... structure & strong construction 3.Easy operatioion IntroductionThe rotary kiln is widely used in the fields of building materials, metallurgy ... zinc, stannum, nickel, wolfram, chromium, etc., the rotary kiln can be used to sinter and roast ore, concentrate, intermedium, etc ... , stannum, nickel, wolfram, chromium, etc., the rotary kiln can be used to sinter and roast ore, concentrate, intermedium, etc ...