Article(id=1305177725552058946, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1305177706027578094, articleNumber=null, orderNo=null, doi=10.13355/j.cnki.sfyj.2026.04.012, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1776700800000, receivedDateStr=2026-04-21, revisedDate=1779638400000, revisedDateStr=2026-05-25, acceptedDate=null, acceptedDateStr=null, onlineDate=1789108218801, onlineDateStr=2026-09-11, pubDate=1787155200000, pubDateStr=2026-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789108218801, onlineIssueDateStr=2026-09-11, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789108218801, creator=13701087609, updateTime=1789108218801, updator=13701087609, issue=Issue{id=1305177706027578094, tenantId=1146029695717560320, journalId=1146120122248306696, year='2026', volume='45', issue='4', pageStart='455', pageEnd='612', issueExtLink='null', onlineDate='null', pubDate='1787155200000', pubDateStr='2026-08-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1789108214146, creator='13701087609', updateTime=1789108456673, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1305178723335037263, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1305177706027578094, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1305178723335037264, tenantId=1146029695717560320, journalId=1146120122248306696, issueId=1305177706027578094, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=556, endPage=564, ext={EN=ArticleExt(id=1305177725942129219, articleId=1305177725552058946, tenantId=1146029695717560320, journalId=1146120122248306696, language=EN, title=Two-Stage Countercurrent Purification Process for Cadmium Removal from High-Cadmium ZnSO₄ Solution, columnId=1152626641181700664, journalTitle=Hydrometallurgy of China, columnName=Experiment Research, runingTitle=null, highlight=null, articleAbstract=

Lead-zinc ore is the main raw material for zinc hydrometallurgy, and cadmium is one of the major associated metal elements in lead-zinc ore. During the neutral leaching process, cadmium enters the leachate, producing a high-cadmium zinc sulfate solution. Aiming at the common issue in the zinc hydrometallurgy industry of the lengthy process for cadmium separation and recovery via zinc powder cementation, the two-stage countercurrent purification of cadmium from high-cadmium zinc sulfate solution using zinc powder was investigated. The appropriate zinc powder addition rate and residue return enrichment system were explored to increase the cadmium content in the cementation residue. The results show that the suitable zinc powder addition for the first-stage purification is 0.9 times the theoretical amount, and for the second-stage purification, it is 1.2 times the theoretical amount. Under optimal conditions, the cadmium concentration in the solution after the first-stage purification is approximately 70 mg/L, and after the second-stage purification, it is below 5 mg/L. The main phase of the first-stage purification residue is cadmium, with a cadmium mass fraction of 85.11% at the purification endpoint and a zinc mass fraction below 5%. The main phases of the second-stage purification residue are metallic cadmium and zinc. SEM-EDS analysis shows that the particles of the first-stage cementation residue are spherical with an encapsulation phenomenon. The encapsulation layer consists of basic zinc sulfate, while the inner layer is mainly unreacted zinc powder. The findings of this study can provide a technical reference for the separation and recovery of cadmium from high-cadmium leach solutions.

, authors=Houwen ZHANG¹, Yanlin LI¹, Shiyan WU¹, Xingbin LI², Minting LI², Xingguo LUO², Zhigan DENG², Wei GAO², authorsList=Houwen ZHANG, Yanlin LI, Shiyan WU, Xingbin LI, Minting LI, Xingguo LUO, Zhigan DENG, Wei GAO, authorCompany=null, correspAuthors=Xingguo LUO, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1305177726298645060, articleId=1305177725552058946, tenantId=1146029695717560320, journalId=1146120122248306696, language=CN, title=高镉硫酸锌溶液两段逆流净化除镉工艺研究, columnId=1152626641328501305, journalTitle=湿法冶金, columnName=试验研究, runingTitle=null, highlight=null, articleAbstract=

铅锌矿是湿法炼锌的主要原料，镉是铅锌矿中主要的伴生金属元素之一，在中性浸出过程中，镉会进入浸出液生成高镉硫酸锌溶液。针对目前湿法炼锌行业中普遍存在的锌粉置换工艺分离回收镉流程较长这一共性问题，研究了采用锌粉两段逆流净化高镉硫酸锌溶液中的镉，探讨了适宜的锌粉添加量及返渣富集制度，以提高置换渣中镉含量。结果表明：一段净化适宜的锌粉添加量为理论用量的0.9倍，二段净化适宜的锌粉添加量为理论用量的1.2倍；在适宜条件下，一段净化后液中镉质量浓度约70 mg/L，二段净化后液中镉质量浓度低于5 mg/L；一段净化渣主要物相为镉，净化终点镉质量分数为85.11%，锌质量分数低于5%；二段净化渣主要物相为金属镉和锌；SEM-EDS分析表明，一段置换渣的颗粒呈球状，存在包裹现象，包裹层为碱式硫酸锌，内层主要为未反应的锌粉。研究结果可为高镉浸出液中镉分离回收提供技术参考。

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张候文（1976—），男，本科，高级工程师，主要研究方向为湿法炼锌。

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张候文（1976—），男，本科，高级工程师，主要研究方向为湿法炼锌。

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