The lime rotary kiln is a highly efficient and reliable calcination system for limestone processing. Also known as a lime kiln, it features high production capacity, stable and quiet operation, and low overall energy consumption. As the core equipment in lime production lines, the lime rotary kiln provides significant industrial value and is widely adopted in the limestone processing industry.

Mainly used in lime production lines for limestone calcination.

1. Advanced Technology
The main drive system adopts advanced AC frequency conversion speed control technology. Compared with traditional electromagnetic and DC speed regulation systems, it offers improved energy efficiency, environmental friendliness, a wide speed regulation range, high transmission efficiency, precise speed control, and stable operation.

2. High Installation Accuracy and Reliability
After welding the bases of the supporting rollers and thrust rollers, vibration aging treatment is applied to eliminate welding stress. Integrated machining using large vertical lathes and boring–milling machines ensures high machining accuracy and strict shape and position tolerances, significantly improving the installation accuracy and overall reliability of the equipment.

3. Smooth and Stable Operation
Based on the characteristics of limestone and the requirements of the calcination process, the kiln head and kiln tail have been structurally optimized. This effectively solves common issues such as material backflow at the kiln tail and dust leakage, ensuring smoother and more natural material conveying.

4. Stable Product Quality
The limestone is uniformly heated during calcination, resulting in stable quicklime quality and a low over-burning rate. The kiln is particularly suitable for producing high-activity lime required in steelmaking applications.

5. Flexible Process Configuration
A vertical preheater can be installed at the kiln tail to fully utilize high-temperature flue gas generated during calcination. This allows limestone to be preheated from ambient temperature to the initial decomposition stage, improving lime activity while facilitating downstream transportation and storage.

Limestone is fed into the kiln through the chute at the kiln tail. Due to the inclination and slow rotation of the kiln body, the material rolls circumferentially and moves axially from the kiln tail toward the kiln head. Fuel is injected through the burner for combustion, generating heat that is transferred to the limestone through radiation, convection, and conduction.

During movement through the kiln, the limestone undergoes calcination and is converted into quicklime. The finished product is discharged from the kiln, while high-temperature flue gas exits the kiln and enters the dust collection system for further treatment.