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