Article(id=1236333408524235548, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236333405122646435, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2023.01.013, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1660579200000, receivedDateStr=2022-08-16, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772694454555, onlineDateStr=2026-03-05, pubDate=1675180800000, pubDateStr=2023-02-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772694454555, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772694454555, creator=13701087609, updateTime=1772694454555, updator=13701087609, issue=Issue{id=1236333405122646435, tenantId=1146029695717560320, journalId=1235980550691926019, year='2023', volume='43', issue='1', pageStart='1', pageEnd='159', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772694453745, creator=13701087609, updateTime=1772694772892, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236334743785099547, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236333405122646435, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236334743785099548, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236333405122646435, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=59, endPage=62, ext={EN=ArticleExt(id=1236333409203712832, articleId=1236333408524235548, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=Pre-discarding by Heavy Medium Separation Plus Ambient Temperature Flotation for Scheelite Sample from Middle-Layer Mining Zone of a Tungsten Mine in Hunan Province, columnId=1236276106932842717, journalTitle=Mining and Metallurgical Engineering, columnName=MINERAL PROCESSING, runingTitle=null, highlight=null, articleAbstract=

A process consisting of pre-discarding with heavy medium separation and ambient-temperature flotation was adopted for a scheelite ore sampled from the middle-layer mining zone of a tungsten mine in Hunan Province. A heavy medium separation test with the ore size of -15+0.5 mm as the feeding show that in the heavy medium with the density of 2.37 g/cm³, 31.37% of yielded tailings can be discarded, while the obtained heavy product has WO₃ grade and recovery increased to 0.34% and 96.62% respectively. A test by using a process of desulfurization flotation plus ambient temperature flotation for scheelite demonstrates that the process of pre-discarding with heavy medium has little effect on the operation loss rate of WO₃ in sulfur-containing products. However, the raw ore is directly taken into the flotation without a pre-discarding will lead to more tungsten minerals left in the middlings. The closed-circuit test shows that after a pre-discarding by heavy medium separation, the tungsten concentrate from ambient-temperature flotation has its WO₃ grade and recovery reaching 5.50% and 84.15% respectively. It is concluded that pre-discarding by using heavy medium cyclone is conducive to improvement of tungsten product index and comprehensive utilization of tailings.

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对湖南某钨矿山中部采集样开展了重介质预抛及白钨常温浮选试验研究。重介质预抛试验结果表明，以-15+0.5 mm粒级作为预抛给矿，在重介质密度2.37 g/cm³条件下，可获得抛尾产率31.37%，沉砂WO₃品位、回收率分别为0.34%、96.62%的良好指标；脱硫浮选-白钨常温浮选试验结果表明，重介质预抛对WO₃在含硫产品中的作业损失率影响不大；但不预抛、原矿直接入磨浮选会导致更多的钨矿物存在于中矿产品中。闭路试验结果表明，经重介质预抛后，常温浮选钨精矿WO₃品位、回收率分别为5.50%、84.15%。中部采集样采用重介质旋流器预抛不但有利于改善钨产品质量指标，还有助于尾矿的综合利用。

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袁代军（1974—），男，湖南娄底人，高级工程师，主要从事钨资源综合回收研究工作。

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袁代军（1974—），男，湖南娄底人，高级工程师，主要从事钨资源综合回收研究工作。

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