电化学溶解镍基高温合金废料的研究

采用电化学溶解法对含Co、Cr、Al、W、Mo、Hf等金属的镍基高温合金废料在硫酸中的溶解过程进行研究。考察了电流密度、电解液酸度、温度、电解液Ni 2+浓度对电解过程的影响。结果表明,在阳极电流密度300A/m2、硫酸浓度1mol/L、电解液温度40℃的条件下平均槽电压为2.4V,电解1t合金的能耗为2 083kWh,电流效率98.46%。与硫酸体系相比,盐酸体系下稀散金属能在阳极泥中得到更好的富集。     

含钌含铼阳极泥处理工艺研究

针对某含钌含铼电解阳极泥,采用"酸性氧化浸出—碱焙烧—水浸"法处理。考察了氧化浸出酸度、温度、液固比、氧化剂用量、搅拌速率、浸出时间对铼浸出率的影响。结果表明,在盐酸浓度2mol/L、85℃、液固比L/S=4、氧化剂用量为理论量的1.4倍、搅拌速率200r/min、浸出时间2.5h的条件下,铼的浸出率可达99%以上,而钨、钽、钌接近100%留于浸出渣中,实现铼与钨、钽、钌的分离。氧化浸出渣采用传统"碱氧化焙烧—水浸—蒸馏"法处理,实现钌与钨、钽的分离,蒸馏后液及水浸渣可分别回收钨、钽。     

小阴极电化学溶解镍制备硫酸镍的研究

以高纯度金属镍为原料,在硫酸体系中提出了小阴极电化学溶解工艺制备硫酸镍的新工艺。考察了电流密度、阴极面积、电解温度和双氧水的用量对镍板电化学溶解过程的影响,结果表明,在阳极电流密度250A/m2、电解液初始硫酸浓度1.8mol/L、电解液温度40℃,阴极有效面积为阳极面积的10%、双氧水的用量为0.3m3/t的条件下,电解1t金属镍的能耗为1368kWh电流效率99.01%。     

钨铼合金废料电化学溶解研究

为实现钨铼合金废料的快速、高效溶解,采用NaOH碱性体系下电化学溶解W-2 5 Re合金边角料。结果表明:当槽电压2.5 V、NaOH浓度100 g/L、电解温度30～40℃、电溶10 h时,电解溶液含W和Re浓度分别达到46.4和15.4 g/L,此时W和Re的溶出率分别为99.78%和99.35%,阳极电流效率达到98.80%,电溶能耗为2.29 kWh/kg。电溶后阳极经SEM表征,其表面呈现丘陵形貌,EDS分析表明,电溶前后阳极的W/Re质量百分比基本不变,W溶出速率约为Re的3倍。     

含铪废合金处理工艺研究

采用"电溶—磷酸沉淀"工艺处理某含铪废合金,在电流密度200~300A/m2,电解液酸度1mol/L H2SO4,终点镍离子浓度80g/L的条件下,电溶过程电流效率可达90%以上,电溶效果良好;电溶液在80℃加入1g/L磷酸,铪的回收率可达90%以上;铪的综合回收率达95%以上。     

从氯盐水溶液中隔膜电解提取Ni-Fe合金

研究了从氯盐体系中隔膜电解提取Ni-Fe合金的工艺。实验主要考察了Ni2+浓度、电解液pH值、H3BO3浓度、阴极电流密度、电解液温度对电流效率、槽压和产品质量的影响。结果表明,当电解液中[Fe2+]=80 g/L,[Ni2+]=40~50 g/L,[H3BO3]=15 g/L,pH=1.5~2.0时,在电流密度为300~350 A/cm2,温度为50~55℃的条件下,采用阴离子膜电解,电流效率可达98%,产品中镍含量在20%以上,可满足工业生产需要。     

高温合金中铼金属回收制备高纯铼酸铵研究

以废旧镍基高温合金作为原料合成制备高纯铼酸铵,考察废旧高温合金的最优电解条件、稀散金属铼在电解过程中的分布情况和存在形态以及高纯铼酸铵制备工艺.通过电化学溶解的方法,将镍基高温合金的活泼金属转至溶液内、较惰性的金属以固态阳极泥形式与活泼金属元素分离,阳极泥中的铼通过高温氧化、高纯氨水吸收、结晶直接制备高纯铼酸铵.研究结...     

难溶高熔点金属合金回收工艺研究进展

综述了含铼高温合金、稀贵金属合金、硬质合金和铜钴白合金回收工艺研究进展,结合电化学溶解研究结果,对难溶高熔点金属合金的回收提出了一些建议。     

镍基含铼废合金控制电位选择性溶解工艺研究

镍基合金中含有铼钨钼钽等多种稀有战略金属,具有极高的综合回收利用价值。首先,本文从热力学角度分析了电化学溶解的可行性,讨论了金属元素在电溶液和阳极泥中的分配情况:负电位的金属以简单阳离子形式进入溶液;铼钼部分以含氧离子形式进入溶液,大部分以金属氧化物的形式进入阳极泥中;钨钽锆等惰性金属完全以氧化物形式进入阳极泥中。其次,重点研究了槽电压、酸度、离子浓度和温度对电流密度及电流效率和能耗的影响。结果表明,最佳电溶工艺条件:槽电压1.8 V,盐酸浓度2.0 mol·L~(-1),温度40℃,离子总浓度为30~40 g·L~(-1)。在此工艺条件下,电流密度为303.2 A·m~(-2),能耗为1688~1876 k W·h·t~(-1)。实验中各金属在溶液和阳极泥中的分配情况,与热力学分析结果相符。铼的富集比超过3.0,实现了对铼等稀散金属的富集。此外,阳极泥呈黑色细粉末状,可以直接用于后续浸出实验研究。     

从含铟铅合金中回收铟

采用电溶-萃取工艺从铅铟合金中回收铟。结果表明,在电流密度155 A/m2、电解周期24 h、电解前液含In 1.8g/L、室温、极距为4 cm的最优条件下,金属铟的溶出率达到94.28%;采用P204从氟硅酸电解液中非平衡萃取提取铟,在有机相组成为30%P204+70%磺化煤油、萃取级数为3级、相比VO∶VA=1∶3的条件下,金属铟的萃取率达到98.69%。负载有机相采用6 mol/L的盐酸反萃,在VO∶VA=6∶1、级数为6级的条件下,反萃率接近100%,同时实现了与杂质元素Zn、Fe、Sn的分离。     

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.