Article(id=1311360806281904961, tenantId=1146029695717560320, journalId=1146123346816638986, issueId=1311360779169919555, articleNumber=null, orderNo=null, doi=10.13426/j.cnki.yky.2025.08.10, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1755792000000, receivedDateStr=2025-08-22, revisedDate=1760889600000, revisedDateStr=2025-10-20, acceptedDate=null, acceptedDateStr=null, onlineDate=1790582380123, onlineDateStr=2026-09-28, pubDate=1779206400000, pubDateStr=2026-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790582380123, onlineIssueDateStr=2026-09-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790582380123, creator=13701087609, updateTime=1790582380123, updator=13701087609, issue=Issue{id=1311360779169919555, tenantId=1146029695717560320, journalId=1146123346816638986, year='2026', volume='45', issue='2', pageStart='1', pageEnd='156', issueExtLink='null', onlineDate='null', pubDate='1779206400000', pubDateStr='2026-05-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1790582373659, creator='13701087609', updateTime=1790583908456, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1311367216646418706, tenantId=1146029695717560320, journalId=1146123346816638986, issueId=1311360779169919555, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1311367216646418707, tenantId=1146029695717560320, journalId=1146123346816638986, issueId=1311360779169919555, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=41, endPage=48, ext={EN=ArticleExt(id=1311360808051901250, articleId=1311360806281904961, tenantId=1146029695717560320, journalId=1146123346816638986, language=EN, title=Column Leaching Experimental Study on Acid-agglomerated of a Low-grade Uranium Ore in Namibia, columnId=1175805041752556213, journalTitle=Uranium Mining and Metallurgy, columnName=Mining and Hydrometallurgy, runingTitle=null, highlight=null, articleAbstract=

This study investigated parameter optimization for heap leaching of a low-grade uranium ore from Namibia deposit through systematic column leaching experiments. Mineralogical composition analysis shows that the uranium ore contains a high proportion of high acid consuming gangue minerals, with tetravalent uranium accounting for 68 %. The main uranium minerals are easily leached uraninite and coffinite. The uranium is enriched of in the fine-grainedportion. After crushing to-8 mm, the mass fraction of fine-grained uranium at -0.425 mm reaches 15.09 %, and its uranium grade is as high as 0.032 %, which leads to the deterioration of direct heap leaching permeability and requires acid-agglomeration pretreatment. Column leaching experiments established the optimal parameter combination : irrigation rate of 20 L/(h·m²), heap height of 9 m, aciddosage for pre-agglomeration of 20 kg/t, binder dosage of 125 g/t, and initial leachate acidity of 100 g/L H₂SO₄. Under optimized conditions, the irrigation duration is shortened to 55 d, and the uranium extraction rate is increased to 80 %. This study has demonstrative significance for the development of similar low-grade, high acid consumption, high fine-grained, and high tetravalent uranium resources.

, authors=Yang LIU¹, Jiewei ZHANG¹, Wensheng TANG¹, Nan HU², Hui ZHANG², Dexin DING², authorsList=Yang LIU, Jiewei ZHANG, Wensheng TANG, Nan HU, Hui ZHANG, Dexin DING, authorCompany=null, correspAuthors=Dexin DING, 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=1311360808458748739, articleId=1311360806281904961, tenantId=1146029695717560320, journalId=1146123346816638986, language=CN, title=纳米比亚某低品位铀矿石拌酸制粒柱浸试验研究, columnId=1175805041991631542, journalTitle=铀矿冶, columnName=开采·选冶, runingTitle=null, highlight=null, articleAbstract=

以纳米比亚某低品位铀矿石为研究对象，通过系统柱浸试验，优化了堆浸工艺参数。矿石特性分析表明：该铀矿石中高耗酸脉石矿物含量高，四价铀占比达68%，主要铀矿物为易浸晶质铀矿与水硅铀矿；细粒级铀富集显著，破碎至-8 mm后，-0.425 mm的细粒级占比达15.09%，其铀品位达0.032%。由于细粒级质量分数高，直接堆浸时渗透性差，须进行拌酸制粒预处理。通过柱浸试验确定了最佳工艺参数：喷淋强度20 L/（h·m²）、堆高9 m、拌酸量20 kg/t、粘结剂125 g/t、浸出剂初始酸质量浓度100 g/L。在此优化条件下，矿石浸出周期缩短至55 d，铀浸出率提升至80%。本研究成果对同类低品位细粒级的铀资源开发具有启示意义。

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