Designation:D5114−90(Reapproved2010)StandardTestMethodforLaboratoryFrothFlotationofCoalinaMechanicalCell1ThisstandardisissuedunderthefixeddesignationD5114;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONFrothflotationofcoal,theseparationofash-bearingmineralsfromcombustiblesviadifferencesinsurfacechemistry,hasbeensteadilyincreasinginuseasameanstotreat600-µm(No.30U.S.A.StandardSieveSeries)orfinercoal.Theprocessisoneinwhichmanyvariablesneedtobemonitoredandregulated.Becauseofthiscomplexity,rigorouslaboratorytestingisdifficulttostandardize.Thistestmethodoutlinesthetypesofequipmentandprocedurestoapplyonalaboratoryscaletoisolatekeyprocessvariablesandminimizethevariationsassociatedwiththedesignandexecutionofafrothflotationtest.Theobjectiveofthetestmethodistodevelopameansbywhichrepeatablegrade/recoveryresultsareascertainedfromfrothflotationtestingofcoalwithoutimposingunnecessarylimitationsontheapplicabilityofthetestresultsincoalpreparationpractice.Itisrecognizedthatsamplepreparation,particularlycomminution,hasasignificantimpactonfrothflotationresponse.Thistestmethoddoesnotattempttodefinesamplepreparationandsizereductionpracticesaspartofafrothflotationtestingprogram.Thistestmethodalsodoesnotcompletelycoverspecificproceduresfortheinvestigationofflotationkinetics.Suchatestisspecializedandishighlydependentupontheenduseofthedata.1.Scope1.1Thistestmethodcoversalaboratoryprocedureforconductingasinglefrothflotationtestonfinecoal(thatis,nominaltopsizeof600µm(No.30U.S.A.StandardSieveSeries)orfiner)usingadefinedsetofstartingpointconditionsfortheoperatingvariables.1.2Thistestmethoddoesnotcompletelycoverspecificproceduresfortheinvestigationofflotationkinetics.Suchatestisspecializedandhighlydependentupontheobjectiveofthedata.1.3Sinceoptimumconditionsforflotationareu...
