Article(id=1236319270355923965, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236316193171239730, articleNumber=null, orderNo=null, doi=10.3969/j.issn.0253-6099.2023.03.021, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1669392000000, receivedDateStr=2022-11-26, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1772691083754, onlineDateStr=2026-03-05, pubDate=1685548800000, pubDateStr=2023-06-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1772691083754, onlineIssueDateStr=2026-03-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1772691083754, creator=13701087609, updateTime=1772691083754, updator=13701087609, issue=Issue{id=1236316193171239730, tenantId=1146029695717560320, journalId=1235980550691926019, year='2023', volume='43', issue='3', pageStart='1', pageEnd='179', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1772690350096, creator=13701087609, updateTime=1772691872061, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1236322576809652696, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236316193171239730, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1236322576809652697, tenantId=1146029695717560320, journalId=1235980550691926019, issueId=1236316193171239730, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=93, endPage=96, ext={EN=ArticleExt(id=1236319270611775499, articleId=1236319270355923965, tenantId=1146029695717560320, journalId=1235980550691926019, language=EN, title=High Pressure Grinding Roll Combined with Staged-Grinding and Staged-Separation Technology for Amphibolite-Type Magnetite in Yuanjiacun Iron Mine, columnId=1236276106932842717, journalTitle=Mining and Metallurgical Engineering, columnName=MINERAL PROCESSING, runingTitle=null, highlight=null, articleAbstract=

The amphibolite-type magnetite ore in Yuanjiacun Iron Mine was processed adopting a processing technique consisting of high pressure grinding roll (HPGR) plus pre-concentration, followed by staged grinding and staged separation process. In order to reduce the grinding feed in the following concentration, HPGR was introduced for superfine crushing, and the obtained material in a size fraction of－3 mm was treated by a wet pre-concentration process, yielding 22% coarse tailings for discarding. And then a pre-concentration process resulted in the obtained concentrate with TFe grade up to around 36%. The work index for grinding before and after adopting HPGR was reduced from 11.91 kW·h/t to 11.11 kW·h/t. An experiment was performed with a flowsheet of HPGR plus pre-concentration followed by staged grinding and staged separation process, yielding 33.92% concentrate grading 67.13% TFe at 75.75% recovery, showing the ratio of concentration down to 2.27 from 2.95. It is concluded that the above-mentioned processing technique can provide an energy-conservation and consumption-reduction solution for large-scale and low-cost exploitation of similar low-grade magnetite mines.

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对太钢袁家村铁矿闪石型磁铁矿进行了高压辊磨-预选及阶磨阶选工艺技术研究。为了降低入磨矿石选比，采用高压辊磨进行超细碎并对-3 mm粒级物料进行湿式预选，可以抛出产率22%的粗粒尾矿，预选精矿TFe品位提高到36%左右。高压辊磨前后矿样的磨矿功指数分别为11.91 kW·h/t和11.11 kW·h/t。高压辊磨-预选-阶磨阶选流程试验获得了精矿产率33.92%、TFe品位67.13%、回收率75.75%的指标，选比由2.95下降至2.27。高压辊磨-预选-阶磨阶选工艺为此类低品位磁铁矿大规模低成本开采提供了节能降耗新思路。

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李贤（1975—），男，吉林梨树人，高级工程师，主要从事矿山技术及管理工作。

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李贤（1975—），男，吉林梨树人，高级工程师，主要从事矿山技术及管理工作。

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