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1、第31卷第2期青海大學(xué)學(xué)報(bào)(自然科學(xué)版)Vol.31No.22013年4月JournalofQinghaiUni?ersit?(NaturalScienceEdition)Apr.2013NaCl鹽溶液制備半水石膏的工藝條件研究*???,???(青海大學(xué)化工學(xué)院，青海西寧810016)摘要:???????????????????????????????????pH?????????????????????????????????:?????,??????????,????????;????,??????????,??????;??pH??????,??????????
2、??????,??????????,???????;???????,????????????????,??????????;????????,????????????????,?????????????NaCl????????????????:NaCl????15%,pH5?pH7,????95?,????2?3h,???1:6,????150r/min?關(guān)鍵詞:????;?????;????;????中圖分類號:O61文獻(xiàn)標(biāo)志碼:A文章編號:1006-8996(2013)02-0024-08P?????????????????????????????????????
3、???????????????????????????????????GUOH?????，?HANG??????*(SchoolofChemicalEngineering，QinghaiUni?ersit?，Xining810016，China)A???????:Preparationofhemih?drateg?psumb?aqueoussaltsolutionmethodunderatmosphericpressure?asconducted.Theinfluencesofsaltsolutionconcentration，reactiontemperature，
4、pH，slur-r?concentrationandstirringrateondeh?drationrateandcr?stalmorpholog??erein?estigated?ith-outcr?stalmodifier.Theresultssho?edthatthehigherthesaltsolutionconcentration，thefasterthedeh?drationrateofdih?drateg?psumandsmallercr?stalsi?e;thehigherthereactiontemperature，thefasterthedeh?
5、drationrateofdih?drateg?psumandbiggercr?staldiameter.WiththeincreaseofpH，thedeh?drationrateofdih?drateg?psumappearsfirstincreasesandthendecreasestrend，andcr?stallengthdecreasesfirstandthenincreasestrend，Withtheincreaseofslurr?concentration，thedeh?-drationrateofdih?drateg?psumappearsfirs
6、tincreasesandthendecreasestrend，cr?staldiameterin-creasesfirstandthendecreases.Withtheincreaseofstirringrate，thedeh?drationrateofdih?drateg?psumappearsfirstincreasedandthendecreasedtrend，cr?staldiameterdecreasesfirstandthenin-creases.Theoptimaltechnologicalconditions?eredeterminedasfoll
7、o?s:theconcentrationofsodiumchloridesolution15%，pH?alue5?7，reactiontemperature95?，reactiontime2?3h，slurr?con-centration1:6，stirringrate150r/min.K???????:hemih?drateg?psum;sodiumchloridesolution;deh?drationrate;cr?stalmorpholog?石灰石/石灰?石膏法煙氣脫硫技術(shù)會產(chǎn)生大量副產(chǎn)物?脫硫石膏，其主要成分為二水硫酸鈣，其7純度高，含量一
