氧化锰矿碳热法固相还原制备锰铁合金

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1、ABSTRACTAbout90％productionofmanganeseinworldareusedinsteelindustry,manganesehaveimportanteffectinsteelespecalilyinimprovingthestrength，toughness，hardnessandquenchingperformance．Manganeseisaddedinsteelbytheformofferromanganeseorferromanganese—siliconalloy．Buttherearesom

2、eprobolemintheproducingmanganesealloylikehighenergyconsumption，longprocess，heavypollutionandsoonTherefore，anewtypeoflowenergyconsumptionandpollution—freemanganeseresourcesutilizationmethodhasbecomethehotspotinresearchInthispaperlowgrademanganeseoxideisusedastheresearch

3、object，thetheoreticalfoundationofthealloyferromanganeseproducingprocessandcontrollingconditionsareresearchedbycarbonthermalreductioninsolidphasecondition，thebestparametersinreductionprocessareobtainedbyresearchingthethermodynamicprocessandthelawofparametersinreductionp

4、rocessThermodynamicsinvestigationwithcarbothermicindicatesthatindirectreductionreactionisthemajorwayforhighvalencemanganeseoxideturningintolowvalencemanganeseoxideThelastreductionstepisMnOturningintoMn，Mn3CorMn7C3at1698K，1666K，1615K，whichmeansMn3CorMn7C3iseasilygenerat

5、edthanMnParametersofcarbothermicinsolidphasereductionprocessshowthat：thecarboninreductionprocessplaytheroleoftheperformanceforthreeaspects：carbonactsasreducingagentthereductionprocess，carbonistheintermediateinsolid—solidreaction，carboncarlpromotemetalphasecondensationB

6、asicitydecidingthegenerationofC2Sandphasechangeintheprocessofcooling，phasechangeisthefoundationofslagandmetalseparation，theminbasicityshouldbenolessthan16forphasechangingThefunctionofadditiveispromotingperformanceinmetalcondensed，reducedtensionbetweenslagandmetalinterf

7、acialAcertainamountofadditivecanincreasedistributionofmanganesebetweenslagandmetalandreducethelossofmetalelementsinslag．Microscopicstructureandcomponentproductsanalysisshowsthat1lIwiththetemperaturerising，FeMm26C¨andFeMn55C4l，changingintoFeMn36C28FeMn46C4，FeMn22Cl2With

8、theriseoftemperaturemanganesecontentinmeltmetalincreasegraduallybecauseofthemanganeseturningfrommanganeseoxideintomel