复杂镍浸出液萃取净化的研究

以D2EHPA为萃取剂,从钼镍矿的复杂镍浸出液中萃取分离锌、铜。考察了萃取平衡时间、D2EHPA体积浓度、相比(O/A)、料液pH对萃取分离锌、铜效果的影响,确定了D2EHPA萃取锌、铜的最佳条件。室温下萃取除杂的最佳工艺条件为:萃取平衡时间3 min,D2EHPA的体积浓度20%,相比1∶1,料液pH=2.0,一级萃取率锌为89.5%,铜为11.0%。负载有机相经1 mol/L的H2SO4反萃,锌、铜和镍均可完全反萃。经三级逆流萃取可将料液中锌降低到0.01 g/L,萃取率达98.9%。     

从含铜铁锌的酸性溶液中选择性萃取铜

用Lix984作萃取剂，从含铜铁梓的酸性浸出液中选择性萃取铜，结果表明，萃取剂浓度为3%，混合时间为2min，Vo：Va=1:1,pH=2.2时，萃取效果最好，铜萃取率大于96%，铁、锌共萃率低于5%，有机相中无萃取污物产生。反萃试验结果表明，用硫酸溶液反萃取，铜和铁的反萃率随着反萃取剂浓度、反萃相比，反率时间的增大而升高。     

新铜萃取剂萃取盐酸介质中铜的实验研究

采用新铜萃取剂N902对盐酸介质中铜的萃取进行了研究。考察了萃取剂、氢离子、氯离子、铜离子浓度及萃取时间的变化对铜萃取率的影响。结果表明,随着氢离子、氯离子浓度的增加,铜萃取率下降。当铜的浓度达8.5 g.L-1时,用30%的N902萃取盐酸介质中的铜,萃取率可达98.96%。并对不同酸性介质中铜的萃取率进行了比较,发现在硫酸介质中铜的萃取率相对较高。用4 mol.L-1硫酸反萃负载铜有机相,单级反萃率可达86%以上。初步探讨了其萃取机制,用等摩尔系列法确定萃合物的组成为CuR2。     

萃取法从铜阳极泥制备的碲化铜中回收碲

进行了从铜阳极泥中以碲化铜形式富集碲,采用萃取法分离碲硒并回收碲的试验研究。结果表明:以20%TOA+20%仲辛醇+60%磺化煤油(体积分数)为萃取剂、浓度均为2mol/L的H2SO4+HCl为洗涤剂、200g/L的NH4Cl溶液为反萃剂,可实现碲与硒、铜的良好分离;反萃液经SO2或水合肼还原,可得到高纯度的金属碲粉。     

从铜铁锌酸性液中选择性萃取铜

采用Lix984萃取剂 ,对含铜铁锌酸性浸出液进行选择性萃取铜研究。结果表明 ,萃取剂浓度为 3%时 ,铜的萃取率可达到 99% ,且锌和铁共萃率低 ;萃取混合时间 >2min时 ,铜的萃取率达 96 % ,而铁和锌的萃取率 <5 % ;当相比 (O/A)为 1∶1时 ,铜的萃取效果最佳 ;随萃取值的增大 ,铜的萃取率升高 ,但为了避免萃取污物的大量产生 ,应控制萃取pH <2 .5。反萃试验结果表明 ,铜和铁的反萃率随着反萃剂浓度、反萃相比、反萃时间的增大而升高。     

HDEHP和HEH/EHP在硫酸介质中对Y3+的协同萃取及反萃行为研究

对HDEHP(二(2-乙基己基)磷酸或P204)和HEH/EHP(2-乙基己基膦酸单-2-乙基己基酯或P507)在硫酸介质中协同萃取Y3 的行为进行了研究.结果表明,HDEHP和HEH/EHP混合萃取剂萃取Y3 时具有明显的正协同效应,当水相平衡pH=1.2时,HDEHP和HEH/EHP混合萃取体系萃取Y3 的R(协萃系数,下同)为27.86,协萃系数随水相平衡pH的升高而增加,协萃反应式为:Y3 2H2A2(o) H2B2(o) Y(HA2)2(HB2)(o) 3H .另外,对负载Y3 的HDEHP和HEH/EHP混合萃取体系进行了反萃性能研究,结果表明.Y的反萃率随混合体系中HEH/EHP摩尔比的增加而增大;同时比较了相同酸度的HCl,HNO3及H2SO4对同一负载有机相的反萃性能,反萃能力为HCl>HNO3>H2SO4.     

P204从硫酸体系萃取镓性能研究

研究了P204从硫酸体系萃取镓的性能,分别考察了料液酸度、萃取剂浓度、时间、浓度等对镓萃取与反萃的影响并绘制等温线,确定并模拟逆流试验过程。结果表明:料液含0.3g/L Ga^3+,pH=1.2,有机相采用20%P204(体积分数)+磺化煤油,按相比O/A=1∶3,25℃萃取8min,经过3级逆流萃取,镓萃取率可达到99.33%,负载有机相用1.0mol/L H2SO4溶液反萃,按相比O/A=10∶1,反萃温度25℃,反萃时间10min,经过3级逆流反萃,镓反萃率达98.99%,镓浓度富集近30倍。反萃液中的镓经氨水中和沉淀、焙烧后,可得到氧化镓产品。     

从艾萨炉烟尘硫酸浸出液中萃取分离铜锌试验研究

研究了用ZJ988萃取剂从艾萨炉烟尘硫酸浸出液中萃取铜,考察了萃取过程中萃原液酸度、有机相浓度、相比、萃取级数对铜萃取率的影响,以及反萃取过程中硫酸浓度、反萃取相比对铜反萃取率的影响。结果表明:萃原液酸度对铜萃取率影响显著;常温下,在有机相中ZJ988体积分数40%、pH=2.5、Vo/Va=3/1、混合时间5min、5级萃取条件下,铜萃取率达97.35%;用200g/L硫酸溶液作反萃取剂,在Vo/Va=4/1、混合时间3min、4级反萃取条件下,铜反萃取率为95.88%;萃余液为含锌溶液,锌收率为98.26%,可用于回收锌。     

采用HBL101从锌置换渣高酸浸出液中萃取锗

针对现行的湿法炼锌渣中提取锗的研究现状,采用新型萃取剂HBL101从锌置换渣的高酸浸出液中直接萃取锗,考察了料液酸度、萃取剂体积分数、萃取温度、萃取时间和相比对萃取的影响以及氢氧化钠质量浓度、反萃温度、反萃时间和反萃相比对反萃的影响,并对萃取剂转型条件进行了研究.实验表明:有机相组成为30%HBL101+70%磺化煤油(体积分数)作为萃取剂,料液酸度为113.2 g·L-1H₂SO₄,其最佳萃取条件为萃取温度25℃,萃取时间20 min,相比O/A=1∶4.经过五级逆流萃取,锗萃取率达到98.57%.负载有机相用150 g·L-1NaOH溶液可选择性反萃锗得到高纯度锗酸钠溶液,其最佳反萃条件为反萃温度25℃,反萃时间25 min,相比O/A=4∶1.经过五级逆流反萃,反萃率可达到98.1%.反萃锗后负载有机相再用200 g·L-1硫酸溶液反萃共萃的铜并转型,控制反萃温度25℃,反萃时间20 min,O/A=2∶1.经过五级逆流反萃,铜反萃率可达到99.5%并完成转型,萃取剂返回使用.      

用N902萃取废印刷线路板浸出液中的铜

以N902为萃取剂,从废弃印刷线路板氨性浸出液中萃取回收铜,研究萃取剂浓度、相比(O/A)、萃原液初始pH和时间对铜萃取率的影响。结果表明,室温下N902萃取铜最优条件为:萃取剂浓度15%、O/A=1∶2、料液初始pH=10、萃取时间2.5min。在此条件下Cu2+萃取率98.62%,用2mol/L硫酸溶液对负载有机相进行一级反萃4min,Cu2+反萃率达89.91%,其溶液可满足电积提铜的要求。     

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.