PPE

How to choose dust mask correctly for cement workers

1. Ordinary cotton gauze mask generally has a certain blocking ability for large size solid particles and fibers, and its protection ability is very poor for small particles (less than 10um) that can be inhaled into the lung, especially for very small particles (0.1-1um) that are easy to cause great loss to the lung. According to the national standard gb2626-2006, the dust-proof ability of the dust-proof mask was preliminarily tested, and it was found that the filtration efficiency of the dust-proof mask was generally less than 20%2. 1n the cement manufacturing industry, what kind of mask is suitable for workers should also be considered comprehensively. For example, the specific content of the operation activities, the dust concentration of the operation site, the operation time, the efficiency of the dust removal facilities and other factors. For specific selection principles, please refer to the national standard: GB / T 18664-2002 selection, use and maintenance of respiratory protective equipment. However, due to the high dust concentration, fine particles and easy to absorb water and agglomerate in the current cement manufacturing work site in China, the first consideration should be to increase or improve the dust removal facilities and their effects. On this basis, the dust mask should be considered. When selecting the dust mask, it should not only consider the high dust capacity, but also the low dust resistance We should also consider the higher filtration efficiency (especially for very fine particles), and choose the mask with exhalation valve. Not only that, we must pay attention to the daily maintenance, air tightness inspection and replacement plan of the mask< 3. There is no regulation on the selection of masks for pneumoconiosis prevention in China. However, for the selection principle of masks, please refer to the national standard: GB / T 18664-2002 selection, use and maintenance of respiratory protective equipment China labor insurance net

Back to list