What are the reasons for the downward movement of the calcination belt in the lime kiln
The most common problem of downward movement of the calcination belt in the operation of lime shaft kiln is that many masters cannot pinpoint the root cause. In fact, the core reason lies in the details of daily operations.
The first point is that the fuel particles entering the kiln are too large, and large pieces of coal cannot be completely burned through in the predetermined calcination area, causing them to ignite and run down.
The second point is that the ash discharge speed is too fast and the amount of ash is added too vigorously. The material in the kiln moves downwards much faster than the calcination rhythm, and the calcination belt can only move downwards along with the material.
The third point is more crucial, as the wind pressure is too low and the air supply resistance is high. The actual air flow into the kiln is simply not enough. Even if the air door does not move on the surface, the downward moving calcination belt will still lack oxygen and fall into a vicious cycle of increasingly incomplete combustion as it moves downwards.
By closely monitoring these typical characteristics, one can quickly determine: the ash temperature is significantly high, the discharged lime is mixed with bright red fire, and there are still unburned coal blocks visible. At the same time, the situation of raw and over burned lime appears together, indicating that the calcination zone has significantly moved down and needs to be adjusted quickly to bring it back to its normal position.
