The lime kiln boasts a simple and straightforward structure, easy-to-control production process, and high operating rate. Equipped with an advanced low-pressure-loss vertical preheater, it effectively enhances preheating, allowing the decomposition rate of preheated limestone within the kiln to reach 20-25%. Furthermore, it can directly utilize fine-grained limestone (10-15mm), improving resource utilization. Reliable combined scale seals at both ends of the lime kiln ensure its sealing performance.
The lime kiln plays a crucial role in the calcination of high-grade cement in cement plants. It is also widely used in metallurgy, chemical engineering, construction, and other industries. The steel, calcium carbide, alumina, and refractory materials industries are particularly large consumers of lime, and these industries have experienced rapid growth in recent years.
The main component of lime is calcium carbonate. Through high-temperature calcination, calcium carbonate decomposes into calcium oxide and carbon dioxide, yielding quicklime. Auxiliary equipment of the lime kiln includes a feeding mechanism, a distributor, an air supply system, a combustion system, and an ash discharge system. In co-firing lime kilns, the feeding stage is crucial. It requires simultaneously loading fuel and limestone into the kiln and ensuring uniform distribution of the charge throughout the kiln through proper feeding, eliminating the wall effect and guaranteeing uniform heating across the entire kiln cross-section.
For gas-fired kilns, the burner is the core equipment. The burner mixes combustible gas with the required oxygen before sending it into the furnace for combustion. Different gases and kiln types require different types of flames. Therefore, the burner design has a decisive impact on the calcination effect of the lime kiln. Of course, other auxiliary equipment such as vent caps also play an important role, collectively ensuring the efficient and stable operation of the lime kiln.
