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To achieve the effective recovery of iron resources from solid waste, a combined recovery process of reverse flotation, magnetizing roasting, and magnetic separation was proposed, taking a low-grade iron tailings resource in Jingzhou, Hubei as the research object, to efficiently separate the weakly magnetic iron resources in the tailings. Mineralogical analysis indicates that the iron grade of the raw ore is 18.72%, and the ore mainly consists of weakly magnetic hematite and limonite, featuring a fine dissemination size and a high gangue content. Reverse flotation pretreatment was adopted to remove aluminosilicate gangue, thereby reducing the processing volume and energy consumption of subsequent processes. The reverse flotation process parameters were optimized through experiments. Under the conditions of a grinding fineness of 75%, a pulp pH of 9, a soluble starch dosage of 1 500 g/t, and a dodecyl amine dosage of 400 g/t, the iron recovery of reverse flotation roughing reaches 83.07%. After one cleaning stage, the total iron grade of the concentrate increases to 43.60%. Through single-factor experiments, the optimal parameters for magnetizing roasting and magnetic separation are determined as follows: a roasting temperature of 650 ℃, a roasting time of 30 min, a pulverized coal dosage of 6%, and a magnetic induction intensity of 180 mT. This process achieves the directional transformation of weakly magnetic hematite and limonite into strongly magnetic magnetite. After roasting, the magnetic iron grade increases from 0.20% to 43.12%, and the iron grade of hematite and limonite decreases from 38.16% to 1.02%. This combined process realizes the efficient recovery and enrichment of iron resources from the tailings, which provides a technical reference for the resource utilization of tailings.

, authors=Qin Hu¹, Cong Zheng¹, Chong Ma¹, Ping Gong², authorsList=Qin Hu, Cong Zheng, Chong Ma, Ping Gong, authorCompany=null, correspAuthors=Ping Gong, 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=1321895047973425724, articleId=1321895047533023802, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=湖北某低品位铁尾矿资源的回收工艺研究, columnId=1226462297560892399, journalTitle=矿业研究与开发, columnName=选矿与资源综合利用, runingTitle=null, highlight=null, articleAbstract=

为实现固体废弃物中铁资源的有效回收，以湖北荆州某低品位铁尾矿铁资源为研究对象，提出反浮选-磁化焙烧-磁选联合回收工艺，高效分离尾矿中弱磁性铁资源。矿物学分析表明，原矿铁品位为18.72%，以弱磁性赤（褐）铁矿为主，嵌布粒度细、脉石含量高。采用反浮选预处理脱除硅铝酸盐脉石，缩减后续工序处理量与能耗，通过试验优化反浮选工艺参数，在磨矿细度75%、矿浆pH=9、可溶性淀粉用量1 500 g/t、十二胺用量400 g/t的条件下，反浮选粗选铁回收率达83.07%，经一次精选后精矿总铁品位提升至43.60%。通过单因素试验确定磁化焙烧-磁选最优参数：焙烧温度650 ℃、焙烧时间30 min、煤粉用量6%、磁感应强度180 mT。该工艺可实现弱磁性赤（褐）铁矿向强磁性磁铁矿定向转化，焙烧后磁性铁品位由0.20%升至43.12%，赤（褐）铁矿铁品位由38.16%降至1.02%。该联合工艺能够实现尾矿中铁资源的高效回收与富集，为尾矿资源化利用提供了技术参考。

, authors=胡勤¹, 郑聪¹, 马冲¹, 龚平², authorsList=胡勤, 郑聪, 马冲, 龚平, authorCompany=null, correspAuthors=龚平, authorNote=, correspAuthorsNote=, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=tQ5F0VMgn4WtPq1sVDCvvA==, magXml=X/S36FH8Ul5HhJob+1mHdw==, pdfUrl=null, pdf=MRARZWSM7q7im0cpa3x6Vw==, pdfFileSize=2512401, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=ozpZ7/qHto/JoiEsYBTBHg==, mapNumber=null, fund=null)}, authors=[Author(id=1321895048602571332, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1321895047533023802, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=630470029@qq.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1321895048732594758, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1321895047533023802, authorId=1321895048602571332, language=EN, stringName=Qin Hu, firstName=Qin, middleName=null, lastName=Hu, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1.Yangtze University College of Arts and Sciences, Jingzhou, Hubei 434020, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1321895048904561223, tenantId=1146029695717560320, journalId=1225396423026438145, articleId=1321895047533023802, authorId=1321895048602571332, language=CN, stringName=胡勤, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=¹, address=^1．长江大学文理学院，湖北 荆州市　434020, bio={"content":"

胡勤（1983—），女，湖北荆州人，硕士，副教授，主要从事建筑矿山节能与环保、结构加固与检测方面的研究。E-mail:630470029@qq.com

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胡勤（1983—），女，湖北荆州人，硕士，副教授，主要从事建筑矿山节能与环保、结构加固与检测方面的研究。E-mail:630470029@qq.com

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