What are the types and characteristics of lime kilns
Lime kiln is an important equipment used for calcining limestone to produce lime, with various types and characteristics.
Vertical kiln: The structure is a vertical cylindrical shape, suitable for small and medium-sized production, with low investment costs. Common types include mixed material vertical kilns and gas vertical kilns, with fuels mostly consisting of coke or anthracite. Its thermal efficiency is low and its environmental performance is relatively poor, but it is easy to operate and maintain.
Rotary kiln: a horizontal or slightly inclined steel cylinder that moves materials through rotation. Suitable for large-scale continuous production, high degree of automation, diverse fuels including natural gas, coal powder, etc. High thermal efficiency, stable product quality, and good environmental performance, but with a large footprint and high investment costs.
Double chamber kiln: adopting the principle of parallel flow heat storage roasting, the two kiln chambers alternate combustion, using exhaust gas to preheat raw materials, significantly saving energy. The thermal efficiency can reach 80-90%, suitable for large-scale production, but the investment cost is high and the technology is complex.
Sleeve kiln: The kiln body consists of a kiln shell lined with refractory materials and an inner sleeve divided into upper and lower sections, combining the advantages of counter current and co current calcination. Simple operation, stable product quality, but complex structure, difficult maintenance, and high infrastructure investment.
