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Working Principle for the High-voltage Electrostatic Separator
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Working Principle for the High-voltage Electrostatic Separator
The Electrical sorting method used the differences of conductive of different mineral, Under the influence of electric field, mineral particles are subject to electrical and mechanical forces(centrifugal force, gravity, drag) role, then they produce different tracks that make them to be separated, so we can achieve the purpose of sorting.
When the temperature heated to 40°C-60°C after entered into the bin. the mineral particles enter into the power corona areas with the rotation roller shafts along the rotating feed roller(Grounding Electrode)surface, Corona current makes all the mineral particles(conductors and non-conductors) obtain negative charge, Because of low contact resistance. with the rotating feed roller, the conductor’s charges transfer by the roller away quickly, Under the action of mechanical forces, conductors escape away from the roller, and enter into the mineral hopper(conductors), At the same time, because of higher contact resistance with the rotating feed roller, the non-conductors’charges couldn’t transfer by the roller away as quickly as conductors’, so they are forced in the roller surface owing to the role of electrostatic force, with the rotating feed roller, the non-conductors enter into the back of the roller, and are unloaded under brush, Then they are collected in the excellent hopper(non-conductors), At last the Semiconductor mineral particles or failed to fully discharge the conductor mineral particles enter into the middle hopper(semiconductor mineral particles).
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