低温碱性熔炼分离富集铜阳极泥中的有价金属

来源期刊:中国有色金属学报2015年第8期

论文作者:郭学益 许志鹏 田庆华 李栋

文章页码:2243 - 2251

关键词:低温碱性熔炼;铜阳极泥;有价金属;分离;富集

Key words:low-temperature alkaline smelting; copper anode slime; valuable metal; separation; enrichment

摘    要:采用低温碱性熔炼处理铜阳极泥(CAS),研究熔炼浸出过程各有价金属的分离富集行为。分析碱料比、熔炼温度、熔炼时间、浸出温度、浸出时间和液固比等6个因素对金属浸出率的影响。结果表明:优化条件为碱料比为0.5,熔炼温度为600 ℃,熔炼时间为60 min,浸出温度为70 ℃,浸出时间为60 min,液固比为12.5 mL/g。在此优化条件下,Se和As 的浸出率分别达95.79%和96.83%,Cu、Pb、Sb和Te的浸出率分别为0.16%、3.36%、1.02%和0.05%,实现了铜阳极泥中有价金属的有效分离和富集。

Abstract: The valuable metals were separated from copper anode slime (CAS) by low-temperature alkaline smelting process. The effects of the mass ratio of NaOH, smelting temperature, smelting time, leaching temperature, leaching time and liquid-solid ratio on the leaching efficiency of metals were investigated. The results show that the optimum conditions are determined as follows: m(NaOH)/m(CAS) is 0.5, smelting temperature is 600 ℃, smelting time is 60 min, leaching temperature is 70 ℃, leaching time is 60 min and liquid-solid ratio is 12.5 mL/g. Under the optimum conditions, leaching efficiencies of Se and As are 95.79% and 96.83%, while the leaching efficiencies of Cu, Pb, Sb and Te are 0.16%, 3.36%, 1.02% and 0.05%, respectively, leading to the separation and enrichment of valuable metals from copper anode slime relatively.

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