Causes for Rotary Kiln Skin Peeling off

1. The ingredients are unstable and the raw material composition is unstable. When the feed material is good to burn, the temperature in the rotary kiln is high, and when it is not good, the temperature is low. In this way, the temperature rises and falls, causing uneven expansion and contraction of the kiln skin, which is easy to fall off.

2. The air-coal material does not match. The main manifestation is that the feed volume is unstable. When the material volume is large, the temperature is low, and when the material volume is small, there is no material to absorb the excess heat. It will also cause temperature instability, resulting in uneven thermal expansion and contraction of the kiln skin, which is easy to fall off.

3. Wrong operating procedures, such as improper flame adjustment will also cause the kiln skin to fall off.

To sum up, the cause of the peeling of the kiln skin is that the temperature fluctuates from high to low unevenly, or the temperature is high and the temperature is low. In general, the cause of the peeling of the kiln skin can be attributed to uneven heating.

The following methods can be adopted:

In daily operation, it is necessary to protect the kiln skin from many aspects and prolong the life of the kiln skin. The following methods can be adopted:

1. Formulate reasonable operating parameters, stabilize the thermal system of the kiln, and ensure that the fast-turning rate is above 85%.

2. Strengthen calcination control to avoid burning big fire and top fire. It is strictly forbidden to flow or raw material to ensure that the clinker is small and uniform.

3. With the continuous increase in output, improve the structure of the coal injection nozzle, maintain a complete flame shape, do not rinse the kiln skin, often move the position of the coal nozzle, and adjust the high temperature area to facilitate the adhesion of the kiln skin.

4. Deal with the front loops in time, maintain a certain height, and roll out the large pieces in time to avoid damage or damage to the kiln skin, and strive to avoid or reduce large pieces.

5. When it is found that the kiln skin is loose or falling off, measures should be taken in time to make up the hanging, so as to watch and adjust the fire frequently, control the fire power to the middle, and the strong kiln skin cannot be hung when the fire is high, and the fire will continue to deteriorate. , Must be prevented.

6. Configure raw materials with appropriate ingredients to ensure good burning and no agglomeration, which is conducive to the control of the kiln skin and operation.

7. Strengthen equipment maintenance and minimize the number of kiln shutdowns to prevent the kiln skin from falling off due to changes in heat and cold.

8. Strictly prevent the short flame after the loop is formed, which will harm the kiln skin.