Copper, Zinc, and Lead Recovery from Jarosite Pb–Ag Tailings Waste (Part 2)

IF 2.2 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Minerals Pub Date : 2024-07-31 DOI:10.3390/min14080791
Vesna Conić, Miloš Janošević, Dragana S. Božić, Ljiljana Avramović, Ivana Jovanović, Dejan M. Bugarin, Stefan Đorđievski
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引用次数: 0

Abstract

The present paper describes the technological solution for obtaining Cu, Zn, Pb, and Ag from jarosite waste raw material, with its simultaneous separation from In and Fe. By roasting at low temperatures, iron was transformed from the Fe2(SO4)3 form into Fe2O3, which is insoluble in water and slightly soluble in acid. Copper sulfate and zinc sulfate are present in jarosite as sulfates. During temperature roasting, the copper and zinc were still in the form of CuSO4 and ZnSO4, i.e., they were easily dissolved in water. This procedure led to good selectivity of Cu and Zn compared to Fe. After water leaching, PbSO4 and Ag2SO4 remained in the solid residue. By treating jarosite with a content of 0.7% Cu, 5.39% Zn, and 5.68% Pb, products of commercial quality were obtained. By roasting jarosite in an electric furnace and leaching the roasted sample in water, leaching degrees of 91.07%, 91.97%, and 9.60% were obtained for Cu, Zn, and Fe, respectively. Using 1 M NaOH in the leaching solution, 99.93% Fe was precipitated to pH = 4. Cu in the form of CuSO4 was further treated by cementation with Zn, after which cement copper was obtained as a commercial product. Zn in the form of ZnSO4 was further treated by precipitation with Na2CO3 to obtain ZnCO3 concentrate of commercial grade. The total recovery of Pb and Ag, which were treated by chloride leaching, was 96.05% and 87.5%, respectively. The resulting NaPbCl3 solution was further treated with Na2CO3 solution, whereby PbCO3 was obtained as a commercial product. The produced PbCO3 could be further subjected to roasting to obtain soluble PbO. In these investigations, PbCO3 was smelted where a Pb anode was obtained; this was electrolytically refined to a Pb cathode. The proposed process does not pollute the environment with As and Cd.
从 Jarosite 铅-银尾矿废料中回收铜、锌和铅(第 2 部分)
本文介绍了从红柱石废原料中获取铜、锌、铅和银的技术解决方案,并同时将其从铟和铁中分离出来。通过低温焙烧,铁由 Fe2(SO4)3 形态转化为 Fe2O3,Fe2O3 不溶于水,微溶于酸。硫酸铜和硫酸锌以硫酸盐的形式存在于红柱石中。在温度焙烧过程中,铜和锌仍以 CuSO4 和 ZnSO4 的形式存在,即容易溶于水。与铁相比,这种方法对铜和锌具有良好的选择性。水浸后,PbSO4 和 Ag2SO4 仍留在固体残留物中。通过处理铜含量为 0.7%、锌含量为 5.39%、铅含量为 5.68%的金刚石,可获得商业质量的产品。通过在电炉中焙烧金刚石并在水中浸出焙烧样品,铜、锌和铁的浸出率分别为 91.07%、91.97% 和 9.60%。在浸出液中使用 1 M NaOH,可使 99.93% 的铁沉淀至 pH = 4。CuSO4 形式的 Cu 通过与 Zn 的胶结进一步处理后,获得了胶结铜这种商业产品。以 ZnSO4 形式存在的 Zn 通过与 Na2CO3 一起沉淀的方式进一步处理,以获得商品级的 ZnCO3 精矿。经氯化浸出处理的铅和银的总回收率分别为 96.05% 和 87.5%。生成的 NaPbCl3 溶液用 Na2CO3 溶液进一步处理,从而获得商业产品 PbCO3。生成的 PbCO3 还可以进一步焙烧,以获得可溶性 PbO。在这些研究中,对 PbCO3 进行了熔炼,得到了铅阳极;然后通过电解精炼得到了铅阴极。拟议的工艺不会对环境造成砷和镉污染。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Minerals
Minerals MINERALOGY-MINING & MINERAL PROCESSING
CiteScore
4.10
自引率
20.00%
发文量
1351
审稿时长
19.04 days
期刊介绍: Minerals (ISSN 2075-163X) is an international open access journal that covers the broad field of mineralogy, economic mineral resources, mineral exploration, innovative mining techniques and advances in mineral processing. It publishes reviews, regular research papers and short notes. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.
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