Rotary kiln refers to the rotary calcining kiln (commonly known as rotary kiln), which belongs to the class of building materials and equipment. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to different processing materials.

Cement rotary kiln is mainly used for calcining cement clinker, divided into dry production of cement kiln and wet production of cement kiln two categories. Metallurgical and chemical kilns are mainly used for magnetization roasting of lean iron ore in iron and steel plants in metallurgical industry. Oxidation roasting of chromium and nickelite; Refractory plant calcined high alumina vanadite ore and aluminum plant calcined clinker and alumina hydroxide; Chemical plant roasting chromium ore and chromium ore powder and other minerals. Lime kilns (i.e. active lime kilns) are used for roasting active lime and light burnt dolomite for iron and steel works and ferroalloy works.