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1、第25卷第4期礦冶Vo1.25.NO.42016年8月MINING&METALLURGYAugust2016文章編號(hào):1005-7854(2016)04—0036—05富銦鋅鐵渣中鋅和銦的浸出與鐵的同步還原朱北平鄧志敢張帆魏昶李存兄(1.云南華聯(lián)鋅銦股份有限公司,云南文山663701;2.昆明理工大學(xué)冶金與能源工程學(xué)院,昆明650093)摘要:我國鋅資源儲(chǔ)量豐富,含鋅礦物中很大一部分以高鐵閃鋅礦的形式存在,并且其中含有豐富的銦資源。為了綜合回收高鐵閃鋅礦濕法煉鋅過程富集于中浸渣中的有價(jià)金屬,開展了中浸渣和鋅精礦的還原酸浸試驗(yàn)研究,其主要目的是利用硫酸浸
2、出中性浸出渣中以鐵酸鹽形式殘留的鋅和銦,同時(shí)利用鋅精礦將溶液中的三價(jià)鐵還原為二價(jià)鐵,實(shí)現(xiàn)鋅精礦中鋅、銦的同步浸出。研究了鋅中浸渣和鋅精礦的投料質(zhì)量比、浸出劑濃度、液固比、反應(yīng)溫度、浸出時(shí)間對(duì)鋅、銦浸出行為的影響。研究表明在初始硫酸濃度220g/L,中浸渣與鋅精礦質(zhì)量比1:0.25,粒度一74m,液固比6,溫度9oqC,反應(yīng)時(shí)間3h的條件下,鋅、銦的浸出率在96%以上,浸出液中95%以上的鐵被還原為二價(jià)鐵離子,實(shí)現(xiàn)了浸出與還原的同步進(jìn)行。關(guān)鍵詞:鐵閃鋅礦;浸出渣;還原;浸出;鋅和銦中圖分類號(hào):TF813;TF8431文獻(xiàn)標(biāo)志碼:Adoi:10.3969/
3、j.issn.1005-7854.2016.04.009REDUCINGFERRICANDLEACHINGOFZINCANDINDIUMFROMRESIDUEBEARINGINDIUM—ZINC.FERRICZHUBei-ping。DENGZhi.ganZHANGFanWEIChangLICun.xiong(1.YunnanHualianZincandIndiumCo.Ltd.,Wenshan663701,Yunnan,China;2.FacultyofMetallurgicalandEnergyEngineering,KunmingUniversit
4、yofScienceandTechnology,Kunming650093,China)ABSTRACT:ChinaiSrichinzincresource,mostofwhichexistinformsofmarmatitebearingindium.Inordertorecoverthevaluablemetalsneutralleachingresiduesfromtheprocessofzinchydrometallurgy,thetestworkofre-ductionacidleachingonneutralresiduemixedwith
5、zincconcentratewithhigh—ironsphaleriteastheresearchobjecthasbeentakeninthepaper.Theprimaryobjectivesaretoleachthezincandindiumremainingintheneutralleachresidueasferrite,usingacid,andtoreducetheferricironinsolutiontotheflerrousstatebyreactionwithzinccon-centrate,therebyextracting
6、thezincandindiumfromthezincconcentrate.Theinfluencingfactorssuchasmassra-fj0ofneutralresiduetozincconcentrate,initialconcentrationofsulfuricacid,reactiontime,liquid-solidratio,andtemperatureonleachingeficiencyofzincandindiumhavebeenstudiedindetailandfinallythebesttechnicalpa—ram
7、etersobtained:massratioofneutralresiduetozincconcentrate1:0.25,materialparticlesizesmallerthan74p,m,initialconcentrationofsulfuricacid220g/L,reactiontime3h,liquid—solidratio6,temperature90℃.Theresultsshowedthattheleachingeficiencyofzincandindiumwereover96%,besides,nearly95%Fewas
8、Feintheleachingsolutionthatwassuitableforsubseq