Cement kiln is used for making of cement clinker and there are dry and wet methods to make cement. Metallurgy chemical kiln is used for magnetic roasting of iron ore and oxidizing roasting of chrome and nickel in the steel factory, baking high-alumina mine in the refractory material factory, baking chamotte and alumina in the aluminium factory and baking chrome ore and chrome powder in the chemical plant. Limekiln (active lime kiln) is used for baking active lime or lightly burning dolomite in steel factory or ferroalloy factory.
