用溶剂萃取—沉淀法从废锂离子电池正极材料中回收钴镍锂

采用溶剂萃取—化学沉淀法从废锂离子电池正极材料中回收硫酸钴、氢氧化镍和氟化锂,比较了萃取剂P507和Cyanex272对钴、镍的萃取分离性能。试验结果表明:1-1-1型废锂离子电池正极材料浸出液经P204除锰后,用0.5 mol/L P507或0.6 mol/L Cyanex272经两级错流萃取钴,钴萃取率分别为98.21%和99.44%,镍共萃取率分别为24.42%和4.26%,锂共萃取率分别为15.84%和5.11%,Cyanex272对钴镍的萃取分离性能明显优于P507;P507和Cyanex272负载有机相分别用CoSO_4溶液和HAc-NaAc溶液洗脱共萃取的镍和锂,然后用硫酸反萃取钴,反萃取液中Co/Ni质量比分别为3 217(P507)和12 643(Cyanex272),蒸发结晶可得高纯硫酸钴;萃余液中的镍、锂分别用NaOH和HF沉淀,可得氢氧化镍和氟化锂固体。采用此方法,废锂离子电池正极材料中的钴、镍、锂都得到有效回收。     

从镍氢电池正极酸浸液中萃取分离镍钻

考察了萃取剂用量、萃取剂皂化率、相比、萃取时间及pH等因素对从镍氢电池正极酸浸液中萃取分离钴镍的影响。试验结果表明:以8%Cyanex272+92%煤油为萃取剂,在pH=5.0、有机相皂化率70%、Vo∶Va=1∶1、萃取时间3min、温度25℃条件下,钴萃取率达90%左右,Ni萃取率只有1%左右,二者分离效果较好,工艺运行稳定。     

P507分馏萃取分离钴镍的研究

高钴低镍原料用P507分馏萃取分离钴镍,萃取段5级,洗涤段5级,硫酸介质。串级模拟实验结果:可获得含镍小于0.03%的高纯钴有机相和含钴小于0.03%的高纯镍水相,钴、镍的收率均大于99.9%。     

用N.M.C.法分离钴和镍

用2-乙基-1-己基磷酸单2-乙基-1-己基脂(M2EHPA)从硫酸镍溶液中分离钴的方法进行了研究。M2EHPA的分离系数比D2EHPA大很多倍(D2EHPA是熟知的一种阳离子交换萃取剂)。 使用3级混合澄清装置,将含20％(体积)M2EHPA的有机试剂与含30克/升镍和12克/升钴的原始水溶液接触后,能获得这样的结果:萃余相含29.9克/升镍和0.002克/升钴,萃取相含0.14克/升镍和12克/升钴。将萃取相与含有CoSO_4的洗涤液混合,能有效地从有机相中除掉镍;与稀硫酸溶液接触很容易从有机相中反萃取出钴。在工业性设备中,是使用钴电解工序的废电解液作为反萃取液。使用N.M.C.法,反萃取液中的钴浓度被控制在100克/升左右。 根据本研究的结果,建立了一种分离钴和镍的方法。日本矿业公司利用这种方法,目前已能有效地分别生产出1300吨/年和3300吨/年高纯的钴和镍。     

从含锰钴镍浸出液中萃取回收锰

采用P204作为萃取剂,磺化煤油为稀释剂,从锰钴镍溶液中二级萃取分离锰,有机相反萃取富集锰,考察各因素对锰萃取率及分离系数的影响并确定最优条件。结果表明,在室温下,一级萃取相比O/A=2.5,P204含量30%,pH=3.5,皂化率30%,锰萃取率为62.39%;二级萃取在P204含量30%,皂化率30%,O/A=2,锰的总萃取率达98.06%,锰与钴、镍分离系数分别为90.11、92.33。萃取液经硫酸反萃洗钴镍,按相比O/A=10,酸度70 g/L,可洗去85%以上的钴和镍。洗钴镍后液经硫酸反萃锰,按相比O/A=4,酸度110 g/L,可反萃98.27%的锰,反萃液钴、镍的浓度小于0.5 g/L。     

多金属结核氨浸液中镍钴铜的萃取分离

采用LIX84从氨性溶液中萃取分离镍、钴、铜。首先采用 5级逆流共萃铜、镍 ,钴留在萃余液中 ,含铜、镍的负载有机相经二级洗涤氨 ;用镍电解废液进行 7级逆流选择性反萃镍 ,实现镍与铜的初步分离 ;然后从含铜有机相中反萃铜得到纯净的硫酸铜溶液 ,选择性反萃镍得到含有少量铜的粗镍液 ,该液仍采用LIX84萃取脱铜 ,并回收铜 ,从而将铜、镍彻底分离 ,实现了用一种萃取剂分离氨浸液中的镍、钴、铜。联动连续运转试验结果表明 ,采用本研究确定的萃取工艺流程和萃取设备处理氨浸液 ,萃取分离效果好 ,试验结果稳定、可靠。金属回收率高 ,萃取回收率分别为 ( %) :Ni 99 0 ,Co 99 7,Cu 99 9。     

二氧化硫氨浸及溶剂萃取钴壳

钴壳用二氧化硫气体作还原剂进行了氨浸,研究了浸出时间,浸出温度和碳酸铵浓度对镍、钴、铜、铁和锰浸出的影响,二氧化硫作还原剂,用碳酸铵溶液可实现从钴壳中选择性浸出镍,钴 和铜,在适当的浸出条件下,金属元素的浸出率分别为Ni90%,Co97%,Cu93%,Fe1.8%和Mn6.0%。使用溶剂萃取从碳酸铵溶液中分离镍、钴和铜,萃取试验用LIX－84作萃取剂,铜和镍的萃取率在99％以上,钴则在1．0％以下,钴的萃取被亚硫酸盐离子遮蔽,含有镍和铜的有机相用稀硫酸或盐酸在pH=1.7时反萃镍,pH=0时反萃铜。     

Versatic10萃取分离微生物浸出液中钙镁和低含量镍钴

以Versatic10为萃取剂从含镍、钴、钙、镁离子的合成硫酸盐溶液中萃取分离镍、钴离子。在25℃、振荡强度200r/min、振荡时间4 min的条件下,Versatic10萃取镍、钴离子的最佳条件为:初始pH2.5、相比O/A=1/3、皂化率60%。用去离子水(pH=6.50)对负载有机相按相比O/A=1/1洗涤2次,钙、镁离子的共萃率均可降至0.5%以下。用2mol/L硫酸按相比O/A=1/1反萃时,镍、钴的反萃率均在99%以上。     

反向胶束对Cyanex272分离钴镍的影响

Ｅ .Ｌｉｎｄｅｌｌ等人研究了用Ｃｙａｎｅｘ2 72作萃取剂、以异辛烷或Ｄ 70作稀释剂、以氨水作中和剂 ,从硫酸盐水溶液中萃取钴镍的动力学和选择性。萃取试验在强搅拌直流柱式反应器中进行。当氨与萃取剂的量比为 1∶1时 ,用浓氨水预中和可形成均相溶液。接触时间在 2～ 90ｓ内相分离较快 ,钴镍的萃取动力学速度也非常快。在最初的 1 0ｓ内 ,约 90 %的金属被萃取到有机相中。较快的萃取动力学归因于预中和萃取剂的胶束特性 ,而与中和度无关。在相接触的瞬间 ,当少量钴镍被萃取时 ,有机相中形成内含水、金属离子和氨的反向胶束。随着接触时…     

P507萃取分离镍钴工艺研究

以湿法工艺处理镍基高温合金废料过程中产生的镍钴净化富集溶液为原料,以P507为萃取剂,使用连续化逆流萃取分离设备——混合澄清槽,采用"P507六级萃取钴—六级洗涤—四级反萃"连续萃取工艺,获得了镍富集溶液和钴富集溶液,其中镍富集液中镍钴浓度比达8 000、钴富集液中钴镍浓度比达12 576,实现了镍钴的有效分离。     

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.