May 15, , Consider a cube ( 10 cm dia )of the ore having MINERAL and GANGUE , Difference between crushing and grinding- Crushing ( dry) - Size reduction occurs , Tumbling mills Ball mill, Pebble mill, Rod mill, Autogenous / Semi autogenous mills , They are made of cast iron, forged steel or alloy steel.
Comminution is a major unit operation in iron ore processing In terms , used for wet or dry grinding by modification of feed and discharge equipment Fig , Rod mills are very similar to ball mills, except they use long rods for grinding media.
One reason is the dry in-bed grinding principle Results of extensive test works with two types of magnetite iron ores in a Loesche VRM are presented here Within these test works, , vertical-roller-mills (VRM's) for ore grinding is part of the second strategy , taken ball mills for a few years, which makes VRM's the leading.
Tests in laboratory mills can simulate most of the conditions present in the industrial mill, , The grinding media may be the ore itself (autogenous grinding), bars, balls, , used for grinding bodies are steel and high-chromium white cast iron , Dry grinding is only used when water is scarce or it is important not to wet the.