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ID:36643640
大小:1.58 MB
页数:57页
时间:2019-05-13
《赤泥沉降高效絮凝剂的合成与应用》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、东北大学硕士学位论文赤泥沉降高效絮凝剂的合成与应用姓名:王耀武申请学位级别:硕士专业:有色金属冶金指导教师:毕诗文20060201东北大学硕士学位论文摘要关键词:丙烯酰胺聚丙烯酰胺氧肟酸絮凝剂赤泥沉降东北大学硕士学位论文AbstractSynthesisandApplicationofAMoreEffectiveFlocculantinRedMudSettlementAbstractIntheprocessofmakingalumina,redmudsettlementandseparationareanimportantsegment.
2、Afteraluminaisdissolved,aluminaenterintoleachingliquorasaformofsodiumaluminate.Thesolutionisdilutedbywater,thenseparatedredmudfromsodiumaluminatesolutionbysettlementprocess.Thensodiumaluminatesolutiondecomposetoaluminumhydroxide.Itisbakedtoaluminafinally.Inthesettlementpr
3、ocess.iftheredmudsettlementonlydependsonitsgravity,thesettlementspeedisslowandproductivityislow.Forthisreason,factoryalwaysuseftocculantstospeedupthesettlement.Thespeedoftheredmudsettlementandfloatoftopliquidisimportanttothefactoryproductivity,thecostandqualityofalumina.C
4、hinahasdroppedbehindinexploitationofflocculantswhichusinginaluminumindustry.Atpresent,allChinesealuminumfactoriesuseforeignflocculants.Thesettlementspeedofforeignflocculantsisveryquickandsettlementeffectisverywell,buttheirpriceishigh.Sosynthesizingamoreeffectiveandlowcost
5、flocculantbecomeabadlysolvingproblem.ThisthesisstudyODawaycomposingamoreeffectiveflocculantcontaininghydroxamicacidandphenyl.AcrylamideandBYXareusedasmonomer.CyclohexaneisusedassuccessivephaseandAIBNisusedasinitiator.Theexperimentationalsostudyontheinfuencingfactorsofthef
6、locculant,suchassyntheticalsystem,thedosageofinitiator,initiationtemperature,theconsistencyofmonomer,theW/O,andSOon.Itstudyonthekeystructurebyinfraredandultravioletrayspectralanalysis.Theresultofsettlementindicate:(1)Whensynthesizingsmallmolecularweightflocculants,Itwilll
7、argenwiththeethanolreducingofthemolecularweightofflocculantsinthesolutionanditwillattainthemaximumwhensolutionbecomeswaterentirely.(2)Whensynthesizingflocculantsinwategtheoptimumconditionisthattheconsistenceofacrylamideis25%,thedosageofinitiatoris4.4×10一mol‘L~,thesynthesi
8、zingtemperatureofpolyacrylamideis40~50。Candthesynthesizingtemperatureofhydroxamicacidis90"C.(3)W
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