人体长期吸入生产性粉尘,可引起尘肺,尘肺的种类很多,如矽肺、煤肺、石棉肺、滑石肺、云母肺、电焊工尘肺等。其中以矽肺最为多见。矽肺是由于长期吸入含有二氧化硅的粉尘所致。产生粉尘的有害作业很多,如采矿与矿石加工、采石、开凿隧道、筑路劈山;金属冶炼时的矿石粉碎、过筛、运输等;金属铸造中的配砂、清砂以及耐火材料、玻璃、水泥、陶瓷等工业,均可产生大量粉尘。如果人体长期在生产条件不好的环境中从事以上工作,粉尘浓度,特别是二氧化硅浓度很高,又缺乏个 Long-term human inhalation of productive dust, can cause pneumoconiosis, pneumoconiosis many types, such as silicosis, coal lungs, asbestosis, talc, mica lungs, welders pneumoconiosis. One of the most common silicosis. Silicosis is due to long-term inhalation of silica-containing dust. There are many harmful operations that produce dust, such as mining and ore processing, quarrying, tunneling, road building and hill cutting; metal smelting ore crushing, screening, transportation, etc .; metal foundry with sand, sand and refractory materials, glass , Cement, ceramics and other industries, can produce a lot of dust. If the human body has long been engaged in the above work in an environment with poor production conditions, the dust concentration, especially the high concentration of silica, lacks