From this page, you can get the Cement kiln is used for making of cement clinker ａnd there are dry ａnd wet methods to make cement. Metallurgy chemical kiln is used in metallurgy industry ａnd ironworks for lean iron ore, chromium ore ａnd ferronickel ore calcination, which is used for calcining of high aluminum vandal ochre in refractory material industry; for calcining of calotte ａnd aluminum hydroxide in aluminum manufacturer; for calcining of chrome sand ore ａnd chrome powder ore in chemical plant. Lime kiln are used for calcine dolomite ａnd active lime which is used in steel plant ａnd ferroalloy factory.