本设计的任务是年产80万吨氧化铝石灰拜耳法高压溶出车间的设计。在对国内外各种氧化铝生产工艺进行分析和对比的基础上，并依照建厂的要求及具体情况，确立了本设计的工艺流程（石灰拜耳法生产氧化铝）。经过论证，确定了生产的工艺参数：配料分子比ak=1.45；循环母液ak=3.2,碱浓度=230g/L；溶出温度=260°C，溶出赤泥A/S=1.33,溶出赤泥N/S=0.22；赤泥洗涤底流L/S=1.0。在以上参数的基础上，确立了本设计的工艺流程：铝土矿的高压溶出一溶出液稀释一沉降分离一赤泥洗涤一晶种分解一焙烧一母液蒸发。对工艺过程分析及经济技术指标论证之后，参照其它氧化铝厂的经验数据，进行了全厂的物料平衡以及溶出车间的热平衡计算,并据此进行设备的选型，设计出完整的溶出车间。最后进行了经济技术分析。此外，绘制了主体设备、高压溶出车间平面布置图和工艺设备连接图各一张。关键词：氧化铝；石灰拜耳法；高压溶出；车间设计ABSTRACTThistaskwasdesignedthedigestingworkshopofaluminarefinerywithoutput800,000tonsAl2O3peryear.Basedonextensiveanalysisoftheinternationalanddomesticaluminaproductiontechnologyandthespecificrequirementsofthedesign,theproductionprocess(Lime-Bayerprocess)isestablished.Theparametersofproductionprocessareobtainedasfollowed:theakofmixtureis1.45;theakandalkalineconcentrationofpregnantliquoris3.2and230g/L,respectively;thedigestingtemperatureis260°C,theA/Sofredmudis1.33,andN/Sofredmudis0.22;theL/Sofsedimentationredmudisunderflowis1.0.Onthebasisoftheaboveparameters,thetechnologyisestablishedasfollows:Theprocessofdigesting一diluting一settlingandseparating一redmudwashing一seedingdecomposition-calcinations-motherliquorevaporation.Andthen,thecalculationofmaterialsbalancesinthewholeprocesses,andenergybalancesofthedigestingworkshopwasdone.So,thewholeworkshopcameintobeing.Finally,thispapertoldthenumberofthecrewaswellastheirpostsintheplant,demonstratedanestimatedfinancecharttoshowthereasonabilityofthisdesign.Whatismore,threedrawingsarefinished.Thethreedrawingswererespectivelyaboutthemainequipment,theconnectionofequipments,theplanelayoutofthedigestingworkshop.Keywords:Alumina;Lime-Bayerprocess;Digestion;PlantdesignTOC\o"1-5"\h\zHYPERLINK\l"bookmark11"\o"CurrentDocument"\h第1章绪论1HYPERLINK\l"bookmark14"\o"CurrentDocument"\h铝土矿资源情况1HYPERLINK\l"bookmark17"\o"CurrentDocument"\h1.2氧化铝工业的发展概况11.2.1世界氧化铝工业情况11.2.2我国氧化铝工业情况1HYPERLINK\l"bookmark20"\o"CurrentDocument"\h1.3我国氧化铝工业可持续发展的策略21.3.1加大铝土矿资源发掘力度21.3.2合理布局21.3.3选择恰当的工艺流程21.3.4革新生产规模和设备2HYPERLINK\l"book