酸焙浸法处理AVR工艺铜沉淀

IF 0.9 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Russian Journal of Non-Ferrous Metals Pub Date : 2025-08-11 DOI:10.1134/S1067821224600662

Yong Il Kim, Kwang Hyok Rim, Chol Min Yu, Su Bong Pyon, Kuk Chol Kim

{"title":"酸焙浸法处理AVR工艺铜沉淀","authors":"Yong Il Kim, Kwang Hyok Rim, Chol Min Yu, Su Bong Pyon, Kuk Chol Kim","doi":"10.1134/S1067821224600662","DOIUrl":null,"url":null,"abstract":"Copper precipitate comes from cyanidation wastewater treatment process using AVR (acidification-volatilization-regeneration) technology in a Korean gold plant and typically assays 44.53 wt % Cu, 5.56 wt % Fe and 16.81 wt % S. CuSCN and Cu2Fe(CN)6 are major copper compounds in the precipitate and in the past it has been sold as raw material for pyrometallurgy of copper. Low-temperature (\\( \\leqq {\\kern 1pt} 250^\\circ {\\text{C}}\\)) sulfuric acid baking followed by acid leaching has been evaluated in order to recover copper and the experimental results showed that by acid baking under following condition: 250°C, 60 min and ratio of 98 wt % H2SO4/copper precipitate 2.4, ~98.5 wt % copper was released to the leach solution. During baking Cu2Fe(CN)6 preferentially reacted with sulfuric acid over CuSCN. The leachate containing Cu and Fe can be sent to conventional SX-EW process to produce electrolytic copper. And a little residue (~3.2 wt % of copper precipitate weight) is formed after acid leaching, Cu content in it is 20.8 wt % and Cu2S and CuS are major copper compounds. Possible reactions were proposed for sulfuric acid baking of copper precipitate. HCN formed during baking is reoxidized to CO2 and N2, so recovery of cyanide during baking is of no significance. Based on this investigation, new process for treatment of copper precipitate is proposed for copper recovery. The process mainly consists of acid baking, acid leaching and SX-EW. And treatment of off-gas is needed in view of environmental issue.","PeriodicalId":765,"journal":{"name":"Russian Journal of Non-Ferrous Metals","volume":"66 2","pages":"55 - 64"},"PeriodicalIF":0.9000,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Acid Baking-Leaching Process for Treatment of Copper Precipitate from AVR Process\",\"authors\":\"Yong Il Kim, Kwang Hyok Rim, Chol Min Yu, Su Bong Pyon, Kuk Chol Kim\",\"doi\":\"10.1134/S1067821224600662\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Copper precipitate comes from cyanidation wastewater treatment process using AVR (acidification-volatilization-regeneration) technology in a Korean gold plant and typically assays 44.53 wt % Cu, 5.56 wt % Fe and 16.81 wt % S. CuSCN and Cu2Fe(CN)6 are major copper compounds in the precipitate and in the past it has been sold as raw material for pyrometallurgy of copper. Low-temperature (\\\\( \\\\leqq {\\\\kern 1pt} 250^\\\\circ {\\\\text{C}}\\\\)) sulfuric acid baking followed by acid leaching has been evaluated in order to recover copper and the experimental results showed that by acid baking under following condition: 250°C, 60 min and ratio of 98 wt % H2SO4/copper precipitate 2.4, ~98.5 wt % copper was released to the leach solution. During baking Cu2Fe(CN)6 preferentially reacted with sulfuric acid over CuSCN. The leachate containing Cu and Fe can be sent to conventional SX-EW process to produce electrolytic copper. And a little residue (~3.2 wt % of copper precipitate weight) is formed after acid leaching, Cu content in it is 20.8 wt % and Cu2S and CuS are major copper compounds. Possible reactions were proposed for sulfuric acid baking of copper precipitate. HCN formed during baking is reoxidized to CO2 and N2, so recovery of cyanide during baking is of no significance. Based on this investigation, new process for treatment of copper precipitate is proposed for copper recovery. The process mainly consists of acid baking, acid leaching and SX-EW. And treatment of off-gas is needed in view of environmental issue.\",\"PeriodicalId\":765,\"journal\":{\"name\":\"Russian Journal of Non-Ferrous Metals\",\"volume\":\"66 2\",\"pages\":\"55 - 64\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2025-08-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Journal of Non-Ferrous Metals\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1067821224600662\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Non-Ferrous Metals","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1134/S1067821224600662","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

摘要

铜沉淀来自韩国一家金矿厂采用AVR（酸化-挥发-再生）技术的氰化废水处理过程，通常测定值为44.53 wt % Cu, 5.56 wt % Fe and 16.81 wt % S. CuSCN and Cu2Fe(CN)6 are major copper compounds in the precipitate and in the past it has been sold as raw material for pyrometallurgy of copper. Low-temperature (\( \leqq {\kern 1pt} 250^\circ {\text{C}}\)) sulfuric acid baking followed by acid leaching has been evaluated in order to recover copper and the experimental results showed that by acid baking under following condition: 250°C, 60 min and ratio of 98 wt % H2SO4/copper precipitate 2.4, ~98.5 wt % copper was released to the leach solution. During baking Cu2Fe(CN)6 preferentially reacted with sulfuric acid over CuSCN. The leachate containing Cu and Fe can be sent to conventional SX-EW process to produce electrolytic copper. And a little residue (~3.2 wt % of copper precipitate weight) is formed after acid leaching, Cu content in it is 20.8 wt % and Cu2S and CuS are major copper compounds. Possible reactions were proposed for sulfuric acid baking of copper precipitate. HCN formed during baking is reoxidized to CO2 and N2, so recovery of cyanide during baking is of no significance. Based on this investigation, new process for treatment of copper precipitate is proposed for copper recovery. The process mainly consists of acid baking, acid leaching and SX-EW. And treatment of off-gas is needed in view of environmental issue.

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Acid Baking-Leaching Process for Treatment of Copper Precipitate from AVR Process

查看原文本刊更多论文

Acid Baking-Leaching Process for Treatment of Copper Precipitate from AVR Process

Copper precipitate comes from cyanidation wastewater treatment process using AVR (acidification-volatilization-regeneration) technology in a Korean gold plant and typically assays 44.53 wt % Cu, 5.56 wt % Fe and 16.81 wt % S. CuSCN and Cu₂Fe(CN)₆ are major copper compounds in the precipitate and in the past it has been sold as raw material for pyrometallurgy of copper. Low-temperature (\( \leqq {\kern 1pt} 250^\circ {\text{C}}\)) sulfuric acid baking followed by acid leaching has been evaluated in order to recover copper and the experimental results showed that by acid baking under following condition: 250°C, 60 min and ratio of 98 wt % H₂SO₄/copper precipitate 2.4, ~98.5 wt % copper was released to the leach solution. During baking Cu₂Fe(CN)₆ preferentially reacted with sulfuric acid over CuSCN. The leachate containing Cu and Fe can be sent to conventional SX-EW process to produce electrolytic copper. And a little residue (~3.2 wt % of copper precipitate weight) is formed after acid leaching, Cu content in it is 20.8 wt % and Cu₂S and CuS are major copper compounds. Possible reactions were proposed for sulfuric acid baking of copper precipitate. HCN formed during baking is reoxidized to CO₂ and N₂, so recovery of cyanide during baking is of no significance. Based on this investigation, new process for treatment of copper precipitate is proposed for copper recovery. The process mainly consists of acid baking, acid leaching and SX-EW. And treatment of off-gas is needed in view of environmental issue.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Russian Journal of Non-Ferrous Metals METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.90

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： Russian Journal of Non-Ferrous Metals is a journal the main goal of which is to achieve new knowledge in the following topics: extraction metallurgy, hydro- and pirometallurgy, casting, plastic deformation, metallography and heat treatment, powder metallurgy and composites, self-propagating high-temperature synthesis, surface engineering and advanced protected coatings, environments, and energy capacity in non-ferrous metallurgy.