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Golconda 公司研制出一种氰化物再生方法,能从提金后的贫液中回收95%的残余氰化物,使生产成本大大下降,也避免污染环境。该法的化学式如下:2NaCN+H_2SO_4→Na_2SO_4+2HCN贫液中添加硫酸,反应产生氰化氢,然后用空气流将其洗提出来并同碱性溶液接触,还原成氰化钠。
Golconda has developed a method of cyanide regeneration, 95% of the residual cyanide can be recovered from the lean after leaching gold, so that the cost of production dropped significantly, but also to avoid environmental pollution. The chemical formula is as follows: 2NaCN + H_2SO_4 → Na_2SO_4 + 2HCN lean solution added sulfuric acid, the reaction of hydrogen cyanide, and then air stream was stripped out and contact with the alkaline solution, reduced to sodium cyanide.