應用高純磁鐵精礦粉制備優(yōu)質(zhì)鐵粉.pdf

1、東北大學碩士學位論文應用高純磁鐵精礦粉制備優(yōu)質(zhì)鐵粉姓名：曹春杰申請學位級別：碩士專業(yè)：材料學指導教師：何鳳鳴茹紅強20070201東北大學碩士學位論文AbsmlctHighQualityIronPowderProducedByHighPurityoflronConcentratePowderAbstractAsimportantlawmaterialforPMpieces，ironpowderwasoneofthemostamountu

2、sed70％～80％ofmountwasusedinPMindustrySotheproductionconditionandcapacityvarietyqualityandcostofironpowderhadimportantinfluencetothedevelopmentofPMindustryIndomestic，millscalewasseveraschiefmaterialforironpowderproductionb

3、utitsamountusedforreducedironpowderbecomelessandlessHenceironpowderproducedbyironconcentratepowderinauguralsauniquepathforthedomesticproductionofredueedironpowderinthisp帆theproductionofreducedironpowderbymagnetiteconcent

4、ratedpowderwasstudiedsystematicallyinexperimenttheprep瞰面onofironconcentratepowderseparationofraworeandIncreaseofirongradew豳studiedWiththebaseofobtainingqualifiedironconcentratepowdermadethepreparationofironpowderforPMusi

5、ngtwo—stepreductionExperimentalresultsindicate：theseparationofraworeadoptedtheprocessflowofmillinggrindingmagneticdressingandcationicfeve瑚flotationWiththeconditionsofthegritsizewas325meshthattheproportionwas97％，thereagen

6、tofreverseflotationwaslaurylamineandthereagentuselevelwas160比thetemperatureofreveTseflotationwas25℃～30℃theconcentrationofextraonreagentwas20％andthereagentuselevelwas80k#t，theconcentrationoforepulpwas60％，thetimewas25minut

7、es，achievedthehighqualityironconcel3tratopowderbyTFe715％，Si0202％Thetwostepreductionprocess：solidcarbonreduction；theproportionofcokeandcalcinedlimewas3：1；thereducedtemperaturewas1150“(2，thethicknessofrawmaterialwas485mman

8、dthereducedtimewas27hThegritsizewascontrolledby1501anr11“resultreachedTFe975％andSi0206％throughmagneticdressing／／2atmospherew骶usedforsecondaryreduction；thereducedtemperaturewas900℃thethicknessoflawmaterialwas30mmthereduce

9、dgaswas75％H225％N2andthereducedtimewas2hTheprocessgetstheironpowderof一100and200meshthroughthetwostagebreakingonetimeafterreductiontheapparentdensityreachrespectively2649／cm3and268咖，andtheflowtimereachrespectively275sand28

10、5sThecompositionsofironpowderreachedTFe993％，C0007％，MnO062％，SO003％，PO009％，Si0024％，AICO3％throaghnmgneticdressingTheresultwasbetterthanGB／T41361994ofreducedironpowderForthefurtherstudiesonperformanceofironpowdersurveythecom