还原—锈蚀法提取红土镍矿中镍钴的工艺-.研究

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

2、orlateriteoncorrosionprocess，andthecorrosionbehaviorofreductive—IateritearestudiedThethermodynamicanalysisofthetreatmentonreductive—lateriteusingcorrosionmethodwereinvestigated，theresultsshowthat，the11ickelandcobarcanbetransferredintoNi”andCo“whiletheironcanbetransferredintoFeOOHbycontrolling

3、thepotentialandpHofthesolutionThelateritewereprocessedbythechloridesegregationmethodanddirectreductionmethod，respectivelyTheresultsshowthatafterheatingfor90minunder1000℃usingchloridesegregationmethod，themetallizationratioofFe．NiandCointhereductive—lateriteare844％．96％and933％．respectivelyAftert

4、hetreatmentonthereductive—lateritebycorrosionprocess，theleachingefficiencyofFe，NiandCoare88％，92．3％and83l％．respectivelyafterheatingfor60minunder1100'C，mixedwith6％coke．themetallizationratioofFe．NiandCointhereductive—lateriteare758％．893％and873％．respectivelyAfterthetreatmentonthereductive—laterit

5、ebycorrosionprocess，theleachingefficiencyofFe，NiandCoare6．9％，864％and686％，respectivelyThecorrosionbehaviorofreductive-lateritewasstudied，takingthelateriteprocessedbychloridizingsegregationprocessasrawmaterialsTheresultsshowthat：(1)Undertheconditionsofacidtooreratio010，gasflowrate5×103Lmin1m一，l

6、eachingtemperature80'C，leachingtime8h，stirringspeed300rmin～，liquidtosolidratio10，leachingefficiencyofFe，NiandCoare99％．909％and802％．respectively(2)ThekineticsanalysisoftheleachingbehaviorofnickelshowsthattheleachingleactionofnickelwascontrolledbytheinterfacialchemicalreactionAndtheactivationene

7、rgyis3101kJmol～中南大学硕士学位论文(3)ThepureoxygencallenhancerustingactionUnderthecaseofinlettingthepureoxygen，theleachingefficiencyofFe，NiandCoarerespectively99％，952％and863％whentherustingactionlastsfor4hAndtheleachingbehaviorofnickelwillstopafterther