1. The kiln is designed with a advanced structure. Be Equipped with a vertical preheater of low pressure and low damage, which can improve the preheating effect. After the preheating procedure, there are 20-25% limestone has been decomposed. The fine fraction of limestone, 10-15mm, can be used directly. 

2. For the rotary kiln hoods sealing in the 2 ends, it uses the combined type scaly sealing. It makes sure the air leakage factor is less than 10%. Using compound type fire proofing material to reduce the radiogenic heat lost. 

3. The vertical cooler is a fill type that can be partitioned and ventilated. They are usually in round or a quadrate shape. The discharged lime temperature from it is usually at 800 ℃+Environment temperature. The lime is easy to convey and storage. Our lime rotary kiln can heating the auxiliary air to 7000℃， reducing the moving parts and special material need.