What are the particle size requirements for raw materials in lime production
Lime, as an important industrial raw material, has strict requirements for the particle size of the raw materials in its production process. Appropriate granularity can not only improve production efficiency, but also ensure product quality.
In the production of ordinary calcium carbide, it is advisable to maintain the particle size of lime between 5 and 35mm. When enterprises produce lime themselves, the particle size should be controlled between 5 and 40mm, while the particle size of lime purchased externally should be maintained between 8 and 60mm, with a qualification rate of over 90%. If the particle size limit is too small, the powder content will be too high during use; If the particle size is too large, it may affect the subsequent reaction effect.
For environmentally friendly lime shaft kilns, it is preferred to choose limestone raw materials with uniform particle size and a size range of 40-80mm. The particle size range should be strictly controlled between 40-80mm, with no more than 10% for particles larger than 80mm, no more than 10% for particles smaller than 40mm, and no more than 1% for particles smaller than 10mm. This particle size range not only ensures the balance of filling density and airflow distribution, but also effectively avoids the occurrence of "raw burning" and "over burning" phenomena. At the same time, it is conducive to reducing dust generation in the shaft kiln, simplifying the exhaust gas treatment process, and improving environmental performance.
In the production of metallurgical lime, the particle size of limestone is also strictly controlled between 40-80mm, and it is necessary to ensure that most of the limestone has a regular appearance. The appropriate particle size helps to improve the activity of lime, which has a significant impact on the quality and energy consumption of steelmaking products.
The particle size of raw materials can also affect the firing speed and product quality of lime. Excessive or insufficient particle size can affect the firing speed and product quality of lime. By screening and crushing, the particle size distribution of raw materials can be made more uniform and moderate, which is beneficial for improving the firing effect and product quality of lime.
