... 4.Low Cost and Labor Large capacity!! sawdust charcoal ball press machineIntroduction:Ball Press Machine also called High Pressure Ball Machine, ... for users to choose.Scope:1.Such as, coal powder, charcoal powder, metallic powder (Fe / Si powder), iron scale, ... coal, iron, coal, aluminum, iron, iron oxide, carbon powder, charcoal powder, slag, gypsum, tailings, sewage sludge, kaolin, activated carbon, ...