矽肺是长期在矿山等场所从事生产而吸入含有二氧化矽的粉尘所致的全身性疾病 ;在肺脏表现为慢性纤维结节病变 ,逐步破坏正常的生理功能 ,产生呼吸困难 ,导致劳动力的减退或丧失。二氧化矽是矽肺的致病因子。二氧化矽来源分布甚广 ,如采矿和矿石加工 ;金属冶炼时的矿石粉碎、筛 Silicosis is a systemic disease caused by long-term inhalation of silica-containing dust in mines and other places. In the lungs, it manifests as chronic fibrosis of the nodules, gradually destroying normal physiological functions, causing dyspnea, leading to a decline in labor force or Lost. Silica is the pathogenic factor of silicosis. Silicon dioxide sources are widely distributed, such as mining and ore processing; metal smelting ore crushing, sieving