Application of bag-type dust collector in cement production process - raw material crushing

    The whole process of cement production includes five links: raw material crushing, raw material grinding, clinker calcination, cement grinding and finished product packaging. Each link will produce a lot of dust. Improper treatment will not only pollute the environment, violate the laws and regulations, but also damage the health of operators and affect the production efficiency. With the advantages of high filtration precision, strong adaptability and stable operation, the bag-type dust collector has become the preferred solution for dust control in the whole cement production process.

    Raw material crushing (limestone, clay, etc.) is the first dust pollution source for cement production, with dust concentration of 50-150g/m³, mainly coarse particles (10-100μm), containing a large amount of quartz sand powder, with strong abrasiveness, moderate temperature (30-60℃) and no obvious corrosivity.

   Pulse bag-type dust collector is selected for this link, and cyclone dust collector is installed in the front for pretreatment to remove more than 70% coarse particles in advance and reduce the load of filter bag. Wear-resistant mixed polyester filter material with a thickness ≥ 1.5mm is preferred as the filter material of bag-type dust collector, and the filtration air velocity is controlled within 1.0-1.2m/min to avoid abrasion caused by excessively high air velocity. Low-pressure pulse injection is adopted for the ash removal system, with the injection pressure of 0.5-0.6MPa and the injection time of 0.15-0.2s, so as to ensure the complete dust stripping and the service life of the filter bag can reach more than 12 months.