Qualified limestone in the bunker, the hoist ascends and transports it into the preheater at the top of the bin. At the top of the bin of the preheater, controlled by the upper and lower two material level, and then through the tremie pipe it will be evenly distributed to the preheater. Limestone in the preheater kiln flue gas heating is 1150 ° C to 900 ° C; about 30% of decomposition, the hydraulic push rod is pushed into the rotary kiln, the limestone in the rotary kiln is sintering into CaO and CO2. Generated limestone after decomposition is into the cooler, is blowing in the cooler air cooled to 100 ° C to be discharged. By the heat of 600 ° C hot air into the kiln and the gas mixture combustion. Waste gas in the cold wind through the induced draft fan is into the bag filter, then through exhaust fan into the chimney. Out of the cooler, lime is by vibrating feeder, bucket conveyor, bucket elevator, belt conveyor into lime finished-parts storage.

Henan Zhengzhou Mining Machinery Co., Ltd  produces active lime kiln with vertical preheater, which is in the introduction of foreign advanced technology on the basis of the development of active lime calcining equipment with independent intellectual property rights by my company. It is widely used in the limestone, active lime production line.