How much coal is needed to produce one ton of lime in a lime shaft kiln
The lime shaft kiln is a commonly used calcination equipment. The amount of coal required to burn one ton of lime is affected by various factors, among which the calorific value of coal is one of the key factors.
When using anthracite with a calorific value of approximately 7000 kcal, about 120 kilograms of lime are required to burn one ton of lime in a lime shaft kiln. This data is derived from current advanced lime shaft kiln technology and practical production experience. Advanced lime shaft kilns have been optimized in design and operation, such as adopting reasonable kiln structure, efficient combustion systems, and good insulation measures, which all contribute to improving coal combustion efficiency, reducing heat loss, and thus lowering coal consumption per unit of lime.
However, coal consumption in actual production is not fixed. If the calorific value of coal fluctuates, the consumption will change accordingly. When the calorific value is below 7000 kcal, to achieve the required heat for calcination, the amount of coal used needs to be increased. In addition, the composition and particle size of limestone, as well as the operation level of the shaft kiln, also affect coal consumption. Therefore, in actual production, various factors need to be comprehensively considered to reasonably control the amount of coal used, in order to achieve efficient, energy-saving, and environmentally friendly lime production.
