赤泥中氧化钠和氧化铝的回收

120082MultipurposeUtilizationofMineralResourcesNo.1Feb.20081,2,1,1(1.,100080;2.,100049):,:,():;;;:TQ131.1:A:100026532(2008)0120027205,,,,1t0.51.5t[1,2],2005851t,1000t,20%,19573000t,,,(6000),,,[3],1800t,50m,200700m,[4],,,,1,,[5],,K-Na[6],80%,90%[7]1,,25%10%:2007205228:863(2005AA647010):(1970-),,,,20081/%Al2O3SiO2Fe2O3CaONa2OTiO2A/S16.532.76.117.37.629.411.026.73.210.60.057.51.42.76.99.417.122.45.012.835.546.82.43.91.96.80.30.5,,2,,,,,,,2.1[89],,:Na2OAl2O32SiO2nH2O+yCa(OH)2+aq(1-y)Na2OyCaOAl2O32SiO2nH2O+2yNaOH+aq(1)CaO-Al2O3-SiO2-Na2O-H2O,Ca(OH)2,,:(1-y)Na2OyCaOAl2O32SiO2nH2O+(5+x-y)Ca(OH)23CaOAl2O32SiO2nH2O+(2-x)CaOSiO2H2O+2(1-y)NaOH+(4-x)H2O(2),9595%,N/S0.1,,80g/LNa2O,0.5g/LNa2O[10],280300,,K(Na2O/Al2O3),K1214,Na2O1%,A/S0.5,KK,,:Na2OAl2O32SiO2+Ca(OH)2+aqNaCa(HSiO4)+NaAl(OH)4+aq(3)NaCa(HSiO4)+NaOH+aqNa2SiO3+2Ca(OH)2+aq(4)Na2SiO3+Ca(OH)2+H2O+aqCaOSiO2H2O+2NaOH+aq(5),,,,,K=4.0,80%90%,,10%20%,1,,[11],,2.2[12],,,,,1000:Al2O3+Na2CO32NaAlO2+CO2(6)821:SiO2+2CaO2CaOSiO2(7)Na2CO3+Fe2O32NaFeO2+CO2(8),,,,,,[13]3,,--3.1[14],,pH1113,,pH,,,,pH,,,,3.2----[15],,11001h,1550,30min,,SO2,pH5%D2EHPA,10%Na2CO3TiO(OH)2,TiO(OH)21000TiO2pH3,Al2(SO4)318H2O,,(95.68%),,,,3.3,,[1617]PascaleVachon[18](ATCC10108)(ATCC6275)(ATCC32098)(ATCC48705)28,,8d47%,,56%,,,,,3.4,[19]:3CaOAl2O3xSiO2(6-2x)H2O+3Na2CO3+aq3CaCO3+xNa2SiO2(OH)2+2NaAl(OH)4+aq(9)[20],,6CaO6SiO2H2O2CaOSiO20.5H2O,:3CaOAl2O3xSiO2(6-2x)H2O+(3-x)Na2CO3+7x/6H2Ox/6(6CaO6SiO2H2O)+2NaAl(OH)4+(4-2x)NaOH+(3-x)CaCO3(10)3CaOAl2O3xSiO2(6-2x)H2O+Na2CO3922008+H2Ox(2CaOSiO20.5H2O)+NaAl(OH)4+NaOH+(3-2x)CaCO3(11),,,,,,50%4,,,,,,[21],,,,,,,,,,,,,,,,,,,,,:[1]ClaudiaBrunori,CarloCremisini,PaoloMassanisso,etal.Reuseofatreatedredmudbauxitewaste:studiesonenvi2ronmentalcompatibility[J].JournalofHazardousMaterials,B117,2005:5563.[2].[J].,2006,28(1):5355.[3],.[J].,2003(11):4042.[4],.[J].,2002(5):5758.[5],.[J].,1994,15(4):341347.[6].[J].,2005,57(3):115119.[7].[J].,2002(2):3538.[8],,.CaO[J].,2001(6):4043.[9],,.[J].,2003(2):2224.[10],,,.-[J].,2003,23(6):5658.[11],,,.[J].,2006,24():7881.[12],,.[J].,2004(3):1418.[13]Hrishikesan,KizhakkeG.Processforrecoveringsodaandaluminavaluesfromredmud[P].US:4045537,1977.[14].[P].CN:96100220.4,1996.[15]ErolErcag,ResatApak.FurnaceSmeltingandExtractiveMetallurgyofredmud:RecoveryofTiO2,Al2O3andPiglron[J].J.Chem.Technol.Biotechnol.,1997,70:241246.[16],,,.[J].,2005(2):13.[17]DeenanSanthiya,Yen-PengTing.UseofadaptedAsper2gillusnigerinthebioleachingofspentrefineryprocessingcatalyst[J].JournalofBiotechnology,2006,121:6274.[18]PascaleVachon,RajeshwarD.Tyagl,Jean-ChristianAu2clailr,KevinJ.Wilkinson.ChemicalandBiologicalLeac2hingofAluminumfromredMud[J].Environ.Sci.Techn2ol.,1994,28:2630.[19],.[J].,2005(1):1012.[20],,,.[J].,2004,14(3):499503.[21],.[J].,2003(1):4042.RecoveryofSodaandAluminafromRedMudMAShu2hua1,2,ZHENGShi2li1,ZHANGYi1(1.InstituteofProcessEngineering,ChineseAcademyofScience,Beijing,China;2.GraduateUniversityofChineseAcademyofScience,Beijing,China)03120082MultipurposeUtilizationofMineralResourcesNo.1Feb.2008,,(,610059):,,:;;:TB333:A:100026532(2008)0120031204,21[1],,[2],,,,,,[3],,,[4,5],,,Jahn-Teller,1LiMn2O4(LiMn2O4)Fd3m,a=0.8240nm,V=0.5594nm3[6],(O),(Mn),[Mn2O4]Li[7],,Li8a[Mn2]16dO4,8a,16d,32e[8](fcc),:321632(16d),(16c);64,(8a)1/8(1)[9],Abstract:Processesandlatestprogressinrecoveryofsodaandaluminafromredmudemergingasachemicalwasteduringalkalineextractionofaluminafrombauxitearesummarized,CaO2methodandsodiumNa2CO32methodforre2coveryofsodaandacid2soluble2method,biological2method,andnewsodiumcarbonatedecomposition2methodforre2coveryofaluminaareintroducedandtheirprinciplesareanalyzed.ItispointedoutthatCaOmethodwithhigh2pres2sureisverypromisingsincesodaandaluminacanberecoveredsimultaneouslybyusingthismethod,especiallywiththedecreasingofthegradeofbauxite.Keywords:Redmud;Soda;Alumina;CaO2methodwithhigh2pressure:2007206226;:2007207219:(1982-),,