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1、+ModelCOLSUA-14169;No.ofPages9ARTICLEINPRESSColloidsandSurfacesA:Physicochem.Eng.Aspectsxxx(2006)xxx–xxxStudyofsuspensionsettling:AapproachtodeterminesuspensionclassificationandparticleinteractionsR.Viea,N.Azemaa,∗,J.C.Quantina,E.Touraudb,M.FouletieraaCentredesMat´
2、eriauxdeGrandeDiffusion,EcoledesMinesdAl`es,6AvenuedeClavi`eres,30319Al`esC´edex,FrancebLaboratoireduG´eniedelEnvironnementIndustriel,EcoledesMinesdAl`es,6AvenuedeClavi`eres,30319Al`esC´edex,FranceReceived18April2006;receivedinrevisedform28September2006;accepted26
3、October2006AbstractThepropertiesofmineralsuspensionsdonotevolvelinearlywithparticlemassfraction.Forsomecriticalconcentrationsthesepropertiesareabruptlymodifiedduetoachangeofrelativeinterparticleinteractionforceprevalence.Usingkaolinandglassbeadsasmodelmaterials,phy
4、sico-chemicalstabilityandrheologicalmeasurementhavebeencarriedoutinordertoproposeaglobalanddiscriminantparameterenablingthenatureofparticleinteractionstobeidentified.Differenttypesofsuspensionswerestudiednamely:dilutedsuspensions,concentratedsuspensionsandsolidsusp
5、ensions.Physico-chemicalstability,studiedbyopticaldispersionanalysis(TurbiscanMA2000)enablestheclarificationratetobemeasuredandtoproposeanewglobalparameter,the“phaseseparationindex”.Inaddition,rheologicalanalysiswasrealizedbythemeansofviscousflowmeasurement.Behaviou
6、rofsolidsuspensionsissatisfactorilydescribedbyOswalddeWaelepowerlawinthewholerangeofconcentrationstudiedwhichtendstodemonstratethattheinteractionsremainsthesameinthisrange.©2006ElsevierB.V.Allrightsreserved.Keywords:Particleinteractions;Classification;Suspension;Ka
7、olin;Settling;Characterisation1.Introductionvidually[3].Inaconcentratedsuspension,particlessettleasamoreorlessconsolidatedmasswithasharpboundarybetweenPastesandsuspensionsarewidelyusedinindustrialarea,settlingsuspensionandsupernatant.Thesuspensionbehaviourrecyclin
8、gandwasteprocessing.Stabilityandmechanicalprop-correspondstoaregimeknownashinderedsettling(alsocalledertieswhichmainlydependonparticlesize,particleshape
