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Aiming at the problem of low separation accuracy when recovering copper and aluminum particles from lithium iron phosphate batteries by wind specific gravity separation method, heavy liquid separation was conducted on three samples: the copper-aluminum mixture obtained after crushing and screening of battery cells from a factory's battery crushing and sorting system, as well as the copper product and aluminum product obtained from air gravity separation. The results show that at a heavy liquid density of 2.95 g/cm³ and a solid-liquid ratio of 0.35 g/mL, the aluminum recovery rates of the copper-aluminum mixture vary with particle size. For particles >0.630 mm, the Al and Cu recovery rates reach 96.99% and 99.72%, respectively; for particles of 0.630-0.104 mm, the corresponding values are 97.62% and 90.02%. The recovery rates of aluminum and copper are 96.44% and 99.83%, respectively. The aluminum recovery rate of particles greater than 0.630 mm reaches 99.66%, and the copper recovery rate reaches 98.52%. The aluminum recovery rate for particles in the 0.630-0.125 mm size range reaches 90.60%, and the copper recovery rate reaches 96.46%. Copper and aluminum can be obtained from raw materials via heavy liquid separation, and separated from raw materials using the same method. The research results provide a basis for the subsequent separation of black powder and metal particles.

, authors=Jilong WU¹, Zili HUANG¹, Xiao XIAO², Shuo XIAO², authorsList=Jilong WU, Zili HUANG, Xiao XIAO, Shuo XIAO, authorCompany=null, correspAuthors=Zili HUANG, 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=1322559946181428102, articleId=1322559944818279300, tenantId=1146029695717560320, journalId=1225396423026438145, language=CN, title=重液分选在废旧磷酸铁锂电池回收处理中铜铝颗粒分离的应用研究, columnId=1226462297560892399, journalTitle=矿业研究与开发, columnName=选矿与资源综合利用, runingTitle=null, highlight=null, articleAbstract=

针对采用风力比重分选方法回收磷酸铁锂电池中铜、铝颗粒时分选精度不高的问题，对来自某工厂电池破碎分选系统的电芯破碎筛分后的铜铝混合物、风力比重分选后的铜粒产品、铝粒产品分别进行重液分选。试验结果表明，当重液密度为2.95 g/cm³，固液比为0.35 g/mL时，粒径大于0.630 mm的铜铝混合物的Al回收率达到96.99%，Cu回收率达到99.72%；粒径为0.630~0.104 mm的铜铝混合物的Al回收率达到97.62%，Cu回收率达到90.02%；铜粒产品的Al回收率达到96.44%，Cu回收率达到99.83%；粒径大于0.630 mm的铝粒产品其Al回收率达到99.66%，Cu回收率达到98.52%，粒径为0.630~0.125 mm的铝粒产品的Al回收率达到90.60%，Cu回收率达到96.46%。大粒径的原料经重液分选可得到铜和铝，小粒径的原料经重液分选可将铜、铝分开。研究结果为后序黑粉和金属颗粒的分选提供了基础。

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吴纪龙（2000—），男，重庆合川人，硕士研究生，主要从事二次资源综合利用研究。E-mail: wujilong2830601115@163.com

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吴纪龙（2000—），男，重庆合川人，硕士研究生，主要从事二次资源综合利用研究。E-mail: wujilong2830601115@163.com

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