还原—锈蚀法提取红土镍矿中镍钴的工艺分析

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1、中南大学硕士学位论文ABSTRACTThethesisdemonstratesasimplewaytoprocesstheoverseaslateriteviareduction—corrosionmethod，whichcanremovetheironwhenextractingthenickelandcobaltinthelaterite，resultingintheseparationofNiandCofromFeInthistext，theprincipleofthecorrosionmethod，th

2、eeffectofthepre—reductiontreatmentforlateriteoncorrosionprocess，andthecorrosionbehaviorofreductive—IateritearestudiedThethermodynamicanalysisofthetreatmentonreductive—lateriteusingcorrosionmethodwereinvestigated，theresultsshowthat，the11ickelandcobarcanbetran

3、sferredintoNi”andCo“whiletheironcanbetransferredintoFeOOHbycontrollingthepotentialandpHofthesolutionThelateritewereprocessedbythechloridesegregationmethodanddirectreductionmethod，respectivelyTheresultsshowthatafterheatingfor90minunder1000℃usingchloridesegreg

4、ationmethod，themetallizationratioofFe．NiandCointhereductive—lateriteare844％．96％and933％．respectivelyAfterthetreatmentonthereductive—lateritebycorrosionprocess，theleachingefficiencyofFe，NiandCoare88％，92．3％and83l％．respectivelyafterheatingfor60minunder1100'C，mix

5、edwith6％coke．themetallizationratioofFe．NiandCointhereductive—lateriteare758％．893％and873％．respectivelyAfterthetreatmentonthereductive—lateritebycorrosionprocess，theleachingefficiencyofFe，NiandCoare6．9％，864％and686％，respectivelyThecorrosionbehaviorofreductive-l

6、ateritewasstudied，takingthelateriteprocessedbychloridizingsegregationprocessasrawmaterialsTheresultsshowthat：(1)Undertheconditionsofacidtooreratio010，gasflowrate5×103Lmin1m一，leachingtemperature80'C，leachingtime8h，stirringspeed300rmin～，liquidtosolidratio10，le

7、achingefficiencyofFe，NiandCoare99％．909％and802％．respectively(2)ThekineticsanalysisoftheleachingbehaviorofnickelshowsthattheleachingleactionofnickelwascontrolledbytheinterfacialchemicalreactionAndtheactivationenergyis3101kJmol～中南大学硕士学位论文(3)Thepureoxygencallenh

8、ancerustingactionUnderthecaseofinlettingthepureoxygen，theleachingefficiencyofFe，NiandCoarerespectively99％，952％and863％whentherustingactionlastsfor4hAndtheleachingbehaviorofnickelwillstopafterther