
roller mill). Particle Size 1-50 µm ... · A hammer mill is essentially a steel drum containing a vertical or horizontal rotating shaft or drum on which hammers are mounted.There was also a hammer mill and an attrition mill. This area produced a wide variety of flour grades. Each mill had its own cyclone up on the roof. The products would come down into a sifter (each line had one) that would size the particles and divert them either back into the process or into the finished product hoppers in the basement ...The attrition mill is a device for mechanically reducing solid particle size by intense agitation of a slurry of material being milled and coarse milling media. For example