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Industrial strength magnetic separation equipment has been used in manufacturing facilities for decades. These magnetic separators remove unwanted ferrous metals from bulk products to improve product purity, protect sensitive processing equipment from damage, and prevent fires or explosions. While these separators have been widely used in industrial applications for many years, the past 10 to15 years have seen a marked increase in the general strength of these magnetic separators due to strong influences for safety in the food and pharmaceutical industries

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magnetic separator safety tips | manufacturing.net

When a product is contaminated with very fine weakly magnetic metal, a very powerful rare-earth permanent magnet is often required to remove it. While these rare-earth magnets are very efficient at removing the unwanted contamination, they can be very dangerous to maintenance personnel if not handled properly. Injuries have ranged from pinched fingers to crushed hands to the loss of extremities. For these reasons, plant managers are putting more emphasis on magnet safety training for the protection of their workers

It is very important that “strong magnet” warning labels be placed on or next to the area where the magnet is installed — this would warn anyone in the area that extreme caution should be used in proximity to the magnet. (See Figure 1.) Your magnet should already have warning labels installed on them when they arrive from the manufacturer. Most manufacturers are glad to send additional warning labels if requested

Extreme care should always be used when handling an industrial-strength magnet, especially rare-earth magnets. Most workers are completely unaware of the potential danger and have no idea of the actual strength of these magnets. When used properly, these magnets are extremely effective at removing unwanted metal contamination from bulk products. However, as mentioned earlier, these same magnets have the potential to severely injure a worker if they are not handled with extreme care

magnetic separator safety tips | manufacturing.net

Some medical devices (such as pacemakers) can be adversely affected by strong magnetic fields. Therefore workers who have these medical devices should be strongly encouraged to keep away from the strong magnets installed in the plant. If the worker’s normal responsibilities place him or her in relatively close proximity to the magnet, the worker should be instructed to contact his or her physician and the medical device manufacturer to determine a safe distance between the worker and the magnet

It is recommended that industrial-strength magnets be installed in areas that are free of carbon steel or other magnetic metals. Even if the magnet is successfully installed, the carbon steel can detract from the effectiveness of the magnet by draining some of its magnetic field. For these reasons, use as much 300 series stainless steel (or other non-ferrous materials, such as wood or plastic) in the area surrounding the magnet

Industrial-strength magnetic separators play a very important role in manufacturing facilities across the world. If handled properly, they are a safe, efficient way of removing unwanted ferrous contamination from a valuable product. Plant managers and maintenance supervisors recognize the need for these powerful magnets in their plants and are emphasizing the importance of magnet safety training to keep their workers safe. Safety must always be the first priority when handling strong magnets

magnetic separator safety tips | manufacturing.net

magnetic separator manufacturers suppliers | iqs directory

Find a leading magnetic separator manufacturer using IQS Directory is a tool to assist you. Contact the below companies that can design, engineer, and manufacture magnetic separator to your specifications. Peruse our website to review and discover magnet manufacturers. Connect with companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product new articles. Whether you are looking for manufacturers of magnetic separators, magnets, and magnetic equipment of every type, IQS is the premier source for you

Eriez is a world authority in advanced technology for magnetic, vibratory and inspection system applications. We design, develop, manufacture and market magnetic separation equipment for process and metalworking industries. With manufacturing experiences dating back to 1942 Eriez has expanded into an international supplier with a global presence in over 80 different markets on five continents. We are a customer-oriented supplier which is why we work hard to not only provide a consistent product quality but also to offer quick turnaround on all of your orders. All of our equipment is thoroughly tested and we strive to give our customers the very best service. Please contact one of our representatives to learn more information about our company!

Magnetic separators utilize wire coils as well as direct currents to create a magnetic field which is then used to separate ferrous materials from nonferrous materials. These items are ideal in manufacturing settings where extracting metals is ideal for not only recycling but also for purifying the materials. This type of equipment has a number of other industries such as electronic waste recycling, materials recovery, municipal solid waste/biomass, bottom ash, construction, demolition, glass cullet and more.

magnetic separator manufacturers suppliers | iqs directory

These types of magnetic separators come in a wide range of configurations such as plate magnets, grate magnets, liquid line trap magnets, RF cartridges, deep reach separators, pulley magnets, magnetic drums, suspended permanent magnets, super conducting hi-gradient magnetic separators and much more. Specific types of magnetic separators can be specialized for different tasks based upon the exact needs of an application which is where wet high intensity magnetic separators and eddy current separators play a role

magnetic separator - an overview | sciencedirect topics

As magnetic separators progress toward larger capacity, higher efficiency, and lower operating costs, some subeconomic iron ores have been utilized in recent years. For example, magnetite iron ore containing only about 4% Fe (beach sands or ancient beach sands) to 15% Fe (iron ore formations) and oxidized iron ore of only about 10% Fe (previously mine waste) to 20% Fe (oxidized iron ore formations) are reported to be utilized. They are first crushed and the coarse particles pretreated using roll magnetic separators. The magnetic product of roll magnetic separators may reach 25–40% Fe and then is fed to mineral processing plants

As shown in Figure 5, slurry is fed from the top of an inclined screen in a low-intensity magnetic field, with the mesh size of screen sufficiently larger than those of particles in slurry. As the slurry flows down the above surface of screen, magnetic particles agglomerate with the size of agglomerations increasingly growing and roll down as magnetic concentrate at the lower end of screen. The less- or nonmagnetic particles pass through the screen as tailings. Figure 5 shows the operation of screen magnetic separators for cleaning of magnetite

magnetic separator - an overview | sciencedirect topics

Commercial magnetic separators are continuous-process machines, and separation is carried out on a moving stream of particles passing into and through the magnetic field. Close control of the speed of passage of the particles through the field is essential, which typically rules out free fall as a means of feeding. Belts or drums are very often used to transport the feed through the field

As discussed in Section 13.4.1, flocculation of magnetic particles is a concern in magnetic separators, especially with dry separators processing fine material. If the ore can be fed through the field in a monolayer, this effect is much less serious, but, of course, the capacity of the machine is drastically reduced. Flocculation is often minimized by passing the material through consecutive magnetic fields, which are usually arranged with successive reversals of the polarity. This causes the particles to turn through 180°, each reversal tending to free the entrained gangue particles. The main disadvantage of this method is that flux tends to leak from pole to pole, reducing the effective field intensity

Provision for collection of the magnetic and nonmagnetic fractions must be incorporated into the design of the separator. Rather than allow the magnetics to contact the pole-pieces, which then requires their detachment, most separators are designed so that the magnetics are attracted to the pole-pieces, but come into contact with some form of conveying device, which carries them out of the influence of the field, into a bin or a belt. Nonmagnetic disposal presents no problems; free fall from a conveyor into a bin is often used. Middlings are readily produced by using a more intense field after the removal of the highly magnetic fraction

magnetic separator - an overview | sciencedirect topics

Conventional magnetic separators are largely confined to the separation or filtration of relatively large particles of strongly magnetic materials. They employ a single surface for separation or collection of magnetic particles. A variety of transport mechanisms are employed to carry the feed past the magnet and separate the magnetic products. The active separation volume for each of these separators is approximately the product of the area of the magnetised surface and the extent of the magnetic field. In order for the separators to have practical throughputs, the magnetic field must extend several centimetres. Such an extent implies a relatively low magnetic field gradient and weak magnetic forces

To overcome these disadvantages HGMS has been developed. Matrices of ferromagnetic material are used to produce much stronger but shorter range magnetic forces over large surface areas. When the matrices are placed in a magnetic field, strong magnetic forces are developed adjacent to the filaments of the matrix in approximately inverse proportion to their diameter. Since the extent of the magnetic field is approximately equal to the diameter of the filaments the magnetic fields are relatively short range. However, the magnetic field produced is intense and permits the separation and trapping of very fine, weakly magnetic particles (Oberteuffer, 1979)

The transport medium for HGMS can be either liquid or gaseous. Dry HGMS processing has the advantage of a dry product although classification of the pulverised coal is required to ensure proper separation. Small particles tend to agglomerate and pass through the separator. It has been shown that individual particles of coal in the discharge of a power plant pulveriser flow freely and hence separate well only if the material below about 10 µm is removed (Eissenberg et al., 1979). Even then drying of that part of run of mine coal to be treated by HGMS may be required to ensure good flow characteristics

magnetic separator - an overview | sciencedirect topics

A schematic representation of a batch HGMS process is shown in Figure 11.5 (Hise, 1979, 1980; Hise et al., 1979). It consists of a solenoid, the core cavity of which is filled with an expanded metal mesh. Crushed coal is fed to the top of the separator. Clean coal passes through while much of the inorganic material is trapped to be released when the solenoid is later deactivated

Data from a batch HGMS process of one size fraction of one coal are plotted in Figure 11.6 as weight per cent of material trapped in the magnetic matrix, the product sulphur and the product ash versus the independent variable of superficial transport velocity. At low superficial transport velocities the amount of material removed from the coal is high partly due to mechanical entrapment. As the velocity is increased the importance of this factor diminishes but hydrodynamic forces on the particles increase. These hydrodynamic forces oppose the magnetic force and the amount of material removed from the coal decreases (Hise, 1979)

For comparison, Figure 11.7 shows data from a specific gravity separation of the same size fraction of the same coal. While the sulphur contents of the products from the two separation processes are similar the ash content of the HGMS product is considerably higher than that of the specific gravity product. It should be emphasised that this comparison was made for one size fraction of one coal

magnetic separator - an overview | sciencedirect topics

More recently dry HGMS has been demonstrated at a scale of 1 t/h on carousel type equipment which processes coal continuously (Figure 11.8; Hise et al., 1981). A metal mesh passes continuously through the magnetised cavity so that the product coal passes through while the trapped inorganics are carried out of the field and released separately

Wet HGMS is able to treat a much wider range of coal particle sizes than dry HGMS. The efficiency of separation increases with decreasing particle size. However, depending on the end use a considerable quantity of energy may have to be expended in drying the wet, fine coal product. Wet HGMS may find particular application to the precleaning of coal for use in preparing coal water mixtures for subsequent combustion as both pulverising the coal to a fine particle size and transporting the coal in a water slurry are operations common to both processes

Work at Bruceton, PA, USA has compared the pyrite reduction potential of froth flotation followed by wet HGMS with that of a two stage froth flotation process (Hucko and Miller, 1980). Typical results are shown in Figures 11.9 and 11.10. The reduction in pyritic sulphur is similar in each case although a greater reduction in ash content is achieved by froth flotation followed by HGMS than by two stage froth flotation. However, Hucko (1979) concludes that it is highly unlikely that HGMS would be used for coal preparation independently of other beneficiation processes. As with froth flotation there is considerable variation in the amenability of various coals to magnetic beneficiation

magnetic separator - an overview | sciencedirect topics

In the magnetic separator, material is passed through the field of an electromagnet which causes the retention or retardation of the magnetic constituent. It is important that the material should be supplied as a thin sheet in order that all the particles are subjected to a field of the same intensity and so that the free movement of individual particles is not impeded. The two main types of equipment are:

Eliminators, which are used for the removal of small quantities of magnetic material from the charge to a plant. These are frequently employed, for example, for the removal of stray pieces of scrap iron from the feed to crushing equipment. A common type of eliminator is a magnetic pulley incorporated in a belt conveyor so that the non-magnetic material is discharged in the normal manner and the magnetic material adheres to the belt and falls off from the underside

Concentrators, which are used for the separation of magnetic ores from the accompanying mineral matter. These may operate with dry or wet feeds and an example of the latter is the Mastermag wet drum separator, the principle of operation of which is shown in Figure 1.43. An industrial machine is shown in operation in Figure 1.44. A slurry containing the magnetic component is fed between the rotating magnet drum cover and the casing. The stationary magnet system has several radial poles which attract the magnetic material to the drum face, and the rotating cover carries the magnetic material from one pole to another, at the same time gyrating the magnetic particles, allowing the non-magnetics to fall back into the slurry mainstream. The clean magnetic product is discharged clear of the slurry tailings. Operations can be co- or counter-current and the recovery of magnetic material can be as high as 99.5 per cent

magnetic separator - an overview | sciencedirect topics

An example of a concentrator operating on a dry feed is a rotating disc separator. The material is fed continuously in a thin layer beneath a rotating magnetic disc which picks up the magnetic material in the zone of high magnetic intensity. The captured particles are carried by the disc to the discharge chutes where they are released. The nonmagnetic material is then passed to a second magnetic separation zone where secondary separation occurs in the same way, leaving a clean non-magnetic product to emerge from the discharge end of the machine. A Mastermagnet disc separator is shown in Figure 1.45

The removal of small quantities of finely dispersed ferromagnetic materials from fine minerals, such as china clay, may be effectively carried out in a high gradient magnetic field. The suspension of mineral is passed through a matrix of ferromagnetic wires which is magnetised by the application of an external magnetic field. The removal of the weakly magnetic particles containing iron may considerably improve the “brightness” of the mineral, and thereby enhance its value as a coating or filler material for paper, or for use in the manufacture of high quality porcelain. In cases where the magnetic susceptibility of the contaminating component is too low, adsorption may first be carried out on to the surface of a material with the necessary magnetic properties. The magnetic field is generated in the gap between the poles of an electromagnet into which a loose matrix of fine stainless steel wire, usually of voidage of about 0.95, is inserted

The attractive force on a particle is proportional to its magnetic susceptibility and to the product of the field strength and its gradient, and the fine wire matrix is used to minimise the distance between adjacent magnetised surfaces. The attractive forces which bind the particles must be sufficiently strong to ensure that the particles are not removed by the hydrodynamic drag exerted by the flowing suspension. As the deposit of separated particles builds up, the capture rate progressively diminishes and, at the appropriate stage, the particles are released by reducing the magnetic field strength to zero and flushing out with water. Commercial machines usually have two reciprocating canisters, in one of which particles are being collected from a stream of suspension, and in the other released into a waste stream. The dead time during which the canisters are being exchanged may be as short as 10 s

magnetic separator - an overview | sciencedirect topics

Magnetic fields of very high intensity may be obtained by the use of superconducting magnets which operate most effectively at the temperature of liquid helium, and conservation of both gas and “cold” is therefore of paramount importance. The reciprocating canister system employed in the china clay industry is described by Svarovsky(30) and involves the use a single superconducting magnet and two canisters. At any time one is in the magnetic field while the other is withdrawn for cleaning. The whole system needs delicate magnetic balancing so that the two canisters can be moved without the use of very large forces and, for this to be the case, the amount of iron in the magnetic field must be maintained at a constant value throughout the transfer process. The superconducting magnet then remains at high field strength, thereby reducing the demand for liquid helium

Micro-organisms can play an important role in the removal of certain heavy metal ions from effluent solutions. In the case of uranyl ions which are paramagnetic, the cells which have adsorbed the ions may be concentrated using a high gradient magnetic separation process. If the ions themselves are not magnetic, it may be possible to precipitate a magnetic deposit on the surfaces of the cells. Some micro-organisms incorporate a magnetic component in their cellular structure and are capable of taking up non-magnetic pollutants and are then themselves recoverable in a magnetic field. Such organisms are referred to a being magnetotactic

where mpa→p is the inertial force and ap the acceleration of the particle. Fi are all the forces that may be present in a magnetic separator, such as the magnetic force, force of gravity, hydrodynamic drag, centrifugal force, the friction force, surface forces, magnetic dipolar forces, and electrostatic forces among the particles, and others

magnetic separator - an overview | sciencedirect topics

Workable models of particle motion in a magnetic separator and material separation must be developed separately for individual types of magnetic separators. The situation is complicated by the fact that many branches of magnetic separation, such as separation by suspended magnets, magnetic pulleys, or wet low-intensity drum magnetic separators still constitute highly empirical technology. Hesitant steps have been taken to develop theoretical models of dry separation in roll and drum magnetic separators. Alternatively, open-gradient magnetic separation, magnetic flocculation of weakly magnetic particles, and wet high-gradient magnetic separation (HGMS) have received considerable theoretical attention. A notable number of papers dealing with the problem of particle capture in HGMS led to an understanding of the interaction between a particle and a matrix element. However, completely general treatment of the magnetostatic and hydrodynamic behavior of an assembly of the material particles in a system of matrix elements, in the presence of a strong magnetic field, is a theoretical problem of considerable complexity which has not been completed, yet. Detailed description of particle behavior in various magnetic separators can be found in monographs by Gerber and Birss (1983) and Svoboda (1987, 2004)

The brick material ratio was: Slag(1.0mm<): Grog (3.0mm<): Ceramic Gravel (1.0mm<): Clay (1.0mm<) at 20 : 35 : 25 : 20. To this mixture, 2% of pigment were added. Kneading and blending was done by a Müller mixer for 15 minutes. Molding was done by a 200 ton friction press, and the bricks were loaded onto the sintering truck

This paper presents preliminary results using the Magnetic Micro-Particle Separator, (MM-PS, patent pending) which was conceived for high throughput isothermal and isobaric separation of nanometer (nm) sized iron catalyst particles from Fischer-Tropsch wax at 260 oC. Using magnetic fields up to 2,000 gauss, F-T wax with 0.3–0.5 wt% solids was produced from 25 wt% solids F-T slurries at product rates up to 230 kg/min/m2. The upper limit to the filtration rate is unknown at this time. The test flow sheet is given and preliminary results of a scale-up of 50:1 are presented

magnetic separator - an overview | sciencedirect topics

Most loads for flap valves, conveyors, vibrating feeders, crushers, paddle feeders, magnetic separators, fans and trash screens generally are supplied at 415 V three-phase 50 Hz from the 415 V Coal Plant Switchboard, although 3.3 kV supplies may be used when the duty demands. Stacker/reclaimer machines are supplied at 3.3 kV. Electrical distribution is designed to safeguard the independent operational requirements of the duplicated coal plant facilities and to ensure that an electrical fault will not result in the total loss of coal supplies to the boilers

The first step in any form of scrubbing unit is to break the lumpy materials and remove tramp elements by a magnetic separator. The product is then led into the scrubbing unit. The dry scrubbing principle is to agitate the sand grains in a stream of air so that the particles shot-blast each other. A complete dry scrubbing plant has been described in a previous book of this library in connection with sodium silicate bonded sands.* For clay-bonded sands the total AFS clay content in the reclaimed sand varies from 0·5% to 2·5% clay depending on the design of the plant

magnetic separation | elcan industries

In 2012, an Elcan customer approached us with a dilemma, they needed magnetic separation of powders and had jointly purchased a magnet with another tolling company to pass their material through to remove contamination. The machine was the Eriez DVMF Electromagnet. Unfortunately, the machine was never able to be run properly because it was too complicated for the original toller. Elcan and the customer then made a deal to have Elcan take the magnet, get it running and work off the purchase by running the customer’s product at a discount

Elcan Industries teamed up with the manufacturer of the machine Eriez Magnetics. In a short period of time, the unit was installed and running for the customer. The magnet is perfect for companies looking to remove metal contaminants from a product. Elcan has assisted numerous companies removing ferrous material from their product using this magnet as well. The equipment passes a current through the coil within the machine creating a magnetic field. This in turn magnetizes the steel matrix inside the machine. As material passes through the magnetized matrix, any magnetic material gets caught and the non-magnetic material passes through. Once the matrix is full, the material is removed and the process continues. Elcan Industries has this equipment available for testing and toll processing

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