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2009•Hydrometallurgy of ChinaRequires access

Experiment Research on Pre-oxidation by Moderate Bacteria and Leaching by Cyanide for A Refractory Gold Concentrate

Dai Hong-guang

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Abstract

Pre-oxidation by moderate bacteria and leaching by cyanide for a refractory gold concentrate containing arsenic,sulfur,carbon and antimony have been researched.The shaker and semicontinuity leaching tests have carried on.Pulp concentration is of 15%.Pre-oxidation time is 10 d and 6~7 d in shaker and semicontinuity cyanide leaching tests,respectively.The conditions of cyanide leaching are NaCN dosage of 6 kg/t,liquid to solid of 2∶1,leaching time of 24 h.Leaching of gold is 80.32% and 86.32%,respectively.

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What this paper is about

Pre-oxidation by moderate bacteria and leaching by cyanide for a refractory gold concentrate containing arsenic,sulfur,carbon and antimony have been researched.The shaker and semicontinuity leaching tests have carried on.Pulp concentration is of 15%.Pre-oxidation time is 10 d and 6~7 d in shaker and semicontinuity cyanide leaching tests,respectively.The conditions of cyanide leaching are NaCN dosage of 6 kg/t,liquid to solid of 2∶1,leaching time of 24 h.Leaching of gold is 80.32% and 86.32%,respectively.

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Available abstract

Pre-oxidation by moderate bacteria and leaching by cyanide for a refractory gold concentrate containing arsenic,sulfur,carbon and antimony have been researched.The shaker and semicontinuity leaching tests have carried on.Pulp concentration is of 15%.Pre-oxidation time is 10 d and 6~7 d in shaker and semicontinuity cyanide leaching tests,respectively.The conditions of cyanide leaching are NaCN dosage of 6 kg/t,liquid to solid of 2∶1,leaching time of 24 h.Leaching of gold is 80.32% and 86.32%,respectively.

Key concepts: Leaching (pedology), Gold cyanidation, Cyanide, Arsenic, Sulfur, Chemistry, Antimony, Lixiviant

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