Article(id=1236327871682245048, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236327863171993957, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2023.02.025, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1662134400000, receivedDateStr=2022-09-03, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772693134469, onlineDateStr=2026-03-05, pubDate=1680278400000, pubDateStr=2023-04-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772693134469, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772693134469, creator=13701087609, updateTime=1772693134469, updator=13701087609, issue=Issue{id=1236327863171993957, tenantId=1146029695717560320, journalId=1235980550691926019, year='2023', volume='43', issue='2', pageStart='1', pageEnd='170', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772693132441, creator=13701087609, updateTime=1772693403732, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236329001107640372, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236327863171993957, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236329001107640373, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236327863171993957, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=109, endPage=113, ext={EN=ArticleExt(id=1236327872131035594, articleId=1236327871682245048, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Hydrochloric Acid Leaching Process of Rare Earth Polishing Powder Waste, columnId=1236276106727321817, journalTitle=Mining and Metallurgical Engineering, columnName=METALLURGY, runingTitle=null, highlight=null, articleAbstract=
A hydrochloric acid leaching process was adopted to recover rare earth from rare earth polishing powder waste. The effects of hydrochloric acid concentration, leaching temperature, leaching time and liquid-solid ratio on the leaching rates of rare earth and main impurity Al2O3 were investigated, and the leaching mechanism was also discussed. It is found that the optimal conditions for single-stage leaching with HCl system are as follows: HCl concentration of 8 mol/L, leaching temperature of 80 ℃, leaching time of 3 h, and liquid-solid ratio of 4∶1. Under such conditions, the leaching rates of rare earth and Al2O3 are 90.81% and 43.68%, respectively.Based on the comparison of results from single-stage leaching, two-stage leaching and three-stage countercurrent leaching, it is shown that the leaching rate of rare earth by three-stage countercurrent leaching can be up to 98.38%. An increased amount of rare earth in the leaching solution is beneficial to the extraction and recovery of rare earth elements in the next step, thus greatly cutting recovery cost.
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采用盐酸直接浸出方式从稀土废抛光粉中回收稀土,考察了盐酸浓度、浸出温度、浸出时间和液固比对稀土和主要杂质元素Al2O3浸出率的影响,并探讨了浸出机理。结果表明,HCl体系单级浸出的优化条件为:HCl浓度8 mol/L、浸出温度80 ℃、浸出时间3 h、液固比4∶1,此时稀土元素浸出率为90.81%,Al2O3浸出率为43.68%。对比了单级浸出、二级浸出和三级逆流浸出效果,证实三级逆流浸出时稀土浸出率高达98.38%,浸出液中稀土总量增加,有利于稀土元素的下一步萃取回收,大大降低了回收成本。
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江名喜(1969-),男,湖南株洲人,博士,高级工程师,主要从事纳米粉体的制备及有色金属废料回收。
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吴希桃(1984—),女,湖南涟源人,硕士,高级工程师,研究方向为稀土资源回收。
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1.Hunan Nonferrous Metals Vocational and Technical College, Zhuzhou 412006, Hunan, China
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1.湖南有色金属职业技术学院,湖南 株洲 412006
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吴希桃(1984—),女,湖南涟源人,硕士,高级工程师,研究方向为稀土资源回收。
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1.Hunan Nonferrous Metals Vocational and Technical College, Zhuzhou 412006, Hunan, China
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1.湖南有色金属职业技术学院,湖南 株洲 412006
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1.Hunan Nonferrous Metals Vocational and Technical College, Zhuzhou 412006, Hunan, China
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1.湖南有色金属职业技术学院,湖南 株洲 412006
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1.Hunan Nonferrous Metals Vocational and Technical College, Zhuzhou 412006, Hunan, China
2.Hunan Province Engineering Technology Research Center for Comprehensive Environmental Management of Mining Area, Changsha 410126, Hunan, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1236327874312073819, tenantId=1146029695717560320, journalId=1235980550691926019, articleId=1236327871682245048, authorId=1236327874110747210, language=CN, stringName=杨庆山, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1.湖南有色金属职业技术学院,湖南 株洲 412006
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