... black metallic mine powder 3.Coal powder,Coke powder,Lignite,etc This briquette machine have two larger rollers ... , fireproof materials, Desulfurization gypsum, Dolomite, etc. Request for raw materials:1. In order to ensure the good quality ... ensure that the granule size fed to the machine is maintained below 3mm, preferable in the range ... the range of 8-20%. huizhong brand coal briquette press machine