添加劑強(qiáng)化二段法鋁酸鈉溶液分解的研究.pdf

1、分類號——密級學(xué)位論文添加劑強(qiáng)化二段法鋁酸鈉溶液分解的研究作者姓名指導(dǎo)教師：申請學(xué)位級別：學(xué)科專業(yè)名稱：論文提交日期：學(xué)位授予日期：評閱人：陳玉國陳鋒副教授東北大學(xué)理學(xué)院碩士學(xué)科類別：工學(xué)應(yīng)用化學(xué)2005J210論文答辯日期：c州，多答辯委員會(huì)主席胡建設(shè)劉曉智東北大學(xué)2005年12月2006113徐淑坤東北大學(xué)碩士學(xué)位論文ABSTRACTEffectofAdditivesonSandyAluminaProducedbyTwo—Stage

2、SeedPrecipitationAbstractInthedemandofenvironmentprotectionandenergysaving，sandyaluminahasbecomethefavoriterawmaterialofelectrolyzedaluminumplantTheprocedureofsodiumaluminateliquorprecipitationisthecriticalfactortodecide

3、thequalityofalumina，Two—stageprecipitationisaneffectivewaytoenhanceseedprecipitation，improveparticlesizeandstrengthofproductTheAI(OH)3producedinottrcountrynowadayshascoarseparticlesizebuthaspoorstrength，Toimprovetheparti

4、clesizeandstrengthofproductisthemaininvestigationofthispaperItwasreportedthatdopingadditivesproperlywhichwaseasilyexertedandCOSTSless，couldhelptoproducecoarsealuminaandincreaseprecipitationratioefficientlyandthishasbeena

5、cceptedpopularly，Inordertoguidetheproductionofaluminainourcountryit’Sessentialtoexplorethemechanismofprecipitationanddevelopnewadditiveswhichsuittothealuminaindustryinourcountl“yTheapplicationofsufactanttotwoStageprecipi

6、tationisoneoftheinnovationsofthisthesisTheinfluenceofadditivesA，H，GIetconprecipitationratio，particlesizeandstrengthofAI(OH)3werestudiedatfavorabletechniqueconditions，Theresultsshowthatadditiveincreasesparticlesizeandinte

7、nsityofproduct，improvesprecipitationrateofsodiumaluminatesolutionThemechanismofprecipitationprocessenhancedbyaddingsurfactantwasstudiededbySEMphotograghsandinvirtueofparticlesizeanalysisandmathematicalmethodItshowsthatco