An Insight on Future Development Approaches of Salt Lake Magnesium Resources:from the Current Situation of China's Magnesium Industry

Magnesium-bearing minerals discovered on the earth so far occur mainly as solid or liquid.The former include magnesite(Mg CO3),dolomite(Mg CO3·Ca CO3),carnallite(Mg Cl2·KCl·6H2O),bischofite(Mg Cl2·6H2O)and

Compare on characteristic of different chemical type salt lake brines from Tibet during evaporating

1 Introduction China is a country which has many salt lakes.Tibet is the area where have numerous salt lake,because the sources of water have multiple chemical type,resulting in Tibet salt

Intercalation Assembly and Chemical Product Engineering of Layered Intercalated Functional Materials Based on Efficient Utilization of Magnesium Resources in Salt Lakes

1 Introduction Magnesium salts are very important by-product of salt lake industry in West China.Nearly 200 million cubic meters of waste brine are released to the environment

Establish Green Industry System,Improve the Comprehensive Utilization Level of Salt Lake Resources,and Create A New Pattern of Green Sustainable Development in Qaidam Basin

Qaidam Basin in Qinghai Province has rich multiple complex resources with salt lakes as the core.These resources form a special condition for the development of green economy,having rare and particular nature.The

A PROPOSAL FOR DEVELOPING CHEMISTRY AND CHEMICAL ENGINEERING OF CHINA'S SALT LAKES

The author puts forward a proposal for developing chemistry and chemical engineering of China’s salt lakes on the basis of an investigation into exploitation and utilization of salt lake resources all over the world. It contains the subjects of setting up an engineering research center, mainly developing leading products, giving priority to the development of a chemical industry by using Qinghai salt lake resources, actively popularizing results, stressing basic research and systematic management.

New Thoughts of Comprehensive Development and Utilization of Salt Lake Resources in Qinghai Province

Qinghai Province has unique salt lake resources in China characterized by multicomponent,big storage,multi types and easy exploitation.These salt lake resources are concentrated in Qaidam Basin.

Hydrochemistry of Salt Lakes in Southeastern Transbaikalia(Russia) in the Time of Arid Phase of Climate Change at the Beginning of the XXI Century

1 Introduction In the south of Eastern Transbaikalia in the border area with China and Mongolia,there are at least 300 saline without outlet lakes.They are confined to the semi-arid zone Daurian steppes with pronounced continental salinization processes and are mostly located on the bottoms of the intermountain basins.Their origin is related to evaporative concentration of fresh waters lakes filling.

Production of Potash and N-Mg Compound Fertilizer via Mineral Shoenite from Kunteyi Salt Lake:Phase Diagrams of Quaternary System(NH_(4))_(2)SO_(4)-MgSO_(4)-K_(2)SO_(4)-H_(2)O in the Isothermal Evaporation and Crystallization Process

Based on the requirement of the new technology for producing potassium sulfate and N-Mg compound fertilizer,boussingaultite,by the reaction of the mineral shoenite from Kunteyi Salt Lake,Qinghai province,and the industrial by-product ammonium sulfate,the solubilities of the quaternary system(NH_(4))_(2)SO_(4)-MgSO_(4)-K_(2)SO_(4)-H_(2)O at 25.0℃in the isothermal evaporation and crystallization process were measured using the isothermal evaporation method,and the corresponding phase diagrams were plotted.According to the diagram,this system contains six saturation points and six solid phase fields of crystallization,which correspond to(K1-m,(NH_(4))m)_(2)SO_(4),(NH_(4))_(2)SO_(4)·MgSO_(4)·6H_(2)O,K_(2)SO_(4)·MgSO_(4)·6H_(2)O,MgSO_(4)·6H_(2)O,(K1-n,(NH_(4))n)_(2)SO_(4)·MgSO_(4)·6H_(2)O and MgSO_(4)·7H_(2)O,respectively.By analyzing and calculating the isothermal evaporation and dissolution phase diagram of this quaternary system at 25.0℃,K_(2)SO_(4)and(NH_(4))_(2)SO_(4)·MgSO_(4)·6H_(2)O can be separated via K_(2)SO_(4)·MgSO_(4)·6H_(2)O and(NH_(4))_(2)SO_(4)as raw materials.Theoretical calculations about the proposed process were carried out and verified by experiment,which indicated that the yield of potassium sulfate was improved and the magnesium resources were fully utilized.

Evaluation of boron isotopes in halite as an indicator of the salinity of Qarhan paleolake water in the eastern Qaidam Basin, western China

In this study, nineteen brine samples from the Qarhan Salt Lake(QSL) in western China were collected and analyzed for boron(B) and chlorine(Cl) concentrations, total dissolved solids(TDS), pH values and stable B isotopic compositions. The B concentrations and δ^(11) B values of brines in the QSL range from 51.6 mg/L to138.4 mg/L, and from +9.32& to +13.08&, respectively. By comparison of B concentrations and TDS of brines in QSL with evaporation paths of brackish water, we found that B enrichment of brines primarily results from strong evaporation and concentration of Qarhan lake water. Combining with comparisons of B concentrations, TDS, p H values and δ^(11) B values of brines, previously elemental ratios(K/Cl, Mg/Cl, Ca/Cl, B/Cl) and δ^(11) B values of halite from a sediment core(ISL1 A), we observe good correlations between B concentrations and TDS, TDS and pH values, pH and δ^(11) B values of brines, which demonstrate that higher B concentrations and more positive δ^(11) B values of halite indicate higher salinity of the Qarhan paleolake water as well as drier paleoclimatic conditions. Based on this interpretation of the δ^(11) B values of halite in core ISL1 A, higher salinity of the Qarhan paleolake occurred during two intervals, around 46-34 ka and26-9 ka, which are almost coincident with the upper and lower halite-dominated salt layers in core ISL1 A,drier climate phases documented from the δ^(18) O record of carbonate in core ISL1 A and the paleomoisture record in monsoonal central Asia, and a higher solar insolation at 30°N. These results demonstrate that the δ^(11) B values of halite in the arid Qaidam Basin could be regarded as a new proxy for reconstructing the salinity record of paleolake water as well as paleoclimate conditions.

盐湖化工领域产教融合育人机制研究与实践

产教融合育人是培养创新型工程人才的新举措,对行业特色高校构建应用型人才培养新生态、有效构建校企命运共同体具有重要意义。以北京化工大学盐湖化工领域产教融合育人为例,对校企协同育人的实践措施与机制探索进行了剖析,为行业特色高校健全产教融合育人机制提供了有益的借鉴。从特色课程、学科方向、联合研究中心、人才培养计划、实践培训基地等多层次解析了产教融合协同育人的实践路径与实施措施,为行业高质量发展亟需的创新型工程人才培养提供了有价值的参考。

世界级盐湖产业基地标准体系架构研究

盐湖资源是青海的第一大资源,也是国家战略性资源。盐湖产业在保障粮食安全、能源安全等方面至关重要。然而,目前国内外盐湖产业界尚无统一的标准体系,不利于推进“加快建设世界级盐湖产业基地”的顶层设计。论文归纳梳理了全球盐湖产业相关的现行标准,系统分析了青海盐湖产业相关标准的现状和地位,初步构思了世界级盐湖产业基地标准体系基本框架,提出了加快推进世界级盐湖产业基地标准体系建设的若干措施建议。研究工作切实发挥好标准化对建设世界级盐湖产业基地具有支撑和引领作用,规范和引导盐湖产业创新发展,深入落实国家标准化有关政策要求都具有参考意义。

柴达木盆地巴仑马海盐湖黏土沉积矿物学及稀有稀散元素地球化学特征

黏土型锂矿也被称为沉积型锂矿,是重要的锂矿类型之一,它以结构锂或吸附锂的赋矿形式赋存于蒙皂石族矿物、伊利石等黏土矿物的层间或晶格中。在柴达木西北部的巴仑马海成盐盆地以黏土层为研究对象,对黏土样品进行了化学全分析、X射线衍射分析、主微量元素含量分析、扫描电镜测试,探讨了黏土层内黏土矿物的物质组成及元素地球化学特征。结果表明,研究区黏土层内的黏土矿物主要由伊利石、绿泥石、伊蒙混层、高岭石等组成。元素地球化学分析显示,锂应该主要赋存于伊利石、绿泥石、伊蒙混层等黏土矿物中,与Si、Al、K、Mg等元素具有较强的正相关性;B的赋存与绿泥石密切相关,与Mg、Fe元素具有较好的正相关性;此外,Rb、Cs与Li在地质过程中具有相似的地球化学行为。

柔性陶瓷涂料在盐湖钾盐生产设备的应用及耐蚀性能研究

盐湖资源开发过程中,金属材料腐蚀问题对设备的安全运转和生产的连续稳定运行造成很大危害。因此设备的腐蚀防护是盐湖资源开发的基本保障之一。以陶瓷颗粒为主要填料、改性环氧树脂为成膜物,开发出可应用于盐湖苛刻工况环境中的柔性陶瓷涂料,并对涂层基本物理机械性能和耐腐蚀性能进行研究。结果表明:柔性陶瓷涂料耐磨性好,在喷砂钢材表面附着力可达20.3 MPa,综合机械性能优良;涂层的耐化学溶剂性能良好,室温下,在10%NaCl溶液,10%NaOH溶液中浸泡30天后涂层表面无任何变化;在30%H_(2)SO_(4)溶液中浸泡30天后涂层有轻微变色,在10%HCl溶液中浸泡30天后涂层起泡,无红锈;应用于热溶生产氯化钾工艺中的浓密机底流泵管接头内壁防护,可有效提高设备的使用寿命。

盐湖水制备纯碱综合实验的课程思政设计

将盐湖资源综合利用研究作为实际应用案例融入无机化学及化学分析实验教学,将粗盐提纯、纯碱制备、碱纯度测定等无机、分析化学基础知识学习和盐湖卤水的工业应用相结合,学生通过自主设计方案、完成实验、并对方案中涉及的各项效能指标进行综合评估,加深对所学专业知识在实际生产生活中应用的理解和认识,提升了学生的学习兴趣和专业自信。同时,教师结合侯氏制碱工艺、盐湖综合利用等内容的教学,将思政元素融入课堂教学活动中,培养学生的科学素养、创新精神、团队精神和社会责任感。

半干旱风沙草原区盐湖植物防护体系土壤理化性状特征

为探究植物防护措施对半干旱风沙草原区土壤的改良效应,以查干淖尔盐湖植物防护体系为研究对象,采用野外调查结合室内试验的方法,测定不同区域土壤理化性质,分析0—30 cm深度土壤含盐量、土壤酸碱度、土壤粒径组成、土壤有机质和氮磷钾含量的变化。结果表明,查干淖尔盐湖植物防护体系营造建设20年后,在防护带阻挡风蚀物质和植物改善土壤的协同作用下,原有高盐强碱土壤环境出现了显著变化。与干涸湖心相比,植物防护体系内各样地pH均有不同程度的降低,碱蓬防护带内土壤含盐量降低75.34%;碱蓬防护带内土壤粘粒和粉粒含量增幅明显,较干涸湖心分别增加51.60%和22.14%,粗砂含量较干涸湖心降低72.06%;碱蓬防护带内土壤速效钾、速效磷、有机质含量较高,分别是干涸湖心的86%、39%、55%;过渡带白刺灌丛速效氮含量较高,为干涸湖心的28%。总体上各养分含量与粘粒和粉粒呈显著相关(P<0.05)。历经20年的营建,碱蓬防护带内土壤速效钾、速效磷、有机质含量较建设初期明显增长,表明植物防护体系对土壤具有明显的改良作用。研究成果为盐湖植物防护体系防护效应评价提供数据支撑,并为半干旱风沙草原区干涸盐湖风蚀控制和区域植被恢复重建提供科学依据。

组合纳滤在煤化工废水分盐改造中的工程应用研究

为实现结晶盐资源化,对某煤化工零排放项目采用组合纳滤技术+重结晶工艺进行改造。结果表明,组合纳滤可有效实现分盐及浓缩功能,当进水中Cl-/SO_(4)^(2-)=0.37~0.98时,组合纳滤产水Cl-/SO_(4)^(2-)=30.7~298.5(均值117.9),浓水中Cl-/SO_(4)^(2-)=0.09~0.28(均值0.15),浓水中SO_(4)^(2-)浓度可达80 000 mg/L以上,截留率>99%,Cl-平均截留率为-18.9%;产出合格NaCl及Na2SO4结晶盐,纯度均在98.5%以上,有效地实现了混盐资源化。

分盐零排放技术在煤化工高盐废水中的应用

以某企业为例,综述了煤化工高效高盐废水纳滤分盐零排放工艺技术路线及通过深度去除污染物实现长周期稳定运行的工程应用案例及其重要意义。

煤化工废水热法分盐结晶工艺工程实例

针对某煤化工企业的上游中水回用装置所产生的高盐、高COD废水,采用热法分盐结晶工艺,实现了废水零排放与结晶盐资源化利用的目的。介绍了该处理工艺的流程及设计参数,给出了处理效果及运行成本。实际运行结果表明,产水完全符合回用要求,硫酸钠结晶盐平均纯度达99.09%,氯化钠结晶盐平均纯度达98.52%。该装置的连续稳定运行标志着热法分盐技术在煤化工废水处理领域得到了成功应用。

盐化工人才激励的创新实践与研究

分析了盐化工行业人才激励的现状,通过对盐化工人才激励方式的创新实践与研究,认为优化的创新型和个性化的人才激励方式对于盐化工企业具有重要意义,通过实践案例分析,提高员工的工作积极性和创造力,促进盐化工企业的可持续发展。

煤化工企业含盐污水零排放工艺研究

针对煤化工含盐废水排放量大、污染严重的问题,提出了一种新的含盐污水零排放工艺技术。将含盐废水先经过生化处理、膜分离处理后加入到强制蒸发系统中,使其形成蒸发结晶固定,然后将该部分固体作为危废物进行处理。在工艺过程中产生的二次汽冷凝水则可以用于系统的清洗水并回收利用,在系统内的不凝气体则可以通过水环真空泵抽出并排入到空气中,从而实现了煤化工企业含盐废水的零排放。