... 4. Good quality,high quality DYAN Mine Powder Briquette Machine with advanced technology Mine Powder Briquette Machine, generally four rollers ... . Suitable materials for briquetting:1. Color and black metallic mine powder2. Coal powder, Coke powder, Lignite, etc,3. ... materials, Desulfurization gypsum, Dolomite, etc.Operating Principle:The type of briquetting press have two larger rollers in a fixed ...