A granular silicon dust and magnetic removal system for polysilicon production

Abstract

The utility model discloses a granular silicon dust and magnetic system for polysilicon production, including feed pipe, blanking pipeline, discharge pipe, negative pressure air outlet pipe, nitrogen gas inlet pipe, magnetic core, the top of blanking pipeline is passed the bottom end of feed pipe, the top of discharge pipe is connected with the bottom end of blanking pipeline, nitrogen gas inlet pipe and the lateral wall intercommunication of discharge pipe, one end of negative pressure air outlet pipe and the lateral wall intercommunication of blanking pipeline, there is the access hole on the lateral wall of blanking pipeline, and there is the door plate on the access hole, and there is the support on the door plate, and the magnetic core is placed in the inside of blanking pipeline, and the bottom is fixed with the support, the inner wall of feed pipe, blanking pipeline, discharge pipe, negative pressure air outlet pipe, nitrogen gas inlet pipe, door plate and the outer surface of magnetic core, support are all coated with polyurethane interlayer, and the advantage has: the fine dust in granular silicon is taken away and removed by the nitrogen gas that is blown from down to up, and simultaneously, the micro metal foreign matter in granular silicon is magnetically absorbed on the surface of magnetic core, and iron metal foreign matter is reduced.

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