If thimerosal mercury antimony mine antimony (HgSb 2 S 7 and HgS · 2Sb 2 S 3). Such ore beneficiation not well isolated by methods HgS and Sb 2 S 3, must hydrometallurgical or pyrometallurgical methods were recovered. Practice has proved that the fire law process is superior. Figure 1 is a U.S. patent (No. 2,186,876) which is essentially calcined at a suitable temperature in a rotary kiln to convert HgS to mercury vapor evolution, while Sb 2 S 3 is oxidized to Sb 2 O 3 for discharge from the kiln. The former Soviet Union used fluidized roasting to treat this ore, and the extraction rate of mercury and antimony could exceed 90%.
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