... aluminium, copper, zinc, stannum, nickel, wolfram, chromium, etc., the rotary kiln can be used to sinter and roast ore, concentrate ... ;3. Simple structure, reliable performance;4. Easy operation.Working PrincipleThe rotary kiln can be divided into cement kiln, metallurgy chemical ... , copper, zinc, stannum, nickel, wolfram, chromium, etc., the rotary kiln can be used to sinter and roast ore, concentrate ...