... etc. It can be divided into cement kiln, metallurgy chemical kiln and lime kiln according to the different materials processed. The cement ... such as iron, aluminium, copper, zinc, stannum, nickel, wolfram, chromium, etc., the rotary kiln can be used to sinter and roast ore ... as iron, aluminium, copper, zinc, stannum, nickel, wolfram, chromium, etc., the rotary kiln can be used to sinter and roast ore ...