Mining and Minerals Today Issue 104 January 2025 | Page 13

_______________________________________________________________________________________ Magnetic
Equipment
▲ Electro Overband Magnet installed in a gold mine
Early protection
Tramp ferrous metal removal occurs at the mine or quarry and at the processing plant . The process of mining and quarrying rock and ore introduces metal contamination in many forms , such as metal bars , digger teeth , nuts and bolts , and discarded metal waste . Magnetic separators separate the magnetically susceptible ferrous tramp metal and work alongside metal detectors that locate non-ferrous metal like manganese steel .
Magnetic separation equipment is required early in the process before the rock or ore is crushed and screened , reducing the risk of costly damage from tramp metal . On plants where there are several stages of crushing and screening , magnetic separators are located between the stages to remove metal liberated in the primary crusher .
Design considerations
Magnetic separator design is dictated by the plant configuration and size . Permanent and
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