... is the only have patent for making Power Ball Press Machine. No matter where you find it, pls ... Color and black metallic mine powder2. Coal powder, Coke powder, Lignite, etc,3. Charcoal powder, fireproof materials, Desulfurization gypsum, Dolomite, ... that the granule size fed to the machine is maintained below 3mm, preferable in the ... range of 8-20%. Mineral Powder Ball Press Machine(zhongzhou brand)