8,000 gauss on tube 25 mm Max. 10 bar / 140 C Inlet/outlet: ISO 2-4"/DN50-125welded tube oraseptic clampjointDIN11864 Finish: HDN welded,polished Materials - in contact with product: AISI316(L) Material gaskets: Silicone acc. EC1935 /FDA

Online accessories & spare parts Click on a product variant to find the online availableaccessories & spare parts. Several interface connection types Weld tube DN50-125 mm acc. DIN 11850 R2/DIN 11866 A Weld tube 2-4" acc. DIN 11850/ISO 2037 Ferrule aseptical clamp jointDN50-125 mm acc. DIN 11864 A-3

The magnetic unitwith very strong neodymiummagnetic bars is positioned in the middle of the product flow.The product with ferrous impuritiespasses several magnetic bars while flowing throughthe filter. The magnets attract passing ferromagnetic contaminants. The capturedparticles stick to the magnets, while the purified product flows further. How does the cleaning / iron discharging work? Once the product flow is stopped, you take the entire magnetic grid unit out of the product channel.Then pull the magnetic bars out of the extractor tubes, causing the ferrous particles to fall off the extractor tubes. Cleaning / iron discharging sequence Stop the product flow. Unscrew the clamp connection ofthe magnet unit. Liftthe complete magnet unit out of the housing. Takethe magnet unit out of the extractor unit and place it away from the extractor unit on a clean surface. Catch the ferrous particles that now will fall off the tubes and dispose them. Wipe clean all partswith asoft cloth and - if necessary - a suitable cleaning fluid. Shove the magnet unit back into the extractor unit. Placethe complete magnet unit assembly back into the housing. Replace the clamp and re-tighten it by tightening the screw connection. Restart the product flow.

The magnetic unitwith very strong neodymiummagnetic bars is positioned in the middle of the product flow.The product with ferrous impuritiespasses several magnetic bars while flowing throughthe filter.

Once the product flow is stopped, you take the entire magnetic grid unit out of the product channel.Then pull the magnetic bars out of the extractor tubes, causing the ferrous particles to fall off the extractor tubes.

Our Compliance Engineer Alwin de Bruine got this question. His answer: Customers from the top end of the food industry were ahead of the curve in requesting EHEDG-certified magnetic separators. The market is becoming increasingly aware of the importance...

Our Compliance Engineer Alwin de Bruine got this question. His answer: Customers from the top end of the food industry were ahead of the curve in requesting EHEDG-certified magnetic separators. The market is becoming increasingly aware of the importance...

eriez magnetic separation

eriez magnetic separation

Eriez Permanent Magnetic Separators require no electric power. With proper care, they can last a lifetime with very little loss of magnetic field strength. Eriez permanent magnets are supplied for a wide range of applications including dry bulk materials, liquids or slurries and even high temperature applications. Select Eriez Permanent Magnetic Separators are available with the Xtreme RE7 Magnetic Circuit - the industry's strongest magnet!

Eriez Permanent Magnetic Separators require no electric power. With proper care, they can last a lifetime with very little loss of magnetic field strength. Eriez permanent magnets are supplied for a wide range of applications including dry bulk materials, liquids or slurries and even high temperature applications.

Electromagnetic Separators use wire coils and direct current to provide a magnetic field which can be used to separate ferrous material from non ferrous products. Electromagnetic separators offer greater flexibility and strength as well as different magnetic fields for specific applications.

gea control valves aseptomag rv

gea control valves aseptomag rv

An electro-pneumatic positioner enables the exact setting of the valve stem by controlling the pneumatic actuator. A welded stainless steel bellows is used to hermetically seal the product area from outside contamination. This special design and the durable valve seat seal, made of Tefasep, enables optimum process and product safety.

Housing Housings for control valves are available with either two or three port connections. The valves are produced with standard butt-weld connections by default. Mixed port connection sizes as well as various aseptic pipe connections are available upon request. Internal Assembly The internal assembly is available with or without a shrunk or screwed valve seat seal. In addition to the standard sealing material Tefasep, other material options such as PTFE and EPDM are also available. The control cone is designed as equal-percentage by default. Actuator The standard version of the pneumatic actuator is designed as spring-closing / air-opening (NC). Alternatively, an air-closing / spring-opening (NO) option is available. Clamp Due to its solid construction, the GEA clamp enables a pressure stable and safe connection of the main components. The special design with three segments allows a service-friendly handling of the component, even under tight space conditions. Positioner / Process Controller Aseptic control valves are usually equipped with a closed centralized positioner (GRZ) mounted directly on top of the valve by a specifically designed adaptor. Depending on process requirements, it is also possible to apply a process controller instead. Other control options are available upon request.

Aseptic bellows valves distinguish themselves with the uncompromisingly hermetic seal of the valve stem, thereby minimizing contamination risks and maximizing detection possibilities. The Aseptomag valve line is the equivalent for aseptic processes to the hygienic VARIVENT valve line and provides everything from shut-off and bottom-seat to mixproof and sampling valves. The valves meet the highest hygienic standards required, such as EHEDG and 3-A standards. Thanks to the modular structure, the Aseptomag valve line also allows tailor-made valve solutions for specific process requirements (higher closing pressures, special materials, special design, etc). Aseptomag valves can be equipped with T.VIS control tops and can therewith seamlessly be integrated into an automated process plant.

For aseptic processes, the following areas have to be considered: Product sterilization, conveying and maintaining sterility, and filling under sterile conditions. Aseptic processes signify high-quality products and/or long shelf-life, produced for specific consumer groups. Besides classic UHT milk products, medical nutrition, baby food, aseptically produced beverages and applications within biotech belong to this hygienic class.

Control valves of the Aseptomag valve line are characterized by their uncompromising stainless steel bellow design. The inverted control valve is specifically designed for installations where product enters the valve from the bellow side.

Leakage tank bottom valves of the Aseptomag valve line are characterized by their uncompromising stainless steel bellow design. With their leakage area between the two valve seats open to atmosphere, the valve is an ideal fit for UltraClean mixproof applications.

Leakage valves of the Aseptomag valve line are characterized by their uncompromising stainless steel bellow design. The valve type ADV includes one integrated steam barrier (ISB) and other than Aseptomag DK valves, one valve seat is sealed via a radial form seal.

Leakage valves of the Aseptomag valve line are characterized by their uncompromising stainless steel bellow design. With their leakage area between the two valve seats open to atmosphere, the valve is an ideal fit for UltraClean mixproof applications.

Shut-off valves of the Aseptomag valve line are characterized by their uncompromising stainless steel bellow design. The extended bellow design of the type AF is ideal for applications with high activation frequencies.

GEA is one of the worlds largest systems suppliers for the food, beverage and pharmaceutical sectors. The international industrial technology group specializes in machinery and plants as well as advanced process technology, components and comprehensive services. With more than 18,000 employees, the group generated revenue of more than EUR 4.6 billion in fiscal year 2020. A major focus is on continuously enhancing the sustainability and efficiency of customers production processes. GEA plants, processes and components help achieve significant reductions in carbon emissions, plastic use and food waste in production worldwide. In this way, GEA makes a decisive contribution toward a sustainable future, fully in line with its corporate philosophy of engineering for a better world.

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