从印尼含镍红土矿中浸出镍、钴工艺试验研究

印尼某含镍红土矿属低镁褐铁矿型,镍主要赋存于褐铁矿中。研究了采用还原焙烧-氨浸、直接氨浸、加压酸浸、直接酸浸—沉矾除铁等工艺从红土矿中浸出镍和钴。结果表明:采用氨浸工艺,镍、钴浸出率较低;采用直接酸浸—沉矾除铁工艺,镍、钴浸出率均在80%~90%,而且浸出矿浆的过滤性能良好;采用加压酸浸工艺,镍、钴浸出率在90%以上。     

钴冰镍常压浸出工艺研究

以镍转炉渣还原硫化熔炼得到的钴冰镍为原料,在常压下于硫酸体系中进行浸出,考察了硫酸浓度、液固比、浸出时间及浸出温度对钴冰镍中有价成分浸出率的影响。结果表明,液固比和硫酸浓度对钴、镍、铁的浸出率影响较大。当硫酸浓度为1.6mol/L、液固比5、浸出时间2.5h、浸出温度85℃时,铁浸出率达到69%,镍、钴浸出率分别控制在1%和5%以内,取得了很好的选择性浸出效果。     

废镍氢电池中镍、钴和稀土金属回收工艺研究

介绍了湿法处理工艺对废镍氢电池中镍、钴、稀土(RE)金属的回收,考察了浸出时间、液固比、硫酸初始浓度及浸出温度等因素对镍、钴、稀土浸出率的影响;溶液pH、无水硫酸钠与浸出液中RE3+的摩尔比、反应温度等因素对稀土回收率的影响。通过正交试验确定了镍、钴、稀土在稀硫酸中的优化浸出条件以及产生稀土复盐沉淀的优化沉淀条件。实验结果表明,优化硫酸浸出条件为:浸出时间为3.8h,液固比为15,硫酸初始浓度为1.8mol·L-1,浸出温度80℃。在优化浸出条件下,镍的浸出率达96.8%,钴的浸出率达97.3%,稀土的浸出率达94.6%。稀土复盐的优化沉淀条件为:溶液pH为2.0,无水硫酸钠与浸出液中RE3+的摩尔比为4,反应温度为60℃。在此条件下,RE回收率为96.7%。     

从废高温镍钴合金中浸出镍和钴的试验研究

研究了采用"苏打焙烧-碱浸出铝、钼-氯气浸出钴、镍、铁等-TBP萃取除铁-中和水解除铬-P204萃取除微量杂质-N235萃取分离镍、钴"工艺处理废高温镍钴合金,重点考察了从废镍钴合金中浸出镍和钴,讨论了苏打焙烧温度和碱浓度对铝、钼浸出率的影响,碱浸渣氯气浸出电位、浸出时间、废合金粒度、添加剂的加入等因素对镍、钴浸出率的影响.试验确定了从废高温镍钴合金中浸出镍、钴的工艺优化条件.综合条件下,镍、钴平均浸出率分别为99.30%和97.67%,浸出渣中镍、钴质量分数平均为0.51%和0.44%.     

褐铁型红土镍矿活化预处理后选择性浸出镍钴

以褐铁型红土镍矿为原料,研究了其活化预处理后镍、钴和铁的选择性浸出。考察了温度、时间、液固比、搅拌转速及氟化钠加入量对金属浸出效果的影响,得出最佳工艺条件为:温度85℃、浸出时间3h、液固比5∶1(mL/g)、搅拌速度400r/min及NaF添加量4%,镍、钴浸出率高达85.62%和94.26%,铁以黄钠铁矾的形式进入渣相,浸出率低至2.43%。活化预处理可以实现褐铁型红土镍矿中镍、钴和铁的选择性浸出。     

粗制氢氧化镍钴（MHP）两段浸出工艺研究

为了更高效地从粗制氢氧化镍钴中浸出镍、钴,采用两段浸出工艺,以瑞木粗制氢氧化镍钴为原料浸出镍、钴,考察一段浸出pH、温度、浸出时间,以及二段浸出硫酸加入量和时间对镍、钴、锰浸出效果的影响。研究得出：在一段浸出温度70 ℃,pH=2.0~2.5,浸出时间1.5 h,二段浸出硫酸加入量为一段硫酸加入量的50%~70%的条件下,镍、钴浸出效果最好,分别可以达到100%和98.99%,锰的浸出率可以抑制在36.82%,此时渣率为5.32%,渣中钴和锰元素含量分别为0.71%和55.55%,两段总的酸耗在760 kg/t左右。根据小试条件进行300 kg/d连续扩大试验,结果可以达到小试的浸出效果。     

镍精矿加压酸浸新工艺研究

研究了金川镍精矿加压一步全浸镍、钴、铜新工艺,浸出液中和除铜后萃取分离镍钴,镍、钴、铜的浸出率可分别达到99.5%、98%和98%以上。该工艺与硫酸选择性浸出相比具有金属浸出率高、分离彻底、易分别回收等优点。     

生物浸出低品位镍铜硫化矿

阐述了氧化亚铁硫杆菌 (TF5)和氧化硫硫杆菌 (TT)浸出金川低品位镍铜硫化矿的机理、过程动力学、工艺条件和反应工程。研究表明 ,含镍磁黄铁矿的细菌浸出以细菌氧化生成的Fe3 +的作用为主 ,浸出速率受表面反应控制 ;镍黄铁矿的细菌浸出以矿物表面吸附菌的作用为主。细菌对Mg2 +离子的耐受浓度因驯化而提高 ,极限浓度可达 15～ 2 0g/L。低品位镍铜矿的细菌浸出过程中 ,pH控制、细菌的初始接种量、矿浆浓度及TF和TT的混合比是影响镍、铜、钴等有价金属元素浸出速率和最终浸出率的主要因素。优化条件下气升式和搅拌式反应器中试验表明 ,优化条件下 ,在生物浸出低品位镍铜硫化矿 ,镍浸出率可达到 92 %～ 94 % ,铜达 4 8%～ 50 % ,钴达 88%～ 91%。     

从高镍锍中选择性回收镍的试验研究

高镍锍-硫酸选择性浸出工艺包括常压浸出和加压浸出.通过浸出,Ni、Co转入溶液而Fe、Cu等杂质富集在浸出渣中.与镍同时浸出的钴用Cyanex272溶剂萃取分离或用黑镍去除,最终得到纯净的硫酸镍溶液,可用于生产硫酸镍或电积镍.     

从软锰矿酸浸沉淀渣中回收钴镍

以软锰矿酸浸工艺中除杂产生的二甲基二硫代氨基甲酸盐沉淀为原料,在酸性条件下利用硝酸钠氧化浸出钴和镍。考察硝酸钠用量、硫酸浓度、反应温度和时间等因素对钴和镍浸出效果的影响。结果表明,在硝酸钠用量35.0g/L,硫酸浓度1.84mol/L,50℃浸出3h的条件下,钴和镍的浸出率分别达到96%和94%。     

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.