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选矿学专业英语 5.pptx


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选矿学专业英语 5.pptx
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Outline钒及钒化合物Introduction:Concepts,Methods,TermsandDevelopmentPropertiesofmineral:Physical,minution:Crushing,Grinding,ScreeningandClassificationPhysicalMethods:Gravityconcentration,icandelectricalseparation,FrothflotationChemicalMethods:PyrometallurgyandHydrometallurgyProductionHandling:icandelectricalseparation5.icseparation5.icseparator5.4Electricalseparation5.icseparationChapter55.5Practiceofelectricalseparation5.icpropertiesbetweentheoremineralsandusedtoseparateeithervaluablemineralsfromnon-icgangue,e.g.itefromquartz,ontaminantsorothervalua-blemineralsfromthenon-icvalues.Anexampleofthisisthetin-bearingmineralcassiterite,iteorwolfra-icseparators.5.icseparationhasbeenforalmost200yearsintheconcentrationofironores,andisstillusedextensivelytoday.Awidevarietyofdeviceshavebeenused.Sincethestartofthiscenturytherehasbeenasteadyexpansioninboththeequ-icseparationisapplica-ble.Theremovalofsmallamountsofironandiron-bearingmineralsfromindu-eanimportantapplication,ashastheconcentrationofvariousferrousandnonferrousminerals.5.icfield,althou-ghwithmostsubstancestheeffectistooslighttobedetected.Materialscanbec-lassifiedintotwobroadgroups,accordingtowhethertheyareattractedorrepe-:ically,.5.ism,involvingveryhighforces.icmaterialshaveveryhighsusceptibilitytomagn-ismwhenremovedfromthefield(remanenc-e).Theycanbeconcentratedinlow-icseparatorsandtheprinc-ite(Fe3O4),althoughhematite(Fe2O3)andsiderite(FeCO3)iteandhencegivegoodseparation.Theremovalof"tramp"ironfromorescanalsoberegardedasaformoflow-intensitymagnegticseparation.5.icinduction(B)(thenumberoflinesofforcepassingthroughaunitareaofmaterial)isthetesla(T).isingforcewhichinducesthelinesofforcethroughamaterialiscalledthefieldintensity(H),andbyconventionhastheunitsamperepermetre(1Am-1=4π×10-7T).ization(MA/m)izationinducedinthematerial,and:icpermeabilityofmediuminvacuum,4π×10-7Tm/A5.icsusceptibility(S)ization.Forpara-icmaterials,Sisasmallpositiveconstant,icmaterials.icfield,essaturated.5.toliftaparticularmineralisdependentnotonlyontheval 内容来自淘豆网www.taodocs.com转载请标明出处.