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时间:2020-03-25
《废铅酸蓄电池胶泥的低温熔盐还原固硫熔炼工艺研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第32卷第2期矿冶工程V01.32№22012年04月MININGANDMETALLURGICALENGINEERINGApril2012废铅酸蓄电池胶泥的低温熔盐还原固硫熔炼工艺研究①黄潮,唐朝波,唐谟堂,杨建广,陈永明,杨声海,何静(中南大学冶金科学与工程学院,湖南长沙410083)摘要:提出了一种废铅酸蓄电池胶泥低温熔盐还原固硫熔炼新工艺,该工艺以次氧化锌作固硫剂,焦粉为还原剂,在800~900的工业纯碱熔体中还原熔炼废铅酸蓄电池胶泥,实现了再生铅的低温、低碳、清洁冶炼。在理论分析的基础上,研究了工艺条件对熔炼过程的影响。结果表明,在纯碱质量为固态物的2.835倍、固硫
2、剂为理论量的1.1倍、还原剂为胶泥的16%、熔炼温度为880℃的最优条件下,获得很好的冶炼指标:铅的直收率和总回收率分别为96.64%和98.06%,氧化锌固硫率为94.70%。新工艺具有低温、低碳、低耗、高效、清洁和过程简单等优点,对废铅酸蓄电池胶泥及铅烟尘等再生铅原料的清洁冶炼和原生铅(锑、铋)的清洁冶金均具有重要意义。关键词:废铅酸蓄电池;铅;再生铅;低温熔盐冶金;清洁冶金中图分类号:TF803文献标识码:A文章编号:0253—6099(2012)02—0084—04Sulfur—fixingReductionSmeltingofSpentLead·acidBatter
3、yColloidSludgeinFusedSaltatLowTemperatureHUANGChao,TANGChao—bo,TANGMo—tang,YANGJian-guang,CHENYong—ming,YANGSheng-hai,HEJing(SchoolofMetallurgicalScienceandEngineering,CentralSouthUniversity,Changsha410083,Hunan,China)Abstract:Anewprocessforsulfur·fixingreductionsmeltingofspentlead—acidbatt
4、erycolloidsludgeinfusedsaltatlowtemperaturehavebeenproposed.Intheprocess,usingcrudezincoxideassulfur—fixingagentandcokepowdersasreducingagent,spentlead—acidbatterycolloidsludgecanbereducedintocrudeleadinthemoltensaltofsodiumcarbonateat800—900oC,realizingthelow—temperaturecleansmeltingofthes
5、econdaryleadwithlittledischargeofcarbondioxide.Onthebasisofthermodynamicanalysis,theeffectsoftechnologicalfactorsonthesmeltingwereinvestigated.Theresultsindi—catethatexcellentindexessuchasdirectandtotalrecoveryofleadbeing96.64%and98.O6%respectivelyandsulfur·fixingrateof94.70%forzincoxidecan
6、beobtainedundertheoptimumconditionsasfollows:theamountofsodiumcarbonateis2.835timesofthesolidswei【ght,thedosageofzincoxideis1.1timesofthetheoreticalvalue,thedosageofcokepowdersis16%ofcolloidsludge.andthesmeltingtemperatureis880℃.Theprocesshasmanyadvantagessuchaslowersmeltingtemperature,litt
7、ledischargeofcarbondioxide,lowcost,higheficiency,environmentfriendlinessandsimpleoperation.Thisprocessisofmuchsignificancetothecleansmeltingoftherawmaterialsforsecondaryleadsuchasspentlead·acidbatterycolloidsludgeandleaddustsaswellasthecleanmetallurgyofp
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