... 30% 2.stable operation and good performance 3.widely used in metallurgy, building, refractory,ect What is Rotary Kiln? Rotary ... Kiln: 1) Rotary kiln is the Thermal Equipment, heating materials, in cement industry for calcining clinker. 2) It is also used ... in various industries, such as cement, nonferrous metallurgy, ferrous metallurgy, chemistry, ...