锌电积用阳极的研究与发展

锌电积中常用的阳极为铅银合金阳极,该阳极虽能基本满足生产需求,但存在阴极产品被铅污染,析氧超电位高的问题,为此,人们研究了铅基多元合金阳极和钛基DSA阳极。本文综述了锌电积用阳极的发展状况,重点阐述了铅基阳极,钛基DSA阳极的组成和性质,介绍了阳极表面预处理方法,并为二氧化铅膜的形成过程进行了探讨。     

钛基DSA阳极在锌电积上的应用研讨

介绍了钛基DSA阳极电积锌的试验情况。锌电积改用钛基DSA阳极,比使用铅银阳极每吨析出锌直流电耗平均降低约98 27kW·h,电积过程无需添加SrCO3,析出锌含铅低于0 0014%且极易达到Zn99 995的标准要求。并对其应用状况和前景进行了研讨。     

锌电积用惰性阳极材料的研究现状

文章系统地综述了锌电积用惰性阳极材料的研究现状。根据电极的基体材料不同，重点阐述了铅基合金电极，钛基DSA阳极，铁基涂层电极等的组成，制备及性质。     

锌电积用惰性阳极材料的研究现状

锌电积长期采用Ph—Ag合金为阳极。该阳极存在析氧过电位高、易腐蚀且污染阴极锌等问题,因此人们研究了各类新型阳极。阐述了国内外铅及铅合金阳极、复合电催化铅基阳极、钛基DSA阳极及其他基体阳极材料的研究现状,着重指出了铝基阳极材料具有较好的发展前景,并对未来锌电积用惰性阳极材料的发展趋势进行了展望。     

氧化钛阳极及其在银电解中的应用

<正> 1956年Beer发现钛材在电解槽中具有对溶液不导电而对金属固体导电的性质,从而发明了被誉为本世纪电化学领域中重大发明之一的尺寸稳定性阳极(DSA),简称钛阳极。钛阳极从氯碱工业推广至Co、Ni等电解冶金领域。由于应用最广的钌-钛     

电解二氧化锰用钛基钛锰合金全浸没板状阳极的研制

电解二氧化锰生产中采用铸铝横担钛基钛锰合金全浸没板状阳极代替传统阳极或条状钛基钛锰合金阳极，能显著地提高电解二氧化锰（ＥＭＤ）质量，有明显的节能效果。其设计合理，整体强度高，几何形状稳定，电解电流分配均匀，便于装卸和剥离产品，大大减轻了工人劳动强度，提高了设备利用率，有显著的经济效益和社会效益。     

萃取－旋流电积工艺从镓锗浸出液中生产阴极铜

介绍了某冶炼厂采用萃取－旋流电积工艺从镓锗浸出液中生产阴极铜的工业化应用情况。在铜的萃取生产过程中,通过优化反萃液酸度、萃取温度,同时监控浸出液中有害杂质含量和增设活性白土有机相净化装置,有效解决了铜萃取率低、分相慢和萃取有机相降解等技术问题;在铜的旋流电积生产中,采用钛基二氧化铅阳极替代钛基贵金属阳极、溶气泵加气浮澄清除油装置替换二级纤维改性材料除油装置,通过铜离子浓度电积终点准确控制、古尔胶助剂添加量、铜电积循环液温度优化,解决了阴极铜析出质量差、钛基贵金属阳极损耗大等生产难题,阴极铜的质量和阳极寿命均得到明显改善。     

钛基二氧化铅阳极板在电解液净化的应用

钛基二氧化铅阳极板作为一种新开发出来的不溶阳极在铜电解液净化工序逐步得到应用,早些时候因为材料和工艺的限制 PbO2 涂层容易发生脱落,影响该类阳极板的使用周期。近年来制造工艺技术得到较大进步,问题得到解决,甚至某些新建铜电解车间直接进行了大规模应用。本文将传统铅合金阳极板和钛基二氧化铅阳极板在相同的工况下,从电流效率、电耗、产品质量、使用周期、生产操作等几个层面进行了对比分析,与传统铅合金阳极板相比,钛基二氧化铅阳极板电流效率提高了 7.85%,产品质量更佳,使用周期延长到两倍以上,且板面平整度较稳定,生产操作效率高,但脱铜电耗提高 10%,脱铜生产中短路会熔穿板面。以上从经济性角度为铜电解液净化工序选择不溶阳极提供了参考。     

牺牲阳极材料及其在金属防腐工程中的应用

牺牲阳极材料是一类特殊的电化学功能材料，在金属防腐工程中应用广泛，文章综述了牺牲阳极材料的研究现状，介绍了目前常用的锌基，镁基和铝基等三种牺牲阳极材料的基本化学成分和性能特点，讨论了合金元素的作用，并对牺牲阳极的一些新发展和应用情况作了说明。     

Pt-Ir涂层阳极的制备及在电解水中的应用

以Ru-Ir为主要成分的阳极材料具有广泛的应用领域,但在电解水这一领域的应用一直颇受争议,因为Ru8+有剧毒,而以Pt-Ir为主要成分的新型阳极材料则很好地解决了这一问题.钛是一种生物材料,对人体没有任何排斥反应,Ir则具有很好的析氧活性和较低的成本.研究结果表明,在酸性环境下,原生态氢原子具有极强的还原性能,可使阳极中的活性物质还原,从而失去活性;而IrO2的结构更加紧密,微裂纹更加细小,具有很强的抗还原能力,更加适合酸性电解环境.从微观结构看,钛基阳极的Pt-Ir涂层结晶颗粒均匀、细小,涂层表面形貌为龟裂纹状,涂层的裂纹表面可以大大增加涂层的真实表面积,可以提高阳极寿命;从具有Pt-Ir涂层的钛基阳极的制水效果和强化寿命来看,均已达到了镀铂阳极和Ru-Ir阳极的标准,达到了工业化应用的程度.     

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.