Clean Stepwise Extraction of Valuable Components from Electrolytic Manganese Residue via Reducing Leaching–Roasting,ACS Sustainable Chemistry & Engineering

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Clean Stepwise Extraction of Valuable Components from Electrolytic Manganese Residue via Reducing Leaching–Roasting
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-06-10 , DOI: 10.1021/acssuschemeng.0c09286
Xuli Li _{1,

2} , Min Zhou _{1,

2} , Fangyuan Chen _{1,

2} , Jiahao Li _{1,

2} , Yixin Li _{1,

2} , Yi Wang _{1,

2} , Haobo Hou _{1,

2}

Affiliation

Electrolytic manganese residue (EMR) is a solid waste that poses a significant environmental risk. With the importance of environmental sustainability, a harmless utilization process for EMR should be developed. In this study, a clean process of stepwise extraction was proposed to recover valuable components from EMR. First, the mineral phase composition of EMR was determined using a mineral liberation analyzer. Then, a weak acid reducing agent was used on the basis of the valence characteristics of metal elements to extract valuable elements. The recoveries of manganese and iron were 96.04 and 89.64%, respectively. After valuable metallic elements were separated from EMR, silicon was found to be the main component. As such, the feasibility of converting EMR into silicon-source nutrition powder was verified. Through silicon activation, the effective silicon content of EMR increased from 0.13 to 9.81%. Toxicity leaching tests revealed that the process promoted safe EMR utilization. Thus, the whole process reduces the need not only for ore mining but also for EMR inventory to avoid harmful solid waste pollution in the environment, thereby achieving a zero-waste approach.

中文翻译：

通过减少浸出-焙烧从电解锰渣中清洁逐步提取有价成分

电解锰渣 (EMR) 是一种固体废物，对环境构成重大威胁。鉴于环境可持续性的重要性，应开发 EMR 的无害利用过程。在这项研究中，提出了一种清洁的逐步提取过程，以从 EMR 中回收有价值的成分。首先，使用矿物释放分析仪确定 EMR 的矿物相组成。然后根据金属元素的价态特征，使用弱酸还原剂提取有价元素。锰和铁的回收率分别为 96.04% 和 89.64%。从 EMR 中分离出有价值的金属元素后，发现硅是主要成分。由此验证了将EMR转化为硅源营养粉的可行性。通过硅激活，EMR 的有效硅含量从 0.13% 增加到 9.81%。毒性浸出测试表明，该过程促进了安全的 EMR 使用。因此，整个过程不仅减少了对矿石开采的需求，还减少了 EMR 库存的需求，从而避免了环境中有害的固体废物污染，从而实现了零废物的方法。

更新日期：2021-06-21

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