... oxide, carbon powder, charcoal powder, slag, gypsum, tailings, sewage sludge, kaolin, activated carbon, coke powder and other powder, powder, waste, waste ... iron oxide skin and dust ash, slime, powder metallurgy, sea Kam iron carbon products, such ... particles should be less than 1mm at 30-40%; 1mm to 2 mm; particles should ... be in the 30-40%; the maximum particle size should be less ...