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1、攀枝花學(xué)院本科畢業(yè)論文堿溶粉煤灰提取硅工藝條件的優(yōu)化學(xué)生姓名：學(xué)生學(xué)號(hào)：1院（系）：攀枝花學(xué)院生化系年級(jí)專業(yè)：08級(jí)環(huán)境工程指導(dǎo)教師：二〇一二年五月攀枝花學(xué)院本科畢業(yè)設(shè)計(jì)（論文）摘要摘要本文主要以攀枝花的粉煤灰為基本材料,參照堿溶粉煤灰提取硅工藝條件優(yōu)化，提出堿溶粉煤灰提取二氧化硅工藝，并通過控制各條件達(dá)到二氧化硅提取條件的優(yōu)化。通過單因素實(shí)驗(yàn)對(duì)粉煤灰粒度，NaOH初始濃度、液固比、堿溶時(shí)間、反應(yīng)溫度各因素對(duì)粉煤灰提取的影響，又通過正交試驗(yàn)考察制備條件NaOH初始濃度、液固比、堿溶時(shí)間、反應(yīng)溫度各因素對(duì)氧化硅提取的影響，并確定最優(yōu)條件組確定最優(yōu)方案,并確定影響硅提取率各因素的強(qiáng)弱。結(jié)
2、果表明：通過單因素實(shí)驗(yàn)，單因素實(shí)驗(yàn)結(jié)果表明，粉煤灰的粒度對(duì)SiO2溶出率影響很大。但粒度達(dá)到200目以上時(shí)，溶出率變化不大。以研磨后200目粉煤灰在堿濃度為17mol/l、液固比1.5:1、反應(yīng)溫度為130℃、反應(yīng)時(shí)間為6min，可使攀枝花粉煤灰的二氧化硅的溶出率達(dá)到最高，并確定影響硅的提取率各因素的強(qiáng)弱順序?yàn)椋悍磻?yīng)溫度>NaOH初始濃度>固液比>反應(yīng)時(shí)間。用此法處理粉煤灰提取硅，具有節(jié)能降耗的優(yōu)點(diǎn)，為粉煤灰的開發(fā)與利用開辟了一條新途徑。關(guān)鍵詞粉煤灰，二氧化硅，堿溶法i攀枝花學(xué)院本科畢業(yè)設(shè)計(jì)（論文）ABSTRACTABSTRACTThispapermainlytoPanzhihuaf
3、lyashasbasicmaterial,withreferencetoaluminumflyashtechnologyprinciple,putflyashinalkalinesolutionextractionsilicaprocess,andbycontrollingtheconditionstoachievesilicaextractionconditionoptimization.throughthesinglefactorexperimentonflyashparticlesize,initialNaOHconcentration,liquidsolidratio,rea
4、ctiontemperature,alkalidissolutiontimeofeachfactoronflyasheffectofextraction,wasinvestigatedthroughorthogonaltestconditionsforpreparationofinitialNaOHconcentration,liquidsolidratio,reactiontemperature,alkalidissolutiontimeofeachfactoronsiliconoxideextractioneffects,anddeterminationoftheoptimalc
5、onditionsfordeterminingtheoptimalsolutionset.Andthestudyofleachingprocessanddynamicsexperiment.Theresultsshowedthat:throughthesinglefactorexperiment,singlefactorexperimentresultsshowthat,theparticlesizeofflyashonSiO2dissolutionrateinfluence.Butsizeuptomorethan200eyes,thedissolutionrateofchange.
6、In200eyesaftergrindingflyashinalkalineconcentrationis17mol/L,liquidsolidratioof1.8:1and130degreesC,reaction6min,canmakethesilicadissolutionratereachedthehighest.Andtodeterminetheeffectofsiliconextractionrateofeachfactorstrengthorder:reactiontemperature>NaOHinitialconcentrationratioofsolidtoliqu
7、id>reactiontime>.Methodfortreatmentofflyashfromsilicon,hastheadvantageofenergysaving,thedevelopmentandutilizationofflyashhasopenedupanewwayKeywordsflyash,silica,alkalinedissolutionmethodii攀枝花學(xué)院本科畢業(yè)設(shè)計(jì)（論文）目錄目錄摘要IABSTRACTII1緒論11.1粉煤灰
