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尾矿中锌解吸-电动-硫化钠沉淀联合修复

Qi MENG,Ying-jie ZHANG,Peng DONG

The Chinese Journal of Process Engineering（2017）

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Abstract
对某含锌尾矿进行解吸-电动-硫化钠沉淀联合修复,去除尾矿锌重金属,考察了尾矿颗粒微观变化.结果表明,柠檬酸具有酸性和络合作用双重特性,其对锌的解吸率较优,可用作该尾矿解吸剂.较高电压梯度有助于增大电流,加快离子移动,提升去除率,但过高会带来更大能耗,以1.5 V/cm为宜,锌去除率可达67.32％.尾矿中弱酸可提取态锌和铁锰氧化态锌去除率分别为93.18％和63.16％.尾矿颗粒晶体及表面在修复后被破坏,有利于离子移动和修复指标提升.用0.006 mol/L Na2S沉淀除锌后,阴极液可再次用作阳极补充液.
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