... metallurgy, such as iron, aluminium, copper, zinc, stannum, nickel, wolfram, chromium, etc., the rotary kiln can be used to ... Easy operation.Working PrincipleThe rotary kiln can be divided into cement kiln, metallurgy chemical kiln and lime kiln according to the different ... metallurgy, such as iron, aluminium, copper, zinc, stannum, nickel, wolfram, chromium, etc., the rotary kiln can be used to ...