... kind of machine will b e make the more carbon black , and this carbon black is hard to sale , so must be pollution the ... home and abroad, the heart part adopts"double-layer die" as the unique structure; The rollers are made by abrasion-proof ... , reach the international advanced level.FeedstockAgriculture and forest residues such as rice husk,crop stalk, straw, coconut fiber dust, saw dust ...