硫代硫酸盐
化学
活性炭
浸出(土壤学)
溶解
催化作用
湿法冶金
黄金提取
碳纤维
无机化学
氧化物
原电池
冶金
吸附
硫黄
有机化学
复合材料
土壤水分
材料科学
氰化物
复合数
土壤科学
环境科学
作者
Oscar G. Olvera,Daniel F.R. Domanski
标识
DOI:10.1016/j.hydromet.2019.06.005
摘要
The catalyzed thiosulfate leach of gold from oxide ores has been evaluated. The addition of fine activated carbon resulted in increased dissolution rates and gold recoveries. It was hypothesized that activated carbon and gold form galvanic couples, and that the rate of oxygen reduction increased due to the increased surface area available on activated carbon. The use of activated carbon as catalyst in the thiosulfate leach of gold is a process alternative that may not require the addition of surrogate oxidants (like copper), can work at temperatures as low as 30 °C, and thiosulfate degradations of 2.1 kg per ton of ore or lower, making it an attractive alternative for the leaching of gold.
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