... and black metallic mine powder 3.Coal powder,Coke powder,Lignite,etc This briquette machine have two larger rollers ... 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%. coal powder briquette machine