Production Process of Rotary Kiln

Common equipment of rotary kilns include cement rotary kiln, metallurgical chemical rotary kiln and lime rotary kiln. The kiln is used for roasting active lime and light-burning dolomite used in iron and steel plants and ferroalloy plants. Although the processing materials are different, the process flow is basically the same. Let's take a look at the process flow of the rotary kiln.

1. Qualified materials are stored in the silo, lifted by the elevator and transported into the silo at the top of the preheater. In the silo at the top of the preheater, the feeding amount is controlled by the upper and lower level gauges, and then the limestone is evenly distributed into each chamber of the preheater through the feeding pipe.

2. The material is heated by 1150°C kiln flue gas to about 900°C in the preheater, about 30% decomposed, pushed into the rotary kiln by hydraulic push rod, and sintered and decomposed in the rotary kiln.

3. The material generated after decomposition enters the cooler, and is cooled by the blown cold air in the cooler to 100°C and discharged, and the 600°C hot air after heat exchange enters the kiln and mixes with gas for combustion.

4. The exhaust gas is mixed with cold air and enters the bag filter through the induced draft fan, and then enters the chimney through the exhaust fan. The materials coming out of the cooler are sent to the finished product warehouse through vibrating feeder, chain bucket conveyor, bucket elevator and belt conveyor, and screening and other processes are carried out according to customer requirements.