硫酸钴浸出液中用N902萃取铜生产试验研究

采用N902对硫酸钴浸出液中铜的萃取进行了研究,考察了萃取相比（O∶A）、萃原液中铜含量、萃取时间对铜萃取率的影响,以及反萃相比（O∶A）、反萃时间、酸度、反萃液铜浓度对铜反萃率的影响,确定了适宜的铜萃取生产条件,当铜离子浓度为6～7g/L时,用15%的N902萃取硫酸介质中的铜,1级铜萃取率可达95%;用新配制的200 g/L的硫酸对负载铜有机相进行循环反萃,1级铜反萃率可达95%。     

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。     

N902萃取铜的选择性研究

对N902萃取剂萃取酸性介质中铜的选择性进行了研究。实验结果表明:在3种酸性介质中,H2SO4介质效果最好。控制水相pH=3,硫酸根离子浓度0.5 mo.lL-1,相比O/A=1∶1。此时βCu/Fe的分离系数最大,而Mg和Ni几乎不萃。再以HCl或H2SO4为反萃剂(根据生产不同铜产品需要),浓度大约在4 mol.L-1左右,铜的反萃率大于93%,而铁几乎不被反萃下来。实现了铜与其他杂质金属的有效分离。     

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。     

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。     

C923萃取铜电解液中砷和铋的试验研究

采用C923萃取铜电解液中的砷和铋,考察萃取剂浓度、酸度、萃取时间和相比等因素对砷萃取率的影响,并探讨原液中氯离子浓度对C923萃取铋的影响。结果表明,在优化工艺条件下,砷的单级萃取率为68.41%,三级错流萃取率为97.00%。氯离子浓度为0.86 g/L时,铋的单级萃取率为95.15%。负载相用水二级错流反萃砷,总反萃率为88.20%,再用酒石酸-氢氧化钠混合液反萃铋,反萃率为81.49%。     

离子液体萃取剂Cyphos IL101从氯化体系中萃取分离铜/镍行为及机制

研究了以离子液体Cyphos IL101为萃取剂从氯化体系中萃取分离铜、镍,考察了溶液酸度、氯离子浓度、萃取剂体积分数、水相pH对铜、镍萃取分离的影响。结果表明:Cyphos IL101能从氯化体系中高效萃取铜,而镍几乎不被萃取;在盐酸浓度3mol/L条件下,萃取分离系数β(Cu/Ni)达49 050.38;铜萃取率随氯离子浓度升高而提高,但不受水相pH影响。分别用硝酸、硫酸和纯水对负载铜有机相进行反萃取,结果表明:硝酸和硫酸对铜的反萃取率均高于90%,而水较难实现反萃取。采用斜率法对萃取机制进行分析,结果表明:Cyphos IL101通过氯阴离子交换与铜以物质的量比1∶1进行萃取,萃取产物为R3R’PCuCl_3。水相和有机相的UV-Vis光谱、Raman光谱及XPS能谱分析结果表明,氯化体系中,[CuCl_4]~(2-)为有效萃合物结构。由于优良的离子交换萃取性能,Cyphos IL101有望成为一种新型高效分离铜镍的优良萃取剂。     

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。     

硫磷混酸体系中钒的萃取实验研究

以某高磷钒矿直接活化硫酸浸出并经预净化的溶液作为研究对象,用N263进行萃取反萃后经过直接沉钒,制得V2O5产品.实验主要研究了水相平衡pH、萃取剂浓度、添加剂浓度、相比、逆流萃取及反萃级数对硫磷混酸体系中钒萃取率的影响.实验确定了N263最佳萃取工艺条件:有机相浓度取15%N263-5%仲辛醇-磺化煤油,O/A=1:3,常温振荡10 min,常温静置10 min,萃取平衡pH=2,经5级逆流萃取,钒的萃取率可达99.51%;最佳反萃工艺条件:反萃剂浓度取1 mol·L-1 NH4 OH4 mol·L-1 NaCl,O/A=3:1,常温振荡10 min,常温静置10 min,反萃平衡pH=8.5,经4级逆流反萃,钒的反萃率可达99.58%;经直接沉钒所得V2O5产品质量达到99.54%,符合GB3283-87V2O598质量要求.     

钴镍渣综合回收后结晶母液萃取回收铜研究

介绍了株洲冶炼集团股份有限公司二段净化渣选择性分离锌、浸出液结晶铜后的结晶母液采用30%CP-150+70%煤油萃取剂体系萃取铜,用3 mol/L硫酸作为反萃剂,铜的萃取率为99.68%(二级),铜的反萃率为98.01%。     

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.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.