搅拌磨超细粉碎工艺的研究

SeriesNo.274April1999METALMINE27419994,,,,410083,,,1000882,,,,,410083(),,1m,,,;,,;Charles,StudyontheSuperfineComminutionbyAgitatingGrindingMillYangHuamingWangDianzuoQiuGuanzhou(CentralSouthUniversityofTechnology)AbstractTheeffectofthetechnologicalflowsheetofthesuperfinecomminutionbyagitatinggrindingmillandthegrindingaidonthesuperfinecomminutionresultsarepresentedandthebehaviourcharacteristicsofthesuperfinecomminutionbyagitationgrindingarediscussed.Thestudyhasshownthatagitationgrindingmillcanproduceasuperfinetalcpowderwithanaverageparticlesizelessthan1mandhasadvantagesofsim2pletechnology,highefficiencyandnonpullutedproduct.Thegrindingaidfunctionsmailythroughitsadsorptionwithtalcpowderwhichcanreducethepulpviscosityandraisethedispersivityofthegrindingprocess.Theex2perimenthasprovedthatthesuperfinecomminutionprocessofintermittentagitationgrindingmillcoincideswithCharleslawandamodelforthesuperfinecomminutionbyagitationgrindingmillhasbeenestablished.KeywordsAgitatinggrindingmill,Comminution,Grindingaid,,,,3MgO4SiO2H2O,2m,,114.8L,2.2kW,180mm,,;3700r/min,35mm(2.50g/cm3)5mm(6.31g/cm3),100%-325,16.5m,8915%,2.74g/cm3,53©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()SiO261.91%,MgO31.30%,CaO1.04%,Fe2O30.15%2kg,11;2;3;4;5;6;7;8;9;10;11;12;13;14ZBD,SKC22000,Zetaplus2ZetaPotentialAnalyser2,(),1162(1),,21,,55%,2h1m(0.95m)21,120min;290min;360min;430min,,Re:Re=ND2/,(1):Re;N;D;(1),,,,,(2)3,,,,,,,,,4,2h,1m,4355%,1,120min;2,60min(3)4,,3mm5mm,;,,,(4),-200-325-500,5-200,3h,6327419994©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(5),,,,66,,2h,,60%,011%,2h1m,660%,,41;23,:a1;b1,,RehbinderKlimpel,,,,(1),,,7,,,;,,,,,(2)273:19994©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=7.70.1(3)(NaPO3)6(Hexametaphosphate),,[PO3]-66,,20100PO-3::,,,,;,,(4)Griffith,=(4Y/L)1/2,(2):;Y;;L,,,,,,(9),,,,,,,9,,,,,4Rittinger8327419994©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1)1947Epstein(),[13],1965Reid,[4]:y(x,t)=1-1-y(x,0)exp-s(x)t,0FxFxmax,(3):y(x,t)tx;y(x,0)x;s(x)()(2)1995Tuzun,[5],,:s(xi)=axi,(4)bij=(xi-1/xj),(5):a;;bij,xjxi-1(4)(3),y(x,t)=1-1-y(x,0)exp(-axt),0FxFxmax.(6)k=(1/at)1/,(6)y(x,t)=1-1-y(x,0)exp-(x/k),0FxFxmax.(7),Rosin2Rammler2Bennett,k,Rosin2Rammler,(8):k={1/at+(1/k0)}1/,(8):k0k:at=1k-1ko.(9)Et,,(9):E=A(1d-1do),(10):E,kWh/t;d,d0,m(10)Charles,CharlesEd,E=569.1(d-0.378-d-0.3780).(11),d0=16.5m,(11):E=569.1d-0.378-19712.(12)10,,93:19994©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1)1m,,,55%,,4,2h-3250.95m,8915%9215%,-1m(2),(3),,,,(4)Charles,,,1HeimAetal.Determinationofparametersforwet2grindingmodelinperlmill.PowderTechnol,1985,41:1731792,11,1991,19(1):64683AustinLG.Areviewintroductiontothemathematicalde2scriptionofgrindingasarateprocess.PowderTechnol,1972(5):1174ReidKJ.Asolutiontothebatchgrindingequation.ChemEngSci,1965,20:9539635TuzunMA,etal.Effectofpintipvelocity,balldensityandballsizeongrindingkineticsinastirredballmill.IntJMinerProcess,1995,43:179191(1998208218)(24),91,3h1,15(TFe)9193%,(TFe)20101%,(TFe)8185%,,,,,92,3h1,102(TFe)12132%31195%9184%,,,,,,,;,,,,91550(TFe)12138%31130%10148%,91725,6,(TFe)10131%28184%9171%2199619981199852710714t,22614958t9123%,11140%2117,1213t,3542(1999201208)0427419994©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.