富铅渣的性质及其还原机理

1,2,1,PeterHayes2(11,650051;21,4072):PbO,,900,:;PbO;;:TF812:A:1007-7545(2004)06-0005-04PropertiesandReductionMechanismofLead-richSlagsWANGJi-kun1,ZHAOBao-jun2,YANGGang1,HAYESPeter2(11YunnanMetallurgicalGroup,Kunming650051,China;21PyrometallurgyResearchCentre,UniversityofQueensland,Brisbane,Qld4072,Australia)Abstract:Lead-richslagscontainingdifferentlevelofPbOconcentrationshavebeenpreparedinlaboratory1Porosityanddensity,softeningtemperature,microstructureandphasecompositionsofthelead-richslagshavebeendetermined1Reductionexperimentshavebeenconductedinaverticaltubefurnaceusinggraphitecrucible1Theresultsshowthatnosignificantreactionoccursbetweenlead-richslagandgraphiteattemperaturesbelow9001Thereactionbetweenlead-richslagandgraphiteismainlythroughliquidformed1Thermodynamicofphaseequilibriumofthisslaghasalsobeencalculated1Keywords:Lead-richslags;PbO;Graphite;Smeltingtemperature:(2003GH04):(1943-),,,,,,SO2,,,,,,,,,1111,(%):Pb5()20046©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(%):PbO6510ZnO910SiO2810CaO510Fe2O31310,YM2(%):PbO5510ZnO1116SiO21013CaO614Fe2O31617,YM3(%):PbO4510ZnO1411SiO21216CaO719Fe2O32014,112650,30mm,,400/h,,,,11319mm,Pt/Pt-13%Rh,,,510g,CO/CO2,,CO/CO2,,,X-(EPMA),15kV15nA,EPMA1%()2211,,,EPMA,Pb4SiO6,Pb4SiO6,11Table1TheporosityanddensityoftheslagYM1YM2YM3/%19131215518/(gmL-1)419418415/(gmL-1)6105154181,PbO,YM1YM2YM39001000PbO,(1)1Fig11Thesofteningtemperatureofslaginair212800900100011001200,510g,,22,,,,800,YM1YM26()20046©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,,,;900,900,2Fig13Gasevolutionfordifferentslagsatdifferenttemperatureingraphitecrucible,,33,900,900,,,PbO,,,YM1YM2YM3;1100,3Fig13Gasevolutionfordifferentslagsafterdifferentreactiontimeingraphitecrucible213()Fact2Sage511,,,YM1YM2YM34,PbO125013004Fig14Thecalculatingresultsofliquidratioinslaginair,CO/CO2,PbO,,3,,PbO,YM1YM2YM3ZnOFe2O3CaOSiO2,PbO,7()20046©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:(1),Pb3Ca2Si3O11,;(2),PbO,;(3),YM1YM2YM3,56,PbO,PbO40%70%(),(770800),PbO,;,5PbOFig15Liquid-formationandliquidustemperatureasafunctionofPbOconcentrationinslaginair6PbOFig16Liquid-formationandliquidustemperatureasafunctionofPbOconcentrationinslaginequilibriumwithleadmetal31)PbO2)9001000,PbO3)900,900,4),PbO,5)[1]1[J]1,2001(5):42[2]EJak,BZhao,PCHayes1Proc1ofthe5thIntlSymp1onMetallurgicalSlagsandFluxes[C]1IronandSteelSoci2ety,AIME,Sydney,Australia,1997:719[3],,1[M]1:,2000[4]1QSL[J].,2003(1):50[5]1[J].,2001(8):11[6]1[J]1,2001(2):488()20046©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.