When rotary kiln fuel and the burner go wrong, there will be a problem that the rotary kiln ring formation, if it is serious that rotary kiln ring formation, it must be take quick action that stopping rotary kiln.

The main reasons of rotary kiln ring formation is the following.

First, the ingredients of pouring raw material into the rotary kiln fluctuate wildly, and feeding volume is unstable, will inevitably lead to rotary kiln thermal system disorders. When the composition is high and the feed volume is large, the first coal must be added to increase the firing temperature, and even reduce the speed of the rotary kiln. When the composition is low or less feeding, the operation can not be adjusted, firing zone with high temperature, so materials are too high and sticky, and easy to form long thick kiln skin, and thus the formation of clinker ring.

Second, the impact of harmful ingredients in the rotary kiln, such as magnesium oxide content is high, especially greater than 5 percentage points, which can make clinker liquid quantity increased, liquid viscosity decreased, clinker sintering narrowing, rotary kiln skin thickening to form clinker ring.

Third, the impact of rotary kiln coal quality. High ash, coarse fineness, high water of coal is easy to produce incomplete combustion, and coal ash deposition is relatively concentrated, easy to form clinker ring.

In addition, the amount of feed coal is not stable, so that the temperature fluctuated in the rotary kiln, but also easy to form a phenomenon of ring formation.

The following is the main treatment of rotary kiln ring formation.

First, strengthen the management of raw coal into the plant and the preparation process of pulverized coal, and the fineness of coal powder must be controlled below 78 microns, the remaining 32%, and moisture control below 1.62%. In the course of operation, appropriate increase rotary kiln grate cooler material layer, generally controlled at about 600 mm, so that the secondary air temperature increasing from 800 degrees centigrade to about 900 degrees centigrade to enhance the rotary kiln coal combustion, and open large internal air. The ratio of internal and external air is adjusted to 7: 3, to improve the temperature of the kiln head, to ensure complete combustion of pulverized coal.

Second, when stopping rotary kiln and striking the rotary kiln ring formation, the fitters replace new bearings of high-temperature draught fan, while repairing sealing ring. After opening the rotary kiln, the high-temperature draught fan is operating properly, so completely solve the problem of the rotary kiln ventilation.