碱酸湿法制备高纯石墨工艺研究.pdfVIP免费

doi:１０􀆰３９６９∕j􀆰issn􀆰１００７Ｇ７５４５􀆰２０２４􀆰０３􀆰０１３收稿日期:２０２３Ｇ１１Ｇ１３基金项目:国家重点研发计划项目(２０２１YFC２９０２９０２)作者简介:刘巍(１９８０Ｇ),男,硕士,高级工程师碱酸湿法制备高纯石墨工艺研究刘巍１,范艳青１,王玲２(１􀆰矿冶科技集团有限公司,北京１００１６０;２􀆰北京科技大学冶金与生态工程学院,北京１０００８３)摘要:针对高纯石墨制备,提出碱酸湿法制备工艺.考察了加压碱浸和盐酸浸出除杂时各因素对制备高纯石墨的影响.结果表明,在碱浸温度２２０℃、碱浓度２７０g∕L、液固比８、时间２h、搅拌转速５００r∕min,铝的脱除率为８８􀆰１８％,硅的脱除率为８９􀆰６９％.在常压酸浸温度８０℃、酸浓度１２％、时间４h、液固比４的条件下,高纯石墨产品固定碳含量大于９９􀆰８９％.进行２００目标准筛筛分处理后,筛上物灰分含量０􀆰０９２％、固定碳含量９９􀆰９１％、水分０􀆰１５％,符合鳞片石墨GB∕T３５１８—２００８中高纯石墨LC(Ｇ)７５Ｇ９９􀆰９产品牌号的技术要求.关键词:高纯石墨;加压碱浸;酸浸;筛分中图分类号:TF８０３􀆰２＋５文献标志码:A文章编号:１００７Ｇ７５４５(２０２４)０３Ｇ００９６Ｇ０７StudyonthePreparationofHighPurityGraphitebyAlkaliＧAcidWetMethodLIUWei１,FANYanqing１,WANGLing２(１􀆰BGRIMMTechnologyGroup,Beijing１００１６０,China;２􀆰SchoolofMetallurgicalandEcologicalEngineering,UniversityofScienceandTechnologyBeijing,Beijing１０００８３,China)Abstract:AwetalkaliＧacidpreparationprocesswasproposedforpreparationofhighＧpuritygraphite􀆰TheeffectsofvariousfactorsonthepreparationofhighＧpuritygraphiteduringpressurealkalineleachingandhydrochloricacidleachingforimpurityremovalwereinvestigated􀆰Theresultsshowthatremovalrateofaluminumandsiliconis８８􀆰１８％and８９􀆰６９％respectivelyundertheconditionsincludingalkalineleachingtemperatureof２２０℃,alkaliconcentrationof２７０g∕L,L∕Sof８,timeof２h,andstirringspeedof５００r∕min􀆰ThefixedcarboncontentofhighＧpuritygraphiteproductsis９９􀆰８９％aboveundertheatmosphericacidleachingconditionsincludingtemperatureof８０℃,acidconcentrationof１２％,timeof４h,andL∕Sof４􀆰Aftersievingthrougha２００meshsieve,theresiduesonthesieveshowan...