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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。 相似文献
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地浸采铀工艺中氯离子的作用及其影响 总被引:2,自引:0,他引:2
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。 相似文献
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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 相似文献
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《铀矿冶》1997,(2)
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… 相似文献
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用树脂回收铀矿石细菌浸出液中铀的试验研究 总被引:1,自引:0,他引:1
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。 相似文献
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《中国稀土信息(英文版)》2014,(11)
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 相似文献
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《中国稀土信息(英文版)》2014,(8)
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 相似文献
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《中国稀土信息(英文版)》2014,(7)
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, 相似文献
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Ye Peipei 《中国稀土信息(英文版)》2014,(7)
<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 相似文献
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针对煤矿开采深度不断向深部延伸,掘进巷道受深部高应力的影响越来越大,巷道围岩整体稳定性差,矿山压力显现越剧烈现象,一般锚网喷加锚索支护无法从根本上控制巷道的变形。总结了平煤股份十三矿-685 m进风大巷注浆加固技术,依据对巷道掘进之后变形监测数据的采集,对巷道变形机理进行分析研究,并对注浆时段进行了合理选择,在对巷道的注浆工艺进行了充分论证的基础上,对巷道进行了注浆。注浆后效果表明:巷道滞后注浆时间段的选择非常重要,巷道在恰当的时间内进行注浆加固施工,能有效控制巷道的变形,巷道注浆后变形量明显减小,岩体的稳定性明显增强,减少了巷道日常维修工作,降低了矿井的生产成本,保障了矿井的安全生产。 相似文献
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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. 相似文献
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《中国稀土信息(英文版)》2014,(12)
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. 相似文献
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《中国稀土信息(英文版)》2014,(10)
<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 相似文献
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《中国稀土信息(英文版)》2014,(8)
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. 相似文献
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<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 相似文献