What is the overburning rate of lime calcined in a vertical kiln
The overburning rate of lime in vertical kilns is a key indicator in the production process, which directly affects product quality and production costs. Raw burning refers to the incomplete decomposition of limestone resulting in a low content of calcium oxide, while over burning refers to excessive calcination leading to a decrease in product activity. In actual production, this ratio is usually maintained within the range of 8% to 10%, which is in line with the actual operating level of most ordinary vertical kilns at present. Controlling the overheating rate is of great significance for improving the economic efficiency of enterprises.
To achieve a lower burn-in rate, multiple factors need to be considered comprehensively. The particle size uniformity and chemical composition stability of limestone raw materials are fundamental conditions, and the fuel calorific value and combustion uniformity are also crucial. The stability of temperature distribution inside the vertical kiln has a significant impact on the calcination process, and it is necessary to maintain the temperature within an appropriate range and reduce fluctuations during operation. The application of modern control technologies such as automated batching systems and precise control of kiln temperature has played an important role in improving calcination efficiency. The synergistic effect of these measures can effectively control the rate of overheating.
Some advanced lime kilns and vertical kilns can control the over burning rate at a level of about 3% through refined management. This requires the selection of high-quality limestone and strict particle size screening, the use of high calorific value clean fuels and optimized burner design, while relying on advanced control systems to achieve real-time and precise adjustment of calcination parameters. Maintaining uniform ventilation inside the kiln and uniform material descent can also help improve the uniformity of calcination. Reaching this level indicates that the production process is in an ideal state and the product quality rate has significantly improved.
The overburning rate of lime in vertical kilns is an important measure of production level. It is common for ordinary enterprises to maintain it at 8% to 10%, but through technical and management optimization, it can be reduced to about 3%. This reflects the improvement of production accuracy and energy efficiency, and has practical value for energy conservation, consumption reduction, and quality improvement in the industry.
