含钌含铼高温合金电化学溶解工艺研究

采用电化学溶解法对某含钌含铼高温合金废料在盐酸电解体系中的溶解过程进行研究。考察了电流密度、电解液酸度、电解液镍离子浓度、温度、搅拌速率对电解过程的影响。结果表明,在阳极电流密度400A/m~2、盐酸浓度2mol/L、镍离子浓度100g/L以下、电解温度40℃、搅拌速率200r/min的条件下,合金中镍、钴的电化学溶解率可达60%以上,钨、钽、铼、钌等稀贵金属溶解率小于0.8%,实现了合金中贱金属和稀贵金属的高效分离。     

汞膜电极的某些性质讨论及其阳极溶出伏安法在有色轻金属分析中的应用

阳极溶出伏安法以检测灵敏度高、准确度好、仪器设备简单、分析成本低的特点已获得广泛的应用,并发展成为一种重要的痕量分析方法。近年来,在我厂各种轻金属材料分析中汞膜电极阳极溶出伏安法的应用越来越多,有些方法已被制订为国家标准分析方法。一、汞膜电极阳极溶出伏安法阳极溶出伏安法通常包括电解富集和电溶出两个过程。电富集过程即在控制电     

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。     

生物质高压水热还原法分离回收高铁铝土矿中铁的机理研究

利用纤维素对高铁铝土矿进行溶出、还原,借助模型系统分析了不同温度下高铁铝土矿溶出、还原的动力学,并通过试验验证得出:最佳温度为280℃、NaOH浓度为180g/L,最佳铝溶出率、铁还原率分别为84%、81%。     

从蚀刻废液中隔膜电沉积金属Cu板新工艺研究

以铜始极片为阴极、石墨板为阳极,在有以阳离子交换膜为隔膜的电解槽中,从酸性CuCl2蚀刻废液电沉积金属铜板。研究了阴极液中起始Cu2+浓度、起始Cl-浓度、阴极电流密度、电解温度和极距等因素对电沉积的影响。最佳条件为:起始Cl-浓度5.5 mol/L,起始H+浓度3.0 mol/L,添加剂0.2g/L,阴极电流密度350 A/m2,电解温度36℃,极距5 cm,Cu2+浓度从40 g/L降低至20 g/L。在最佳工艺条件下,阴极电流效率达到92.77%,平均槽电压小于3 V;阴极上可以得到平整致密的金属铜板。阴极电解废液中的Cu2+浓度降低到20 g/L左右,可返回蚀刻过程配制蚀刻新液。     

无氰水溶性金溶液电化学合成条件研究

利用纯金板作阳极,不锈钢板作阴极,配位体Y为电解液,在阳离子膜电解槽中电解制备无氰水溶性金溶液,探索了该工艺各种参数和反应条件。研究结果表明,电化学合成该溶液的最佳条件为:阳极电解液Y浓度1~3mol/L,阴极电解液Y浓度0.1~1.0mol/L,槽电压15~20V,温度30℃~40℃,电解时间3h;实验所得的无氰水溶性金溶液质量浓度为1.26g/L,电流效率可达到5%。     

浅谈降低大极板铅电解液中铅离子浓度的方法

主要分析了大极板铅电解精炼过程中影响电解液Pb2+浓度的因素和对生产带来的危害。结合尺寸为4 500 mm×1 000 mm×1 620 mm的电解槽生产实例,提出了将电解液流量提高到45~50 L/min、H2Si F6浓度控制在80~100 g/L、电解液的温度控制在40~45℃以及提高电流密度和采用阳极二次电解、硫酸脱铅、更换部分电解液、不溶阳极脱铅来降低Pb2+浓度的方法,使Pb2+保持在100~120 g/L的正常水平。     

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。     

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%。     

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.