某黄金冶炼厂采用湿法工艺处理氰化金泥,针对湿法提取后废水中的金、银,分别进行了活性炭吸附工艺和铁粉置换工艺的综合回收试验研究. 试验结果表明:采用活性炭吸附工艺,金、银吸附率分别为 99 . 45 %、46 . 24 %;采用铁屑置换工艺,金、银置换率分别达到 99 . 45 %、87. 10 %,尾液中的金、银质量浓度分别降低至0. 01 mg/L、0. 12 mg/L,均取得了理想的技术指标;不但综合回收了湿法提取后废水中金、银,减少了贵金属的损失,而且也可以为企业创造一定的经济效益.
One gold smeltery uses hydrometallurgical processes to treat gold mud after cyanidation. Experimental research on the comprehensive recovery of gold and silver from hydrometallurgical wastewater is carried out based re-spectively on activated carbon adsorption and iron powder precipitation methods. The results show that with activated carbon adsorption,the adsorption rates of gold and silver are 99. 45 % and 46. 24 % respectively; with iron powder precipitation,the precipitation rates of gold and silver are 99. 45 % and 87. 10 % respectively,and the mass concen-trations of gold and silver in tailing solutions are reduced to 0. 01 mg/L and 0. 02 mg/L respectively,both achieving satisfactory technical index;the gold and silver content in hydrometallurgical wastewater is reduced,making full use of precious metals and creating certain profits for enterprises.
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