SEPARATION been simplified to make the belt replacement procedure even faster than the previous models , but the Kevlar belts are still the longest lasting belts for that unit . Belts with diagonal splices as well as finger splices are also available .”
STEINERT launches magnetic equipment e-book
Part of the challenge for suppliers is equipping customers with the knowledge they need backed up by adequate testing options . Germanyheadquartered magnetic separation major STEINERT has recently launched a new e-book which explains how to select the right magnetic equipment for the right application . This includes tramp removal which as outlined prevents equipment used to recover bulk materials suffering serious damage from tramp iron , such as wires , nuts , bolts or excavator teeth . “ All equipment used in the recovery of minerals needs to be protected from collisions with tramp iron in order to reduce wear and downtimes and , of course , to avoid huge repair costs ,” says Kai Bartram , Head of Mining Europe , Africa , Asia at STEINERT . The company offers various oil and aircooled magnets and metal detectors for this purpose with several thousand of its magnets in use .
For conveying systems , STEINERT ’ s advice for most applications is to position the magnet above the head pulley . But in some existing plant layouts such a setup is not feasible and one has to choose an installation over the belt . In that case the suspension magnet needs to lift the weight of the tramp material and additionally overcome the weight of the material above it . To realise the same separation efficiency , the size of the magnet has to be bigger or a magnet has to be installed after each conveyor transfer . So in regard to separation efficiency , an installation over the head pulley is optimal .
For mined ore streams with high tramp content , self cleaning systems include air-cooled options like the STEINERT UME with an extremely strong and far-reaching magnetic field designed for high bed depths and small tramp metal . The STEINERT UMP permanent magnets are very energy efficient since they do not require a rectifier . They are designed for lower bed depths and mainly big ferrous magnetic tramp . High intensity oil-cooled overband magnets like the STEINERT OHSM have been developed for highcapacity conveyors where the standard UME / UMP have difficulty in removing tramp metal . These magnets are proven to work efficiently even in extreme conditions .
The STEINERT BRP / BRE magnetic head pulley can be implemented in existing plants and replaces regular head pulleys . STEINERT will manufacture the magnetic head pulley according to design requirements . It can be used to
separate tramp metal in all sizes as well as a method for dry magnetic ore beneficiation ( cobbing ). It is ideal for reclaiming small , weak magnetic particles from conveyed material .
For streams with low tramp content , STEINERT AME / AMP magnets provide a cost saving solution for separating tramp metal that occurs only occasionally . They are not self-cleaning , therefore they require a removal cycle during which the magnet has to be swung away from the belt briefly . Attracted ferrous parts fall off once the electromagnet ( AME ) is switched off . The weaker AMP has to be cleaned manually . The STEINERT Boomerang giant magnet works for high-capacity discharge installations . The shape of the magnet reflects the material trajectory . It is
used for wide conveyor belts with high conveyor speed and layer thicknesses at extreme throughput .
The STEINERT MP magnet can be connected directly to the main power supply , which allows extremely fast commissioning and also saves space because no control cabinet and extra rectifier of any kind is needed . It works for high bed depths with tramp metal magnetics and is easy to relocate .
Finally , the STEINERT OHSM magnet is constructed for high bed depths and small tramp metals which cannot be removed by STEINERT AME / AMP . Made for extreme ambient conditions , the oil-cooled system is ideal for batch removal in the case of low tramp iron volumes .
APRIL 2021 | International Mining 47