Electromagnetic drum MB E
Electromagnetic drum is a device for automatic and permanent removal of magnetic iron metals from inert materials. In case of highly abrasive materials or if there are present sharp objects in the material, the magnetic drum can be a suitable substitution for e. g. an overband magnet. The electro drums have no dead spots and their magnetic attractive force is stronger than a permanent design. That is why the electromagnetic drums are preferable for the separation of larger sized and heavier ferrous metals and are used above all for cleaning shredded scrap and cars, incineration bottom ash, foundry residues etc. Besides, when there is a high material layer, high magnetic forces are needed to extract the ferrous metal from the non-metallic material - and the electro drums are able to cope with this task. And for applications where the magnetic drum requires switching off, the only option is the electro magnet, where the magnetic field is easily switched on and off.
Benefits for the use of separator
- Final material without iron contamination
- Protection of production equipment
- Smooth production operation
- Automatic cleaning without interruption of the material flow
- Elimination of operator errors
Separator design
The electro drum magnet has stationary electromagnetic coils positioned inside a non-magnetic, commonly manganese steel shell, fitted with welded stainless-steel wiper bars. The shell rotates around the stationary electromagnetic coil at a speed determined by the volume of processed material.
Transformer rectifier
Transformer rectifier provides power to the magnet at the correct Amps, depending on magnet design, ambient temperature and input voltage.
Transformer rectifier design
- Fully welded steel enclosure to IP 65
- Oil level gauge fitted to front of tank
- Transformer: double wound transformer to BS EN 60076
- Rectifier according to BS 4417 ABCD
- Protection: diode protection with fast acting semi-conductor fuses
Application modes
Material can be fed onto the drum at one of three different points depending on process configuration:
- The material is fed onto the top of the electro drum. Magnetic material is attracted and held to the drum shell before being discharged beneath the drum. This kind of feeding is ideal for the application of MB E RADIAL.
- The material is fed onto to the centre of the electro drum. Attracted magnetic material is discharged opposite to the in feed. MB E AXIAL as well as MB E RADIAL can be applied.
- The material is fed beneath the electro drum. Magnetic material is captured and held to the drum shell and then carried up and discharged over the top of the drum. This kind of feeding is ideal for the application of MB E AXIAL.
In all three configurations, non-magnetic materials will free-fall forward following their normal trajectory.
MB E AXIAL
- Several magnetic poles aligned parallely to the axis
- Continuous high field strength at the separation zone
- Even cover wear
- High-intensity primary coil for the concentration of the maximum flux at the point of extraction
- Lower intensity secondary coil for the transport of the ferrous material to the point of discharge
- Ducted coils extend the coil life
- Heavy duty design
- Platewheel is bolted to a robust drive ring
- Extensive optional equipment (spillage rings, base frame, geared motor, chain drive, split platewheel)
MB E AXIAL is set with several magnetic poles aligned parallely to the axis of the drum. The first pole is extremely strong and attracts the incoming material, the other poles are used to retain the ferrous particles on the drum surface before the ferrous metals is discharged. MB E AXIAL drums are designed to allow extracted magnetic materials to flip (because of different polarity) over the face of the drum to release any non-metallic materials that may be caught between the ferrous material and the magnet. This kind of electromagnetic drum is used in applications such as municipal refuse and automobile fragmentiser plants (in order to achieve the best possible ferrous purity). Non-magnetic materials are unaffected and flow under a normal trajectory.
MB E RADIAL
- Several poles are arranged radially over the width of the drum
- Electromagnetic coils concentrate maximum flux at the point of extraction
- Extension pole arranges for the discharge
- High processing capacity
- Platewheel is bolted to a robust drive ring
- Extensive optional equipment (spillage rings, base frame, geared motor, chain drive, split platewheel)
MB E RADIAL is set with radial pole (all coils have the same polarity and are placed next to each other, giving a continuous radial polarity over the entire width of the drum). The strong magnetic field attracts the magnetically susceptible materials to the rotating shell surface of the drum. The revolving shell transports the magnetic particles by means of an extension pole out of the magnetic field where they are discharged into a collection area or onto a receiving conveyor. Non-magnetic materials are unaffected and flow under a normal trajectory.
The MB E AXIAL uses magnetic poles positioned parallel to the drum axis with alternating polarity, achieving a high purity of the separated material — it is therefore the preferred choice where the cleanest possible output fraction is the priority (municipal solid waste sorting, end-of-life vehicle shredding). The MB E RADIAL operates with radial poling across the full drum width, offers higher throughput capacity, and is optimal for material fed onto the top of the drum.
The electromagnetic drum MB E supports three material feed configurations: onto the top of the drum (ideal for MB E RADIAL), at the mid-section (suitable for both types), or at the bottom of the drum (MB E AXIAL only). The magnetic field has no effect on inert (non-magnetic) material, which falls from the drum surface by natural gravity regardless of the feed arrangement.
The outer drum casing is made of 8 mm manganese steel, which withstands abrasive stress even in contact with sharp scrap or slag fragments. The anti-abrasive covers are bolted in place, allowing fast replacement without the need to disassemble the entire separator.
The electromagnetic drum MB E is standardly rated for 415 V supply and is fully compatible with 400 V and 380 V as well. Included in the delivery is a control cabinet with transformer and rectifier (IP 65 protection), equipped with surge protection featuring fast-acting semiconductor fuses.
We manufacture electromagnetic drums MB E to order; an extensive range of options is available, including a raised drum rim, outer frame, gearmotor, chain drive, or split sprocket. Delivery includes installation, commissioning, and operator training; we also provide warranty and post-warranty service as well as free material testing on our equipment.
Electromagnetic drums MB E are a proven solution in demanding environments such as end-of-life vehicle shredding and processing, municipal solid waste incineration plants, municipal solid waste sorting, the foundry industry processing steel from slag, mining, and quarrying. They are manufactured in partnership with a reputable European manufacturer with extensive experience in these sectors.
Which industrial branches can the electro magnetic drum be use of in?
Electromagnetic drums offered by SOLLAU are made in co-operation with a renowned European producer in order to be used in difficult and arduous environments including automobile and vehicle fragmentation plants, household waste incineration plants, household refuse recycling operations, steelworks recovering steel from slag etc.
Recycling and waste processing
Machining and foundry industry
Paper industry
Tobacco industry
Ceramic and glass industry
Mining and quarrying industry
Cement and lime industry
Chemical industry, paints and lacquers
Automotive industry
Plastics and rubber industries
Thermal power plants
Wood industry