Article(id=1311351130991460955, tenantId=1146029695717560320, journalId=1146123346816638986, issueId=1311351083973305284, articleNumber=null, orderNo=null, doi=10.13426/j.cnki.yky.2025.04.15, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1745337600000, receivedDateStr=2025-04-23, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1790580073353, onlineDateStr=2026-09-28, pubDate=1763568000000, pubDateStr=2025-11-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790580073353, onlineIssueDateStr=2026-09-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790580073353, creator=13701087609, updateTime=1790580073353, updator=13701087609, issue=Issue{id=1311351083973305284, tenantId=1146029695717560320, journalId=1146123346816638986, year='2025', volume='44', issue='4', pageStart='1', pageEnd='158', issueExtLink='null', onlineDate='null', pubDate='1763568000000', pubDateStr='2025-11-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1790580062144, creator='13701087609', updateTime=1790583973598, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1311367489863381299, tenantId=1146029695717560320, journalId=1146123346816638986, issueId=1311351083973305284, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1311367489863381300, tenantId=1146029695717560320, journalId=1146123346816638986, issueId=1311351083973305284, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=51, endPage=57, ext={EN=ArticleExt(id=1311351131327005276, articleId=1311351130991460955, tenantId=1146029695717560320, journalId=1146123346816638986, language=EN, title=Corrosion of Calcite under Different CO₂ Partial Pressures, columnId=1175805041752556213, journalTitle=Uranium Mining and Metallurgy, columnName=MINING AND HYDROMETALLURGY, runingTitle=null, highlight=null, articleAbstract=

Calcite is an important carbonate mineral in sandstone-type uranium deposits, and its corrosion-precipitation behavior directly affects the permeability of the deposits. To gain a deeper understanding of the mechanisms behind permeability decline during "CO₂+O₂" in-situ leaching of sandstone-type uranium deposits, the stirred leaching experiments using calcite in a high-pressure reactor under varying CO₂ partial pressures was conducted. The results indicate that higher CO₂ partial pressures lead to lower solution pH and higher concentrations, significantly enhancing calcite corrosion. However, the Ca²⁺released during corrosion can trigger secondary calcite precipitation. Differential corrosion was observed on the calcite surface, forming distinct corrosion pits. Additionally, the pore structure of calcite underwent notable changes, characterized by the disappearance of micropores, a reduction in pore volume, and an increase in average pore size. Based on the above findings, a dynamic control strategy of "high-pressure unclogging followed by low-pressure maintenance" was proposed for in-situ leaching operations, providing both theoretical foundation and engineering guidance for optimizing the "CO₂+O₂" in-situ uranium leaching process.

, authors=Yufan XIE, Hui ZHANG, Feng LI, Tianze ZENG, Qian CAO, Dexin DING, authorsList=Yufan XIE, Hui ZHANG, Feng LI, Tianze ZENG, Qian CAO, 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=1311351131910013537, articleId=1311351130991460955, tenantId=1146029695717560320, journalId=1146123346816638986, language=CN, title=不同分压CO₂对方解石的溶蚀作用, columnId=1175805041991631542, journalTitle=铀矿冶, columnName=开采·选冶, runingTitle=null, highlight=null, articleAbstract=

方解石是砂岩型铀矿床中重要的碳酸盐矿物，其溶解-沉淀行为直接影响矿床的渗透性。为了深入理解砂岩型铀矿床“CO₂+O₂”地浸采铀过程中渗透性下降机制，采用不同分压CO₂对方解石开展高压反应釜搅拌浸出研究。结果表明：ＣＯ２分压越高，溶液的ｐＨ 越低、浓度越高，对方解石的溶蚀作用越显著，但溶蚀过程中产生的Ca²⁺会导致次生方解石沉淀的产生；方解石表面出现了差异性溶蚀，产生了明显的溶蚀坑；方解石的孔隙结构发生了明显改变，表现为微孔消失、孔隙减少以及平均孔径变大。基于上述发现，针对地浸现场提出了“高压疏通-低压维持”的动态调控策略，为优化“CO₂+O₂”地浸采铀工艺提供了理论依据和工程指导。

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谢宇帆（1999—），男，湖南益阳人，在读硕士，主要研究方向为地浸采铀理论与技术。

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谢宇帆（1999—），男，湖南益阳人，在读硕士，主要研究方向为地浸采铀理论与技术。

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