选铜含氰废水处理试验研究

Experimental study on the treatment of cyanide-containing wastewater from copper beneficiation

摘要: 为实现选铜含氰废水的达标排放,以及有价金属的回收,采用过氧化氢氧化—改性活性炭吸附法进行处理,并对试验条件进行了优化。结果表明:在p H＝10、过氧化氢用量25 m L/L、搅拌速度200 r/m in、反应时间120 m in,改性活性炭用量20 g/L的最佳条件下,氰化物去除率高达99.91％,铜去除率达98.83％,金回收率95.56％,载金炭金品位0.022 mg/g。该研究有效解决了水循环利用“疲劳”问题,为工业应用提供参考。

Abstract: In order to realize the standard emission of cyanide-containing wastewater from copper beneficiation, and effectively recover valuable metals, hydrogen peroxide catalytic oxidation and activated carbon adsorption combined treatment is carried out and the experimental conditions are optimized. The results show that when pH is 10, hydrogen oxide dosage is 25 m L/L, agitation speed is 200 r/min, reaction time is 120 min, modified activated carbon dosage is 20 g/L, the cyanide removal rate can reach as high as 99.91％, copper removal rate 98.83％, gold recovery rate 95.56％ and gold grade of loaded carbon 0.022 mg/g. The study effectively solves water recycling fatigue and can be used as reference by industrial application.