... Ball Machine, can be a variety of powder material ( such as magnesia, bauxite, dolomite, iron and so on ) through forcing ... users to choose.Scope:1.Such as, coal powder, charcoal powder, metallic powder (Fe / Si powder), iron scale, iron sludge, precipitator dust, iron ... First, the powder material will be transfered on to the two pressure roller through the feeder. 2. The natural materials enter ...