从冶锌工业废渣中提取镓和铟

以P204和TBP作萃取剂,建立了从冶锌废渣中同时提取镓和铟的新工艺。在大于1mol/L酸度条件下,用P204-煤油作萃取剂实现了镓和铟萃取分离。经三级萃取后,铟的提取率达到99%以上,镓的萃取率小于1%。在大于4mol/L酸度条件下,用TBP-煤油作萃取剂可使镓的提取率接近100%,TBP有机相用1.5mol/L氯化铵溶液反萃,镓的反萃率可达99%以上。该提取工艺操作简单,可实现同时提取工业废渣中的镓和铟。     

从冶锌工业废渣中提取镓和铟

以P204和TBP作萃取剂,建立了从冶锌废渣中同时提取镓和铟的新工艺。在大于1mol/L酸度条件下,用P204-煤油作萃取剂实现了镓和铟萃取分离。经三级萃取后,铟的提取率达到99%以上,镓的萃取率小于1%。在大于4mol/L酸度条件下,用TBP-煤油作萃取剂可使镓的提取率接近100%,TBP有机相用1.5mol/L氯化铵溶液反萃,镓的反萃率可达99%以上。该提取工艺操作简单,可实现同时提取工业废渣中的镓和铟。     

采用P204+YW100萃取工艺制备镓精矿的生产应用

介绍了国内某锌冶炼厂采用P204+YW100协同萃取体系从硫酸浸出液中萃取制备镓精矿的生产情况,针对萃取-反萃-硫化除杂-中和水解沉淀工艺中存在的不足进行分析,提出了如下措施：稳定控制萃取料液含酸量在10～20 g/L,降低溶液中铁离子浓度至≤0.2 g/L,优化协萃剂YW100的加入方式,由间断补加改为连续补加;采用扩散渗析技术分离镓反萃液中的游离酸;强化萃取源头控制,减少杂质元素进入反萃液,取消硫化除杂工艺,由氢氧化钠替代碳酸钠作为中和剂。结果表明,经过工艺优化后,镓萃取率由低于75%提高至大于99%;高酸镓反萃液采用扩散渗析膜处理工艺,渗析残液中铁、铜、锌、镓、硫酸截留率分别为85.71%、87.27%、90.00%、90.54%、9.71%,酸的回收利用率达到了90.29%,回收酸配入浓硫酸作为镓的反萃剂,实现了资源的循环利用;镓精矿中的镓品位由原来的8.51%提高至26.47%,为后续碱溶-镓电积提供高质量原料。     

攀钢V2O5弃渣中金属镓的提取研究

阐述了以攀枝花钒钛磁铁矿经提取Ｖ２Ｏ５后的弃渣为原料，采取还原熔炼，铁电解，酸浸，萃取，镓电解等工艺过程，可生产金属镓及电解纯铁产品，该工艺流程的试验成功为含铁矿撮金属镓创出一条新路。     

用Kelex100由高碱度铝酸钠溶液中萃取镓

用Ｋｅｌｅｘ１００从高碱度铝酸钠溶液中萃取回收镓，反萃获得的含镓液经适当处理后电解得纯度为９９．９９％金属镓。萃取体系引入加速剂后可以加快萃取速率。     

用TBP从高酸度盐酸溶液中萃取分离镓

系统研究了以TBP为萃取剂，乙酸丁酯，二甲苯，石油醚，煤油为稀释剂，从高酸度盐酸溶液中萃取镓。试验结果表明，TBP与上述稀释剂组成的有机相对镓均有良好的萃取性能，萃取率与溶液中酸的逍度，有机相中TBP体积分数及共存离子浓度有关，萃取过程属于离子缔合交换机理。     

从镓-锗精矿中回收镓的试验研究

研究了从镓-锗精矿中回收镓,考察了浸出温度、浸出时间对盐酸浸出镓的影响以及浸出液酸度、萃取次数、相比对镓萃取率的影响。结果表明:用7.95mol/L工业盐酸,在75℃下浸出镓-锗精矿2.5h,镓浸出率在93%以上;调节浸出液酸度,用磷酸三丁酯-260#溶剂油在1∶1相比条件下萃取镓,负载有机相用20g/LNaOH溶液反萃取,反萃取液用300g/L NaOH溶液调至碱性后电解,镓回收率达92%以上。     

在有表面活性剂存在下,用Kelex 100从拜耳工艺溶液中液液萃取镓

ＰｕｖｖａｄａＧＶＫ研究了从拜耳工艺浓缩液中溶剂萃取镓。溶液中,ρ(Ｎａ2Ｏ)≈450ｇ/Ｌ,ρ(Ａｌ2Ｏ3)≈80ｇ/Ｌ,ρ(Ｇａ)≈019ｇ/Ｌ。使用的萃取剂为12%的Ｋｅｌｅｘ100,一种7取代烷基8羟基喹啉;改性剂为12%的异癸醇;稀释剂为煤油。在相比为1、室温条件下,3ｈ内,镓的萃取率为80%。为了改善萃取动力学,研究了在有机相中添加表面活性剂的情况。发现,在有机相中加入阳离子表面活性剂,如辛胺,由于镓与胺离子之间的排斥力,降低了镓的萃取速率和萃取率;在有机相中,若加入阴离子表面活性剂,如石油磺酸盐,则萃取速率及萃取率均明显改变。当加入…     

从提钒废渣中回收金属镓的试验

这个试验是采用从人造工艺矿石-提钒弃渣中回收金属镓的工艺流程,完全不同于传统的工艺方法,其原则流程为提钒弃渣→还原焙烧→两步循环酸浸→TBP 萃镓→中和沉淀→碱溶电解。全流程镓的回收率64.4%。本工艺在酸浸工序有其独自特点:TBP 在盐酸体系中对镓具有良好萃取性能;能较好地回收提钒弃渣中的镓、铁、钛等元素;全流程闭路循环,基本无“三废”。     

HDEHP萃取Ga(Ⅲ)机理的研究

ＨＤＥＨＰ萃取Ｇａ（Ⅲ）机理的研究刘桂华李小斌孙思修（中南工业大学冶金系，长沙４１００８３）（山东大学化学院）关键词：Ｇａ（Ⅲ）萃取机理ＨＤＥＨＰ镓是重要的稀有金属，在自然界中，镓伴生于其他矿物中，通过溶剂萃取来分离、富集镓的化合物是镓冶炼中一种重要...     

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.