Block Magnet- Brochure

B M I N D U S T R I A L M E T A L S E P A R A T I O N S Y S T E M SSeparation systems for waste processing and recycling industries [for ferrous and non-ferrous metals]C O N T E N T S L I S TBusiness profile 3Metal separation systems 4BM delivery programme 6Modular system concept 8Magnet rotor 12Technical data + Practical examples 14ECSM non-ferrous separation systems 18Overbelt magnet systems 20Drum magnet systems 24Headroller magnet systems 28Block magnets 30[ ]3 B A K K E R M A G N E T I C SB U S I N E S S P R O F I L E [ B U S I N E S S P R O F I L E ]Gerard H. Bakker founded the company in 1971. Since itsinception the company has enjoyed a continuous controlledgrowth. From the beginning we have focused onstrengthening and expanding the Marketing and Salesorganisation. At present, Bakker Magnetics is active in a largenumber of countries throughout the world. In order to beable to offer maximum service and support locally tocustomers in the application of our products, we have, overthe years, established facilities in Belgium, Germany, France,Great Britain, Norway and Spain. In addition we haveestablished a fine network of carefully chosen specialisedlocal distributors in Europe, the United States and in the FarEast.Next to the Sales organisation, Bakker Magnetics hasinvested heavily in technical knowledge. A specialised andwell-trained staff of engineers forms the backbone of thecompany. The development of new products and theoptimisation of existing ones are the ongoing processeswithin the company. Where necessary or when required, weB U S I N E S S P R O F I L EAccredited by theDutch Council forAccreditationISO 9001GERARD H. BAKKER & GEERT-JAN BAKKERBAKKER MAGNETICS, SPECIALISTS IN MAGNETS AND MAGNET SYSTEMSBakker Magnetics has been active as a supplier and manufacturer of magneticmaterials and industrial systems for over 25 years. During that period the companyhas evolved into one of the leading manufacturers in this field in Europe. Quality,innovation, supply reliability, the product range and service have constituted the mainpillars of strength over the years.will work in conjunction with research centres, both at homeand abroad, in order to expand the field of knowledge, andto maintain this level. Also our customers can benefit fromthe knowledge gathered by Bakker Magnetics. Experiencedapplication engineers are able to support the manufacturersof products requiring magnets and magnet systems, in orderto optimise these products.In the eighties, Bakker Magnetics was one of the firstcompanies in this field to introduce the computer for finiteelement calculations of complex magnet systems. Apart froma considerable reduction in the development time, thequality level was also distinctly enhanced. At the same timeCAD-systems and systems for the statistical processing ofmeasuring data were also introduced. The international leadthat Bakker Magnetics has established in this area, is bestreflected in the vast export share of the total turnover.An integrated quality control process within the BakkerMagnetics organisation guarantees the quality level of allcompany disciplines from development, production andlogistics through to sales and service. Therefore, it is not surprising that Bakker Magnetics was thefirst company in this field to be awarded ISO 9001certification for total integral quality procedures within thecompany.The procedures needed for Bakker Magnetics obtaining QS9000 certification are currently at an advanced stage ofdevelopment.M E T A L S E P A R A T I O N S Y S T E M SW A S T E P R O C E S S I N G A N D R E C Y[ ]4 M E T A L S E P A R A T I O N S Y S T E M S B A K K E R M A G N E T I C S[ ]5 B A K K E R M A G N E T I C SM E T A L S E P A R A T I O N S Y S T E M 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 hasevolved from an environmental necessity into an industry,allowing profitable returns. Because of price-rises in rawmaterials and the development of new techniques in recentyears, recovery of useful materials from waste flows hasbecome an economic industry of increasing importance.Moreover, the energy required for recycling metals such asiron, aluminium and similar metals has proved to be afraction of the energy needed for processing ores to "new"metals. Apart from aspects such as the environment and therecycling of raw materials, other considerations play a role inthe removal of metals during industrial processes such as theprotection of expensive machinery against damage, causedby metal particles in the material flows. This brochure givesan idea of the state of technical development in metalremoval systems, suitable for entering the new millennium.In this regard an important role is reserved for the eddycurrent non-ferrous metal removing systems.CYCLE: FROM WASTE PROBLEM TO AN ECONOMIC PROFITABLE INDUSTRYSociety produces an enormous amount of waste matter. Particularly the use ofpackaging materials has increased to a large extent in recent times. Initially this wastewas taken to refuse dumps. However, different authorities needed to put a check tothis procedure as it became obvious that the limits in this growth of waste had beenreached. A reduction in the amount of waste could be achieved by incineration. It wasconcluded that the mountain of waste contained many useful materials suitable forrecycling. Especially as non-ferrous metals are so valuable, separation proved to bevery profitable. Various methods and techniques are being applied in order to separateuseful materials from the waste flow.F O RY C L I N G I N D U S T R I E SPeople continue to recognise that it is the consumer whoshould separate waste products initially. Separation of paper,glass, chemical and kitchen and garden waste by theconsumer has proved very positive. At this stage, furtherseparation is not efficient. The residual waste, not countingthe afore-mentioned waste matter, is suitable for furtherseparation by the waste processing industry. Beforeincineration this residual waste often goes through aseparation process. After arriving at the waste processingplant, useful components are removed from the waste flow.In this regard, ferrous metals such as iron, sheet metal, steel,etc. are of main consideration. For this purpose de-ironingsystems, such as drum magnet and overbelt magnet systemsare available. Subsequently an eddy current removing systemmakes it possible to remove non-ferrous metals from thewaste flow.Separation preceding incineration has the advantage of anincreased yield, e.g. of aluminium, of which a significant partis lost during incineration.In addition, separation following incineration requires asignificantly larger net throughput.[ ]6 B M D E L I V E R Y P R O G R A M M EB A K K E R M A G N E T I C S1 2 3 4[ ]7 B A K K E R M A G N E T I C SB M D E L I V E R Y P R O G R A M M E[ 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 MAGNETSThe drum magnet, also called separation drum, contains twosectors: a magnetic and a non-magnetic sector. Around thissystem a drum rotates onto which the flow of materials isdropped. This material flow is fedd onto the magnetic sectorof the drum. The magnetic field forces the iron particles toremain longer on the drum. The iron will drop after a delay,after leaving the magnetic sector, so that it can be collectedseparately. Bakker Magnetics’ drum magnets are standard,equipped with a strong permanent magnet system. Alsodrum magnets in a housing can be supplied as standard. [3]BM HEADROLLER MAGNETSThe magnetic headroller can serve instead of the drive roll atthe dumping point of the conveyor belt. The image clearlyshows that the magnetic headroller attracts the iron particlesfrom the flow of materials, after which they are transportedto the lower part of the conveyer belt. As the iron leaves thehead-roll further down than the non-attracted matter, it canbe collected separately. Bakker Magnetics’ headroller magnetsare standard, equipped with a strong permanent magnetsystem. [4]BM BLOCK MAGNETSBM block magnets can be applied to de-iron material flowson conveyor belts, at a free fall, on guide plates, vibratingfeeders, etc. Bakker Magnetics’ block magnets are standard,equipped with a strong permanent magnet system.Electromagnetic systems can be delivered on request. [5]BM EDDY CURRENT SEPARATING SYSTEMSThe principle of the action of the eddy current separating systems is based on thedifference in electric conduction of metals and non-metals. With the eddy currentseparator a belt conveyor leads the waste flow towards a fast rotating inductionpulley with a large number of magnets, arranged in opposite pairs of pole pitches.The induction rotor produces a rapidly alternating magnetic field, causing an eddycurrent of the metal particles in the waste flow. This eddy current works in theopposite direction to the nearest pole of a magnet in the induction roll.B M D E L I V E R Y P R O G R A M M EAs is well known, equal poles exert a repulsive force throughwhich the metal particles are actually launched out of the wasteflow. Materials with a comparatively weak conduction arehardly or not influenced by the generated magnetic field andtherefore drop straight down. Depending on the density themetal parts are bent out of the waste flow. In practice anoptimal removal can be achieved through adjustment of theseparator. In addition, apart from the electrical properties, thedensity of the material to be removed must also be taken intoaccount. [1]Eddy current separating systems of the previous generationwere only capable of separating larger non-ferrous particles,exceeding ca. 9 mm, from the waste. Bakker Magnetics’new generation separators however have a significantincreased yield, since particles as small as 2 mm can now beremoved successfully from the waste flow.In addition a "wet eddy current removal system" is in thefinal stage of the development trajectory. This patentedsystem makes it possible to separate even smaller particles.BM OVERBELT MAGNET SYSTEMSOverbelt magnet systems are mainly used to de-ironmaterials on conveyor belts.For this purpose they areplaced above the conveyorbelt. The magnet systemremoves the iron particles fromthe passing flow of waste. Abypass belt moves the ironparticles out of the magneticfield, through which theparticles drop so that they canbe collected.5[ ]8 M O D U L A R S Y S T E M C O N C E P TB A K K E R M A G N E T I C S[ ]9 B A K K E R M A G N E T I C SM O D U L A R S Y S T E M C O N C E P T[ M O D U L A R S Y S T E M C O N C E P T ]ST R U C T U R E O F T H E N O N-F E R R O U SS E PA R AT I O N S Y S T E MThe base of the modular system consists of two steel supportgirders, which, together with the box girders, make up theframe of the system.Both sides of the frame have mounting plates for assemblingthe modular separation units, a vibrating feeder and/or amagnet drum for removing the iron particles from the flow ofmaterial. This base ensures a solid and stable seat for thesystem. Great attention has been paid to an effective seal , toprevent pollution in the various parts caused by dustformation. For this the system is fitted with a two-sided dustseal. Also for the driving and reverse drum measures areprovided to avoid pollution.CO N V E Y O R B E LT W I T H I N T E G R AT E D M A G N E TR O T O RThe conveyor belt is controlled by means of a curved driveroll. The belt tension can be adjusted easily. Two switches,mounted at the bottom side of the conveyor, monitor therunning of the belt. It is driven by a loose, 2.2 kW motor,which is installed onto a sledge on the inside of theconveyor. Driving takes place by an entirely shielded drivebelt. The conveyor itself is a heatproof, wear-resistant PUbelt, fitted with carriers and edges. The induction roll, alsocalled magnet rotor, is built into a glass-fibre reinforcedpolyester reverse drum, which is covered with a ceramiccoating.Bakker Magnetics’ new, recently introduced generation eddy current non-ferrousseparators, have been incorporated in a modular system concept. This means that thevarious system elements can be mounted in the same base frame. This concept allowsyou to modify the configuration of the removal system, quickly and efficiently. Inaddition to this the modular structure makes it possible to incorporate (elements of) thesystem easily into existing plants. This construction also significantly simplifiesmaintenance of the system, allowing easy replacement, e.g. of the conveyor and thereverse drum.M O D U L A R S Y S T E M C O N C E P T[ see the pictures on page 10 ][ ]10 M O D U L A R S Y S T E M C O N C E P TB A K K E R M A G N E T I C SSTRUCTURE OF THE NON-FERROUSSEPARATION SYSTEMCONVEYOR BELT WITH INTEGRATEDMAGNET ROTOR.SEPARATION UNITS SYSTEM CONTROL [ ]11 B A K K E R M A G N E T I C SM O D U L A R S Y S T E M C O N C E P T[ 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 conveyorbelt and another 7.5 kW control with brake option fordriving the induction roll.Four different pre-select settings can be entered.These parts are incorporated into a compact solid systemhousing.VI B R AT I N G F E E D E RThe design of the imbalance vibrating feeder is entirelygeared to the ECSM units.The trough is made of stainless steel AISI304. The vibratingfeeders are available in 2 standard lengths: 1,500 resp. 2,500mm.DR U M M A G N E TThe drum magnet links up perfectly with the modular design ofboth the ECSM conveyor belt and the vibrating feeders.The supplied support beams must be used if the drum magnetneeds to be positioned directly before the conveyor belt. If thedrum magnet has to be placed in front of the vibrating feeder,this must be mounted onto the support frame of the hopper.The standard system is equipped with a drive motor and adivision plate.SE PA R AT I O N U N I T SThe separation unit is available in 3 different models,depending on the product and the capacity.The separating plate can be adjusted quickly and easily toalmost every position and angle of inclination, using the'fast-click' positioning system. In this way construction partsdo not obstruct the flow of materials.TH E S Y S T E M C O N T R O LThe heart of the system control consists of a SiemensProgrammable Logic Controller. This PLC contains thepowerful CPU (the Central Processing Unit). Through theapplication of this modern PLC, the number of settings onthe non-ferrous separator has extended enormously. It canbe operated easily and the results of the settings aredisplayed on an LCD backlight screen. The settings can beread out in three languages: English, Dutch and German(other languages possible). As the status of the unit ismonitored continuously, a safe, effective and reliableoperation is guaranteed. Failures and maintenance intervalsare reported on the LCD display as well. The softwareprovides 3 password levels. Apart from the digital operation,the control panel has two continuously variable frequencyVIBRATING FEEDER DRUM MAGNET[ ]12 M A G N E T R O T O RB A K K E R M A G N E T I C SBakker Magnetics has at its disposal simulation software forWindows, allowing you for example, to visualise dischargecurves. This software also offers the facility for makinggrade/recovery calculations. After consultation it can beobtained on a CD-ROM.[ ]13 B A K K E R M A G N E T I C SM A G N E T R O T O R[ M A G N E T R O T O R ]The magnet system of the induction rotor is composed of thestrongest magnets currently available: Neodymium qualityBM 42. In order to realise the narrowest possible air gap,each individual magnet has a radius. The pole pairs havebeen optimised using special software for computersimulation, resulting in a very strong alternating magnetfield. These properties have led to a very important increasein the effectiveness of Bakker Magnetics’ non-ferrousseparators. Higher machine speeds are possible if the magnetsystem inside the induction rotor is centred, allowing asignificantly larger effective range of a centric magnet systemcompared to an excentric positioning. This has a positiveeffect on the system's capacity. Also the settings of thesystem do not need to be modified, even if the compositionof the flow of materials changes. Great attention has beenpaid to the durability and reliable functioning of theinduction roll and the reverse drum. The reverse drum ismade of glass-fibre reinforced polyester, which is coveredwith a ceramic coating. The drum to a great extent is heat-resistant. INDUCTION ROTORThe high-speed induction roll provided with an R-glass or a stainless steel outerjacket, is integrated in the reverse drum. The speed of rotation of the induction rotorcan be adjusted continuously and is variable from 500 up to 3000 rpm. The speed islimited electronically to 3000 rpm. The final checks take place at 3500 rpm. Theinduction rotor has a 7.5 kW Euronorm drive gear and completely shielded sideplating. This motor is mounted on the inside of the conveyor belt.M A G N E T R O T O RADVANTAGES OF A CENTRICALLY PLACED MAGNET ROTORCOMPARED TO AN EXCENTRICALLY PLACED SYSTEM: • NON-FERROUS PARTICLES ARE LIABLE TO REMAIN IN THEMAGNETIC FIELD FOR A LONGER TIME; THIS LARGERWORKING RANGE RESULTS IN A BETTER GRADE/RECOVERYRATIO.• AS A RESULT OF THE NARROW AIR GAP, THE SEPARATIONEFFICIENCY APPLIES ESPECIALLY TO THE SMALLER PARTICLES.• THE ROTOR POSITION DOES NOT NEED TO BE ADJUSTED.Centrically placed magnet rotorExcentrically placed magnet rotorT E C H N I C A L[ ]14 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 SB A K K E R M A G N E T I C S[ ]15 B A K K E R M A G N E T I C ST 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[ 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 Sparticle-size than the other exerted forces. The table aboveshows the dependency of the different forces as a function ofthe particle-size (dp).From this we can deduce that a selective separation of variousmetals and non-metals in a rotating eddy current separator isdetermined by the competition between the eddy current forceon the one hand and the remaining forces on the other. In ametal/non-metal removing system, making use of a rotatingeddy current magnet rotor,the following relations apply in orderto realise a selective separation.Fce >> RnF cic FNCe << RnFNCici=1 i=1Here Fce is the eddy current force exerted on a conductor, FNCe isthe eddy current force exerted on a poor conductor or a non-conductor, F cic constitutes the remaining forces on a conductor,whilst FNCic represents the remaining forces on a poorconductor or a non-conductor. This means that theremaining forces primarily determine the discharge curve ofpoor and/or non-conductors, whereas eddy current forcesmainly define the discharge curve of conductors. The aboveanalysis shows that in practice it can be important to pre-sieve the flow of materials in advance, in order to get thebest results. Bakker Magnetics’ ECSM units are extremelysuitable for removing various metals from non-metals.PRINCIPLE OF THE EDDY CURRENT SEPARATING TECHNOLOGYIn contrast to the rather simple magnet separation, the principle of eddy currentseparating technology is complex. In order to get a clear insight into the separationtechnology which push away the metal particles instead of attracting them as is thecase with iron particles, one needs to know that Faraday's law of induction appliesto magnetic fields. This basic electromagnetic law states that a time-independentmagnetic field can induce eddy currents in an electrically conductive particle due tothe presence of induced electric field.According to the Biot-Savart’s law, the eddy currents will inreturn result in magnetic fields that oppose the inducingfields, thereby giving rise to eddy current forces. For a largeconductor, say more than 10 mm in diameter, this is themajor driving force pushing away the conductor from non-conductive particles. The eddy current force on a conducting particle is in effectthe Lorentz force. For a sufficiently small volume of aconductor carrying a current density j in a magnetic field Ba,Ba can be calculated as folows:ƒ = j x Ba dVIf the current density distribution within a particle is known,this force on the particle could be calculated easily byintegrating its volume V:F = ? v ƒ= ? v j x Ba dVThe torque T, exerted by the magnetic field on the conductiveparticle, can be determined using the following formula:T = ? v r x ƒ= ? v r x (j x Ba) dVIn this formula r represents the distance to the mass centre ofthe particle.The acceleration, caused by eddy current forces on sphericalaluminium particles of different sizes, has been calculated forthe Bakker Magnetics 18-pole magnet rotor. The results areshown in the above graph.In this graph ar represents the radial acceleration due to theradial component of the eddy current force, at is the tangentialacceleration due to the tangential component of the eddycurrent force and aT is the acceleration component, caused bythe exerted eddy current torque.The results show that for smaller particles (< 5 mm) the radialforce is the dominant force in particle acceleration, whilst theeddy current torque makes the particles rotate. The reasonwhy the size of the particles is the most significant variable, isdue to the fact that eddy current forces depend more on thea ra taT0 5 10 15 20 25 30 35 40 45 50 552502002 150100100500,m/saccela?0kwdrum ?R2ACCELERATION OF ALUMINIUM PARTICLES, CAUSED BYEDDY CURRENT FORCES, CALCULATED FOR THE BAKKERMAGNETICS 18-POLE MAGNET ROTOR.Name Symbol RelationRadial eddy current force Fr Fr ~ dp7Tangential eddy current force Ft Ft ~ dp5Force from eddy current torque FT FT ~ dp4Force of gravity Fg Fg ~ dp3Resistant force Fdrag Fdrag ~ dp2DEPENDENCY OF THE PARTICLE-SIZE FOR THE VARIOUS FORCES[ ]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 SB A K K E R M A G N E T I C S"VISUALISATION OF MAGNETIC INDUCTION"18-POLE ECSM-MOTOR"MAGNETIC FLUX PLOT" 18-POLE ECSM -MOTOR[ ]17 B A K K E R M A G N E T I C ST 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 ST 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 SC H A R A C T E R I S T I C S O F N O N - F E R R O U S E D D YC U R R E N T S E PA R AT I O NType of metal Electr. Density Ratioconduc-tivityAluminium 0,35 2,7 13,0Copper 0,59 8,9 6,7Silver 0,63 10,5 6,0Zinc 0,17 7,1 2,4Brass 0,14 8,5 1,7Tin 0,09 7,3 1,2Lead 0,05 11,3 0,4Best results are obtained with electrical high-conducting non-ferrous metals with a low specificweight.M A I N F I E L D S O F A P P L I C AT I O N F O R E D D Y C U R R E N T S E PA R AT O R SFlow of materials Magnet rotor type Particle-size CapacityDomestic waste 12 + ~ 30 mm. 150 m3/uScrap from electronic equipment 18 - ~ 30 mm. 50 m3/uRecycling of kitchen appliances 12 + ~ 30 mm. 150 m3/uShredded wood 12 + ~ 30 mm. 200 m3/u18 - ~ 30 mm. 100 m3/uShredded plastics 12 + ~ 30 mm. 160 m3/uCar scrap 12 + ~ 30 mm. 80 m3/u18 + ~ 10 ? 30 mm. 60 m3/u18 - ~ 10 mm. 40 m3/uIncineration slags 18 variabel 40-80 m3/uRecycling glass 18 + ~ 20 mm. 50 m3/uCable scrap 18 - ~ 30 mm. 50 m3/uBottom ashes 12 + ~ 30 mm. 80 m3/u18 + ~ 10 ? 30 mm. 60 m3/uThe above-mentioned (guidelines for) capacities apply to an ECSM unit, type 1500.[ ]18 E C S M N O N - F E R R O U S S E P A R A T I O N S Y S T E M SB A K K E R M A G N E T I C SDR U M M A G N E T:Drum stainless steel AISI 304 provided with carriers.1 pce. stationary axle journal for positioning the magnetic unit.1 pce. rotating axle journal for drum drive.Driving gear Slip-on gear motor.Available with a ceramic or neodymium magnet system.Magnetic zone 180°.VI B R AT I N G F E E D E R :Execution imbalance vibrating feeder.solid construction.The trough is placed on 4 steel springs or rubber shock absorbers. Driving gear situated to underside of troughMaterial trough stainless steel AISI304.ECSM U N I T S :Belt speed Continuously variable adjustable from 0,26 up to 2,00 metres/second.Belt material Wear-resistant heatproof PU belt.Belt driving Separate driving gear on a sledge on the inside of the belt conveyor.Reverse drum Made of glass-fibre reinforced polyester covered with a ceramic coating.Speed of rotation Continuously variable adjustable from 500 - 3000 rpm.Rotor driving Separate driving gear on a sledge on the inside of the belt conveyor.SE PA R AT I O N U N I T S :The division plate can be adjusted quickly and easily to almost every position and angle of inclination, using the 'fast-click'positioning system. This ensures that construction parts do not obstruct the flow of materials.SW I T C H B O A R D:Electrical connection 3 x 380 V 50 HzControl current transformer 400/220 400 VAOperating system Siemens PLC, buffer battery and E-prom.LCD screen with texts in different languages.Ambient conditions Environmental temperature 0 - 35 °CRelative humidity max. 85 %Transport temperature -25 › +55 °CDust-freeDimensions of 1200 x 800 x 300 mm (lxwxh), support 100 mm.system cabinet Provided with internal fan with outlet filter[ ]19 B A K K E R M A G N E T I C SE C S M N O N - F E R R O U S S E P A R A T I O N S Y S T E M SArt. N° : A B C D E F G Weight CapacityBM 29.711/20/1500 1.500 400 500 1.280 1.480 885 1130 330 kg. 2x0,7 kWBM 29.711/20/2500 2.500 400 500 1.280 2.480 1.885 1130 400 kg. 2x0,7 kWBM 29.713/20/1500 1.500 700 800 1.580 1.480 885 1430 390 kg. 2x0,7 kWBM 29.713/20/2500 2.500 700 800 1.580 2.480 1.885 1430 560 kg. 2x1,2 kWBM 29.714/20/1500 1.500 900 1.000 1.780 1.480 885 1630 700 kg. 2x1,2 kWBM 29.714/20/2500 2.500 900 1.000 1.780 2.480 1.885 1630 810 kg. 2x1,2 kWBM 29.715/20/1500 1.500 1.100 1.200 1.980 1.480 885 1830 980 kg. 2x1,2 kWBM 29.715/20/2500 2.500 1.100 1.200 1.980 2.480 1.885 1830 1.380 kg. 2x1,7 kWBM 29.716/20/1500 1.500 1.400 1.500 2.280 1.480 885 2130 1.540 kg. 2x1,7 kWBM 29.716/20/2500 2.500 1.400 1.500 2.280 2.480 1.885 2130 1.900 kg. 2x1,7 kW[ E C S M N O N - F E R R O U S S E P A R A T I O N S Y S T E M S ]D R U M M A G N E T S Y S T E M SArt. N° : F M Weight CapacityBM 29.711/30 350 1.130 135 kg. 0,55 kWBM 29.713/30 650 1.430 185 kg. 0,55 kWBM 29.714/30 850 1.630 210 kg. 0,55 kWBM 29.715/30 1.050 1.830 245 kg. 0,55 kWBM 29.716/30 1.350 2.130 280 kg. 0,55 kWV I B R A T I N G F E E D E R SE C S M - U N I T SArt. N°: A B C WeightBM 29.711 500 1.130 1.340 1.145 kg.BM 29.713 800 1.430 1.640 1.290 kg.BM 29.714 1.000 1.630 1.840 1.385 kg.BM 29.715 1.200 1.830 2.040 1.470 kg.BM 29.716 1.500 2.130 2.340 1.630 kg.S E P A R A T I O N U N I T SArt. N°: Type A B C D E F WeightBM 29.711/85/1 S-500 1.145 980 510 785 745 1.130 140 kg.BM 29.711/85/2 N-500 1.645 980 910 1.315 1.035 1.130 200 kg.BM 29.711/85/3 L-500 2.245 980 1.510 1.915 1.298 1.130 275 kg.BM 29.713/85/1 S-800 1.145 1.280 510 785 745 1.430 155 kg.BM 29.713/85/2 N-800 1.645 1.280 910 1.315 1.035 1.430 220 kg.BM 29.713/85/3 L-800 2.245 1.280 1.510 1.915 1.298 1.430 300 kg.BM 29.714/85/1 S-1000 1.145 1.480 510 785 745 1.630 170 kg.BM 29.714/85/2 N-1000 1.645 1.480 910 1.315 1.035 1.630 235 kg.BM 29.714/85/3 L-1000 2.245 1.480 1.510 1.915 1.298 1.630 310 kg.BM 29.715/85/1 S-1200 1.145 1.680 510 785 745 1.830 180 kg.BM 29.715/85/2 N-1200 1.645 1.680 910 1.315 1035 1.830 250 kg.BM 29.715/85/3 L-1200 2.245 1.680 1.510 1.915 1.298 1.830 330 kg.BM 29.716/85/1 S-1500 1.145 1.980 510 785 745 2.130 200 kg.BM 29.716/85/2 N-1500 1.645 1.980 910 1.315 1.035 2.130 270 kg.BM 29.716/85/3 L-1500 2.245 1.980 1.510 1.915 1.298 2.130 350 kg.Adjustment reach (X x Y) of the division plate:Type S : 770 x 430 mm. • Type N : 1.300 x 800 mm. • Type L : 1.900 x 1.000 mm.E C S M N O N - F E R R O U S S E P A R A T I O N S Y S T E M SF L O W[ ]20 O V E R B E L T M A G N E T S Y S T E M SB A K K E R M A G N E T I C S[ ]21 B A K K E R M A G N E T I C SO V E R B E L T M A G N E T S Y S T E M S[ O V E R B E L T M A G N E T S Y S T E M S ]PE R M A N E N T O V E R B E LT M A G N E T S Y S T E M SThis Bakker Magnetics type of de-ironing system is providedwith a powerful permanent magnetStandard overbelt magnet systems (up to the 320 series), aredriven by a drum motor. Models from the 400 and 500 series are standard equippedwith drive through a slip-on gear motor. On request theoverbelts from the 220 series can be supplied with a motorreductor (add "/21" to the Art. N°). The systems areprovided with a tensioning device. As the drums are curved,the running of the belt is self-guided. The belt is made ofsynthetic rubber with vulcanised idlers. The electricalconnection meets the IP 54 standards, or IP 65 if required,standard equipped for 3 x 380 V 50 Hz. Systems withdeviating power connection can be supplied as well. Modelswith an extended construction are available. Here theextension of the main magnet pole is provided with atransport pole, producing a field fluctuation. This fieldfluctuation rotate the iron particles on the belt through whicheventual material particles, clamped by the iron pollution, getthe opportunity to return into the flow of materials. In thisway a pure iron fraction is left. Models with an extendedconstruction can be installed solely in the longitudinaldirection of the conveyor belt. At the 400 and 500 series therubber conveyor belt between the idlers is provided with anextra wear-resistant layer (Correx blue 45° shore).Overbelt magnet systems are mainly used to separate materials on conveyor belts. Forthis purpose they are suspended above the conveyor belt. The magnet system removesthe ferrous particles from the passing flow of materials. After leaving the magneticsector, these iron particles are dropped into a receptacle. At the active side the magnetis shielded by a stainless steel wearing plate. This type of separating system is oftenused in industry, to avoid machinery, such as shredders, being damaged by the ironparticles. Bakker Magnetics’ overbelt magnet systems are supplied in permanentmagnetic and electromagnetic versions.O V E R B E L T M A G N E T S Y S T E M S[ ]22 O V E R B E L T M A G N E T S Y S T E M SB A K K E R M A G N E T I C S[ O V E R B E L T M A G N E T S Y S T E M S ]O V E R B E L T M A G N E T S Y S T E M SMotorpower WeightArt. N° A B C D E F G H (kW) (kg)BM 28.001 450 955 530 640 520 420 310 130 0,55 153BM 28.002 650 1155 530 640 720 420 310 130 0,55 197BM 28.003 850 1355 530 640 920 420 310 130 0,55 242135 seriesO V E R B E L T M A G N E T S Y S T E M SMotorpower WeightArt. N° A B C D E F G H (kW) (kg)BM 28.101 240 1050 850 1015 430 650 505 180 1,1 335BM 28.102 300 1150 850 1015 530 650 505 180 1,1 375BM 28.103 360 1250 850 1015 635 650 505 180 1,1 420BM 28.104 420 1355 850 1015 735 650 505 180 1,1 470BM 28.105 475 1455 850 1015 835 650 505 180 1,1 515BM 28.106 535 1555 850 1015 935 650 505 180 1,1 560BM 28.107 595 1655 850 1015 1040 650 505 180 1,1 600BM 28.108 655 1755 850 1015 1140 650 505 180 1,1 650BM 28.109 715 1860 850 1015 1250 650 505 180 1,1 695BM 28.110 775 1960 850 1015 1350 650 505 180 1,1 740BM 28.111 830 2060 850 1015 1450 650 505 180 1,1 785BM 28.130 240 1050 1050 1225 430 900 810 180 1,5 470BM 28.131 300 1150 1050 1225 530 900 810 180 1,5 545BM 28.132 360 1250 1050 1225 635 900 810 180 1,5 620BM 28.133 420 1355 1050 1225 735 900 810 180 1,5 695BM 28.134 475 1455 1050 1225 835 900 810 180 1,5 765BM 28.135 535 1555 1050 1225 935 900 810 180 1,5 840BM 28.136 595 1655 1050 1225 1040 900 810 180 1,5 915BM 28.137 655 1755 1050 1225 1140 900 810 180 1,5 990BM 28.138 715 1860 1050 1225 1250 900 810 180 1,5 1060BM 28.139 775 1960 1050 1225 1350 900 810 180 1,5 1140BM 28.140 830 2060 1050 1225 1450 900 810 180 1,5 1210220 seriesO V E R B E L T M A G N E T S Y S T E M SMotorpower WeightArt. N° A B C D E F G H (kW) (kg)BM 28.010 600 1705 975 1125 835 700 610 247 2,2 734BM 28.011 800 1910 975 1125 1040 700 610 247 2,2 891BM 28.012 1000 2120 975 1125 1250 700 610 247 2,2 1048BM 28.013 1200 2320 975 1125 1450 700 610 247 2,2 1250BM 28.014 1400 2520 975 1125 1650 700 610 247 2,2 1363BM 28.020 600 1705 1175 1325 835 900 810 247 2,2 930BM 28.021 800 1910 1175 1325 1040 900 810 247 2,2 1136BM 28.022 1000 2120 1175 1325 1250 900 810 247 2,2 1342BM 28.023 1200 2320 1175 1325 1450 900 810 247 2,2 1548BM 28.024 1400 2520 1175 1325 1650 900 810 247 2,2 1754320 seriesABCDEFGHO**= 135/220/320 mm[ ]23 B A K K E R M A G N E T I C SO V E R B E L T M A G N E T S Y S T E M S[ O V E R B E L T M A G N E T S Y S T E M S ]O V E R B E L T M A G N E T S Y S T E M SMotorpower WeightArt. N° A B C D E F G H (kW) (kg)BM 28.030 600 1885 1220 1490 835 900 810 350 2,2 1336BM 28.031 800 2090 1220 1490 1040 900 810 350 2,2 1622BM 28.032 1000 2300 1220 1490 1250 900 810 350 2,2 1789BM 28.033 1200 2500 1220 1490 1450 900 810 350 2,2 2194BM 28.034 1400 2700 1220 1490 1650 900 810 350 2,2 2481BM 28.035 1600 2900 1220 1490 1850 900 810 350 2,2 2767400 seriesABCDEFGHO**= 400/500O V E R B E L T M A G N E T S Y S T E M SMotorpower WeightArt. N° A B C D E F G H (kW) (kg)BM 28.040 600 2085 1350 1640 835 1050 900 410 2,2 1758BM 28.041 800 2290 1350 1640 1040 1050 900 410 2,2 2135BM 28.042 1000 2500 1350 1640 1250 1050 900 410 2,2 2512BM 28.043 1200 2700 1350 1640 1450 1050 900 410 2,2 2819BM 28.044 1400 2900 1350 1640 1650 1050 900 410 3,0 3266BM 28.045 1600 3100 1350 1640 1850 1050 900 410 3,0 3642BM 28.046 1800 3300 1350 1640 2050 1050 900 410 3,0 4019BM 28.047 2000 3500 1350 1640 2250 1050 900 410 3,0 4369500 seriesO V E R B E L T M A G N E T S Y S T E M SC A T C H F I E L D D E P T H SArt. N° bar ø bar ø nut 5x25 5x75 M1628.001 t/m 28.003 165 225 13028.101 t/m 28.111 255 370 18028.130 t/m 28.140 260 380 19528.010 t/m 28.014 295 430 22528.020 t/m 28.024 315 460 24028.030 t/m 28.035 335 480 25028.040 t/m 28.047 360 500 275B M 2 8 . 0 0 1 t / m 2 8 . 0 2 4B M 2 8 . 0 3 0 t / m 2 8 . 0 4 7[ ]24 D R U M M A G N E T S Y S T E M SB A K K E R M A G N E T I C S[ ]25 B A K K E R M A G N E T I C SD R U M M A G N E T S Y S T E M S[ D R U M M A G N E T S Y S T E M S ]The drum is made of stainless steel and has both a rotatingand a stationary axle journal. The rotating axle journal isdriven. The magnet field is positioned in conjunction with thestationary axle journal . The magnetic field here is 180°.Bearing blocks are supplied.Drum magnets are provided with a permanent ceramicmagnet system. Models with a 215 and 315 mm drum borecan be supplied with a very powerful neodymium magnetsystem (add "/01" to the article N°). All models are almostmaintenance free.DR U M M A G N E T S I N H O U S I N G.This magnet system, comprising a drum magnet in a solidhousing can be incorporated easily into (existing) installations.The parts, which are exposed to the flow of materials, aremade of extremely wear-resistant materials. This makes thesystem very suitable to de-iron extremely abrasive materials. Aslip-on gear motor drives the separation drum. Next to thestandard model, which is provided with a ceramic magnetsystem, these models can be supplied with a very powerfulneodymium magnet system (add "/01" to the article N°).The drum magnet, also called separation drum, contains two sectors: a magnetic and anon-magnetic sector. Around this system a drum rotates onto which the materials aredropped or passed on. For an effective removal, this drum is provided with idlers. Thewaste is fedd onto the magnetic sector of the drum. The magnetic field forces the ironparticles to remain longer on the drum. As they leave the drum further down, they canbe collected separately.D R U M M A G N E T S Y S T E M S[ ]26 D R U M M A G N E T S Y S T E M SB A K K E R M A G N E T I C S[ D R U M M A G N E T S Y S T E M S ]ABDEFGHIJKLMNOK A R A K T E R I S T I E K E P A R A M E T E R S B I J E D D Y - C U R R E N T N O N - F E R R OD R U M M A G N E T SArt. N° ø max. recomm. min. motor A B D E F G H I J K L M N weightcapacity RPM power (kg)(m3/h) (kW)BM 29.045 215 5 40 0,25 400 500 650 215 150 50 50 12 8 28 60 135 50 85BM 29.046 215 6 40 0,25 500 600 750 215 150 50 50 12 8 28 60 135 50 95BM 29.047 215 8 40 0,25 650 750 900 215 150 50 50 12 8 28 60 135 50 120BM 29.048 215 10 40 0,25 800 900 1050 215 170 60 50 14 10 32 80 135 50 135BM 29.049 215 12 40 0,25 1000 1100 1250 215 170 60 50 14 10 32 80 135 50 165BM 29.050 315 12 40 0,25 400 500 680 320 170 60 50 14 10 35 80 160 50 100BM 29.051 315 15 40 0,25 500 600 780 320 170 60 50 14 10 35 80 160 50 115BM 29.052 315 20 40 0,25 650 750 930 320 170 60 50 14 10 35 80 160 50 140BM 29.053 315 25 40 0,25 800 900 1080 320 170 60 50 14 12 40 110 160 50 160BM 29.054 315 30 40 0,37 1000 1100 1280 320 170 60 50 14 12 40 110 160 50 190BM 29.055 400 20 35 0,25 400 500 700 405 210 70 60 18 14 45 110 165 70 160BM 29.056 400 25 35 0,25 500 600 800 405 210 70 60 18 14 45 110 165 70 180BM 29.057 400 30 35 0,25 650 750 950 405 210 70 60 18 14 45 110 165 70 210BM 29.058 400 40 35 0,37 800 900 1100 405 230 80 60 18 16 55 110 165 70 240BM 29.059 400 50 35 0,37 1000 1100 1300 405 230 80 60 18 16 55 110 165 70 280The above mentioned capacities are guidelines. For specific applications please contact Bakker Magnetics b.v.[ ][ D R U M M A G N E T S Y S T E M S ]ABCA + 80H500580600A + 40580500227,5267,5102,5142,5133,8AFEM10290AA + 80M10GFGF + 40100250500D R U M M A G N E T S I N H O U S I N GArt. N° width A B C E F G H weight.(kg)BM 29.149 250 340 700 250 100 250 2X125 2X190 130BM 29.150 500 615 980 500 350 500 3X166 5X131 200BM 29.151 600 715 1080 600 450 600 3X200 5X151 225BM 29.152 750 865 1230 750 600 750 5X150 5X181 260BM 29.153 900 1015 1375 900 750 900 6X150 5X211 300B A K K E R M A G N E T I C S27D R U M M A G N E T S Y S T E M S[ ]28 H E A D R O L L E R M A G N E T S Y S T E M SB A K K E R M A G N E T I C S[ ]29 B A K K E R M A G N E T I C SH E A D R O L L E R M A G N E T S Y S T E M S[ H E A D R O L L E R M A G N E T S Y S T E M S ]The magnetic headroller attracts iron particles from the flowof materials, after which they are transported to the lowerpart of the conveyer belt where they can be collected.In the standard configuration the headrollers have alongitudinal pole field pattern. This is suitable for thick-layered materials and larger iron particles in the flow of rawmaterials. On request headrollers can be supplied with atransversal pole field pattern, for use in slight iron pollutionand thin material layers. A combination with a headrollermagnet and an overbelt magnet system results in a perfectseparation.FOR CONVEYOR BELTSThe magnetic headroller replaces the drive roll at the end of the conveyor belt.Considering the diversity of conveyor belts in use, Bakker Magnetics headrollermagnets can be entirely made to measure.H E A D R O L L E R M A G N E T S Y S T E M SBADEFKHGCJØK A R A K T E R I S T I E K E P A R A M E T E R S B I J E D D Y - C U R R E N T N O N - F E R R OH E A D R O L L E R M A G N E T Art. N° Belt ø Capacity Max. belt A C D F I J K Weight(m3/h) speed (m/s) (kg)BM 27.044* 400 215 14 0,8 500 40 32 119 10 27,0 909 75BM 27.045* 500 215 17 0,8 600 40 32 119 10 27,0 1009 90BM 27.046* 600 215 21 0,8 700 40 32 119 10 27,0 1109 100BM 27.047* 650 215 23 0,8 750 40 32 119 10 27,0 1159 110BM 27.048* 800 215 28 0,8 950 40 32 119 10 27,0 1359 130BM 27.049* 1000 215 35 0,8 1150 40 32 119 10 27,0 1559 160BM 27.050* 400 315 20 1,2 500 40 32 119 10 27,0 909 130BM 27.051* 500 315 27 1,2 600 40 32 119 10 27,0 1009 140BM 27.052* 600 315 30 1,2 700 50 48 153 14 42,5 1173 190BM 27.053* 650 315 35 1,2 750 50 48 153 14 42,5 1223 l95BM 27.054* 800 315 45 1,2 950 50 48 153 14 42,5 1423 230BM 27.055* 1000 315 55 1,2 1150 65 55 207 16 49,0 1717 280BM 27.056 400 400 35 1,5 500 50 48 153 14 42,5 973 200BM 27.057 500 400 45 1,5 600 50 48 153 14 42,5 1073 220BM 27.058 600 400 55 1,5 700 50 48 153 14 42,5 1173 270BM 27.059 650 400 55 1,5 750 50 48 153 14 42,5 1223 280BM 27.060 800 400 70 1,5 950 65 55 207 16 49,0 1517 330BM 27.061 1000 400 90 1,5 1150 65 55 207 16 49,0 1717 420* These models can also be supplied with a very powerful neodymium magnet systemThe above mentioned capacities are guidelines. For specific applications please contact Bakker Magnetics b.v.[ ]30 B L O C K M A G N E T S B A K K E R M A G N E T I C S[ ]31 B A K K E R M A G N E T I C SB L O C K M A G N E T S [ B L O C K M A G N E T S ]Block magnets can be appliedto de-iron material flows onconveyor belts, at a free fall,at vertical or inclinedconveyor chutes, above guideplates, etc.B L O C K M A G N E T SABCDEArt. N° bar bar nut ø 5x25 ø 5x75 M1628.190 t/m 28.192 165 225 13028.200 t/m 28.210 255 370 18028.230 t/m 28.240 260 380 19528.310 t/m 28.318 295 430 22528.320 t/m 28.328 315 460 24028.330 t/m 28.340 335 480 25028.353 t/m 28.367 360 500 275C A T C H F I E L D D E P T H SB L O C K M A G N E T S Art. N° A B C D E * Weight(kg)BM 28.330 835 810 350 500 485 M16 990BM 28.332 1040 810 350 625 485 M20 1245BM 28.334 1250 810 350 750 485 M20 1505BM 28.336 1450 810 350 870 485 M24 1735BM 28.338 1650 810 350 990 485 M24 1990BM 28.340 1850 810 350 1110 485 M24 2240BM 28.353 835 900 410 500 540 M20 1335BM 28.355 1040 900 410 625 540 M24 1665BM 28.357 1250 900 410 750 540 M24 1995BM 28.359 1450 900 410 870 540 M24 2325BM 28.361 1650 900 410 990 540 M30 2655BM 28.363 1850 900 410 1110 540 M30 2975BM 28.365 2050 900 410 1230 540 M30 3305BM 28.367 2250 900 410 1350 540 M30 3630* = 4 x eye bolt C15 Din 580B L O C K M A G N E T S Art. N° A B C D E * Weight(kg)BM 28.190 520 310 130 310 185 M16 95BM 28.191 720 310 130 410 185 M16 135BM 28.192 920 310 130 550 185 M16 175BM 28.200 430 505 180 260 305 M16 160BM 28.201 530 505 180 320 305 M16 200BM 28.202 635 505 180 380 305 M16 240BM 28.203 735 505 180 440 305 M16 275BM 28.204 835 505 180 500 305 M16 315BM 28.205 935 505 180 560 305 M16 355BM 28.206 1040 505 180 625 305 M16 395BM 28.207 1140 505 180 685 305 M16 430BM 28.208 1250 505 180 750 305 M16 470BM 28.209 1350 505 180 810 305 M16 510BM 28.210 1450 505 180 870 305 M16 550BM 28.230 430 810 180 260 485 M16 265BM 28.231 530 810 180 320 485 M16 330BM 28.232 635 810 180 380 485 M16 400BM 28.233 735 810 180 440 485 M16 460BM 28.234 835 810 180 500 485 M16 525BM 28.235 935 810 180 560 485 M16 590BM 28.236 1040 810 180 625 485 M16 655BM 28.237 1140 810 180 685 485 M16 720BM 28.238 1250 810 180 750 485 M16 770BM 28.239 1350 810 180 810 485 M16 850BM 28.240 1450 810 180 870 485 M16 915BM 28.310 835 610 247 500 365 M16 580BM 28.312 1040 610 247 625 365 M16 740BM 28.314 1250 610 247 750 365 M16 900BM 28.316 1450 610 247 870 365 M20 1025BM 28.318 1650 610 247 990 365 M20 1180BM 28.320 835 810 247 500 485 M16 755BM 28.322 1040 810 247 625 485 M16 990BM 28.324 1250 810 247 750 485 M20 1145BM 28.326 1450 810 247 870 485 M20 1375BM 28.328 1650 810 247 990 485 M20 1575B L O C K M A G N E T S Bakker Magnet ics b .v.Sc iencepark E indhoven 55025692 EL Son - The Nether landsPhone +31 40 2 678 678Fax. +31 40 2 678 899E-mai l : Info@bakkermagnet ics .comInternet : www.bakkermagnet ics .comBM 601.200/E 2003-06Apart from the extensive standard package of magnetic products and systems, Bakker Magnetics also supplies custom-made products as requested. Bakker Magnetics reserves the right for deviations indimensions, weights and other properties of the products mentioned in this catalogue. No rights can be derived from the information included in this brochure.