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湖南雄黄矿为我国最大雄黄(As_2S_2)产地,矿石品位较高,70—90％以上者可用作药材,品位较低者(30％左右)经焙烧,生产白砒(As_2O_3)。井下空气中粉尘(含有硫化砷并含游离SiO_24—14％)浓度最高达35.17mg/m~3,一般为10mg/m~3,有时爆破发生事故,引起雄黄自燃,产生部分As_2O_3;经测定井下氡及其子体未超过放射防护规定标准。地面的白砒冶炼时主要产生As_2O_3粉尘及SO_2气体,1968年测定生产环
Xionghuang mine in Hunan is the largest producer of As_2S_2 in China with a high grade of ore, which can be used as medicine for more than 70-90%. The lower grade (30%) is roasted to produce As_2O_3. Downhole air dust (containing arsenic sulfide and containing free SiO_24-14%) concentration up to 35.17mg / m ~ 3, usually 10mg / m ~ 3, and sometimes blasting accident, causing realgar spontaneous combustion, resulting in some As_2O_3; Radon and its progeny do not exceed the standard of radiological protection. Asparagus smelting on the ground mainly produces As_2O_3 dust and SO_2 gas, the determination of the production ring in 1968