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Study on the Extraction of Silver from High Arsenic Refractory Sulfur Concentrate
Author(s): 
Pages: 14-18
Year: Issue:  3
Journal: Precious Metals

Keyword:  nonferrous metals metallurgyhigh arsenicrefractorysulfur concentratecyanidation leachingextraction of silver;
Abstract: The silver bearing sulfur concentrate is refractory one due to its high arsenic and its fine silver minerals. The cyanidation leaching rate of silver was low (<80%) despite the sulfur concentrate was treated by fine grinding and chemical reagent. After oxidation roasting, the removal rates of As and S in concentrate reached 90% above, however the leaching rate was still low. The leaching rate was significantly improved when the concentrate was roasted by adding NaXY. The leaching rate can reach 85.15% and the consumption of NaCN reduced to 2.0 kg/t.
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