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magnetic separator in mining

magnetic separation in the mining industry - mainland machinery

magnetic separation in the mining industry - mainland machinery

One of the greatest challenges facing the mining industry is the separation of unwanted material generated by the extraction process from the valuable material. Mining, whether done through open seam or underground means, creates a huge amount of waste product in the form of worthless or low value minerals and unusable man-made materials. These materials can be extremely difficult to separate from the valuable materials miners are after. Perhaps the most efficient way of separating these materials is through magnetic separation.

Magnetic separation machines consist of a vibratory feeding mechanism, an upper and lower belt and a magnet. The bulk material is fed through the vibrating mechanism onto the lower belt. At this point, the magnet pulls any material susceptible to magnetic attraction onto the upper belt, effectively separating the unwanted metals from the rest of the bulk.

Magnetic separation has been used in the mining industry for more than 100 years, beginning with John Wetherills Wetherill Magnetic Separator, which was used in England in the late nineteenth century.

Magnetic separation is most commonly used in the mining industry to separate tramp ore, or unwanted waste metals, from the rest of the bulk material. Tramp ore typically consists of the man-made byproducts created by the mining process itself, such as wires from explosive charges, nuts and bolts, nails, broken pieces from hand tools such as jack hammers and drills or tips off of heavy duty extraction buckets.

Magnetic separation machines are usually placed at the beginning of a mines materials processing line to remove tramp ore before it can cause harm to downstream equipment such as ore crushers and conveyor belts, which can be easily damaged by metal shards or other sharp objects.

The type of magnetic separator used by a mine depends on what material they are extracting and how much tramp ore is generated by their process. As a result, separators of different magnetic flux, or power, can be used. There are 2 types of magnetic separators; electromagnetic and permanent.

Electromagnetic separators generate a magnetic field by switching power from alternating current to direct current. Electromagnetic separators are useful for removing large pieces of tramp ore from the bulk material. These separators are typically suspended over a conveyor belt and draw the unwanted material upward. Electromagnetic separators are easy to clean as removing the tramp ore that they separate from the bulk is as simple as turning off the power that creates their magnetic field.

Permanent magnets consist of materials that generate their own magnetic field. Though not as powerful as electromagnetic separators, permanent magnets are better at attracting strongly magnetized materials such as nickel, cobalt, iron and some rare earth metals. Some permanent magnets are now being made with rare earth metals that have the ability to attract even stainless steel, which is typically not susceptible to magnetic pull. In order to clean permanent magnets, a stainless steel scraper must be used to remove any metal parts from the magnets surface.

Magnetic separation definitely is one of the most important parts of this process. I think magnetic separators are often taken for granted when it comes to processing, whether that processing is in mining or in food processing. Many people dont even know the work that goes into making food safe or mining materials pure.

magnetic separator, mining machine supplier - walker mining

magnetic separator, mining machine supplier - walker mining

Product Introduction Magnetic separator is one of the most widely used and versatile machines in the industry. It is suitable for the separation of magnetic substances with different magnetic properties. It is widely used in resource recovery, mining, timber, kiln, chemistry, food and other industries. For mining industry, the magnetic separator is suitable for wet or dry magnetic separation of manganese ore, magnetite, pyrrhotite, roasted ore, ilmenite, hematite limonite and other materials with particle size less than 2-3mm. It is also used for iron removal of coal, non-metallic ore, building materials and other materials.

Classification Type of magnet: Permanent magnetic separator , electromagnetic iron separator Drying and wetting of ore: Dry magnetic separator, wet magnetic separator Magnetic system: Drum magnetic separator, roller magnetic separator, drum roller magnetic separator, flat plate magnetic separator. Classification of magnetic system: Open magnetic separator, closed magnetic separator Number of magnetic system: Single drum magnetic separator, double drum magnetic separator, combined multi drum magnetic separator. Classification of feeding mode: Upper feeding magnetic separator, lower feeding magnetic separator. Classification of magnetic field intensity: Low intensity magnetic separator, medium intensity magnetic separator, high intensity magnetic separator. Different structure of the tank: downstream, countercurrent and semi countercurrent. The particle sizes of three different types of magnetic separators are as follows: downstream tank 6 mm, countercurrent tank 1.5 mm and semi countercurrent tank 0.5 mm.

The downstream magnetic separator has large processing capacity. It is suitable for roughing and cleaning of strong magnetic materials with coarser particle size. It can also work in series. When the feed volume of the downstream magnetic separator is large, the magnetic particles are easy to lose in the tailings, so the operation management should be strengthened to control the lower pulp level.

Countercurrent magnetic separator is suitable for roughing and scavenging of fine strong magnetic minerals with high recovery but low concentrate grade. Because the coarse-grained materials are easy to deposit and block the separation space, the counter current magnetic separator is not suitable for processing coarse-grained materials.

Semi countercurrent magnetic separator can obtain high quality iron concentrate and good recovery, so semi countercurrent magnetic separator is widely used in production practice. It is suitable for the roughing and cleaning of ore particles less than 0.5mm. It can also be used in series or parallel to realize multiple sweeping and cleaning.

Our Magnetic Separators We have a lot of magnetic separation equipments. Mainly introduce 3 types: wet drum magnetic separators, high intensity magnetic separators and 3 PCS disk dry magnetic separators.

High Intensity Magnetic Separators: High intensity magnetic separator is a kind of high intensity magnetic separation equipment for separating weak magnetic minerals. It is also called super strong magnetic separator. It can be divided into dry and wet separator. It is a general term for magnetic separators with magnetic field of 10000-16000gs or more.

3 PCS Disk Dry Magnetic Separators: The three disc dry magnetic separator is suitable for separation of mixed ores of various magnetic minerals. It is mainly used for dry selection of titanium, rare earth, tungsten tin, chromite, niobium tantalum, limonite, zircon, rutile, solitary residence and so on.

Magnetic separator is mainly used to select wet weak magnetic field and remove the strongly magnetic minerals of fine grains. They are widely used in mineral processing industry, coal washing industry, chemical industry, etc, e.g. recycle heavy formulas such as magnetic heavy media during heavy media separation, concentrate low-concentration slurry in iron ore and gather magnetic steel minerals, treat ore feeding from high-intensity magnetic separators, remove magnetic or weakly magnetic ores and coenobium, as well as prevent blockage of magnetic media.

Magnetic separator can be divided into two kind : roller magnetic separator and cylinder magnetic separator. cylinder type magnetic separator whose diameter is less than 500mm, the magnetic intensity can made from 800 gauss to 9500 gauss. cylinder type magnetic separator whose diametere is from 500mm to 1200mm,the max magnetic intensity is 5000 gauss. the diameter size of roller type can made from 100mm to 600mmm. the max Magnetic strength available is : 16000 gauss the diameter size of roller type separator is : 100-140-160-180-220-240-300-320-380 the magnetic strenth of roller type is among 8000 gauss and 16000 gauss

The diameter and length of the magnet roller are customer-made. In fact, the use of the effect is generally more than 150 will be better The larger the magnet, the higher the throughput The longer the length, the greater the handling capacity, this is customized according to customer requirements. The thickness of our magnetic block is 25mm, is a circular disk Disk and disk have gaps About 3-4mm gap

1. what is the mineral to process ? 2. adopt wet type separating or dry type ? 3. the feeding size of the mineral ? 4. what is the grade of the raw ore and how much grade required after processing ? 5. what is the gauss (magnetic intensity ) required for the magnetic separator ? 6. what is processing capacity ?

high intensity magnetic separators | precise accurate separation | dove

high intensity magnetic separators | precise accurate separation | dove

DOVE High Intensity Disc Electro Magnetic Separators are the most advance Electro Magnetic disc separators in the industry and are designed for separation of dry granular mixtures of magnetic minerals from non-magnetic, as well as elective separation of one weakly magnetic mineral from another.

DOVE High Intensity Disc Magnetic Separators are able to do the separation of up to 6 minerals of different magnetic susceptibilities in one single pass, and produce 100% clean magnetic fractions with high magnetic recovery.

DOVE High Intensity Disc Magnetic Separators is configured with adjustable magnetic intensity mechanism, with intensity varying from 0 to 20,000 gauss, which allows for the extraction of paramagnetic particles.

DOVE High Intensity Disc Magnetic Separators are designed so that magnet circuit is independent of their supporting frame, and are designed to isolate and prevent any flux leakage from the magnet circuit. They are assembled on heavy nonmagnetic brockets.

DOVE High Intensity Disc Magnetic Separators are built with the highest quality of material and are designed for economical operations as they produce clean magnetic fractions materials that requires no further treatment.

DOVE High Intensity Disc Magnetic Separators, also known as Electro-Magnetic Disc Separators, (3) Three Disc Magnetic Separators, Three Disc Dry Magnetic Separators and Three Disc electromagnetic Separators, is a highly efficient device for separation of difficult minerals with various different degree of difference in their magnetic susceptibilities, to produce very fine selectively achieved clean magnetic fractions with highest recovery.

A Three Disc Magnetic Separator will typically feature three revolving high- intensity electromagnetic discs, each set at a different height from a flat feed belt conveyor that passes between the poles of electromagnets.

The material to be treated is introduced to the main belt in a thin layer on and passes under each of the three revolving discs and the electro magnetic pole pieces, successively. The magnetic particles are attracted to the zones of high magnetic gradient on the undersides of the discs and carried beyond the edges of the belt conveyor where they cant be influences by the magnetic field. The magnetic minerals drop into various product chutes on each side of the conveyor. The clean nonmagnetic minerals pass unaffected under all the poles and are discharged into a product box at the end of the conveyor, where a brush is fitted to ensure that particles do not adhere to the belt.

magnetic separation for mineral processing | bunting

magnetic separation for mineral processing | bunting

Bunting is committed to helping customers across the mineral processing industry to break ground as our equipment assists them in solving challenging problems. We dig down to find the root cause of their problems and use specialty software to custom-design the best solutions to fit the customers needs. We offer exceptionally rugged magnets and heavy-duty magnetic separation equipment specifically to cater to customers in the aggregate, mining, and mineral industries. Working with these materials is tough, but Bunting equipment is even tougher. Our magnetic separation equipment will protect the other equipment utilized in your facility and allow you to deliver the highest purity product to your customers.

Bunting provides equipment to help mineral processing companies by using magnetic separation technology to remove metal contaminants from product lines and providing metal detection equipment to alert operators of ferrous and non-ferrous metal hazards trapped within greater product mass. All of our equipment is designed to be low-maintenance and operator friendly to increase efficiency and decrease downtime in your production.

Magnetic separation utilizes powerful magnets to pull out ferrous metal contaminants from a product line, trapping them against the face of the magnet and ensuring they cannot re-enter the product stream. The strength of the magnetic field means that continued product flow, no matter how rapid, will not be able to dislodge the ferrous material from where it has been initially trapped. Bunting offers magnetic separation equipment suitable for heavy-duty applications, with rugged construction designed for handling large amounts of material.

Metal detection systems generate an electromagnetic field that material is flowed through, sensing and rejecting any ferrous or non-ferrous metal that is hidden within the product. In situations where a magnetic separator may be unable to remove a non-ferrous contaminant, such as aluminum, a metal detector is able to sense this metal and remove the contaminated section of product from the greater flow of operations.

All of our products are custom designed according to the customers specifications, allowing for them to integrate seamlessly into the existing production environment. Our team of engineers works with each customer to deliver a personalized piece of equipment with the physical dimensions to best fit your space and the magnetic components that best suit your separation and detection needs.

Induced roll magnetic separators are used for the continuous extraction of small magnetic particles from certain minerals to produce mineral purification for a wide range of mineral and ceramic processing industries.

Induced roll magnetic separators are used for the continuous extraction of small magnetic particles from certain minerals to produce mineral purification for a wide range of mineral and ceramic processing industries.

The Magnetic Drum Separator is normally installed at product discharge points and incorporates a 150 180 degree magnet system, encased in a stainless steel shell, or manganese wear plates for severe application.

The Magnetic Drum Separator is normally installed at product discharge points and incorporates a 150 180 degree magnet system, encased in a stainless steel shell, or manganese wear plates for severe application.

magnetic separation for mining industry magnetense

magnetic separation for mining industry magnetense

Our magnetic system for the mining industry are designed to perform the magnetic separation of: EMATITE, SALT,BARITE, TAILINGS, TITANIUM ORE, VADIUM, TUNGSTEN, MOLYBDENUM, NICKEL ORE, MAGNESIA, COPPER ORE, MAGNESITE, COAL, COBALT, POTASH SALT, GRAPHITE, MICA, LIMENITE RUTILE, NICKEL ORE, GOLD ORE, IRON ORE, FELDSPAT, CHROME ORE, DIAMOND ORE, BAUXITE, BETONITE, ANTHACITE and SILICATE.

Contact us to find out how Magnetense can help you overcoming system and productivity challenges. We offer complimentary video, telephone and chat conversations to help you clarifying your needs in order to present you with the most cost-efficient solutions.

This type of magnetic separation machine is used in wet separation processes for smaller than 1,2 mm ( 200 mesh of 30-100 %) of fine grained red mine (hematite) limonite, manganese ore, ilmenite and some kinds of weakly magnetic minerals like quartz, feldspar, nepheline ore and kaolin in order to remove impurity iron and to purify them.

This type of Vertical Ring High Gradient Magnetic separator uses a wholly sealed oil cooling circulating device: through this device process water goes through a oil-water heat exchanger used to remove the heat generated by the magnetic separators coils. The windings coil generates a magnetic field through the upper and lower yokes: a vertical ring can rotate according to the required direction. When the magnetic separator is working, the hopper is fed by the feeding tube with a pulp that flows through the rotating rings, along with the gap of upper magnetic poles. An induction magnetic matrix composed by high permeability stainless steel rods generates an high gradient magnetic field.

Pulp enters in contact with the lower part of the rotating ring and the magnetic matrix surface attracts magnetic particles. Due to the ring rotation the magnetic minerals are transferred to the nonmagnetic area of the ring and are discharged to the upper hopper by the water flow. The non magnetic particles are moved down to the lower hopper following the gap of the lower magnetic pole and the magnetic separation of magnetic minerals is completed. At this point the pulsating box is activated causing the pulp shaking up and down in order to remove impurities and improving the concentration of the pulp.

The HMF electromagnetic filters are used in wet process separation of para-magnetic minerals found in quartz, feldspar,silicates, calcium carbonate and kaolin. The flow-rates are engineered in accordance with customer requirements.

Most older generation magnetic belt conveyors were fitted only with ferrite magnets. Our Overbelt Shark model has a specific combination of ferrite and neodymium magnets: what is the advantage for you?

PLEASE NOTE: In this industry it is common practice adopted by some manufacturers to guarantee magnetic performances only on the base of approximated calculations or under non-operating conditions. In this regard Magnetense is different and the performance stipulated above are measurable and documented.

To provide an additional wear resistance, we reinforced the side structures (sometimes severely stressed by the continuous use of grinding machines or by extreme working conditions or by weather conditions) and the diameter of the shafts (some customers told us they have even exaggerated).

With a diameter of 300 mm and a working height of 1500 mm, our tigers have a higher capacity than lower heights and diameters machines: this feature, combined with the exceptional magnetic power (12,310+ Gauss in contact wit the surface), allows our magnetic pulley to practically catch almost any magnetic particle or paramagnetic mineral.

Rollers 100 mm to 300 mm diameter with working heights varying from 1.000 to 1.500 mm.can be installed in our machines. In order to meet specific customers requests, MAGNETENSE can produce rollers larger than 300 mm diameter.

Contact us to find out how Magnetense can help you overcoming system and productivity challenges. We offer complimentary video, telephone and chat conversations to help you clarifying your needs in order to present you with the most cost-efficient solutions.

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magnetic separator machine | gold separator equipment jxsc mining

magnetic separator machine | gold separator equipment jxsc mining

Magnetic separation is a widely used mineral separation method based on the difference of magnetic properties between different minerals, separate target minerals in the inhomogeneous magnetic field. The magnetic separator is used for mineral ore dressing of magnetite, pyrrhotite, ilmenite, wolframite, manganese, rare earth ore and other materials with a particle size of less than 3 mm, and is also used for iron removal operations of coal, non-metallic minerals, building materials and the like. Types of magnetic separator 1. According to the processing media, it can be divided into dry type and wet type magnetic separator. (1) Dry-type magnetic separator mainly for sorting large and coarse grains of strong magnetic ore and fine-grained weak magnetic ore. (2) Wet type magnetic separator mainly for sorting fine-grained strong magnetic ore and fine-grained weak magnetic ore. 2. According to the strength of the magnetic field, the magnetic separator is divided into the weak magnetic separator (H<2500 guass), medium magnetic separator (H<6000 Guass), and strong magnetic separator (H>6000 Guass).

JXSC, a magnetic separator manufacturer, has four types of magnetic separator machine: Dry drum magnetic separator, High-intensity magnetic separator, Three-disc dry magnetic separator, and Wet drum magnetic separator.

Wet type magnetic separator MAX. magnetic force: 8000gs Application: separating the magnetic mineral from the 3~0 mm fine-grain mixture. Especially suitable for iron removal and purification in non-metallic minerals, such as quartz sand and potassium feldspar. The magnetic separator uses magnets to attract magnetic materials to separate out the magnetic components of the mixture feed. When the slurry enters the magnetic field, the ferromagnetic mineral is adsorbed on the surface of the cylinder, the weak magnetic and non-magnetic minerals are washed out by the water flow, all of them are discharged from different outlets. Features Feeding and discharging continuously low downtime. High magnetic force and high magnetic field gradient.

The three-disc electromagnetic separator is suitable for dry separation of titanium ore, rare earth ore, tungsten tin ore, chromite, niobium and tantalum ore, limonite, zirconium, disthene, monazite, andalusite, disthene, feldspar, quartz and other metallic minerals with different magnetic properties, or for iron removal of non-metallic materials. Features 1. Very high magnetic field intensity 16000gauss - 20000gauss 2. This separator can separate four different minerals in one time. 3. This separator can get the final concentrate of three to four minerals. 4. Ta & Nb grade can reach 60% by using this separator. 5. It's easy to install, adjust, and operate. 6. The magnetic intensity of each disc is adjustable from 1000-20000 gauss, could be used for other mineral concentrations.

The dry magnetic separator is used for sorting dry magnetic minerals, and is mainly used for selecting large-sized, coarse-grained ferromagnetic ores and fine-grained weak magnetic ores. It has three types of single disc (diameter = 900 mm), double disc ( = 576 mm) and three discs ( = 600 mm). The magnetic field strength can reach 880-1440 kA/m. The magnetic system of the dry magnetic separator is made of high-quality ferrite material or composited with rare earth magnet steel. The average magnetic induction intensity of the cylinder table is 100-600 mT. The factors affecting the dry magnetic separator are mainly ore properties (ore grade, magnetism, particle size and moisture), equipment performance and operation. Features High separating efficiency, do great help for ultra-poor magnetite; water-saving, suited for the water-deficient area; light weight, reliable operation and convenient maintenance.

Mining Equipment Manufacturers, Our Main Products: Gold Trommel, Gold Wash Plant, Dense Media Separation System, CIP, CIL, Ball Mill, Trommel Scrubber, Shaker Table, Jig Concentrator, Spiral Separator, Slurry Pump, Trommel Screen.

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.

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