用SL—406阳离子交换树脂从氯化物含量较高的硫酸浸出液中提取铀

研究了用ＳＬ—４０６新型阳离子交换树脂从氯化物含量较高的硫酸浸出液中提取铀时各种因素对吸附的影响。结果表明，ＳＬ—４０６树脂有较好的选择性、稳定性及较高的工作容量．可有效地从含氯化物浸出液中提取分离铀。     

用阴离子交换树脂从含氯离子较高的硫酸浸出液中回收铀(二)负载树脂氯化铵溶液转型-水淋洗工艺研究

研究了用氯化铵溶液将SLD-225b树脂吸附的硫酸铀酰,转为氯化铀酰、水淋洗、碳酸氢铵沉淀工艺。与常规的硝酸铵溶液淋洗工艺相比,此工艺省去贫树脂转型,得到铀浓度较高的淋洗合格液和脱水、过滤性能良好的铀产品。用4倍树脂床体积氯离子质量浓度为179.8 g/L的氯化铵溶液转型、用3倍树脂床体积的水淋洗,贫树脂含铀<1 mg/g,淋洗效率>99%,试验条件下合格液铀质量浓度>30 g/L。     

地浸采铀工艺中氯离子的作用及其影响

试验和分析了用氯化钠溶液作淋洗剂的铀地浸工艺中氯离子对淋洗的影响,及浸出液中氯的累积等问题。试验结果表明:淋洗剂NaC l浓度在28 g/L以上就可以使树脂基本上转成氯型,淋洗过程中,液相必须有一定氯离子浓度,方可获得较高铀浓度的合格液;对NaC l作淋洗剂的产品进行洗涤可以减少C l-含量;随吸附原液氯离子浓度增高树脂铀容量下降,当吸附原液氯离子浓度大于2.5 g/L时,树脂铀容量下降约20%以上,氯离子浓度<1 g/L时,对吸附影响不明显。     

从铀铍浮选尾矿中回收铀的工艺研究

为了回收铀铍浮选尾矿中的铀，同时降低铀产品中铍的含量，采用工艺矿物学方法分析了某铀铍浮选尾矿中铀、铍的赋存状态，采用硫酸浸出工艺浸出尾矿中的铀，考察了酸浓度、浸出时间、浸出温度以及液固体积质量比对铀、铍浸出率的影响，并采用阴离子交换树脂探索了从浸出液中回收铀的可行性。研究表明，铀铍浮选尾矿中的铀较易被硫酸浸出，铍不易被浸出，采用离子交换法能够回收铀并实现铀铍分离。     

从埃及东部沙漠地区Wadi Belih的矿石物料中提取铀

1996年IO月于北京召开的国际钢提取会议的文集中，收集了M．A．Mahdy等人介绍的从埃及东部沙漠地区WadBe！山的矿石物料中提取铀的文章。这项工作属于核燃料循环初始阶段的工作。所试验的矿长来自埃及东部沙漠北区的Hammamat沉积粉砂岩中。矿石中的铀矿物主要是硅酸盐矿物的硅钙铀矿、钒酸盐矿物的钒钙铀矿，此外还有少量硫酸盐矿物的板菱铀矿。从硫酸浸出液中回收钻采用阴离子交换树脂和溶剂革取工艺，而从碱性浸出液中回收油只使用阴离子交换树脂。本工作还研究厂油酥二硫酸盐二价阴离子络合物被吸附在IRA－400树脂的全部交换位置上…     

某铀矿碳酸盐浸出液离子交换工艺有关问题探讨

某铀矿采用离子交换工艺回收碳酸盐浸出液中的铀,由于吸附原液含有大量固体不溶物,平均浊度达500 NTU,导致吸附工序出现吸附流量降低、树脂床反冲洗次数增多、树脂铀负载容量降低等问题.结合该铀矿生产实际,对碳酸盐浸出液离子交换回收工艺中的有关问题进行探讨.     

用过氧化氢从下马塘铀矿石浸出液中沉淀铀

研究了从铀矿石浸出液中回收铀的化学沉淀法，该法主要包括石灰沉淀铁，氢氧化铁浆体预测处理和Ｈ２Ｏ２沉淀铀。浸出液用石灰乳中和至ＰＨ３．７沉淀氢氧化铁，此沉物经絮凝和预处理后返回原矿浸出工序，从而省支了氢氧化铁浆体的过滤工序。用Ｈ２Ｏ２从除铁浸出液中沉淀铀，同时加入ＭｇＯ浆体，维持ＰＨ３．５。研究结果表明，用石灰Ｈ２Ｏ２和ＭｇＯ就能从浸出液中制取铀含量高于６５％的过氧化铀产品，并且上述试剂均不污染环境     

用大孔双官能团膦酸树脂从酸溶液中回收铀

SabharwalK．N．等人在（SolvenExtractionandIonExchanse）1996年14卷6期上撰文，介绍用大孔双官能团膀酸树脂（MPBPA）从硝酸、硫酸、盐酸、磷酸和高氯酸溶液中回收铀。MPBPA吸附铀的分配系数与常用磺酸树脂的相应值的比较结果表明，该树脂更适合于从宽酸度范围的各种酸溶液中回收铀。在硝酸溶液中，硝酸浓度增高，铀的分配系数见先下降后上升，但在试验酸度范围内（O．1～6．Omol／L）均获得高分配系数值，浓度6．Omol／L时的几值为2475。MPBPA特别适合从硝酸溶液中回收轴。盐酸溶液与硝酸溶液不同，溶液中的氯离子与钢生成强…     

用树脂回收铀矿石细菌浸出液中铀的试验研究

以相山铀矿石的细菌浸出液为对象，用717型强碱性阴离子交换树脂对细菌浸出液中的铀进行了静态和动态吸附试验，用抗坏血酸对吸附后与铀共存于树脂上的Fe³⁺杂质进行了动态淋洗试验。静态吸附试验结果表明，要提高树脂对铀的吸附容量，细菌浸出液的铀浓度应尽可能高，并应将溶液的pH值调至1.4左右，同时树脂与溶液的接触时间应尽可能长。动态吸附试验结果表明，717型强碱性阴离子交换树脂对铀有较强的吸附能力，当柱床体积倍数为206时，树脂上的铀吸附量达93.54 mg/mL。动态淋洗试验结果表明，抗坏血酸对Fe³⁺有较强的还原性，吸附后先用抗坏血酸从负载树脂上洗脱Fe³⁺，可取得良好的铀铁分离效果。     

用离子交换法从某铀钼矿浸出液中回收与分离铀钼的研究

简要介绍了目前国内外铀、钼的吸附分离情况,针对某铀钼矿浸出液进行的离子交换法分离铀、钼的研究结果表明,采用大孔树脂B吸附铀钼-饱和氯化钠溶液转型-水解吸铀-氢氧化钠或氢氧化铵溶液解吸钼的解吸流程是可行的,可实现铀、钼的有效分离和回收.     

China rare earth market review

正November 21~30,2014Due to weak demand from downstream industries,transactions of rare earth in Chinese domestic market were inactive.It was difficult to sell any rare earth products except for dysprosium oxide and terbium oxide.Suppliers lost confidence in recent market.Demand for rare earth products was soft.Consumers continued to take a wait-and-see attitude.Rare earth export market remained slow.     

Current situation and future trend of China rare earth luminescent materialindustry(continued)

<正>Developing ecological lighting source The world is facing the big problem of energy shortage today and the contradiction between economy development and environmental protection is worsened.Therefore,people are more likely to choose an ecological light source that is more energy efficient and environmental friendly.The choice provides great opportunity for the development of rare earth optical material industry in China.The concept of green lighting positions rare earth luminescent material as a leading player in illumination market.The light source of both rare earth luminescent lamp and LED lamp is ecological and energy saving.This is why     

Galaxy Magnets achieved the net profit of 34.02 million yuan in the first six months of 2014

正Galaxy Magnet announced its financial results for the first half of 2014 on August 14.For the first six months ended on 30 June 2014,Galaxy Magnet achieved operation income of RMB 182.3 million,up8.40% over the same period of 2013,and the net profit attributable to the shareholders of the listed company of 34.02 million yuan,increasing 35.49% over the same period of last year.Stable performance increase was led by development of new customers and application market of magnets.     

Rare Earth Application in Steel in China

<正>China has rich rare earth resources.Output of rare earth and steel in China ranks the top first in the world.However,there is still certain distance between the steel produced in China and developed countries from the point of varieties and quality.China still has to import some types of steel.Improving the quality should be emphasiZed in future development of steel industry in China.Rare earth can be used to upgrade traditional steel     

稀散金属产业的观察与思考

分析了近年来国内外稀散金属产业的生产、应用、资源与市场状况.铟锡氧化物靶材、砷化镓晶片、锗红外材料、铼高温合金和硒在电解锰及玻璃的应用等已成为稀散金属的主要应用领域.稀散金属的产量快速增长达到历史高位而导致了市场的失衡.以GaInP_2/GaAs/Ge,CIGS和CdTe为代表的非硅系太阳能电池是稀散金属的新兴应用领域,将给稀散金属带来日益增长的需求.     

China rare earth market review

正November 1~10,2014Chinese rare earth market was still inactive.Demand for rare earth products was weak.Consumers took a wait-and-see attitude for lower price.As it was an off season for rare earth products,it was expected that prices of rare earth could continue turbulence at the bottom in short terms.Due to a sharp drop,demand for rare earth from downstream recovered.Affected by new energy vehicles,wind powder and energy-efficient appliances,production of rare earth permanent     

China rare earth market review

正August 1~10,2014 There was some good news in rare earth industry recently.Restructuring plans of rare earth groups led by Baotou IronSteel Group and Xiamen Tungsten Group respectively have been approved by MIIT.And rare earth storage policy,which had been expected for a very long time,has been launched officially.Pushed by the good news,rare earth price started to rebound since August 5.Price of didymium oxide and dysprosium oxide rose about 1% to 2%,averagely.About 10% of     

China rare earth market review

正July 1~10,2014Due to weak demand from downstream industry and slow transactions,rare earth market remained weak and price of rare earth products continued to decline.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,     

New energy vehicle:an opportunity for rare earth magnets

<正>Extracted from Securities Guide 1.Popularity of new energy vehicles—an irresistible market trend1.1 Progress of new energy vehicles Chinese Premier Li Keqiang said recently on a visit to Xi'an BYD Autos that new energy vehicles,especially new energy bus,can lessen environment and noise pollution.He encouraged the use of new     

Brief news

正Corun invested another 50 million yuan in power battery for HEV Hunan Corun announced on 27 June that they had signed the cooperation agreement to jointly built Corun(Shaoxing)Autos Power Battery System Co.,Ltd.in Shaoxing Binhai New City.According to the announcement,total registered