Eddy current magnetic separators electro magnetic industries. This unit is designed for separation of fine grain materials ranging from 0. The eddy current separator is applied to a conveyor belt carrying mixed waste. At the end of the conveyor belt is an eddy current rotor. Eddy current separator our highly efficient eddy current separator is the most advanced magnetic separators which are commonly used to separate nonferrous metals from mixed waste and other streams. If the magnetic induction in a material changes with time, a voltage is generated in that material, and the induced voltage will produce a current, called an eddy current. Pdf recovery of fine nonferrous metals from waste streams is a. Shredded computer items can be run over for aluminium, gold, and silver if the precious metal isnt held down in other. The role of the eddy current separator ecs is to effectively remove highvalue nonferrous metals, such as aluminium, copper and brass from the waste stream. Eriez has designed a range of modular systems where customers can purchase one complete unit to separate ferrous and nonferrous metals. It purely separate aluminium, copper, brass and other nonferrous metals from your product stream, municipal solid waste recycling, scrap residue. Goudsmit excentric eddy current separator the eddy current separators manufactured by goudsmit have been used widely for decades. The eddy current method is based on the principle of generating circular electrical currents eddy currents in a conductive material. Nonferrous metal separator nes eddy current separator nesp.
Specifications diagram of an eddy current separator diagram of a typical eddy current separator system b c2 a c1 e f h g c2 c1 b a e f notes. The dings eddy current system separates nonferrous metals such as aluminum, diecast metal, and copper from nonmetallic material. Eddy current separators may use a rotating drum with permanent. While such a process extends well beyond the scope of this article, we can at. The hood with adjustable splitter gives customers the ability to switch back and forth between the fines adjustment for processing small particles and the rack and pinion. These separators range from slide chutes lined with alternating permanent magnets to electromagnetic circuits that generate a pulsed field when conducting material is sensed. As rob jones, managing director of ecs manufacturer magnapower explains, the technology behind an ecs is simple, but effective. For a demonstration, well use another conveyor belt arrangement. It uses eddy currents to do this, which is where its name comes from. A copper or aluminum plate sticks out from the roller coaster cars, not shown, and passes between the magnets shown. The magnetic fields oppose the field that is produced by the magnetic rotor itself, thus repelling the. Basically, a rotor comprised of magnet blocks, either standard ferrite ceramic or the more powerful rare earth magnets depending on application, are spun at high revolutions over 3000 rpm to produce an eddy current. The high price of raw materials such as aluminium or copper make separators, essential machines in waste sorting centres. However, further processing is still needed to remove coatings and some alloys before remelting, for example the tin coating on tin cans.
An eddy current separator is designed to remove nonferrous metals. The eddy current separator is a nonferrous separator that goudsmit has been producing and improving for many years. Eddy current testing is a nondestructive test method for metals, which can be used to detect cracks in metals. Eddy current rotor speed the eddy current rotor speed controls the speed at which the internal magnet array spins inside the end roller unit. Eddy current non ferrous separator english youtube. An eddy current separator is a sorting machine used in the recycling of waste. The effect of such currents is to induce a secondary. The principle of the eddy current separator is fairly straightforward.
Magnapower eddy current separator material separation. Doitpoms tlp library recycling of metals eddy current. Flake eddy current separator ecs buntings clean, lowprofile eddy current separator uses magnetic finite element design to optimize the magnetic field, and maximize the focal point and strength of the gauss intensity. Sgm offer different types of eddy current separator machines for non ferrous metal recovery, from the very basic models to high frequency and ultra high frequency systems. The magnapower eddy current separator can be used to separate material from fines to oversize. One of our success drivers is the eddy current separator featuring the eccentric pole system. Eddy current separators a comprehensive list of companies involved in the manufacture and supply of eddy current separators. A wide variety of eddy current separator options are available to you, there are 2,305 suppliers who sells eddy current separator on, mainly located in asia. Electrostatic separators are for separation of metals and nonmetals that cannot be separated by conventional magnetic separators such as. Pdf eddy current separation of fine nonferrous particles from.
Today, these powerful systems feature improved permanent magnetic circuits with rare earth magnetic material for stronger eddy currents and improved separation of nonferrous materials. Eddy current separator has better recycling on many kinds of nonferrous metals. Eddy current separators protecting your investment eddy current separators are crucial piece of equipment when it comes to sorting valuable, nonferrous scrap metals from waste wmw looks at the steps an operator can take to protect their investment. A wide variety of used eddy current separator options are available to you, there are 6 suppliers who sells used eddy current separator on, mainly located in asia. Eddy current separator is most suitable machine for recycling copper, aluminum and other nonferrous metals from industrial rubbish and municipal solid waste msw. Such changes in magnetic flux can be achieved by rotating permanent magnets past an electrical conductor.
Magnapower eddy current separator material separation tests. Apr 19, 2011 star trace eddy current separation devices are an effective way of removing nonferrous metals from other products. This type of magnet can remove nonferrous metals from mixed waste and other recycling product streams. Eddy current separatorstrong efficient separation dings eddy current separators use powerful rare earth magnets for recovering aluminum and other non ferrous metals from recyclables, plastics, glass, material processed at composting or wastetoenergy facilities, automotive shredder residue, and other processed material or minerals. This separator, the so called vertical drum eddycurrent separator vdecs. The illustrated rotating permanent magnetic field eddy current separator has proven to be most effective in view of capital cost, operating. The typical eddy current separator looks like a drum at the end of a conveyor belt.
Master magnets eddy current separator pvc recycling. Think along the lines of finding fatigue cracks in the skin of an airplane, or heat exchanger tubes in a power plant. Magnets for aluminum include the eddy current separator. Theory and applications article pdf available in proceedings of the ieee 8010. Nonferrous metals are pushed forward by eddy current pole from the belt into the metal chute, the rest of material simply fall off the belt due to gravity to the second chute. We already mentioned eddy current brakes, where the opposing magnetic field can be used to slow something down. Revxe eddy current separators cutting tool engineering. Eddy current principle the eddy current method is based on the principle of generating circular electrical currents eddy currents in a conductive material. The eddy current separators manufactured by goudsmit have been used widely for. Combustible wastes nonferrous metals such as copper aluminum. Manufacturers of eddy current separators for magnetic. Inert material purification and nonferrous metal valorization. The housing has a splitter to divide the nonferrous metal from the nonmetallic material, such as paper, plastic, wood or fluff. The picture at right is a good example of one such brake.
Aug 22, 2014 hello i am a graduate mechanical design engineer who was recently offered a job through a graduate scheme at a company that develops recycling and waste management systems. An eddy current separator uses a powerful magnetic field to separate nonferrous metals from waste after all ferrous metals have been removed previously by. Eccentric eddy current separators bakker magnetics. The two streams of material discharge into a housing. We need to get the magnets moving a lot faster than the stuff were separating. Oct 04, 2011 the magnapower eddy current separator can be used to separate material from fines to oversize. Eddycurrent magnetic separator ecms500 for nonferrous metals is primarily designed to separate aluminum cans from other waste, but it can separate other nonferrous metals such as brass and copper. The rotation speed results in a rapidly fluctuating changing magnetic field. Most of the magnet is heavily shielded except at the dropoff point from the conveyor where, i assume, the shielding is light enough to allow the eddy currents to have their effect. Pdf this paper presents a new vertical type of dynamic. Star trace eddy current separation devices are an effective way of removing nonferrous metals from other products. Material is fed onto the conveyor belt of the eddy current separator, which moves it across the magnetic rotor where separation occurs. Eddy current separators work by inducing magnetic fields around conductive nonferrous metals. Apr 09, 2018 revxe eddy current separators offer a direct drive for both the rotor and conveyor.
Application such as aluminum cans from municipal waste, aluminum. Sgm eddy current separators are proved products running in most successful waste recycling facilities and metal scrap yards all over the world and also australia. Several types of eddy current separators have been developed in recent years. Bulletin 9000f1 1011 2 pulley eddy current separator maintenance and operating instructions check immediately when the eddy current separator is received for possible.
High yield and long life are the qualities that make. Nonferrous metal separator nes eddy current separator. Eddy current separation of nonferrous metals using a variable. An eddy current magnetic actually repel the nonferrous metals, such as aluminium caps and rings from pet bottles, auto and white goods separation, fluff from metal fragmentation processing can be run over an eddy current, which will pull out nonferrous material.
Nonferrous metals are push forward by eddy current pole from the belt into the metal chute, the rest of material simply fall off the belt due to gravity to the second chute. Application such as aluminum cans from municipal waste, aluminum flakes from shredded pet, brass and aluminum from foundry sands, and metals from shredded auto mobile scrap, other metals such as lead can also be removed. A schematic representation of eddy current separation is shown in figure 3. It is not designed to be a source of magnetic ferrous separation. Eddy current separation technique is used for separating metals from nonmetal component. The principle is that an electric charge is induced into a conductor by changes in magnetic flux cutting through it. Hello i am a graduate mechanical design engineer who was recently offered a job through a graduate scheme at a company that develops recycling and waste management systems. The effect of such currents is to induce a secondary magnetic field around the nonferrous particle.
Other applications will be described in chapter 7 on metal recycling. The eddy current separator ecs, is a conveyor tape made with a particular magnetic field in the head, which is generated by high frequency polar wheel. Larger side panels allow complete open access to the ecs conveyor for easier maintenance. At the end of the conveyor belt, there is an eddy current rotor.
Eddy current separator separation manufacturer, supplier. Eddy current separation of nonferrous metals using a. The eddy current separator is applied to a conveyor belt carrying a thin layer of mixed waste. This machine separates nonferrous metals aluminum, zinc, copper, etc. Basically, a rotor comprised of magnet blocks, either standard ferrite ceramic or the more powerful rare earth magnets depending on an application, are spun at high revolutions to produce an eddy current. This implies more changing j magnetic fields that must be accounted for in eqn. The key component of the eddy current separator is the magnetic rotor, which has a series of permanent rare earth magnets mounted on a support plate attached to a shaft. When nonferrous metals enter special magnetic field, eddy current occurs and result in rejecting force to throw nonferrous metals away. Eddy current separation an overview sciencedirect topics. The compact and durable structure strongly suits the coarse working conditions. Strong magnetic field and variable frequency make eddy current separator a musthave machining in recycling industries.
Underlying this success is an innovative technology that differs from conventional concentric sorting systems in. They are composed of a conveyor belt system with a rapidly rotating magnetic rotor that creates an induction field by means of magnetic poles. As part of this i have to design and develop an new eddy current separation system so that the company can build the. Basically, a rotor comprised of magnet blocks, either standard ferrite ceramic or the more powerful rare earth magnets depending on application, are spun at high revolutions. Shredded computer items can be run over for aluminium, gold, and silver if the precious metal isnt held.
The working principle of an eddy current separating systems is based on the difference in electric conductivity of nonferrous. Eddy current separator for ewaste recycling magnetic. Price, stock, article number, product key, ferro separator, feeder module, working width. An eddy current separator uses a powerful magnetic field to separate nonferrous metals from waste after all ferrous metals have been removed previously by some arrangement of magnets. Eddy current separators ecs non ferrous separation. Application such as aluminum cans from municipal waste, aluminum flakes from. The key to eddy current separation is to get the magnets moving much faster than the material on the conveyor belt.
Star trace eddy current separator machines are an effective way of removing nonferrous metals from other products. It can also be used in aluminium, plastic, rubber, etc recycling industries. The device makes use of eddy currents to effect the separation. The eddy current separator is another excellent example of how knowledge of materials properties electrical conductivity and density has improved recycling technology. The top countries of suppliers are china, india, and taiwan, china, from which the percentage of eddy current separator supply is 99%, 1%, and 1% respectively. The illustrated rotating permanent magnetic field eddycurrent separator has proven to be most effective in view of capital cost. The ecs is at risk of costly damage from ferrous contamination 20160623 12. This machinery does not work on ferrous materials, which makes it ideal to isolate different types of metal from one another.
An eddy current separator respond to the problem of separating nonferrous metals from the remainder of refuse and depend on the ability of metals to conduct electrical current. The spinning magnet array is what generates the powerful eddy current that excites the ferrous properties internal to the materials traveling across the conveyor, once they reach close proximity to this. This short videos show ecs tests of a few different materials typically separated by ecs including. In 1969, eriez magnetics patented both permanent magnetic and electromagnetic eddy current separators. Inside this drum, a rare earth magnet is spun by an electric motor. An eddy current separator uses a powerful eddy magnetic field to separate nonferrous metals from waste after all ferrous metals have been removed previously by some arrangement of magnets. Eddy current separators are not designed to sort ferrous metals which become hot inside the eddy current field. A disadvantage of the magnus separator is the limited recovery, which is typically about 7080% for aluminium. This results in the maximum separation of the flake material. Pdf vertical drum eddycurrent separator with permanent magnets. Nonferrous metals are thrown forward from the belt into a product bin, while nonmetals simply fall off the belt due to gravity.