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化工进展  2015 

镍火法冶炼废渣中钴、镍回收的研究进展

DOI: 10.16085/j.issn.1000-6613.2015.04.040, PP. 1133-1138

Keywords: 浸出,废物处理,回收,冶炼废渣,处理方法

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Abstract:

综述了镍火法冶炼废渣中钴、镍等有价金属资源综合回收技术.通过回顾镍火法冶炼过程中产生的典型废渣的物相研究以及渣中钴、镍等有价金属回收的研究现状,分析和讨论了主要处理镍冶炼废渣工艺的优势及存在的缺陷,展望了研究方向和趋势.指出选矿法尽管能够经济地实现钴、镍富集的目的,但存在原料适用范围狭窄的局限性;火法处理工艺存在能耗高,会产生气态污染物的缺陷;微生物浸出工艺存在反应速率低的问题,但具有工艺简单、投资少等优点,是极具发展前景的研究方向.氧压酸浸能够高选择性浸出钴、镍,钴、镍的回收率高,过程无有害废弃物产生,环境友好,是今后提取废渣中钴、镍的可取方法.炉渣缓冷、焙烧或还原预处理后再进行氧压酸浸,浸出过程中加入含镍的磁黄铁矿等尾矿替代硫酸作为浸出剂,是氧压浸出工艺的发展趋势.

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