达巴松诺尔盐湖卤水自然蒸发和冷冻实验中硒锶富集规律研究  

Study on the enrichment law of selenium and strontium in the natural evaporation and freezing experiments of Daba Songnor salt lake brine

作　　者：李世虎 郑文岩 张永和 张美燕 黄雪莉[1] 王雪莹 LI Shihu;ZHENG Wenyan;ZHANG Yonghe;ZHANG Meiyan;HUANG Xueli;WANG Xueying(College of Chemical Engineering,Xinjiang University,Key Laboratory of Cleaner Transition of Coal&Chemicals Engineering of Xinjiang Uyghur Autonomous Region,Urumqi 830017,China;Xinjiang Hongda Salt Industry Co.,Ltd.,Tacheng 834400,China)

机构地区：[1]新疆大学化工学院新疆煤炭清洁转化与化工过程自治区重点实验室,新疆乌鲁木齐830017 [2]新疆宏达盐业有限公司,新疆塔城834400

出　　处：《应用化工》2024年第12期2811-2816,共6页Applied Chemical Industry

基　　金：国家自然科学青年基金(22108232)。

摘　　要：以新疆达巴松诺尔盐湖卤水为对象,进行自然蒸发和低温冷冻实验,研究其在蒸发和冷冻过程中卤水的结晶析盐路线及稀有元素硒和锶的富集规律,以Na^(+),K^(+),Mg^(2+)//Cl^(-),SO_(4)^(2-)-H_(2)O五元体系在25℃和-15℃相图为参考分析,并采用X射线衍射进行析出盐类的物相分析。结果表明,在自然蒸发过程中,析出的盐依次为氯化钠、泻利盐、钾盐镁矾、光卤石;液相和固相中的硒含量都呈现先上升后下降的趋势,液相中锶含量有上升的趋势,表明在蒸发过程中,卤水中的硒和锶元素都呈一定的富集现象。在冷冻过程中,析出的盐为芒硝和氯化钠;随着温度的降低,液相中硫酸根和硒含量都呈现下降趋势,硒富集在固相芒硝中,锶的含量基本不变。以上研究为该盐湖资源的开发利用提供基础的理论数据。The Daba Songnor salt lake in Xinjiang contains not only major elements,but also trace elements,selenium and strontium.The crystalization routes of the brine during the evaporation and freezing processes,as well as the enrichment regulations of trace elements selenium and strontium were studied.The solid samples were analyzed by X-ray diffraction.Using the phase diagrams of the quinary system Na^(+),K^(+),Mg^(2+)//Cl^(-),SO_(4)^(2-)-H_(2)O at 25℃ and-15℃ as a reference,analyze its salt precipitation path.The results show that during the natural evaporation process,the precipitated salts are sodium chloride,salbutamol,potassium magnesium aluminate,and carnallite in sequence.The selenium content shows a trend of first increasing and then decreasing in both the liquid and solid phases.The strontium content in the liquid phase shows an increasing trend.This indicates that selenium and strontium in the brine have a certain enrichment phenomenon during the evaporation process.During the freezing process,the precipitated salts are mirabilite and sodium chloride.As the temperature decreases,the content of sulfate ions and selenium in the liquid phase decreases and selenium is enriched in the solid phase of sulfate.The strontium content basically remains unchanged.These results provide fundamental thermodynamic data for the comprehensive utilization of the Daba Songnor salt lake.

关 键 词：达巴松诺尔盐湖 稀有元素 硒 锶 析盐规律 

分 类 号：TS396.5[轻工技术与工程]