Article(id=1322560010396217834, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322559951067792299, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1747584000000, receivedDateStr=2025-05-19, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1793252478455, onlineDateStr=2026-10-29, pubDate=1777046400000, pubDateStr=2026-04-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793252478455, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793252478455, creator=13701087609, updateTime=1793252478455, updator=13701087609, issue=Issue{id=1322559951067792299, tenantId=1146029695717560320, journalId=1225396423026438145, year='2026', volume='46', issue='4', pageStart='1', pageEnd='294', issueExtLink='null', onlineDate='null', pubDate='1777046400000', pubDateStr='2026-04-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793252464310, creator='13701087609', updateTime=1793252763065, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322561204200001631, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322559951067792299, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322561204200001632, tenantId=1146029695717560320, journalId=1225396423026438145, issueId=1322559951067792299, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=204, endPage=213, ext={EN=ArticleExt(id=1322560010786288107, articleId=1322560010396217834, tenantId=1146029695717560320, journalId=1225396423026438145, language=EN, title=Research on the Collision Characteristics of Grinding Balls in a Vertical Stirred Mill Based on DEM-CFD, columnId=null, journalTitle=Mining Research and Development, columnName=null, runingTitle=null, highlight=null, articleAbstract=

To investigate the collision characteristics of grinding balls inside the cylinder of a vertical stirred mill during operation, a laboratory-scale vertical stirred mill was used as the research subject. Based on the Discrete Element Method (DEM) and Computational Fluid Dynamics (CFD), a DEM-CFD simulation model was developed, taking grinding balls, slurry, and the agitator as the objects. The collision characteristics of grinding balls and their variation along the axial direction were systematically investigated based on five aspects, including the number of collisions, normal and tangential collision energies, and normal and tangential collision forces. The results show that collisions among grinding balls account for 90.5% of the total number of collisions, which is significantly higher than the number of collisions between grinding balls and the grinding cylinder. The tangential collision energy among grinding balls is approximately 1.4 times that of the normal collision energy, while the normal collision force is approximately 6.2 times that of the tangential collision force, indicating that the grinding effect of the grinding balls is more pronounced in the tangential direction. Grinding balls located between the bottom and the 3/8 mark of the cylinder exhibit collision characteristics marked by high collision frequency, high collision energy, and low collision force, which effectively refine the materials. The grinding effect in other areas is relatively small, suitable for rapid materials grading and allowing materials that meet the particle size conditions to overflow from the cylinder. This research achievement provides theoretical guidance for optimizing mill design and improving grinding efficiency.

, authors=Xianzhou SONG^{1, 2}, Chunyang HAN^{1, 2}, Minghao WANG^{1, 2}, Haonan JI³, Zhaohua WANG³, authorsList=Xianzhou SONG, Chunyang HAN, Minghao WANG, Haonan JI, Zhaohua WANG, authorCompany=null, correspAuthors=Zhaohua WANG, 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=1322560011193135596, articleId=1322560010396217834, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=基于DEM-CFD的立式搅拌磨机研磨球碰撞特性研究, columnId=1226462295946085268, journalTitle=矿业研究与开发, columnName=矿山机电与矿业智能化, runingTitle=null, highlight=null, articleAbstract=

为探究立式搅拌磨机筒体内部运行过程中研磨球的碰撞特性，以试验级立式搅拌磨机为研究对象，基于离散元方法（Discrete Element Method, DEM）与计算流体力学（Computational Fluid Dynamics, CFD），以研磨球、矿浆、搅拌器为研究对象，建立了离散元流固耦合（DEM-CFD）仿真模型。从碰撞次数、法向和切向碰撞能、法向和切向碰撞力5个方面系统研究了研磨球的碰撞特性及其沿轴向方向的变化规律。结果表明：研磨球间的碰撞次数占总碰撞次数的90.5%，远高于研磨球与筒体间的碰撞次数；研磨球间的切向碰撞能约为法向碰撞能的1.4倍，法向碰撞力约为切向碰撞力的6.2倍，说明研磨球在切向方向的研磨作用更显著；位于筒体底部至3/8筒体高度处的研磨球存在高碰撞次数、高碰撞能、低碰撞力的碰撞特性，能够有效细化物料；其他区域的研磨作用相对较小，适合快速物料分级并使符合粒度条件的物料溢流出筒体。研究成果可为优化磨机结构、提高磨矿效率提供理论指导。

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宋现洲（1981—），男，河南浚县人，硕士，高级工程师，主要从事矿山粉磨装备研发。E-mail:songxz@citic-hic.com.cn

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宋现洲（1981—），男，河南浚县人，硕士，高级工程师，主要从事矿山粉磨装备研发。E-mail:songxz@citic-hic.com.cn

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