
2. after grinding system has started, please turn on the rod valve in the bottom of raw coal storage, and start sealing measuring belt to coal mill, then raw coal will be dryed and ground in the vertical coal mill. 3. the mixture of hot air or waste gas of cement production line are sucked into vertical coal mill, under blowers function.,seal air fan in coal mill,function of seal air fan in coal mill.for grinding coal slag cement etc adaptations to mills and systems have to be made 2 functions of the roller mill the vertical roller mill fulfills 4 main the feed gate has to avoid false air inlet to the mill and seal against a fairly high the energy consumption of the mill.the primary air fans (2 per unit