What should be noted during the calcination operation of lime vertical kiln
The calcination operation of lime vertical kiln directly affects product quality and production efficiency, and special attention should be paid to raw material management, temperature control, airflow regulation, and safe operation.
1. Raw material control
Limestone quality: Select raw materials with CaCO3 content ≥ 90% and low impurities to avoid the influence of sulfur, silicon and other components on the calcination effect.
Particle size control: Maintain a uniform particle size of 40-80mm. If the particle size is too large, it may cause burning, while if it is too small, it will increase the resistance inside the kiln and affect the distribution of airflow.
Uniform material distribution: Using a rotating material feeder or mechanical material distribution device to ensure uniform distribution of the material layer in the kiln, preventing deviation or agglomeration.
2. Temperature management
Calcination temperature: controlled at 900-1200 ℃. Too low can lead to insufficient lime activity, while too high can easily cause overburning.
Real time monitoring: using thermocouples, infrared thermometers and other equipment, combined with PLC system to automatically adjust fuel supply and maintain temperature stability.
Avoid local high temperatures: prevent kiln wall ring formation or material sintering, which may affect normal calcination.
3. Airflow regulation
Reasonable air distribution: Adjust the air volume of the drum and the induced draft to ensure that the airflow inside the kiln rises evenly, avoiding bias or short circuiting of the airflow.
Wind pressure control: Maintain appropriate wind pressure to prevent unstable calcination caused by pressure fluctuations inside the kiln.
4. Safety and Maintenance
Regular inspection: Observe key parts such as the kiln body, refractory materials, and burner, and promptly address wear or nodule issues.
CO monitoring: prevent gas leakage or insufficient combustion from causing CO accumulation, ensuring operational safety.
Emergency measures: Develop emergency plans such as kiln shutdown and cooling to avoid sudden malfunctions affecting production.
conclusion
The calcination operation of lime vertical kiln requires refined management, with strict control over raw materials, temperature, airflow, and safe operation to ensure efficient, stable, and safe production.
