硫酸盐化焙烧-水浸回收锌浸渣中有价金属（英文）

发布时间：2018-07-06 14:01

本文选题：锌浸渣 + 硫酸盐化焙烧　；参考：《Transactions of Nonferrous Metals Society of China》2017年05期

【摘要】：锌浸渣产生于传统湿法炼锌过程,它是一种危险废物同时也是一种潜在的有价固体废物。用硫酸盐化焙烧-水浸的组合工艺对锌浸渣中有价金属进行回收。首先,锌浸渣在640°C下与硫酸铁进行混合焙烧,硫酸铁/铁酸锌摩尔比为1.2,硫酸盐化焙烧时间为1 h。在此过程中,废渣中的有价金属转化为可溶的硫酸盐,而铁以氧化铁形式存在。随后,采用水浸法提取有价金属硫酸盐,渣中锌、锰、铜、镉、铁的回收率分别为92.4%、93.3%、99.3%,91.4%,1.1%。对水浸处理后的废渣进行浸出毒性检测。结果表明,上述工艺可以有效地实现锌浸渣的无害化处理,处理后各重金属浸出毒性均低于限值。
[Abstract]:Zinc leaching residue is produced in the traditional process of zinc hydrometallurgy. It is a hazardous waste and a potential solid waste. The combined process of sulphuric acid roasting and water leaching is used to recover the valuable metals in the zinc leaching residue. First, zinc leaching residue is mixed with iron sulphate under 640 C, and the molar ratio of ferric sulfate to zinc ferrate is 1.2 and sulphate is sulphate. The calcination time is 1 h.. In this process, the valuable metal in the waste residue is converted to soluble sulfate, and iron exists in the form of iron oxide. Then, the metal sulfate is extracted by water leaching, and the recovery rate of zinc, manganese, copper, cadmium and iron in the slag is 92.4%, 93.3%, 99.3%, 91.4%, respectively. The leaching toxicity of the waste residue after water leaching is detected. The results show that the above process can effectively realize the harmless treatment of zinc leaching residue, and the leaching toxicity of heavy metals after treatment is lower than the limit value.
【作者单位】：中南大学冶金与环境学院;长沙赛恩斯环保科技有限公司;中南大学国家重金属污染防治工程技术研究中心;
【基金】：Project(2014FJ1011)supported by Key Project of Science and Technology of Hunan Province,China Project(201509050)supported by Program for Special Scientific Research Projects of National Public Welfare Industry
【分类号】：TF111.3;X758

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