Guidelines for Adjusting the Temperature at the Tail of Lime Kilns
The temperature at the tail of the lime kiln is a key indicator that affects the quality and production efficiency of lime. Excessive or insufficient kiln tail temperature can cause a series of problems that need to be adjusted in a timely manner.
When the temperature at the kiln tail is too high, it may cause material overburning, reduce lime activity, damage refractory materials inside the kiln, and shorten equipment service life. At this point, the following adjustment measures can be taken: first, reduce the fuel supply and decrease the combustion intensity, which is the most direct and effective method. Secondly, increase the air intake appropriately to allow more cold air to enter the kiln and absorb some heat, thereby reducing the kiln tail temperature. In addition, check the material supply system to ensure stable and sufficient material supply, and avoid excessive concentration of fuel combustion in the kiln caused by insufficient materials, resulting in local high temperatures.
If the temperature at the kiln tail is too low, it will lead to material undercooking, an increase in lime burning rate, and affect product quality. When adjusting, fuel input should be increased to increase combustion heat. At the same time, reduce the air intake to prevent excessive cold air from entering and lowering the temperature inside the kiln. It is also necessary to check the particle size of the material. If the particle size is too large, it will affect the calcination effect. The crushing equipment should be adjusted to make the material particle size meet the requirements, ensure sufficient calcination, and increase the kiln tail temperature to the appropriate range.
