铷、铯分离提取技术研究进展

由于具有优异的光电效应性能和很强的化学活性,铷和铯在现代高科技领域中应用前景光明。近年来,铷和铯的应用及其分离提取技术得到了广泛研究。本文系统评述了铷和铯分离提取技术的现状,比较了各种方法的优缺点,并对铷和铯分离提取技术的发展进行了展望。     

云南某地蚀变玄武岩型铷铯矿工艺矿物学研究

云南某地蚀变玄武岩中含铷0.128%、铯0.039%,通过采用化学分析、物理分析的方法和手段,从工艺矿物学角度对铷、铯的赋存形式进行了全面的分析与研究,查明了黑云母、绿泥石是铷、铯的主要载体矿物,为回收铷、铯提供了矿物学依据,对采用合理的选矿工艺流程以及提取工艺具有重要的指导意义。     

郑州综合所实现卤水中铷铯高效分离

正中国地调局郑州综合所申报的"卤水中铷盐的提取方法、卤水中铯盐的提取方法"获国家发明专利授权,专利号为ZL201410539330.8。针对盐湖卤水及深层卤水中伴生的铷、铯资源回收利用存在的技术瓶颈,郑州综合所通过长期的技术攻关,提出了适合不同类型卤水中铷盐、铯盐的分离提取方法,采用离子交换一萃取分离等技术路线,     

卤水中铷铯盐的提取方法获国家发明专利授权

正日前,中国地质调查局郑州矿产综合利用研究所申请的发明专利"卤水中铷盐的提取方法、卤水中铯盐的提取方法"获国家发明专利授权,专利号为ZL201410539330.8。铷、铯是化学性质极其活泼的碱金属元素,具有优异的光电性能,在催化剂、光电池、磁流体发电及医药领域有广泛的应     

溶剂萃取法从浸出液中分离铷铯试验研究

采用t-BAMBP+二甲苯体系对某铷铯浸出液进行了萃取分离铷铯试验研究。结果表明:在t-BAMBP浓度30%、料液碱度(OH^-)0.2 mol/L、萃取相比V_O/V_A=1、洗涤相比V_O'/V_A'=1、室温萃取时间3 min条件下,对浸出液进行6级分馏萃取(2级萃取、4级洗涤)连续试验,有机相中铯萃取率达96.82%,88.27%的铷留在水相中,铷铯得到了较好分离。     

低浓度铯铷溶液萃取分离试验研究

以二甲苯作稀释剂, 采用有机萃取剂t-BAMBP萃取分离低浓度铯铷溶液中的铯、铷。考察了OH^-浓度、萃取剂浓度、萃取相比和萃取时间对铯和铷萃取率及分离系数的影响。结果表明: 在c(OH^-)＝0.1 mol/L, c(t-BAMBP)＝0.7 mol/L, 萃取相比为0.7, 萃取时间为1 min时, 铯萃取率达到84.43%, 铯铷分离系数达到7.26, 分离效果较好。     

锂云母复合盐焙烧-水浸提取锂铷铯

采用复合盐焙烧-水浸工艺从锂云母中提取锂、铷、铯,研究了焙烧工艺参数及浸出工艺参数对锂、铷、铯浸出率的影响。结果表明,锂云母精矿焙烧时,复合盐焙烧效果优于单一盐添加剂,CaCl₂+Na₂CO₃组合添加剂具有焙烧时氯气排放少、焙烧矿浸出效果好等优点。从锂云母中回收锂、铷、铯,较佳的焙烧-浸出工艺条件为: CaCl₂+Na₂CO₃组合为焙烧添加剂,锂云母精矿∶CaCl₂∶Na₂CO₃(质量比)=1∶0.5∶0.2,锂云母精矿焙烧温度900 ℃、焙烧时间2 h,对焙烧矿进行室温水浸,浸出时间1 h、液固比2∶1,此时锂、铷、铯浸出率分别为86.64%、92.58%、85.37%。含锂浸出液经2次调节pH值净化除钙,升温至95 ℃后加入饱和Na₂CO₃溶液,结晶得到碳酸锂,样品纯度为99.08％,产品纯度及杂质含量达到一级碳酸锂标准。沉锂母液采用溶剂萃取法分离铷、铯,铯萃取率达到99%以上,铷洗脱率达到96%左右。     

含铷、铯锂云母矿的复合盐焙烧-浸出性能及机理

锂被称为21世纪的战略金属,而锂云母矿是目前提锂的主要锂矿物之一。本文章对含铷、铯的锂云母矿进行了多种焙烧方式探索,研究表明,硫酸盐焙烧法对锂浸出效果明显,硫酸钠+硫酸钙组合对锂的浸出率为92.53%,氯盐焙烧法对铷、铯的浸出效果优异,氯化钠+氯化钙组合其铷、铯浸出率分别为96.13%,94.86%。进一步试验表明,焙烧添加剂中Na~+对锂的浸出有积极效果,Ca~(2+)对铷、铯的浸出有提升作用。综合试验结果,以SC21(碱金属盐混合物)为焙烧添加剂,锂云母矿:SC21(质量比)=1:0.7,焙烧温度为880℃,焙烧时间为45 min,此时锂、铷、铯的浸出率分别为:94.52%,92.03%及93.56%。     

锂云母提锂废液中萃铯机理研究

针对锂云母提锂废液中稀碱金属铯、铷难以高效分离现状,为实现深度萃铯脱铷目的,通过热力学分析萃取过程中铯与t-BAMBP结合形成的分子簇稳定形态,探索提锂废液中低浓度铯萃取机理。结果表明：分子簇的稳定性与t-BAMBP和铯离子结合的数量有关,其中3t-BAMBP-2Cs型分子簇的形成热低,可稳定存在于有机相内。在t-BAMBP+磺化煤油+环己烷萃取体系中,最佳试验条件下经六级萃取二级洗涤,铯的萃取率为99.52 %,铷的洗脱率为96.69%,铷、铯得到较好的分离。     

改性白云石铷铯浸出试验研究

常压下用水从改性白云石中浸出铷和铯, 考察了温度、浸出时间、液固比、浸出液循环使用次数对铷铯浸出率的影响。试验结果表明: 改性白云石加入水中, 在浸出温度40 ℃、浸出时间120 min、液固比3∶1、浸出液循环次数为3次时, 铷和铯浸出率分别为95.13%和96.00%, 浸出效果较好。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

2014 second batch of rare earth quota released

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矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586