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1.
Vacuum distillation refining of crude lithium ( Ⅱ)——Kinetics on vacuum distillation of crude lithium
1 INTRODUCTIONLithiumiswidelyusedinthefieldsofaerospace ,atomicenergy ,metallurgy ,chemicalengineering ,electronics ,glassandceramics 相似文献
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Bioleaching of refractory gold ore ( Ⅱ )——Mechanism on bioleaching of arsenopyrite by Thiobacillus ferrooxidans 总被引:1,自引:2,他引:1
1 INTRODUCTIONBioleachingprocesseshavebeenusedextensivelytorecoverbasemetals (mainlycopper)anduraniumfromlow gradeoresandmorerecen 相似文献
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1 INTRODUCTIONTiAlalloyhaslongbeenconsideredasapromis ingmaterialforhightemperatureapplication ,duetoitsexcellenthightemperature p 相似文献
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1 INTRODUCTIONModeⅡ (shear)fractureisoneoftypicalfailurepatternsinrockengineering .Ithasattractedanin creasingattentioninrecentyears ,throughboththeo reticalstudyoffracturecriterion[1~ 4 ] andlaboratorytestingoffracturetoughness[5~ 8] .Althoughanum beroftestingm… 相似文献
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Thermodynamics of Zn(Ⅱ)-NH_3-NH_4Cl-H_2O system 总被引:19,自引:5,他引:14
1 INTRODUCTIONAmmoniazincmetallurgyhasthemeritsofeasypurificationandsimplifiedprocess ,soithasbeenre searchedextensively .Wehavestudiedupthethermo dynamicsinthesystemsofZn(Ⅱ ) NH3 (NH ) 2 SO4 H2 O[1] andZn(Ⅱ ) NH3 (NH) 2 CO3 H2 O[2 ] anddis coveredtherulesofzincsolubility … 相似文献
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1 INTRODUCTIONThestudyofmoltenstructureofCaO SiO2 ,whichactasthebasicfactorinfluencingthephysicalandchemicalpropertiesofthesilicat 相似文献
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J.L.Wang Y.W.Chung 《中国有色金属学会会刊》2002,12(4):649-652
1 INTRODUCTIONItiswellacceptedthatmoisture inducedembrit tlementisthemajorcauseofthelowductilityandin tergranularfailureofNi3Aland 相似文献
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1 INTRODUCTIONThecorrosionofachromatezincattheinitialstageisthedecreasing processofsurfacelightness ,andisusuallycalledmelanization (black patina)ofzincplateofwhichtheproductisZn1 δOwiththepropertyofann typesemi conductor ,andtheillumi nationsuppressestheme… 相似文献
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1 INTRODUCTIONTheimportantbacteriainbiohydrometallurgyaremainlyaerobicchemolithotrophicspecies ,ofwhichthemoreimportantareThiobacillusferrooxi dansandThiobacillusthiooxidans .ThepropertiesofthetwospeciesareshowninTable 1.Theycatalyzetheoxidationofsomeora… 相似文献
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Behavior of Fe and S in bioleaching of pentlandite 总被引:4,自引:1,他引:4
1 INTRODUCTIONOxidizingprocessbyautotrophicbacteria ,suchasThiobacillusferrooxidans (Hereinbelowbeabbre viatedtoT .f .) ,hasbeenwidely 相似文献
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1 INTRODUCTIONThecontinuouscastingwithsoft contactedmouldisanewlydevelopingtechnologyforsteelandotherheavymetals[1~ 3] .Itcanimprovethesurfacequalityandincreasetheequiaxedcrystalregioninbil letefficiently ,soitwaspaidgreatattentionsintheworld[4 ,5] .Nowexperim… 相似文献
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LIAO Ji qiao 《中国有色金属学会会刊》2000,10(3)
1 INTRODUCTIONHydrogenreductionoftungstenoxides,subsequentmixingwithcarbonblackandcarburatingisthemostcommonwaytoproducetungstencarbidepowdersforthehardmetalindustry.Thistechniquehasbeenpracticedfordecadesandcalled“conventionalhydrogenreductionprocess… 相似文献
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1 INTRODUCTIONThereliabilitydesignoptimizationofmachinecomponentisbasedonthefoundationofneotericmathematicalprobability ,mathematicalstatisticsandoptimization .Itusuallydealswithhighdimensional,nonconvexandnonlinearobjectfunctionssubjecttovariousstochas… 相似文献
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1 INTRODUCTIONNewmaterials ,suchasdispersionstrengthenedalloy ,amorphousandintermetallics ,canbeobtainedbymechanicalalloyingwhichsh 相似文献
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Microstructure and properties of composite of stainless steel and partially stabilized zirconia 总被引:1,自引:0,他引:1
1 INTRODUCTIONOwingtotherequirementsofrepeatedserviceandlongworkingtimeofhightemperatureburners ,suchasspacecraftengine ,thematerialoftheburnersshouldhavegoodstructureprocessability ,aswellashightemperatureresistance ,thermalshockresistanceandthermalfati… 相似文献
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1 INTRODUCTIONAnorderoflargeplatecastingsusuallybafflesthemanufactures,asthedeflectiondeformationisliabletooccurduringsolidificationofthecastings .Thecommonwaytosolvethisproblemistopursueanoptimumcastingprocessroutebytrialanderrormethod ,ortokeeplargerm… 相似文献
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1 INTRODUCTIONTheobligatechemoautotrophicbacteriawhichisnamedThiobacillusferrooxidans,istheprimaryor ganismimplicatedinthebioleachingofseveralsul fides .Itscommercialpotentialintherecoveryofmet alfromlow gradeandrefractoryores ,desulfurizationofcoals ,andi… 相似文献
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1 INTRODUCTIONHeterogeneousphoto catalysisshowsgreatpotentialforapplicationsingaseousoraqueousorganiccontami nantsdecontamination 相似文献
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1 INTRODUCTIONWiththedevelopmentofmodernscienceandtechnology ,thestructureandpropertiesofsolidstatehavebeendeeplyunderstood .Howev 相似文献
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Influence of heat treatment on tribological behaviors of novel wrought aluminum bronze 总被引:4,自引:1,他引:4
1 INTRODUCTIONAluminumbronzepossessesexcellentphysical,mechanicalandtribologicalproperties .Itisavailableformakingwear resistingan 相似文献