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.

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china feldspar magnetic separation, feldspar magnetic separation manufacturers, suppliers, price

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china magnetic separator manufacturer, air classifier, metal locator supplier - weifang guote mining equipment co., ltd

Magnetic Separator, Air Classifier, Metal Locator manufacturer / supplier in China, offering Mineral Separator Dry Process Three Rollers Permanent Magnetic Separator, 12000 GS Dry Permanent Double Rollers Magnetic Separator, Dry Process Roller Enclosed Permanent Magnetic Separator with Two Rollers and so on.

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china mineral separation equipment, mineral separation equipment manufacturers, suppliers, price

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china magnetic separator manufacturer, iron separator, eddy current separator supplier - shandong huate magnet technology co., ltd

Magnetic Separator, Iron Separator, Eddy Current Separator manufacturer / supplier in China, offering High Quality and Low Price Magnetite Ores Rotating Drum Magnetic Separator for Dry Powder and Granular Processing Industry Drum Dry Magnetic Separator, Ctf Powder Ore Dry Magnetic Separator Dry Magnetic Separator, Semi Magnetic Discharging Tailings Machine Zpg Disk Vacuum Filter and so on.

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more separator, solid waste recycling line products from china manufacturers - fushun ejet magnetic equipment co., ltd. - page 1

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magnetic, electrostatic separation | sepor, inc

The Davis Magnetic Tube Tester consists of an extremely powerful electromagnet which can generate a magnetic field intensity of up to 4,000 gauss, a glass separation tube and a motor driven agitation mechanism. The tube is positioned between the poles of the magnet at...

Meter immediately displays the DC or AC magnetic field, warms up in second. Meter does not require initial calibrations or adjustments. It can be rapidly scanned across a part to check for magnetization. The meters alarm will sound off where the magnetic field...

Model MLH (13) 111-5 is a bottom fed laboratory pilot plant dry high intensity electromagnetic separator capable of separating materials having small or large differences in magnetic susceptibility. This compact separator is designed as a high capacity alternative to...

The L-8 Wet Drum Magnetic Separator is designed for the laboratory investigation of ore concentration and beneficiation, heavy media recovery, and purification of liquids and slurries containing ferrous contaminants. Its size may also yield benefits to certain low...

Laboratory Electrostatic Separator Model EHTP (25) 111-15 is a multi-functional laboratory separator suitable for the study of electromagnetic technologies, material separation technologies and electrical drives. The unit is capable of up to 40kV. TECHNICAL...

The Model MIH(13)111-5 is a TOP FED laboratory or pilot plant dry high intensity magnetic separator, is designed to separate moderately or weakly magnetic (para- magnetic) materials. Results obtained from this small separator are scalable to predict performance from...

Laboratory High-Force Magnetic Separator L/P 10-30 designed to separate paramagnetic materials from non-magnetic materials optimized with one 100mm (4) diameter roll cassette, single magnetic zone. The magnetic zone is 200mm wide and with a dual magnetic roll...

The 3x4L is a popular batch type High- Intensity Wet Magnetic Separator designed to separate paramagnetic materials from nonmagnetic materials The unit has a large separating chamber that can accept a variety of interchangeable pole media including soft iron spheres...

The Laboratory Wet Low Intensity Drum Magnetic Separator WD (20) 111-15 is used for the recovery or removal of ferromagnetic materials from a mineral slurry. The shaped ceramic magnets are arranged in a pattern of alternating polarity for maximum cleaning efficiency...

Dry drum magnetic separators are used when separating magnetic from non-magnetic materials in powders and granular feed. Sepor can provide dry separators with low, medium and high intensity magnetic fields. The low intensity drum has a magnetic field from 600 to...

Sepor, Inc. began business in 1953 with the introduction of the Sepor Microsplitter , a Jones-type Riffle splitter, developed by geologist Oreste Ernie Alessio for his own use in the lab. Sepor grew over the next several decades to offer a complete line of mineral analysis tools, as well as pilot plant equipment for scaled operations.

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china shaking table manufacturer, mining equipment, gravity table supplier - jiangxi gandong mining equipment machinery manufacturer

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magnetic separator,magnetic separation equipment ,magnetic separator manufacturer &supplier,iron removal machine manufacturer &supplier

As a production enterprise integrating production, marketing and service, wanjiade has obtained the support and cooperation of the majority of users with its high-quality products, advanced technology and professional after-sales service, accelerated the pace of enterprise development and strived forward to the leading position in the same industry.

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quartz glass sand processing line, quartz slab sand making machine products from china manufacturers - weifang guote mining equipment co., ltd. - page 1

Magnetic Separator, Air Classifier, Metal Locator manufacturer / supplier in China, offering Mineral Separator Dry Process Three Rollers Permanent Magnetic Separator, 12000 GS Dry Permanent Double Rollers Magnetic Separator, Dry Process Roller Enclosed Permanent Magnetic Separator with Two Rollers and so on.

china magnetic separator manufacturer, wet high intensity magnetic separator, high gradient magnetic separator supplier - yueyang dalishen electromagnetic machinery co., ltd

china magnetic separator manufacturer, wet high intensity magnetic separator, high gradient magnetic separator supplier - yueyang dalishen electromagnetic machinery co., ltd

Magnetic Separator, Wet High Intensity Magnetic Separator, High Gradient Magnetic Separator manufacturer / supplier in China, offering Belt Type Conveyor Inline Overband Magnetic Separator (RCDD), High Quality Permanent Magnetic Pulley Cts (N, B) -712, Excavator Magnet for Lifting Steel Scrap on Furnace MW5-180L/1 and so on.

Yueyang Dalishen Electromagnetic Machinery Co., Ltd. (YYDLS) has decades of experience on magnetic equipments production. It is one of the leading manufacturers for magnetic machines in China.Our headquarters in Yueyang City, the electromagnet base of China, produce wet high intensity electromagnetic separators (WHIMS), high gradient magnetic separator (HGMS), rare earth drum/roll magnetic separator (REDMS/RERMS), magnetic lifting equipments, etc.YYDLS has a powerful R&D team and comprehensive lab, ...

magnetic separation equipment slurry wet magnetic separator for kaolin feldspar ceramics slurry the battery paste

magnetic separation equipment slurry wet magnetic separator for kaolin feldspar ceramics slurry the battery paste

Latest new design promotional price slurry wet magnetic separator Product Description Product Characteristic Electromagnetic dried-powder separator is a newly development machine. The characteristics of magnetic system are large wrap angle, multi-magnetic-pole. The absolute value of magnetic flux density of separation area is evenly. We can design different magnetic field intensity as the property of raw ores. Also, dried-powder separator doesnt need to come over the gravity and resistance of the raw material. When the nonmagnetic minerals break away from the magnetic field, it can depart from the magnetic cylinder very well. With the mechanical vibrating equipment, it not only can improve the efficiency of iron remove but also can be easier to discharge the iron. Operation Process Feed the dry powder from the hopper, meanwhile make the separator state at the magnetizing and run a vibrator. After a period, stop feeding, cut off the magnetic device, run the other vibrator (keep the two vibrator running), poke the raffle of drain of material funnel into the iron discharge. Then discharge the magnetic material absorbed on the magnetic media relying on the vibrating force. Application Scope Electromagnetic dried-powder separators are applied in process the fine mineral particle, the magnetic fine ferrous mineral particle such as hematite, martite, limonite, siderite, chromite, polianite; and also fine nonferrous metals mineral particle, for example wolframite; fine rare earth mineral particle, for example eremite; and fine nonmetallic mineral particle such as feldspar, quartz, kaoli. Electromagnetic dried-powder separators are suitable for using at the drought and water shortage area. Technology parameter of contrast Model WJ160S-B-V-1.5 WJ89B-V-3 WJ190B-V-3 WJ250-V-7 WJ250-V-11 WJ250-V-18.5 WJ400-V-20 Magnetic field strength(T) 2.5 2.5 2 3 3.5 3 3.5 Input voltage(ACV) 220 380 220 380 380 380 380 Maximumoutput current(DCA) 10 7 7 20 20 55 25 Maximum coil power(KW) 1.5 3 3 7 11 18.5 20 Insulation method E E E E E E E Cooling method water and oil double cooling water and oil double cooling water and oil double cooling water and oil double cooling water and oil double cooling water and oil double cooling Water and oil double cooling Magnetic lumen diameter(mm) 160 89 190 250 250 250 400 Pipe size(mm) 50 50 50 89 89 89 89 yield(m/h) 3-10 0.1-0.5 5-10 10-30 10-30 10-30 20-60 dimension(mm) 946(H) 500*500*1000 860*860*1540 1200*1200*1850 1200*1200*1850 1400*1400*1850 1500*1500*1850 Main machine weight 180 250 510 1050 1210 1500 3000 (KG) Usage Applicable for 40-400 mesh feedstock of iron elimination

Electromagnetic dried-powder separator is a newly development machine. The characteristics of magnetic system are large wrap angle, multi-magnetic-pole. The absolute value of magnetic flux density of separation area is evenly. We can design different magnetic field intensity as the property of raw ores. Also, dried-powder separator doesnt need to come over the gravity and resistance of the raw material. When the nonmagnetic minerals break away from the magnetic field, it can depart from the magnetic cylinder very well. With the mechanical vibrating equipment, it not only can improve the efficiency of iron remove but also can be easier to discharge the iron.

Feed the dry powder from the hopper, meanwhile make the separator state at the magnetizing and run a vibrator. After a period, stop feeding, cut off the magnetic device, run the other vibrator (keep the two vibrator running), poke the raffle of drain of material funnel into the iron discharge. Then discharge the magnetic material absorbed on the magnetic media relying on the vibrating force.

Electromagnetic dried-powder separators are applied in process the fine mineral particle, the magnetic fine ferrous mineral particle such as hematite, martite, limonite, siderite, chromite, polianite; and also fine nonferrous metals mineral particle, for example wolframite; fine rare earth mineral particle, for example eremite; and fine nonmetallic mineral particle such as feldspar, quartz, kaoli.

eriez - wet drum separators

eriez - wet drum separators

Eriez Drum Separators are setting industry standards. The newest advances in magnetic circuitry design, plus over a quarter of a century of experience with solid/liquid separation, are combined in Eriez Wet Magnetic Drum Separators.

Innovations in both magnetic circuit design and materials of construction are applied to Eriez wet drum magnetic separators. This results in maximum magnetite recovery while operating with a minimum amount of wear and maintenance. Refinements in the magnetic circuit, tank design, and drive system have resulted in further improvements in metallurgical performance and operation.

Wet drums in heavy media applications provide continuous recovery of magnetite or ferrosilicon. Eriez has set the industry standards in the heavy media industry developing both the design criteria of the magnetic circuit and the benchmark of operation. The 750 gauss Interpole magnetic element, developed by Eriez, is the most acclaimed magnet of engineering standards in the industry. Eriez has also set the benchmark for wet drum performance. The culmination of various inplant tests has demonstrated that the separators will achieve magnetite recoveries in the 99.9+ percent. (This is based on magnetite losses of less than 1 gram/gallon of nonmagnetic effluent).

Two basic tank styles are offered. The drum rotates in the same direction as the slurry flow in the concurrent tank style. The slurry enters the feedbox and is channeled underneath the submerged drum. The slurry then flows into the magnetic field generated by the drum. The magnetite is attracted by the magnetic field, collected on the drum surface, and rotated out of the slurry flow. This tank style results in a very clean magnetic product.

The counterrotation tank style is preferred for heavy media applications. The drum rotates against the slurry flow in the counterrotation tank style. The slurry enters the feedbox and flows directly into the magnetic field generated by the drum. The magnetite is attracted by the magnetic field, collected on the drum surface, and rotated out of the slurry flow. Any magnetite that is not immediately collected will pass through to a magnetic scavenging zone. The short path that the magnetic material must be conveyed between the feed entry point and the magnetics discharge lip, combined with the magnetic scavenging zone, results in high magnetite recoveries.

Wet drum magnetic separators are the most vital part of the upgrading process in magnetite concentration. The upgrading of primary magnetite is always accomplished with wet drum separators. Mill feed is typically upgraded to 65+ percent magnetic iron using a series of wet drum magnetic separators. The number of magnetic separation stages required to upgrade the ore is dependent on the magnetite content and the liberation characteristics of the ore.

The Eriez Wet Drum Magnetic Separators is engineered and fabricated to provide reliable operation in demanding applications. The separator is designed for the continuous treatment of coarse milled ore providing a high level of availability. The tank and drum are fabricated from heavy gauge stainless steel with wear plate in impact areas. Wear areas are protected with hot vulcanized rubber. The drum utilizes heavyduty spherical roller bearings with a B10 life of 100,000+ hours. The drive system utilizes a Mill and Chemical Duty motor coupled to a shaft mounted gear reducer complete with Taconite Seals.

The feed enters the separator at the bottom of the tank and the drum rotates in the same direction as the slurry flow. This tank also has a scavenging zone. The nonmagnetics must migrate through the magnetic field to a full width overflow. This design, with the full width overflow, allows the tank to be selfleveling. There are no tailings spigots that must be adjusted to match the flow of the separator feed. This design is most effective for producing a clean magnetite concentrate. The magnetic element should incorporate several agitating magnetic poles to provide a high degree of cleaning. Since the finisher feed consists of fairly well liberated magnetite, extreme magnetic field strengths are not required for collection.

magnetic separation | multotec

magnetic separation | multotec

Multotec supplies a complete range of magnetic separation equipment for separating ferromagnetic and paramagnetic particles from dry solids or slurries, or for removing tramp metal. Multotec Dry and Wet Drum Separators, WHIMS, Demagnetising Coils and Overbelt Magnets are used in mineral processing plants across the world. We can engineer customised magnetic separation solutions for your process, helping you improve the efficiency of downstream processing and lower your overall costs of production.

Multotec provides a wide range of magnetic separators including: Permanent magnet Low Intensity Magnetic Separators (LIMS) or Medium Intensity Magnetic Separators (MIMS) and electromagnetic High Intensity Magnetic Separators (HIMS). Multotec provides unmatched global metallurgical expertise through a worldwide network of branches, which support your processing operation with turnkey magnetic separation solutions, from plant audits and field service to strategic spares for your magnetic separation equipment.

Whether you need to recover fast moving tramp metal, recover valuable metals in waste streams or enhance the beneficiation of ferrous metals, Multotec has the magnetic separator you require. Dry drum cobber magnetic separators provide an initial upgrade of feed material as well as a gangue material rejection stage. By improving the material fed to downstream plant processes, our magnetic separation solutions reduce the mechanical requirements of grinding, ultimately lowering overall costs. Our heavy media drum separators are ideally suited for dense media separation plants. Our ferromagnetic wet drum separators can be used in iron ore separation plants in both rougher or cleaner beneficiation applications. We also provide demagnetising solutions that reverse the residual effects that magnetic separation has on the magnetic viscosity of ferrous slurries, to return the mineral stream to an acceptable viscosity for downstream processing. These demagnetising coils generate a magnetic field that alters magnetic orientation at 200 Hz.

The trend towards larger and faster travelling conveyors in the African mining industry has highlighted the vital role of overbelt magnets. Solutions need to be optimised to such factors as belt speed and width, the belt troughing angle, the burden depth, the material density and bulk density, the expected tramp metal specifications, ambient operating temperatures and suspension height to provide maximum plant and cost efficiency. Multotec can supply complete overbelt magnet systems, from equipment supply to a turnkey service by means of its strategic partners, including even the gantry work.

recycling industries magnetic separation equipment method separation of mixtures

recycling industries magnetic separation equipment method separation of mixtures

Recycling Industries Magnetic Separation Equipment Method Separation Of Mixtures Advantages: Fields to magnetize the collecting elements can be matched to the separation requirements, from about 1 through 20 kilogauss in the empty separating space. Large volumes of magnetized matrix spaces can be generated to meet processing needs. Separating spaces can be filled with a virtually endless variety of matrix elements. The magnetic field can be conveniently turned off to allow easy cleaning of the matrix, making it possible to automate the cleaning cycle. Equipment can be designed to meet unusual processing conditions including high temperature, high pressure and many corrosive products. Equipment is available for use in hazardous environments. Applications: Coal Industries Abrasive Industries Chemical Industries Paper and Pulp Industries Ceramic Industries Rubber Industries Petroleum Industries Animal Feed Industries Recycling Industries Mineral Processing Features: Electromagnetic Separator have a deep penetrating magnetic field. Electromagnetic Separator needs low maintenance and are easy to install and operate. Electromagnetic Separator can function smoothly even in the hazardous environments. No manual cleaning is required and reduces downtime for the end user. Technical parameter: Model 3A160 3A220 7A300 11A220 11A430 15A220 20A600 Magnetic field strength(t) 2 2 3 3 3 5 3 Input voltage(VAC) 380 220 380 380 380 380 380 Maximun output current(A) 15 7 20 20 20 30 40 Maximum coil power(KW) 3 3 7 11 11 15 20 Insulation category E E E E E E E Cooling method water and oil cooling water and oil cooling water and oil cooling water and oil cooling water and oil cooling water and oil cooling water and oil cooling Magnetic lumen diameter(mm) 160 220 300 220 430 220 600 Yield(m3/h) 0.5-1.5 1-3 1.5-4 0.5-3 1.5-6 1-3 3-8 Dimension(mm) 700*700 *1450 860*860 *1540 1320*1320 *2500 1300*110 *1800 1500*1500 *2500 1350*1100 *1850 1500*1500 *2000 Main machine weight(kg) 450 490 1020 1130 1210 1500 2000 Usage 60-300 mesh feedstock of iron elimination

separacion de mezclas magnetic separation equipment for the mining industry

separacion de mezclas magnetic separation equipment for the mining industry

Separacion De Mezclas Magnetic Separation Equipment For The Mining Industry WDY Magnetics is an established manufacturer and supplier of magnetic separators, filters and lifters. For dedicated customer service and top notch quality products, we made a mark in the industry as a manufacturer of superior quality magnetic products. Product characteristic unique magnetic circuit Large wrap angle and multi-magnetic-pole. With the mechanical vibrating equipment Easier to discharge the iron. Operation process Reliable High Tension Separator,Feed the dry powder from the hopper, meanwhile make the separator state at the magnetizing and run a vibrator. After a period ,stop feeding, cut off the magnetic device, run the other vibrator(keep the two vibrator running), poke the raffle of drain of material funnel into the iron discharge. Then discharge the magnetic material absorbed on the magnetic media relying on the vibrating force. Application scope Reliable High Tension Separator are applied in process the fine mineral particle, the magnetic fine ferrous mineral particle such as hematite, martite, limonite, siderite, chromite, polianite; and also fine nonferrous metals mineral particle, for example wolframite; fine rare earth mineral particle, for example eremite; and fine nonmetallic mineral particle such as feldspar, quartz, kaolin. 2.Electromagnetic dried-powder separators are suitable for using at the drought and water shortage area. For example:Kaolin Beneficiation,Sodium potassium feldspar Beneficiation,Quartz Beneficiation ,Polarity powder material Beneficiation ,pharmacy treatment,active pharmaceutical ingredient(API)treatment,antibiotics treatment,paper treatment ,paper pulp treatment,fiber stufftreatment,organicchemicalindustry and related equipment ,Fine chemicals and related equipment. Technical parameter of contrast Model 3A160 3A220 7A300 11A220 11A430 15A220 20A600 Magnetic field strength(t) 2 2 3 3 3 5 3 Input voltage(VAC) 380 220 380 380 380 380 380 Maximun output current(A) 15 7 20 20 20 30 40 Maximum coil power(KW) 3 3 7 11 11 15 20 Insulation category E E E E E E E Cooling method water and oil cooling water and oil cooling water and oil cooling water and oil cooling water and oil cooling water and oil cooling water and oil cooling Magnetic lumen diameter(mm) 160 220 300 220 430 220 600 Yield(m3/h) 0.5-1.5 1-3 1.5-4 0.5-3 1.5-6 1-3 3-8 Dimension(mm) 700*700 *1450 860*860 *1540 1320*1320 *2500 1300*110 *1800 1500*1500 *2500 1350*1100 *1850 1500*1500 *2000 Main machine weight(kg) 450 490 1020 1130 1210 1500 2000 Usage 60-300 mesh feedstock of iron elimination

WDY Magnetics is an established manufacturer and supplier of magnetic separators, filters and lifters. For dedicated customer service and top notch quality products, we made a mark in the industry as a manufacturer of superior quality magnetic products.

Reliable High Tension Separator,Feed the dry powder from the hopper, meanwhile make the separator state at the magnetizing and run a vibrator. After a period ,stop feeding, cut off the magnetic device, run the other vibrator(keep the two vibrator running), poke the raffle of drain of material funnel into the iron discharge. Then discharge the magnetic material absorbed on the magnetic media relying on the vibrating force.

Reliable High Tension Separator are applied in process the fine mineral particle, the magnetic fine ferrous mineral particle such as hematite, martite, limonite, siderite, chromite, polianite; and also fine nonferrous metals mineral particle, for example wolframite; fine rare earth mineral particle, for example eremite; and fine nonmetallic mineral particle such as feldspar, quartz, kaolin. 2.Electromagnetic dried-powder separators are suitable for using at the drought and water shortage area.

For example:Kaolin Beneficiation,Sodium potassium feldspar Beneficiation,Quartz Beneficiation ,Polarity powder material Beneficiation ,pharmacy treatment,active pharmaceutical ingredient(API)treatment,antibiotics treatment,paper treatment ,paper pulp treatment,fiber stufftreatment,organicchemicalindustry and related equipment ,Fine chemicals and related equipment.

dry grinding and magnetic separation equipment iron concentrate powder

dry grinding and magnetic separation equipment iron concentrate powder

Dry Grinding And Magnetic Separation Equipment Iron Concentrate Powder Foshan Wandaye Machinery Company Limited is a national high-tech enterprise,owns a number of invention patents, with research and development production,major products are: magnetic separator for non-metallic mineral raw materials, ceramic glaze, metal, plastics, food and all kinds of industries.The main products are: electromagnetic Slurry separator, electromagnetic powder machine, permanent magnetic separator vertical ring electromagnetic separator,vertical ring permanent magnetic separator and different sizes of magnetic plates, magnetic rod, drawer type magnetic separator etc; Our company possesses professional technical team and sophisticated laboratory,can be customized for magnetic separator. Wandaye Limited since 2014 get involved in domestic and international mineral processing engineering technology and the fields of whole line project design etc . Features 1. Electro-magnetized screens capture fine iron particles in microns. 2. Vibration motor ensures effective flow to the filter screen. 3. Limited amount of roll-in material. Usage 1. Model 3A220is designed to remove fine iron powders from dry powdered materials to get the best results in food, chemical, plastic, ceramic, medical industries and many other. 2. Specific product is designed only to be used for secondary cell battery to handle cathode material and anode material. Electrically conductive materials like lead, copper, zinc, tin, bronze are not used for this case. Specifications 1. Standard high magnetic force (20000 gauss) 2. Additional Maghammer helps better flow rate. 3. Screen pitch can be selected for best results. 4. Controller included Technical parameter Model 3A160 3A220 7A300 11A220 11A430 15A220 20A600 Magnetic field strength(t) 2 2 3 3 3 5 3 Input voltage(VAC) 380 220 380 380 380 380 380 Maximun output current(A) 15 7 20 20 20 30 40 Maximum coil power(KW) 3 3 7 11 11 15 20 Insulation category E E E E E E E Cooling method water and oil cooling water and oil cooling water and oil cooling water and oil cooling water and oil cooling water and oil cooling water and oil cooling Magnetic lumen diameter(mm) 160 220 300 220 430 220 600 Yield(m3/h) 0.5-1.5 1-3 1.5-4 0.5-3 1.5-6 1-3 3-8 Dimension(mm) 700*700 *1450 860*860 *1540 1320*1320 *2500 1300*110 *1800 1500*1500 *2500 1350*1100 *1850 1500*1500 *2000 Main machine weight(kg) 450 490 1020 1130 1210 1500 2000 Usage 60-300 mesh feedstock of iron elimination

Foshan Wandaye Machinery Company Limited is a national high-tech enterprise,owns a number of invention patents, with research and development production,major products are: magnetic separator for non-metallic mineral raw materials, ceramic glaze, metal, plastics, food and all kinds of industries.The main products are: electromagnetic Slurry separator, electromagnetic powder machine, permanent magnetic separator vertical ring electromagnetic separator,vertical ring permanent magnetic separator and different sizes of magnetic plates, magnetic rod, drawer type magnetic separator etc; Our company possesses professional technical team and sophisticated laboratory,can be customized for magnetic separator. Wandaye Limited since 2014 get involved in domestic and international mineral processing engineering technology and the fields of whole line project design etc .

1. Model 3A220is designed to remove fine iron powders from dry powdered materials to get the best results in food, chemical, plastic, ceramic, medical industries and many other. 2. Specific product is designed only to be used for secondary cell battery to handle cathode material and anode material. Electrically conductive materials like lead, copper, zinc, tin, bronze are not used for this case.

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