... balls or briquettes. Such raw material as CaO powder, MgO2 powder, cooper powder, Chromium powder, waste material of lead and zinc, Aluminum vanadium and soil ... ,charcoal powder-Coal block,coal powder -Coke-Anthracite-Ash-Iron Oxide-Iron concentrate-Metal powder-Iron powder-Dried Sewage Sludge-Steelwork dustPictures of Coal Powder Pressing ...