混聯(lián)法高濃度溶出及鋁酸鈉粗液脫硅過程研究.pdf

1、東北大學(xué)碩士學(xué)位論文混聯(lián)法高濃度溶出及鋁酸鈉粗液脫硅過程研究姓名：姜小凱申請學(xué)位級別：碩士專業(yè)：有色金屬冶金指導(dǎo)教師：畢詩文2001.8.1查!!查蘭堡主堡塞。塑里——StudyonHighConcentrationDigestioninMixanddesilicideofNaAl04LiquorAbstractAluminumplaysagreatroleinsocietywiththedevelopmentofnationaleco

2、nomic，andtheneedforaluminumisincreasingrecentlyTherefore，developingtheindustryofaluminum，especiallyaluminahasthepriorityinourcountryBauxitejsthemostimportantmaterialtoproducealuminawhilethebauxiteinourcountrybelongstodia

3、sporeandthecontentofsilicaiSgreatSOthatthemostsuitablemethodiscombinationorsinterNOWwehaveformedSuccessfulprocedureof10WconcentrationdigestafterlongperiodexploreHowevertheOUtputofaluminainourcountryisinadequatesince1980s

4、andweneedtoimportagreatnumberofaluminaeachyearInordertomeetthedomesticneedofaluminaitiSnecessarytaisetheyieldsofaluminaplantsundertheconditionthatnotincreaseequipmentUsinghigllconcentrationdigestioniSthemostemcientmethod

5、toincreaseliquoryieldandunitpowerofaluminaplantButwehavenoexperiencesaboutitSOitiSessentialtostudytheleachingprocedureofsinterandtofindtheoptimumdigestingconditionathJighaluminaconcentrationThepurposeofthispaperistesolve

6、thisproblemandgetenoughdataasthebasisofoperationinplantEffectofsomeparameters，suchastheratioofliquidtosolid(US)，temperatureandtimeonthedigestingratioofalumina，sodiumandonthesedimentpropenyofredmudathighaluminaconcentrati

7、on(A1203：1401609／1)isresearchedinthispaperAsaresultwefoundthattheoptimumdigestingconditionathi幽concentrationis：Temperature：80“C；Time：30minL／S：25Concentrationofsodiumcarbonate：309／lFurthermoretheinfluenceofkindsofseed，cha