Designation:D5114/D5114M−90(Reapproved2018)´1StandardTestMethodforLaboratoryFrothFlotationofCoalinaMechanicalCell1ThisstandardisissuedunderthefixeddesignationD5114/D5114M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—ThedesignationwaseditoriallyupdatedtodualandothereditorialchangesweremadethroughoutinMarch2019.INTRODUCTIONFrothflotationofcoal,theseparationofash-bearingmineralsfromcombustiblesviadifferencesinsurfacechemistry,hasbeensteadilyincreasinginuseasameanstotreat600µm(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.1.2Thistestmethoddoesnotcompletelycoverspecificproceduresfortheinvestigationofflota...
