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研究了碱性体系中铜冶炼烟尘的选择性脱砷。根据热力学计算结果推测,砷可溶于碱性体系,且过量的碱会导致铜、铅复溶。试验结果表明:在碱初始质量浓度100 g/L、温度80℃、液固体积质量比5∶1、反应时间2 h条件下,烟尘经二级逆流浸出,砷浸出率达94%以上,开路浸出液中铜、铅质量浓度分别降至0.03和0.05 g/L左右,实现了选择性高效脱砷。
Abstract：A new process for selective removal of arsenic in copper smelting dust by alkaline leaching was studied.Arsenic was dissolved in the alkaline system,and excessive alkali lead to copper and lead redissolution.The experimental results show that the leaching rate of arsenic is more than 94%,and the concentration of copper and lead in the open leaching solution is reduced to about 0.03 g/L and 0.05 g/L,respectively,under the conditions of initial basicity of 100 g/L,leaching temperature of 80 ℃,liquid-to-solid ratio of 5/1 and reaction time of 2 h.The two level countercurrent leaching of dust was carried out.
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基本信息:
DOI：10.13355/j.cnki.sfyj.2019.06.013
中图分类号:X758
引用信息:
[1]吴星琳,罗仁昆,李涛,等.铜冶炼烟尘碱浸除砷试验研究[J].湿法冶金,2019,38(06):488-493.DOI:10.13355/j.cnki.sfyj.2019.06.013.
基金信息:
固体废弃物资源化利用福建省高校工程研究中心开放基金资助项目(LYGF-2017)