portable trommel screen - mineral processing

portable trommel screen - mineral processing

Trommel screens are one of the oldest screening devices, their structures are very simple but yet with high sorting accuracy and efficiency. So they are still widely used in China and many other countries.Trommels can be made to deliver several sized products by using trommel screens in series from finest to coarsest such as the one shown; or using concentric trommels with the coarsest mesh being innermost.Trommels remain widely used in some screening duties, including aggregate screening plants and the screening of mill discharge streams. They are also used for wet-scrubbing ores, such as Bauxite, alluvial gold, diamond ores and etc.

Trommels are installed on a small angle to the horizontal or use a series of internal baffles to transport material along with the cylinder.When the feeding material enters the roller trommel, due to the tilt and rotation of the trommel, the material on the screen surface is turned and rolled, so that the qualified material (under-screen product) is discharged through the outlet at the bottom of the rear end of the roller, and the unqualified material (upper-screen product) is discharged through the discharge port at the rear of the trommel.Trommels can handle material from 55 mm down to 6 mm, and even smaller sizes can be handled under wet screening conditions.Although trommels are typically cheaper, vibration-free, and mechanically robust, they generally have lower capacities than vibrating screens since only part of the screen surface is in use at any one time.Trommels remain widely and often work with the screening of mill discharge streams. Tumbling mill (AG, SAG, rod, and ball mills) discharge streams usually pass through a trommel screen attached to the mill outlet to prevent grinding media scats from reaching subsequent processing equipment, and the case of AG/SAG mills, to extract pebbles to send to crushing stage.

The drum body of the drum screen is generally divided into several sections, depending on the specific situation, the screen holes are arranged from small to large, and the screen hole diameter on each section is the same.In order to improve the sorting accuracy and avoid the situation where small particles are screened out in the large-aperture screen section, the feeding materials must be fully turned in the trommel screen, and the movement speed of those materials cannot be too fast.Generally, the inner wall of the trommel is equipped with a flex plate. Its role is to raise the feeding particles so that particles with different sizes get as many opportunities as possible to contact the sieve hole.If the hole diameter meets the requirements, the particles can pass through the sieve and get sorted.Also, the trommel screen generally has a relatively strict installation angle, usually, this angle is 5. Of course, under actual circumstances, it can be adjusted as needed.

The screen hole is not easy to be blocked, the operation is stable, and the operation produced noise is low.Simple structure and easy to maintain.The sieving cylinder can be closed, which is easy to collect dust.A higher screening efficiency and longer service life can achieved by adapting a special screen.High screening efficiency.Good working environment.Low equipment noise.

The entire screening is designed in a sealed dust cover, which eliminates the flying dust during the screening process, thereby improving the working environment.The entire screening is designed in a sealed dust cover, which eliminates the flying dust during the screening process, thereby improving the working environment.During the operation of the equipment, the noise generated by the material and the rotating screen is completely isolated by the sealed dust cover, so that the noise cannot be transmitted to the outside of the equipment, thereby reducing the noise of the equipment.

mineral sizers,twin shaft mineral sizers, double roll mineral sizershenan excellent machinery co.,ltd

mineral sizers,twin shaft mineral sizers, double roll mineral sizershenan excellent machinery co.,ltd

Project name: Open-pit mine lignite integrated crushing station Material to be crushed: Lignite Crushing capacity: 2,000t/h Feed size: Up to 1,200mm Product size: 300mm Sizer model: 2PLF1200/2500 Sizer drive: 2X315kw Customer name: Xinjiang Zhongtai Chemical Co., Ltd

Project name: 6 million tons/year fine sand aggregate production line Material to be crushed: Limestone Crushing capacity: 2,500t/h Feed size: Up to 1,300mm Product size:350mm Sizer model: 2PLF1500/3000 Sizer drive: 2X400kw Customer name: Zhashui county Rundong Building Materials Co.,Ltd

1.Which material to be crushed:______ 2.Handling capacity:______t/h. 3.Bulk material density: ______t/m3 4.The material compressive strength:______Mpa 5.The material HGI (hardgrove grindability index) range: 6. Material particle distribution percentage 7.Max. grain size of the feeding material: ______mm 8. What is the grain size of the finished product after crushing? 9.What equipment is used to feed the material into the sizer? 10.What equipment is used to discharge the material from the sizer? 11.As we know,the sizer should form a system with other equipment, do you have reliminary design or hand-drawn sketch? If have, please send it to our engineer for reference.

rotary trommel scrubber to wash nickel ore or bauxite ore

rotary trommel scrubber to wash nickel ore or bauxite ore

Rotary trommel scrubber , also known as drum washer, is one kind of heavy mineral washing machine, often used for clean the mineral for removing the clay or pebbles. Rotary trommel scrubber is generally consist of two part, namely scrub part and screen part, for large heavy model, also use two - stage scrubbing, two - stage screening structure.

When the material is fed into the scrubber, it will be flushed by the high-pressure water spray, then fully soaked in the slurry section, to make the clay soft and separate from mineral; during the rotation of drum, the minerals keep rolling and rubbing each other, thus strengthening the washing function and making the mineral surface cleaner. The cleaned material is discharged by the screen part, then divided into different size. Then complete the washing job.

In the application of rotary trommel scrubber, the washing purpose is vary with different minerals. For example, to process bauxite ,the cleaned mineral is obtained and remove the clay; to process nickel laterite ore, the gravel in the silt will be cleaned and removed.

In the ore washing , two stage washing process is generally adopted to meet the requirements of the downstream process. The rotary trommel scrubber is widely used as the first-stage washing machine, it should do two things in this process: one is separate the small size ore which is below 50mm or 20mm to the second-stage washing process as soon as possible; the other is keep the enough washing time for the big size mineral or waste rock, so as to clean the big mineral or waste rock fully

mining screens - aqseptence group

mining screens - aqseptence group

Airvac vacuum sewers are a cost-effective, environmentally friendly alternative to traditional gravity and pressure sewer systems providing low maintenance, efficient and reliable sewage collection. Airvac is considered to be the industry standard as both the U.S. EPA and the Water Environment Federation featured Airvac in their published technical manuals. Learn more

With our brand Diemme Filtration we are one of the leading specialists in solid/liquid separation for industrial processes and offer the widest range of filter presses currently available in the global market. Learn more

The Geiger brand is a leading provider of water intake systems for power plants, desalination, irrigation, water plants and other industrial applications. Geiger was founded by Carl Geiger in Karlsruhe in 1891. Learn more

Johnson Screens with its trade mark Vee-Wire is the leading brand for screens in industrial filters, water well and architecture. In 1904, Edward E. Johnson founded Johnson Screens after developing worlds first continuous slot wire wrapped screen to be used in a water well. Learn more

Noggerath is a well-known brand in the field of water and waste water treatment which provides a broad product and solution portfolio for municipal and industrial applications, such as headworks systems, fine and micro screening systems, pumps and services around our products including spare parts support. Learn more

Passavant is a well-recognized brand in the field of water and waste water treatment which provides a broad product and solution portfolio for municipal and industrial applications. Such as headworks systems, sludge treatment, filtration and related services. Learn more

Roediger Sewerage Systems proven technologies for conveying wastewater and innovative solutions for modern supply and disposal systems. As a system supplier Roediger is one of the worlds leading brands in the field of vacuum technology, the brand name Roediger stands for quality and customized solutions. Learn more

Along with in-house product innovation, "Fit for Duty" material selection and mineral sizing, cleaning, and de-watering know-how; we are well positioned to offer you a comprehensive range of mining screen systems to add value to your mineral beneficiation processes, in coal, iron ore, gold, copper, phosphate, lead, zinc, bauxite, sand, gravel and many more.

Johnson Screens has developed world class proprietary stainless steel Vee-Wire and Polyurethane manufacturing processes. With a century of design innovation, industry experience and technology know-how behind the Brand; Johnson Screens have the in-house capabilities to optimise your mineral beneficiation processes.

Our mining screen systems are simple, tough and effective, designed to maximise production yield and maintenance efficiency. Our panel designs include a variety of aperture and fixing systems, available in Vee-Wire, Polyurethane, Perforated Plate and/or Rubber.

Johnson Screensis the leading manufacture of screens in industrial filters, water well, architectural elements and the oil and gas market. In 1904, Edward E. Johnson founded Johnson Screens after developing the worlds first continuous slot wire wrapped screen to be used in a water well.

Sales and Manufacturing Location 88 Brickyard Road, Geebung 4034 QLD PO Box 85, Virginia DC, QLD 4014 Australia Phone: +61 7 3867 5555 Fax: +61 7 3867 5566 [email protected]

vibra-snap screen - action vibratory conveyors

vibra-snap screen - action vibratory conveyors

The VIBRA-SNAP Screen is an effective alternative to rigid screening systems for processing materials with inherent blinding characteristics and is ideally suited for efficient screening of moist, sticky, fibrous, wet bulk materials with a high percentage of fines or near size particles. Common applications include glass, e-scrap, compost, construction and demolition fines, coal, auto shredder residue (ASR) as well as a long list of minerals and aggregates. The VIBRA-SNAP Screen was engineered, over a decade ago, with the user in mind and a long list of deficiencies common to other flip-flow screens was eliminated. The VIBRA-SNAP Screen utilizes oversized components and proprietary design features to reduce wear, minimize maintenance, and increase screening efficiency. Since a machine is only as good as the parts that link it together we encourage careful consideration of the details. We think you will agree that the VIBRA-SNAP Screen is unmatched in the flip-flow screen marketplace. US Pat. 7,344,032 / US Pat. 7,654,394 / US Pat. 8,757,392 / CDN Pat. 2,569,471 / CDN Pat. 2,802,930 / CH Pat. ZL 2012800578237 / EPC 1765524 / Pat. Pend.

Hover over features to see descriptions Removable HoodingFlexible or rigid hooding for material and dust containment are common with optional ports for dust evacuation. Reinforced Load PlateVIBRA-SNAP Screens are normally fed directly with a belt conveyor. This heavy duty solid steel formed section is capable of handling impacting loads and is bolted for ease of replacement. Vibration IsolationIsolation springs minimize the transfer of dynamic loads to support structures and foundations. Screen Mat Side Sealing Screen mat side sealing prevents material leakage, screen mat edge wear, and mixing of oversize particles with the screened fraction. The active side curvature flips material towards the unit center and away from the side sealing area. Screen Mat Material Resilient VIBRA-SNAP Screen mats are formulated from a high-grade polyurethane elastomer with exceptional abrasion and flex fatigue resistance for long life. Screen Mat ConstructionPrecision molded screen mats with maximized open area are configured to suit the application. VIBRA-SNAP Screen mats are unitary and without seams or glued joints. Aperture widths are available starting at .3mm. Corrosion EliminationThe patented all-polyurethane connection system provides long life and is especially useful for damp and corrosive environments. Rubber Shear ElementSpecially compounded elastomeric elements with generous cross section operate at low stress levels for long life. Sympathetic BalancerOften referred to as the second moving mass, the independent balancer moves oppositely to the main frame to minimize the transfer of dynamic loads and provide for the alternatively tensioning and relaxing of flexible screen mats. Energy Efficient Centrifugal DriveA pair of adjustable flywheels imparts a force to the main frame of the VIBRA-SNAP Screen. Only the screen mats and materials to be processed are subjected to higher accelerations.

Reinforced Load PlateVIBRA-SNAP Screens are normally fed directly with a belt conveyor. This heavy duty solid steel formed section is capable of handling impacting loads and is bolted for ease of replacement.

Screen Mat Side Sealing Screen mat side sealing prevents material leakage, screen mat edge wear, and mixing of oversize particles with the screened fraction. The active side curvature flips material towards the unit center and away from the side sealing area.

Screen Mat ConstructionPrecision molded screen mats with maximized open area are configured to suit the application. VIBRA-SNAP Screen mats are unitary and without seams or glued joints. Aperture widths are available starting at .3mm.

Sympathetic BalancerOften referred to as the second moving mass, the independent balancer moves oppositely to the main frame to minimize the transfer of dynamic loads and provide for the alternatively tensioning and relaxing of flexible screen mats.

Energy Efficient Centrifugal DriveA pair of adjustable flywheels imparts a force to the main frame of the VIBRA-SNAP Screen. Only the screen mats and materials to be processed are subjected to higher accelerations.

VIBRA-SNAP Screen for Bio-Solids View Picture VIBRA-SNAP Screen for Compost View Picture VIBRA-SNAP Screen for Aggregate View Picture VIBRA-SNAP Screen for Auto Shredder Residue (ASR) View Picture VIBRA-SNAP Screen for C&D Material View Picture Back to back VIBRA-SNAP Screens for ASR View Picture Double Deck VIBRA-SNAP Screen for C&D Material View Picture Double Deck VIBRA-SNAP Screen for C&D Material View Picture VIBRA-SNAP Screen for Mixed Waste View Picture VIBRA-SNAP Screen for De-Watering and Coarse Debris Removable View Picture VIBRA-SNAP Screen for Light Industrial Waste View Picture VIBRA-SNAP Screen for Aggregates View Picture

multotec is the global leader in trommel screen design & manufacture

multotec is the global leader in trommel screen design & manufacture

Multotec is the global leader in trommel screen design and manufacture and has been supplying the market for more than 20 years, screening product manager Anthony Yell asserts. We deal with most of the major mill manufacturers globally. It is a highly specialised segment that was developed in South Africa and Multotec has built a reputation that now enables us to supply internationally. Multotec has manufacturing plants in South Africa and Chile and can also supply spare parts from Australia, Chile and the US, which reduces the supply chain dramatically and extends its geographic footprint. We have suppliedmill and scrubber trommel screensto the four corners of the earth, from South America to Papua New Guinea and Siberia to Kazakhstan. There are not many places where they are not prevalent as the Multotec product has proved to be highly reliable. Yell explains that mill and scrubber trommel screens fit onto the end of a grinding mill or a scrubber by means of a bolt on flange. Sizes range from 950 mm by 1 200 mm up to a massive 6 m by 6 m. Mill trommel screens are supplied typically into the platinum, gold and copper sectors while scrubber trommel screens are being supplied mainly into the diamond sector. Self driven trommel screens have their own drive arrangement and are supplied mainly into the heavy mineral sands sector to remove organic material from beach sand, for example, as well as to water treatment plants and coal briquetting plants. Self driven trommel screens are supported on both ends, sitting on a machine tyre and with rollers at the bottom. They are driven through the discharge end by either electric or hydraulic drive. The latter has proved to be very reliable and allows for the flexibility of full variable speed, Yell says. Trommel screens are designed using software such asFinite Element Analysis (FEA)in order to calculate the stresses in the structure for a full rotation. These stresses must be under the maximum permissible level in order to optimise the fatigue life. Mill and scrubber trommel screens have a design life in excess of five years while self driven trommel screens have a design life of ten years. Yell explains that BS 7608:1993 for Fatigue Design Assessment of Steel Structures is adhered to in the design process. Self driven trommel screens are also designed by means of FEA and can also be supplied with a feed and discharge arrangement in accordance with specific customer requirements, Yell says. FEA is also used to calculate the requirement for special cross bracing to counter torsional twisting. When the mill or scrubber starts up, the trommel wants to turn in the opposite direction for a split second. If the trommel is not braced sufficiently, torsional twisting will occur, which will weaken the trommel structure and ultimately lead to premature failure. In addition, the load in a trommel is shifting continuously, placing ongoing stress on the trommel, which complicates the structure, Yell says. It is such complexity that means that every single trommel screen is unique. Multotec custom designs each product to suit the specific application. We size it; we check the load; we examine the material lump size. When a client requests a trommel screen, our first step is to determine the main parameters. There may be a lot of variation in the diameter of the bolt on flange diameter, for example, as it depends on the size of the mill. Thus there is not a standard range apart from the basic design parameters that we use. Such is Multotecs experience in this regard that it prides itself on its ability to turn customer quotes around in 24 hours. We use sophisticated programmes to design the equipment needed, taking into account the basic FEA requirements at tender stage, whereupon an accurate drawing, price and quote can be generated. The speed and efficiency with which we can respond to a customers enquiry put us streets ahead of the rest of the market. Yell says the key to the success of Multotecs trommel screens lies in maintaining the integrity of the rubber lining through regular maintenance. Trommel screens are generally rubber lined. It is critical to ensure the integrity of that rubber lining. If it wears out it needs to be repaired, as a trommel screen can fail prematurely if its structure is eroded. The rubber lining protects the trommel screen from corrosion and wear and is fundamental to an extended trommel life. If they are maintained properly, trommel screens will last for many years. We have had trommel screens running for over ten years that are still operational, Yell says. Customers can return trommel screens in order for the rubber lining to be stripped off and the structure subjected to non-destructive testing to determine the integrity of the trommel structure. If it is still within specification it can be shot blasted and relined, whereupon it will be good to go for many more years, Yell says. Multotec has the added advantage of being able to supply polyurethane panels for smaller feed sizes where the main wear criteria is sliding abrasion and rubber panels where impact is the wear criteria. We design and manufacture both rubber and polyurethane panels in house, Yell says. He adds that a recent trend in mineral processing has been that mills are tending to get bigger and therefore trommel screens are becoming larger as well. This can pose challenges in terms of acceptable life of screen media. However, we do have solutions for this, Yell says. Mill manufacturers often increase throughputs by accelerating the discharge rate out of mills by using so called pulp lifters, which function a bit like a pump impeller to propel the material out of the mill at a higher velocity. The trommel design implication is that we need to stop the feed landing half way down the trommel screen as this reduces trommel efficiency and causes high wear to the screen media. In order to combat this we have designed what we call a baffle plate placed at the feed end of the trommel that forces the feed down onto the trommel surface to improve screening efficiency, Yell says. If the trommel screen rotates in one direction only, we recommend installing an advancing spiral or scroll in order to be able to control the retention time of the material in the trommel. The scroll pitch can be designed to increase or reduce the retention time accordingly. Furthermore single or twin start scrolls can be used to further vary the retention time and improve screening efficiency when required. There is a great deal that can be done to optimise output, Yell comments. One of the biggest problems we have today with the larger trommel screens is the high wear rates of the screen media due to the high peripheral speed of the trommel screen itself. In addition, the trend towards larger mills means higher flow rates and velocities. Double the velocity on a polyurethane screen equates to an increase in the wear rate by a factor of five, Yell notes. We have invested extensive research and development into producing panels that last longer, as with large copper processing plants where the large tonnages mean an average run time of 12 to 14 weeks without any stoppages for panel change outs. It has been our objective to develop panels that can last that length of time, Yell says. This usually requires that trommel screen panels become bigger and heavier. On the smaller trommel screens we use modular injection moulded panels of 305 mm by 305 mm up to around 2.5 m in diameter. For sizes above that it is more cost effective to manufacture larger panels in either rubber or polyurethane. The challenge is manufacturing panels that are not too large or too heavy for two people to lift and install. Otherwise specialised lifting equipment is required which then complicates the re-lining procedure. From a safety perspective, Yell notes that all the panels are fastened from inside the trommel screen. Everything is installed and replaced from inside the trommel generally by use of polyurethane pins and sleeves. Our solutions mean that that the panels are easy to remove and replace safely, Yell says. Another issue related to panel wear is pebble porting in semi autogenous (SAG) milling, which sometimes results in hard rounded pebbles that cannot be economically ground down any further being ejected from the mill and sent to secondary crushing. These rounded pebbles, with diameters from 50 mm to 80 mm, can account for up to 20% of the trommel feed needed to be screened out by the trommel screen. They tend to be abrasive and cause excessive panel wear. Multotec has developed a range of panels that can handle these pebbles and still achieve acceptable life, Yell says. The most important factor for us is understanding the trommel duty and the load coming off the end, because we have to design the front end of the trommel to be able to take this load. Yell points out. We have focused investment in developing designs for many years and our trommel screen designs have proven themselves to be exceptionally reliable, Yell says. As long as they are maintained properly in terms of the rubber lining and panel replacement then they will last a long time.

Multotec is the global leader in trommel screen design and manufacture and has been supplying the market for more than 20 years, screening product manager Anthony Yell asserts. We deal with most of the major mill manufacturers globally. It is a highly specialised segment that was developed in South Africa and Multotec has built a reputation that now enables us to supply internationally.

Multotec has manufacturing plants in South Africa and Chile and can also supply spare parts from Australia, Chile and the US, which reduces the supply chain dramatically and extends its geographic footprint. We have suppliedmill and scrubber trommel screensto the four corners of the earth, from South America to Papua New Guinea and Siberia to Kazakhstan. There are not many places where they are not prevalent as the Multotec product has proved to be highly reliable.

Yell explains that mill and scrubber trommel screens fit onto the end of a grinding mill or a scrubber by means of a bolt on flange. Sizes range from 950 mm by 1 200 mm up to a massive 6 m by 6 m. Mill trommel screens are supplied typically into the platinum, gold and copper sectors while scrubber trommel screens are being supplied mainly into the diamond sector.

Self driven trommel screens have their own drive arrangement and are supplied mainly into the heavy mineral sands sector to remove organic material from beach sand, for example, as well as to water treatment plants and coal briquetting plants. Self driven trommel screens are supported on both ends, sitting on a machine tyre and with rollers at the bottom. They are driven through the discharge end by either electric or hydraulic drive. The latter has proved to be very reliable and allows for the flexibility of full variable speed, Yell says.

Trommel screens are designed using software such asFinite Element Analysis (FEA)in order to calculate the stresses in the structure for a full rotation. These stresses must be under the maximum permissible level in order to optimise the fatigue life. Mill and scrubber trommel screens have a design life in excess of five years while self driven trommel screens have a design life of ten years. Yell explains that BS 7608:1993 for Fatigue Design Assessment of Steel Structures is adhered to in the design process. Self driven trommel screens are also designed by means of FEA and can also be supplied with a feed and discharge arrangement in accordance with specific customer requirements, Yell says.

FEA is also used to calculate the requirement for special cross bracing to counter torsional twisting. When the mill or scrubber starts up, the trommel wants to turn in the opposite direction for a split second. If the trommel is not braced sufficiently, torsional twisting will occur, which will weaken the trommel structure and ultimately lead to premature failure. In addition, the load in a trommel is shifting continuously, placing ongoing stress on the trommel, which complicates the structure, Yell says. It is such complexity that means that every single trommel screen is unique.

Multotec custom designs each product to suit the specific application. We size it; we check the load; we examine the material lump size. When a client requests a trommel screen, our first step is to determine the main parameters. There may be a lot of variation in the diameter of the bolt on flange diameter, for example, as it depends on the size of the mill. Thus there is not a standard range apart from the basic design parameters that we use.

Such is Multotecs experience in this regard that it prides itself on its ability to turn customer quotes around in 24 hours. We use sophisticated programmes to design the equipment needed, taking into account the basic FEA requirements at tender stage, whereupon an accurate drawing, price and quote can be generated. The speed and efficiency with which we can respond to a customers enquiry put us streets ahead of the rest of the market.

Yell says the key to the success of Multotecs trommel screens lies in maintaining the integrity of the rubber lining through regular maintenance. Trommel screens are generally rubber lined. It is critical to ensure the integrity of that rubber lining. If it wears out it needs to be repaired, as a trommel screen can fail prematurely if its structure is eroded. The rubber lining protects the trommel screen from corrosion and wear and is fundamental to an extended trommel life.

If they are maintained properly, trommel screens will last for many years. We have had trommel screens running for over ten years that are still operational, Yell says. Customers can return trommel screens in order for the rubber lining to be stripped off and the structure subjected to non-destructive testing to determine the integrity of the trommel structure. If it is still within specification it can be shot blasted and relined, whereupon it will be good to go for many more years, Yell says.

Multotec has the added advantage of being able to supply polyurethane panels for smaller feed sizes where the main wear criteria is sliding abrasion and rubber panels where impact is the wear criteria. We design and manufacture both rubber and polyurethane panels in house, Yell says. He adds that a recent trend in mineral processing has been that mills are tending to get bigger and therefore trommel screens are becoming larger as well. This can pose challenges in terms of acceptable life of screen media. However, we do have solutions for this, Yell says.

Mill manufacturers often increase throughputs by accelerating the discharge rate out of mills by using so called pulp lifters, which function a bit like a pump impeller to propel the material out of the mill at a higher velocity. The trommel design implication is that we need to stop the feed landing half way down the trommel screen as this reduces trommel efficiency and causes high wear to the screen media. In order to combat this we have designed what we call a baffle plate placed at the feed end of the trommel that forces the feed down onto the trommel surface to improve screening efficiency, Yell says.

If the trommel screen rotates in one direction only, we recommend installing an advancing spiral or scroll in order to be able to control the retention time of the material in the trommel. The scroll pitch can be designed to increase or reduce the retention time accordingly. Furthermore single or twin start scrolls can be used to further vary the retention time and improve screening efficiency when required. There is a great deal that can be done to optimise output, Yell comments.

One of the biggest problems we have today with the larger trommel screens is the high wear rates of the screen media due to the high peripheral speed of the trommel screen itself. In addition, the trend towards larger mills means higher flow rates and velocities. Double the velocity on a polyurethane screen equates to an increase in the wear rate by a factor of five, Yell notes.

We have invested extensive research and development into producing panels that last longer, as with large copper processing plants where the large tonnages mean an average run time of 12 to 14 weeks without any stoppages for panel change outs. It has been our objective to develop panels that can last that length of time, Yell says.

This usually requires that trommel screen panels become bigger and heavier. On the smaller trommel screens we use modular injection moulded panels of 305 mm by 305 mm up to around 2.5 m in diameter. For sizes above that it is more cost effective to manufacture larger panels in either rubber or polyurethane. The challenge is manufacturing panels that are not too large or too heavy for two people to lift and install. Otherwise specialised lifting equipment is required which then complicates the re-lining procedure.

From a safety perspective, Yell notes that all the panels are fastened from inside the trommel screen. Everything is installed and replaced from inside the trommel generally by use of polyurethane pins and sleeves. Our solutions mean that that the panels are easy to remove and replace safely, Yell says.

Another issue related to panel wear is pebble porting in semi autogenous (SAG) milling, which sometimes results in hard rounded pebbles that cannot be economically ground down any further being ejected from the mill and sent to secondary crushing. These rounded pebbles, with diameters from 50 mm to 80 mm, can account for up to 20% of the trommel feed needed to be screened out by the trommel screen. They tend to be abrasive and cause excessive panel wear. Multotec has developed a range of panels that can handle these pebbles and still achieve acceptable life, Yell says.

The most important factor for us is understanding the trommel duty and the load coming off the end, because we have to design the front end of the trommel to be able to take this load. Yell points out. We have focused investment in developing designs for many years and our trommel screen designs have proven themselves to be exceptionally reliable, Yell says. As long as they are maintained properly in terms of the rubber lining and panel replacement then they will last a long time.

large capacity nickel rotary trommel drum screen - mining & construction solutions from henan dewo machinery

large capacity nickel rotary trommel drum screen - mining & construction solutions from henan dewo machinery

Dewo machinery can provides complete set of crushing and screening line, including Hydraulic Cone Crusher, Jaw Crusher, Impact Crusher, Vertical Shaft Impact Crusher (Sand Making Machine), fixed and movable rock crushing line, but also provides turnkey project for cement production line, ore beneficiation production line and drying production line. Dewo Machinery can provide high quality products, as well as customized optimized technical proposal and one station after- sales service.

TROMMEL SCREENS. Trommels are mechanical screening machines, trommel screens are used to separate materials. They are often used in mineral and solid-waste processing industries. Additionally, they are used to remove fines from a given waste stream. A trommel consists of a wedge wire cylindrical drum that is usually elevated at an angle at the ...

2.Introduction of Trommel screen separator: Trommel Screen is lifted up by the rotation and aerated as it falls back down. This action is repeated with each revolution along the length of the drum. The finer material passes through the screen openings while the larger material tumbles towards its eventual exit at the rear of the drum.

Orient Nickel Screen (Group), dealing with rotary nickel screen since 1989. With more than 10000m2 production base, is the leading nickel screen maker and exporter in China. With the technology from Europe, original additives imported from USA, key important equipment imported from Germany, Orient Nickel Screen can provide the best printing ...

Potash Trommel Screen, Trommel Screen, Drum Screen manufacturer / supplier in China, offering Wear-Resistant Trommel Screen Large Capacity 100 T/H, Factory Direct Price Portable Circular Vibration Screen 50tph, Screw Ore Washing Machine for Wash Away The Mud on Stone and so on.

Our Trommels can produce from 2 to 7 different clean product sizes depending upon the configuration of the Trommel Screen. New or old, we can keep your Trommel Screen running at full production. We keep a large list of parts in stock. We are able to service your Trommel Screen and refurbish certain parts or the whole plant.

2015 Hot Selling New Design Rotary Drum Screen, Trommel Screen welcome. 1. Product Overview. This series of Trommel Screen are always used in processing minerals such as ferrous metals including hematite & magnetite And nonferrous metals including Lead, Zinc, Gold and Silver etc.

The 512A Trommel provides McCloskey Internationals customers with the functionality of our highly successful screener line-up with an extended conveyor. The 512 trommels are best suited for mid-size operations requiring portability and proven screening performance. As the top selling mid-size portable trommel in North America, the 512A offers a combination of high production rates ...

Rotary trommel scrubber , also known as drum washer, is one kind of heavy mineral washing machine, often used for clean the mineral for removing the clay or pebbles. Rotary trommel scrubber is generally consist of two part, namely scrub part and screen part, for large heavy model, also use two - stage scrubbing, two - stage screening structure.

Drum Cleaning Cleaning requirements with square holes will be more than for round holes due to the extra grab of the hole on the materail in the trommel. Wear Protection Bars are used to protect the drum from damage from large abrasive material ie concrete.

High-quality garbage rotary separator. The trommel screen, also known as a rotary screen or drum screen, it is a mechanical screening device used to separate materials like soil, mulch, and sand ore, coal, gravel, etc., mainly in the mineral and solid-waste processing industries.. It's designed to minimize setup time and be easy and convenient to service.

Standard rotary drum screens are mainly used for: sieving of refractory materials, screening of pulverized coal, screening of river sand, screening of non-ferrous metals, etc. It has the advantages of closed dust collection, small maintenance cost, simple maintenance, convenient screen replacement, and long service life of the screen.

High Capacity Rotary Drum Screen Trommel Filter This is a wonderful Garden Mirror Polished Stainless Steel Sculpture decorated in Minnesota Golf, America. It is designed into mushroom shape that is with high gloss.

Aggregate washing equipment, aggregate trommel for sale. Aggregate wash plants product name: GT series rotary drum screen, trommel screen Feed size: 40mm Processing capacity: 30-3000 tons / hour Screen size: 5-15mm Usage scenario: It is mainly used for dehydration of metal tailings such as iron ore, copper ore, gold ore and aluminum ore.

Features. Diameter: 3 15 (1 4.6m) Capacity: 1 TPH 200 TPH (1 MTPH 181 MTPH+) Specially designed lifting flights to maximize heat transfer between the material and hot gas stream; Heavy duty design and construction for many years of service

Dewo machinery can provides complete set of crushing and screening line, including Hydraulic Cone Crusher, Jaw Crusher, Impact Crusher, Vertical Shaft Impact Crusher (Sand Making Machine), fixed and movable rock crushing line, but also provides turnkey project for cement production line, ore beneficiation production line and drying production line.

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