The rotary kiln has been the cement high temperature calcination equipment since 1885, its specification has experienced from fine to coarse, longer, and then from the long to short development process.

Rotary kiln of cement clinker is accompanied with the appearance of dry process, but at that time many problems can not be solved because that the calcining technology of cement production is not mature, among which the biggest problem is that the uniformity of the raw material is poor. Because of this problem, the quality of cement clinker produced by the dry process is very poor and the stability is not good. Wet process is adopt during cement production, and then drying, preheating, calcining, which improves the quality of cement clinker.

Subsequently, cement production equipment manufacturers launch the wet process of cement clinker, and it gradually develop to the direction of large-scale. But the diameter and length of the kiln are too large, and the supporting device of the rotary kiln is too much, which brings the adverse effect on design of supporting device, stress distribution after deformation and stability of refractory material in kiln. So that the operating rate of large-scale cement kiln was obviously reduced.

With the development of technology of preheater and the improvement and application raw material dry pre-homogenization technology around 1950, rotary kiln which is characterized by dry process has returned to its original development orbit.

Preheater completed a lot of heat exchange and part of the material decomposition, which greatly shorten the length of the rotary kiln, and the heat consumption is lower than the wet kiln. This new type kiln greatly improved the rotary kiln thermal load and operating conditions and provided reliable technical support for the cement industry to achieve large-scale. The emergence and application of new and high efficient cooler, reasonable design and flexible control of multi-channel burner launch make the function of cement rotary kiln be changed, which has realized the leap of the cement technology.

ZK researchs and develops a variety of cement calcination equipment, such as cement rotary kiln, cement dryer, cooler and so on. We can also provide comprehensive technical service, please contact us to find out more.