新型大孔膦酸浸渍树脂萃取色层分离重稀土的研究

研究了用浸渍Cyanex272的大孔磷酸树脂萃取色层分离重稀土Tm-Yb,Yb-Lu。结果表明,在淋洗液酸度2．5mol/L,稀土负载量1%,柱高径比30：1,淋洗流速1mL/min时,Yb,Lu分离效果较好；在淋洗液酸度1．8mol/L,稀土负载量0．8%～0．9%,柱高径比30：1,淋洗流速1mL/min时,Tm,Yb的分离效果较好。与使用P507萃淋树脂萃取色层分离相比,淋洗液酸度较低,而且可以减少梯度淋洗,减轻了后处理工序的生产强度,降低生产成本,对工业应用很有价值。     

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。     

加温加压离子交换法制取激光晶体级Ho2O3、Er2O3、Tm2O3、Yb2O3、Lu2O3工艺要点

阐述了加温加压离子交换分离技术的基本特点及其在研制高纯激光晶体级稀土氧化物上的优越性：介绍了采用微米级阳离子交换树脂加温加压离子交换制取大于99．999％Ho2O3、Er2O3、Tm2O3、Yb2O3、Lu2O3的基本工艺流程;探讨了淋洗剂、阻滞离子、柱比、柱组合的确定。     

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.     

双萃取剂浸渍树脂色层分离硫酸体系中镍钴的研究

目前分离镍钴最主要的方法是溶剂萃取法,但是对于高镍低钴溶液,溶剂萃取法不能取得高效而经济的分离效果。研究采用HZ818苯乙烯二乙烯基苯大孔树脂和P507,Cyanex 272萃取剂自制双萃取剂浸渍树脂,利用萃取剂的协同作用和树脂色层萃取的高分离级数分离硫酸体系中的Ni~(2+)和Co~(2+),考察了树脂的萃取容量、萃取温度、萃取pH值、淋洗温度、淋洗pH值以及淋洗速度等因素对镍钴分离效果的影响。研究表明:在Φ20 mm×200 mm的色层柱中,选用一定浓度的HAc-NaAc作为缓冲体系,控制料液pH值为4.8,以5.0 ml·min~(-1)的进料流速能取得较好的吸附效果;控制温度为28℃,淋洗流速为5.0 ml·min~(-1),用pH为4.0的HAc-NaAc缓冲溶液淋洗Ni~(2+),当淋出体积为200 ml时,改用pH 1.0的硫酸淋洗Co~(2+),并收集淋出液,得到净化的硫酸钴溶液。     

P507萃淋树脂提取高纯氧化镝的研究

以Ｐ５０７萃淋树脂为萃取色层的固定相、盐酸为流动相，在Φ×Ｌ＝１３ｍＭ×６４ｍｍ柱中，分别研究了洗液酸度、流速、稀土负载量和温度对稀土元素铽、镝、钬分离的影响，从而初步确定了从Ｔｂ－Ｄｙ－Ｈｏ混合料液中提取高纯镝的适宜工艺条件。     

CL－5709萃淋树脂色层分离重稀土元素

本文研究了用ＣＬ－５７０９萃淋树脂－梯度淋洗技术色层分离Ｄｙ、Ｈｏ、Ｅｒ。研究表明，淋洗液酸度、工作温度、色层柱高度及淋洗速度对分离效果有重要影响。实验得出了使Ｄｙ、Ｈｏ、Ｅｒ互相分离的最适合的工艺参数。利用该条件可以有效地分离不含钇的Ｄｙ、Ｈｏ、Ｅｒ混合物，还用红外光谱研究了萃淋树脂吸附稀土离子的机理。     

氨基膦酸螯合树脂离子交换色层法分离重稀土的研究

采用离子交换色层法用氨基膦酸螯合树脂对重稀土铥、镱、镥富集物进行动态吸附和淋洗分离研究,考察了淋洗剂浓度、酸度、淋洗液流速、温度等因素对分离的影响。结果表明,在吸附柱中,以0.1mL/(cm2.min)的流速进料时能得到较大的吸附率;在淋洗液流速为0.3mL/(cm2.min)、温度30℃的条件下,用pH=8.0、浓度0.02mol/L的EDTA淋洗重稀土富集物,可实现铥、镱、镥三者的完全分离。     

HEDTA离子交换色层法分离重稀土

用2-羟乙基乙二胺三乙酸(HEDTA)作为淋洗剂,通过离子交换色层法分离重稀土元素钬和镥,研究室温条件下(25℃)淋洗剂的浓度、酸度、流速、柱比(吸附柱长度与分离柱长度的比值)等对钬、镥分离效果的影响.通过ICP-AES测定淋洗液浓度,绘制淋洗曲线,根据曲线中交叉区大小判断分离效果.结果表明:淋洗液的酸度是影响重稀土分离的关键因素,酸度越高,钬、镥分离效果越好,但分离周期越长;在一定范围内柱比越大,钬、镥分离效果越好,但柱比高于1:6时,分离效果下降.以钬、镥分离工艺进行镱、镥分离,也可以得到满意的分离效果.     

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~+。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.