... can be used to make briquettes from coal powder, charcoal powder and coke powder with binder. Suitable materials for briquetting:1. ... Color and black metallic mine powder2. Coal powder, Coke powder, Lignite, etc,3. Charcoal powder, fireproof materials, Desulfurization gypsum, Dolomite, etc. ... , specaial care should be taken to ensure that the granule size fed to the machine is maintained below 3mm, ...