Rotary kiln has a very high industrial utilization value. It plays an extremely important role in the fields of metallurgy, building materials and chemical industry. In the calcining process of rotary kiln, it adopts advanced kiln head and advanced kiln sealing device. Technology makes the production of rotary kiln more reliable. Rotary kiln can be divided into dry rotary kiln and wet rotary kiln. Due to different rotary kiln, the calcining process is not the same. The dry rotary kiln is made of dry powder as raw material, so its fluidity is poor and its composition is not uniform. This paper mainly understand the process flow of wet rotary kiln.
The calcination process of the wet rotary kiln is:
After the raw materials enter the raw material silo, the agitated and homogenized raw material is fed into the preheater, the raw material in the rotary kiln is heat exchanged with the hot gas flow, and after entering the cyclone cylinder, the sample is decomposed and calcined in the analysis furnace, and after The cyclone-barrel coal is separated from the feed gas, the material enters the rotary kiln, and then calcined. The dust collected in the rotary kiln head passes through the clinker of the cooler, and is sent to the three clinker stores via the liner conveyor. The coolant temperature is high. The part of the hot air passing through the part of the kiln hood is used as the secondary air, and the part that enters the decomposing furnace serves as the tertiary air. The middle section of the cooling machine hot air enters the coal mill to dry the raw coal, and the rest is discharged after the dust is collected by the electric dust collector. In the atmosphere, for the exhaust gas, it will be used as a drying heat source for the raw material system after being heated and cooled by a high-temperature fan, or it will be dust-removed at the end of the kiln.
In the process of calcining the rotary kiln, everyone needs to pay attention to the structure of the rotary kiln wheel belt. When designing the wheel belt, the principle of “uniform cooling rate of the various parts of the casting” should be followed to reduce the adaptability of the casting and be used on both sides of the belt. The baffle or retainer ring is used to limit the axial movement of the wheel belt along the cylinder body of the rotary kiln shell. In the process of calcining rotary kiln, in order to improve the quality and yield of calcined material, the length and temperature of the calcining zone should be increased as much as possible. The higher the temperature, the longer the calcination zone and the better the quality of calcination.
