Armoured ring for rotating pneumatic dust extractor has reinforcement for grinding chamber door set close against seal and inside ring to reduce transverse and ring-shaped flow

摘要

The reinforcement (6) for the grinding chamber door is fitted so close against a seal (7) and inside ring (14) of the door that a transverse and ring-shaped flow is reduced so as to significantly reduce the amount of carbon dust particles which are also conveyed. The V-shaped grooved flanks of the surface of an armoured ring counteract the flow direction so that wear is reduced. The groove flanks can run parallel to each other. Where V-shape the v is opposite the flow direction.