Rotary kiln

preheating

The novel lime rotary kiln adopts the process of vertical pre-heater + rotary kiln + vertical cooler. Moreover the advanced two supports technology have been introduced which can increase greatly the kiln service life compared with the normal rotary kiln with three supports, so it’s easy for adjust and more efficient on energy saving. The hydraulic thrust device used to support the sliding force of whole kiln can push automatically the kiln body to move upward, and control the sliding speed. The DCS intelligent centralized control system -most advanced in the world is adopted to realize the unmanned operation in the production area. The kiln is able to operate with full coal gas burning, full pulverized coal burning and coal gas & pulverized coal blending burning in order to produce the lime of good quality. Advanced structure, pre-heater and cooling system with low pressure loss 1. Most advanced vertical pre-heater is used to increase the pre-heating effect. The decomposition rate of the pre-heated limestone ready to enter in the kiln can reach 30%. 2.Multi channel vertical cooler is used on the kiln head to quench the finished lime in order to realize the process of “quick burning & quenching” for the lime burning. More perfect kiln production process 1. Q235-B high carbon steel made by Anyang Steel Plant is used for the kiln shell to ensure the　good quality. 2. Interfaces of each section of the kiln adopt the double groove SAW welding to ensure the whole strength of the shell. 3.Annealing treatment of each section must be made after welding in order to remove the inner stress of the shell and guarantee the kiln service life.