普通级氧化镧提纯新工艺研究

采用树脂交换法制备超高纯氧化镧,树脂吸附及分离过程是技术难点之一。以稀土分离厂生产的普通级氯化镧(La_2O_3/ΣREO≈99%～99.999%)为原料,利用树脂交换法进行提纯研究,重点研究料液浓度、纯度,以及淋洗液在树脂柱中流速、pH、浓度、反应温度、压力等条件对提纯工作的影响因素,且获得较好的料液提纯指标:树脂的吸附率达到88.60%、分离效率为96.56%;提纯的料液再经沉淀、煅烧后,可获得目标高纯产品氧化镧,纯度达99.99995%。该技术方法具有工艺设备简单、成本低、投资省等优势,不仅为规模化生产提供科学支撑,也为其它稀土元素的提纯工作提供了参考。     

PAIV萃淋树脂色层柱富集微量钕的研究

研究了 PAIV萃淋树脂色层柱在钕浓度 0 .414× 10 - 6 、2 5～ 30 m L溶液中对钕的吸附 ,选择含有草酸或EDTA的稀硝酸溶液进行淋洗 ,可以使钕富集近 4倍 ,用分光光度法测定淋洗液钕含量 ,回收率为 10 3.1%     

CL-P204萃淋树脂色谱分离-控制气氛光谱法测定高纯氧化钐中十一种稀土杂质

用CL-P204萃淋树脂作为萃取床对氧化衫中轻重稀土尤其是钕、铕的分离进行了盐酸浓度、稀土负载量和温度的影响试验。当柱径为20毫米、长径比为49、稀土载量为饱和量的0.87％、温度为40℃时,用1N盐酸溶液淋洗,使钕-钐和钐-铕获得了满意的分离。试验了富集样中钐含量以及非稀土硅、钙、铝和铁对谱线强度的影响。建立了色谱分离-控制气氛光谱法测定高纯氧化钐中从镧到铒和钇等杂质的分析方法。各被测元素的测定回收率为74～105％。测定下限达0.0n～0.nppm。相对标准偏差不超过±17％。本方法可满足99.999％纯度氧化钐中+一种稀土元素的分析。     

萃取色层法净化钴溶液制备高纯钴的研究

高纯钴盐溶液的净化是制备高纯金属钴的关键,钴与镍的深度分离是制备高纯钴盐溶液的核心技术之一。采用HPD-100苯乙烯-二乙烯基苯大孔吸附树脂和P507萃取剂制备的P507萃淋树脂净化硫酸钴溶液,研究了萃淋树脂的萃取容量以及萃取pH值、淋洗pH值、流出体积等因素对镍钴的分离效果的影响。研究表明:在Φ65 mm×700 mm色层柱中采用含55%P507的萃淋树脂,控制萃取pH值3.7,缓冲溶液淋洗pH值2.98的条件下净化硫酸钴溶液,溶液流速为1.0～1.5个色层柱空体积/h,当淋出液体积为色层柱空体积的3倍时收集淋出液,并用pH 1.0的盐酸反萃,得到高纯氯化钴溶液。将该溶液除去夹杂的有机物,浓缩后进行电解,得到高纯钴经GDMS检测20个杂质元素总含量小于10×10-6%。萃取色层法净化后的溶液,满足制备高纯钴的要求。     

改性树脂CB-ACT富集离子型稀土矿浸出液实验研究

在Φ15 mm×130 mm吸附柱中,利用改性树脂CB-ACT对离子型稀土矿浸出液中RE3+和Al3+进行动态吸附实验研究,考察料液初始浓度、料液流速、吸附温度等因素对改性树脂CB-ACT吸附RE3+和Al3+的动态吸附曲线的影响.结果表明:动态吸附的最佳条件为料液初始浓度4 g/L、料液流速4 mL/min、吸附温度308 K,在该工艺条件下,改性树脂CB-ACT对RE3+和Al3+吸附效果较好.其次,使用0.8 mol/L的M（OH）_n溶液对饱和吸附树脂进行淋洗,可选择性的将树脂上吸附的Al3+洗脱下来,与RE3+分离.在较好的淋洗工艺条件下,解吸液中Al₂O₃/REO的比值可低至0.34 %,稀土中的铝已基本去除.      

用P_(507)萃取色谱法分离镝、钬、铒的研究

本文用萃取色谱法,以P_(507)萃淋树脂为固定相,HCl溶液为流动相。讨论了不同酸度、流速、料液组成、料液浓度、负载量、柱型及阴离子添加剂对Dy、Ho、Er分离的影响,并对不同酸度的淋洗效果作了重点分析。     

萃取色层法分离铽镝研究

采用P₅₀₇萃淋树脂萃取色层法以Tb、Dy富集物作原料,研究了淋洗液酸度、柱径比、淋洗速度、稀土负载量以及原料中Tb、Dy含量对Tb、Dy分离的影响。并根据研究结果,选出较佳的分离工艺条件进行了多次综合条件试验,试验结果表明:一次分离可分别获得纯度>99.9 5%的髙纯Tb₄O₇和Dy₂O₃, 平均实收率分别为89.62%和87.63%。      

CL-P507-HCl体系萃取色层法分离铒、铥、镱

研究了用CL-P507-HCl体系萃取色层法分离铒、铥、镱,考察了树脂粒度、溶液温度、淋洗液酸度、树脂负载量、进样质量比等条件对分离效果的影响.结果表明,铥、镱之间存在着萃取抑制现象;以1.65 mol/L盐酸淋洗铒,1.90 mol/L盐酸淋洗铥和镱,在溶液温度50 ℃时可实现3者的分离;以99.9%氧化铥为原料,单柱一次分离可获得高纯铥溶液.     

P507煤油萃取剂体系溶解碳酸镨钕研究

为简化离子型稀土矿提取稀土工艺,采用离子交换树脂富集矿山浸出母液技术制备高纯碳酸稀土用于有机溶料,系统考察了P507煤油萃取剂体系溶解碳酸镨钕过程中,碳酸镨钕预处理方式、碳酸镨钕加入量、水相pH、杂质铝含量、反应时间和相比等因素对萃取效果的影响。结果表明,以湿碳酸镨钕为原料,其加入量控制为有机相负载稀土浓度0.16~0.18 mol/L,水相pH=2.0~3.0,相比O/A=1,反应时间12 min,碳酸镨钕中的铝含量小于2.5%,30 ℃条件下,碳酸镨钕溶解完全,分相效果好,有机相中稀土浓度达0.177 1 mol/L,萃取率为98.13%。采用4级逆流连续萃取试验,经16次反应平衡后有机相出口级稀土浓度为0.166 8 mol/L,水相出口稀土浓度为0.001 1 mol/L。采用P507-煤油萃取剂体系溶解碳酸镨钕同步实现了空白有机相的皂化及萃取过程,碳酸稀土直接作为原料省略了酸分解工序,缩短了工艺流程,同时用作皂化剂,降低了化工材料消耗、废水排放量及环保成本,为简化稀土萃取分离提供了应用基础。     

CL-P204萃淋树脂分离稀土的研究

用萃淋树脂CL-P204作为萃取色层的固定相研究了淋洗液HCl酸度(1.5～1.9N),流速(0.65～1.05ml/cm~2·min),负载量(占饱和吸附量的0.65％、1.3％与1.95％)与柱长径比L/φ(17、37)对相邻稀土元素铽与镝分离的影响。用log D对log[H~+]作图得一组直线,其斜率～3。说明萃淋树脂上的P204萃取稀土时一个稀土离子置换三个氢离子。饱和吸附量法测得树脂上的P204与稀土形成的络合物的克分子比是3:1。其反应式可能是:Ln_(+3)+1.5(H_2A_2)=LnA_3+3H~+。     

Acceleration of Electricity Reform Brings Benefit to Big Electricity Users,Aluminum Manufacturers Can Save Costs Up to Several Hundred Million

<正>Recently the National Commission of Development and Reform again assembled experts to solicit opinions,and discussed new electricity reform program.According to information disclosed by experts attending the meeting,in the future electricity reform will undergo top-down design,possibly a     

Qinghai's Aluminum Processing Capacity to Rise at the End of the Year

正Since the release of Implementation Opinions on Carrying out‘Guiding Opinions of the State Council on Resolving Serious Production Overcapacity Conflicts’,according to the actual situation of industry,Qinghai has focused on electrolytic aluminum,cement,ironsteel(including iron alloy and silicon carbide),     

Recent Trends in China's Copper Scrap Market-Part Ⅱ

<正>2.Tianjin Scrap Metal Market In Tianjin,we mainly visited Jinghai Ziy Town scrap market and Binhai New Area’some copper scrap enterprises and enterprise using copper scrap.In Ziya we felt the coppe scrap market was particularly deserted,mos copper scrap enterprises in the town wer closed,industry insiders said in 2012 the plac here was bustling with activity.According to     

Shanghai Clearing House to Roll out Renminbi-denominated Copper Clearing Operations in Free Trade Zone

正Clearing House Financial Markets Co.,Ltd.(Shanghai Clearing House)General Manager Xie Zhong told the media recently at the briefing of the international symposium of"Reform Deepening and Mechanism Innovation of the Post-crisis Kerb Market",Shanghai Clearing House will explore the feasibility of carrying out bond business in     

Development and Application of New Materials for Copper Processing in China

正After over 60 years of developmnt,a system for RD and production of copper processing materials has already taken shape in China.After the reform and opening-up,the application of copper processing materials has gradually expanded from the military industry to civil field.The annual output of copper     

China’s Mineral Exploration Market Downturn Causes Decline of Investment in Bauxite

<正>According to a survey report conducted recently by China Geological Survey Development Research Center,in the first half of 2014,China’s mineral exploration market continued to decline,with the investment in exploration of non-fuel minerals dropping by13.7%and drilling workload dropping by21.7%.According to statistical analysis of the Center,     

Fabricated Copper Production by Province or City in 2014

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Zinc Production by Province in 2014

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China's Aluminum Alloy Cable Market has Taken Shape

正Aluminum alloy cable is a mature product and technology that has been used for nearly fifty years in the U.S.Through six years’promotion,it has been widely recognized and accepted in the China market since 2013,which laid the foundation for the development of the aluminum alloy cable market.Aluminum alloy cable is widely applied in the fields of civil construction and industrial and mining enterprises,especially in real estate,steel and metallurgy.     

Qinghai to Build a 100 Billion Yuan Lithium Industry Base

正At 2014 China Qinghai Trade Fair for Green Development Investment,Qinghai EV Rally2014 was introduced for the first time.With electrical vehicles’eco-friendly features,Qinghai manifested its determination on green development.Introducing Qinghai EV Rally was just a signal.By leveraging its rich salt lake resources