A rotary kiln can be divided into different materials for the construction industry; cement kiln, metallurgy kiln and limestone kiln.
The cement kiln is mainly used for calcining of cement clinker. There are dry and wet types.
The metallurgy kiln is used in the metallurgy industry and ironworks for lean iron ore, chromium ore and ferronickel ore calcining. The rotary kiln is used for calcining of calcium and aluminum hydroxide in aluminum manufacturer; for extracting of chrome sand ore and chrome powder ore in a chemical plant.
The lime kiln (active lime kiln) is used for roasting the burnt lime which is used in steel works and ferroalloy works and calcining dolomite.