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时间:2020-03-27
《硫酸镁亚型盐湖卤水高温蒸发析盐结晶规律.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2O15年9月化学研究486第26卷第5期CHEMICALRESEARCHhttp://hxya.cbpt.cnki.netEvaporatingcrystallizationbehaviorofthemagnesiumsulfatesubtypesbrineathightemperatureXIEShaolei,WANGXiaohan,JINGYan,CHENGaoqi。,ZHANGQuanyou,JIAYongzhong(1.QinghaiInstituteofSaltLakes,ChineseAcade
2、myofSciences,Xining810008,Qinghai,China;2.MangyaXingyuanPotashCo.,Ltd,Golmud816000,Qinghai,China)Abstract:TheevaporatingcrystallizationofthemagnesiumsulfatesubtypesbrineofDalangtanSaltLakeinQinghaiProvinceofChinahasbeeninvestigated.Theresultsshowedthatthese
3、—quenceofcrystallizationbehaviorwasMgSO4·H2O,NaC1,MgSO4·6H2O,KC1·MgC12‘6H2Oandothersaltsduringevaporatingprocesswithtemperaturevaryingfrom102℃to122℃.BasedontheanalysisofliquidphasecompositionsandX-raydiffraction,wefoundthattheoptimalevaporatingtemperaturewa
4、s117℃.Atthispoint,themassfractionofSO一waslow—erthan2andthesystemcouldbesimplifiedasNa。广,K,Mg//el一——H2Oquaternarysystemwhichmeetstherequirementoftheexploitationofpotassiumchlorideprocess.Thesefindingsprovidetheoreticalfoundationforthecomprehensiveexploitatio
5、nandutilizationoftheDalangtanSaltLakebrine.Keywords:saltlake;magnesiumsulfatesubtypesbrine;hightemperatureevaporating;crys—tallizationCLCnumber:0645.5Documentcode:AArticleID:1008—1011(2015)050486—05硫酸镁亚型盐湖卤水高温蒸发析盐结晶规律谢绍雷,汪小涵,景燕,陈高琪,纪律,张全有,贾永忠(1.中国科学院青海盐湖研究所
6、,青海西宁810008;2.茫崖兴元钾肥有限责任公司,青海格尔木816000)摘要:针对青海大浪滩盐湖区硫酸镁亚型盐田卤水进行了高温蒸发结晶规律的研究,结果表明该盐田卤水在1o2~122℃高温蒸发时析盐顺序为:MgSO·H2O、NaC1、MgSO·6H2O、KC1·MgC12·6HzO和其他混盐.通过对不同温度下的液相组分分析和固相X射线衍射分析表明,利用高温蒸发开采此种卤水时,最适宜的蒸发温度应控制在ll7℃左右.此时,该卤水组成中s0;的质量分数低于2,同时K。。还未析出,可以简化为Na,K,Mgz+//
7、el—H0四元体系,以便达到开采氯化钾的工艺需求,为该盐湖卤水的综合开发利用提供理论参考.关键词:盐湖;硫酸镁亚型卤水;高温蒸发;结晶规律DalangtanSaltLake,locatedinthenorthwestmineralsandbrineresources,isthesecondlargestofQaidamBasinwhichcontainsabundantsaltlakesaltlakeinQaidamBasin[.TheintercrystallinebrineinDalangtanSaltL
8、ake,isthetypicalmagne—Receiveddate:2O15—0423.siumsulfatesubtypesbrine,inwhichthemassFoundationitem:NationalNatura1ScienceFoundationofChinafractionofpotassiumchlorideis3一49/6andthe(21373252)andYouthGuid
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