摘要
Themainuseforspentcoffeegrounds(SCG)producedinthesolublecoffeeindustryisthermalenergygenerationintheindustryitself.TheSCGareprocessedusingoperationsthatarestronglydependentonpowderflowbehavior.Inthisstudy,weevaluatedtwoclassicalflowabilityindicesofnon-consolidatedSCGpowders:theangleofrepose(AoR),andtheHausnerratio(HR).Theinfluencesofthemeanparticlediameter,particlesizedistribution(PSD),andwatercontentontheAoRandHRvaluesofSCGwereanalyzedforpowderswithameanparticlesizerangeof225-550μm.Forpowderswithameanparticlesizecloseto350μmandformixturescontainingmorethan40%fineparticles,theHR(>1.35)andAoR(>45°)valueswerecharacteristicofpoorflowability.TheAoRwassensitivetothepowderPSD,andpowderswithsimilarmeanparticlesizeshadhigherAoRvalueswhenthePSDwaslarger.Forpowdersw让hwatercontentsupto50%,theflowabilityindiceswerenotgreatlyaffectedbythewatercontent.Amodifiedlinear-mixturepackingmodelwasusedtopredictthepackedbedvoidfractionsforbinaryandternarymixturesofthethreebasepowders.ThemodelwasusedtoconstructaternarydiagramtoestimatetheHRvaluesofthemixtures.AnequationwasfittedtocorrelateHRandAoR.TheproposeddiagramandtheequationprovideinsightintoflowbehaviorandcouldbeusedforprocessdesignofindustrialplantsthathandleSCG.
出版日期
2019年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
