Separation systems for waste processing and recycling industries [for ferrous and non-ferrous metals] Centre of magnetic knowledge...

C O N T E N T S L I S T Business profile 3 Metal separation systems 4 BM delivery programme 6 Modular system concept 8 Magnet rotor 12 Technical data + Practical examples 14 ECSM non-ferrous separation systems 18 Overbelt magnet systems 20 Drum magnet systems 24 Headroller magnet systems 28 Block magnets 30

B U S I N E S S P R O F I L E [3] B A K K E R M A G N E T I C S [ B U S I N E S S P R O F I L E ] Gerard H. Bakker founded the company in 1971. Since its inception the company has enjoyed a continuous controlled growth. From the beginning we have focused on strengthening and expanding the Marketing and Sales organisation. At present, Bakker Magnetics is active in a large number of countries throughout the world. In order to be able to offer maximum service and support locally to customers in the application of our products, we have, over the years, established facilities in Belgium, Germany,...

M E T A L S E P A R A T I O N S Y S T E M S [5] B A K K E R M A G N E T I C S [ M E T A L S E P A R A T I O N S Y S T E M S ] Through modern insight, the control of waste flows has evolved from an environmental necessity into an industry, allowing profitable returns. Because of price-rises in raw materials and the development of new techniques in recent years, recovery of useful materials from waste flows has become an economic industry of increasing importance. Moreover, the energy required for recycling metals such as iron, aluminium and similar metals has proved to be a fraction of the energy...

B M D E L I V E R Y P R O G R A M M E [7] B A K K E R M A G N E T I C S [ B M D E L I V E R Y P R O G R A M M E ] Bakker Magnetics’ Overbelt magnet systems are standard, equipped with powerful permanent magnetic block magnets. Electromagnetic systems can be delivered on request. [2] BM DRUM MAGNETS The drum magnet, also called separation drum, contains two sectors: a magnetic and a non-magnetic sector. Around this system a drum rotates onto which the flow of materials is dropped. This material flow is fedd onto the magnetic sector of the drum. The magnetic field forces the iron particles to remain...

M O D U L A R S Y S T E M C O N C E P T [9] B A K K E R M A G N E T I C S [ M O D U L A R S Y S T E M C O N C E P T ] STRUCTURE OF THE NON-FERROUS SEPARATION SYSTEM The base of the modular system consists of two steel support girders, which, together with the box girders, make up the frame of the system. Both sides of the frame have mounting plates for assembling the modular separation units, a vibrating feeder and/or a magnet drum for removing the iron particles from the flow of material. This base ensures a solid and stable seat for the system. Great attention has been paid to an effective...

B A K K E R M A G N E T I C S [10] M O D U L A R S Y S T E M C O N C E P T STRUCTURE OF THE NON-FERROUS SEPARATION SYSTEM CONVEYOR BELT WITH INTEGRATED MAGNET ROTOR. SEPARATION UNITS SYSTEM CONTROL

M O D U L A R S Y S T E M C O N C E P T [11] B A K K E R M A G N E T I C S [ M O D U L A R S Y S T E M C O N C E P T ] controls: one 2.2 kW control for the driving of the conveyor belt and another 7.5 kW control with brake option for driving the induction roll. Four different pre-select settings can be entered. These parts are incorporated into a compact solid system housing. VIBRATING FEEDER The design of the imbalance vibrating feeder is entirely geared to the ECSM units. The trough is made of stainless steel AISI304. The vibrating feeders are available in 2 standard lengths: 1,500 resp. 2,500...

B A K K E R M A G N E T I C S [12] M A G N E T R O T O R Bakker Magnetics has at its disposal simulation software for Windows, allowing you for example, to visualise discharge curves. This software also offers the facility for making grade/recovery calculations. After consultation it can be obtained on a CD-ROM.

M A G N E T R O T O R [13] B A K K E R M A G N E T I C S [ M A G N E T R O T O R ] The magnet system of the induction rotor is composed of the strongest magnets currently available: Neodymium quality BM 42. In order to realise the narrowest possible air gap, each individual magnet has a radius. The pole pairs have been optimised using special software for computer simulation, resulting in a very strong alternating magnet field. These properties have led to a very important increase in the effectiveness of Bakker Magnetics’ non-ferrous separators. Higher machine speeds are possible if the magnet...

T E C H N I C A L D A T A + P R A C T I C A L E X A M P L E S [15] B A K K E R M A G N E T I C S [ T E C H N I C A L D A T A + P R A C T I C A L E X A M P L E S ] D A T A + P R A C T I C A L E X A M P L E S particle-size than the other exerted forces. The table above shows the dependency of the different forces as a function of the particle-size (dp). From this we can deduce that a selective separation of various metals and non-metals in a rotating eddy current separator is determined by the competition between the eddy current force on the one hand and the remaining forces on the other. In a...

B A K K E R M A G N E T I C S [16] T E C H N I C A L D A T A + P R A C T I C A L E X A M P L E S "VISUALISATION OF MAGNETIC INDUCTION" 18-POLE ECSM-MOTOR "MAGNETIC FLUX PLOT" 18-POLE ECSM -MOTOR

T E C H N I C A L D A T A + P R A C T I C A L E X A M P L E S [17] B A K K E R M A G N E T I C S T E C H N I C A L D A T A + P R A C T I C A L E X A M P L E S CHARACTERISTICS OF NON-FERROUS EDDY CURRENT SEPARATION Type of metal Electr. Density Ratio conductivity Aluminium 0,35 2,7 13,0 Copper 0,59 8,9 6,7 Silver 0,63 10,5 6,0 Zinc 0,17 7,1 2,4 Brass 0,14 8,5 1,7 Tin 0,09 7,3 1,2 Lead 0,05 11,3 0,4 Best results are obtained with electrical highconducting non-ferrous metals with a low specific weight. MAIN FIELDS OF APPLICATION FOR EDDY CURRENT SEPARATORS Flow of materials Magnet rotor type Particle-size...