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。     

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。     

锌电积阳极板材的研究发展现状

详细介绍了国内外锌电积阳极板材的研究现状,以及几种普遍用作锌电积阳极板的材料,如铅及铅合金阳极、四元合金、不同方法制备的钛基涂层阳极等,同时比较了各自的优缺点,最后对电极领域的发展作出展望.     

铅基合金阳极在有色金属湿法冶炼中的研究与发展

介绍了当前有色金属湿法冶炼中铅基合金阳极的研究进展,主要概括了锌电积中各种铅基合金阳极的研究成果及这些阳极的优点和缺陷,并提出了铅基阳极表面改性后的优点。     

锌电积用铅基阳极的研究现状及发展

从合金配伍和制造方法上阐述了锌电积用铅基合金阳极材料的研究现状,通过比较对未来锌电积用惰性阳极材料的发展趋势进行了展望,并提出降低阳极生产制造成本,关键在于降低阳极含银量,在于开发多元合金压延阳极板。     

锌电积电流效率影响因素的研究进展

本文介绍了锌电积过程中电流效率的影响因素,列举了其对锌电积影响的研究进展。认为锌电积过程中杂质离子的影响机理及净化方法有待进一步研究。同时,有必要研制出新型阳极材料,进而达到取代有色金属电积过程中目前沿用的铅基合金阳极,使电积锌生产实现低能高产最大化。     

湿法炼锌电积用阳极新技术工业对比实验

通过将铅包铝冶金结合及铅包铝芯压合两种新技术、新工艺制作的锌电积阳极与传统阳极开展工业对比试验,探索和验证新型阳极材料的优点和不足。     

有色冶金动态

采用镀钛阳极电积有色金属可节能20% 面对有色金属能源单价上涨,进行了采用镀钛阳极代替铅阳极或石墨阳极回收铜、锌、镍、钴的试验性生产,发现可以节能20%。由于钛层阳极结构合理,表面积大,活性高及形状稳定,使阳极槽电压显著减少。钛阳极还有     

苏州枫港钛业——湿法冶金设备专业供应商

<正>苏州市枫港钛材设备制造有限公司地处苏州高新技术产业开发区,是一家致力于生产和研发稀有金属化工设备和不溶性阳极材料的高新技术企业,公司的主要产品有稀有金属(钛、钽、铌)化工设备和不溶性阳极材料,公司联合国内的科研机构和单位,成功开发出了一系列电沉积金属用不溶性阳极,主要的产品有电积铜、电积镍、电积锌、电积钻等不溶性     

锌电积节能措施的研究现状

传统的湿法炼锌过程中,存在着电积能耗大的问题．文章系统综合了当前锌电积的节电措施,并对新型惰性阳极材料及锌电积新工艺的研究现状进行了详细阐述．     

锌电积节能措施的研究现状

传统的湿法炼锌过程中，存在着电积能耗大的问题。本文系统综合了当前锌电积的节电措施，并对新型情性阳极材料及锌电积新工艺的研究现状进行了详细阐述。     

Developments in anodes for pure copper electrowinning from solvent extraction produced electrolytes

The adoption of solvent extraction (SX) techniques in copper recovery flowsheets has resulted in the production of electrolytes from which extremely pure copper may be obtained directly by electrowinning. The necessity to use high acid content strip solutions however may result in attack of conventional lead anodes and therefore in cathode contamination by anode material. Extensive studies have been carried out to determine methods of preventing lead anode dissolution and various alternative lead and non-lead anode materials which are capable of operating under tankhouse conditions have been examined. Non-lead anode materials, which it has been suggested may replace conventional anodes, are described and the effect on capital and operating cost of installing and using higher cost non-lead anodes is examined in comparison with lower cost lead anode alternatives.     

Manganese metallurgy review. Part III: Manganese control in zinc and copper electrolytes

Manganese is often associated with zinc and copper minerals, and can build up in the processing circuits. Part III of the review outlines the current practice and new developments to get a better understanding of manganese behaviour and control in electrowinning of zinc and copper, and identifies suitable methods and processes to control manganese.In zinc electrowinning, the presence of small amounts of manganese (1–5 g/L) can minimise the corrosion rate of the anodes and reduce the contamination of the cathodic zinc with lead, but excess manganese results in significant decreases in the current efficiency. The neutralized zinc feed solution that contains little acid is considered to be the best place to implement manganese control. Various methods and processes for manganese control in zinc electrowinning have been developed. Oxidative precipitation and solvent extraction are the most important methods. For the neutralized zinc solution at pH 5, oxidative precipitation using a strong oxidant such as Caro's acid and SO₂/O₂ can selectively precipitate manganese as insoluble MnO₂ or Mn(OOH), leaving other impurities, e.g., Mg, Cl⁻, F⁻, etc. in the circuit. Solvent extraction of zinc using D2EHPA (di-2-ethylhexyl phosphoric acid) can selectively recover zinc from the solution and leave other impurities including manganese in the raffinate.In copper solvent and electrowinning circuits, the problem of manganese is mainly associated with the decrease in the current efficiency and degradation of the solvent caused by the higher valent manganese species generated on the anode. The prevention or minimisation of Mn(II) oxidation during the electrowinning is critical. This can be achieved by adding ferrous ions or sulfur dioxide to control the cell potential.     

Addition of Cobalt to Lead Anodes Used for Oxygen Evolution—A Literature Review

A review of the literature dealing with the effect of cobalt on lead-based anodes for oxygen evolution during electrolysis of sulfuric acid solutions verifies that the presence of cobalt at the anode–electrolyte interface, either as constituent of the anode material or as ions in the electrolyte, catalyzes the evolution of oxygen and reduces the corrosion of the anodes and the contamination by lead of metal cathodes produced during electrowinning. However, due to harmful effects of cobalt ions on the cathodic reaction in some processes, these benefits are limited to the electrowinning of copper. Efforts to develop a way of introducing cobalt at the anode–electrolyte interface without interfering with the cathodic reactions are reviewed in this paper. The use of lead–cobalt alloy anodes has had limited success due to issues arising from the low solubility of cobalt in lead, segregation during casting of the alloys, and nonuniform distribution of cobalt which affects the integrity of the anodes. This has been overcome in part lately by inclusion of cobalt into only the surface layer of a lead or lead alloy substrate, by thermal treatment of a cobalt salt to form a catalytic cobalt oxide surface species, or by electrodeposition of composite lead–cobalt oxide anodes. The last approach in particular has been actively investigated by several groups, but to our knowledge it is yet to find application in the industry. The review also critically examines the likely reaction mechanisms involved.     

Electrowinning copper from solvent extraction acid strip solution using Pb-Sb anodes

Copper electrowinning from solvent extraction acid strip solutions was studied as a part of a more comprehensive laboratory investigation on development of a process for treating native copper ores by ammoniacal leaching-solvent extraction-electrowinning methods. Because initial electrowinning tests resulted in poor quality copper cathodes, a study was undertaken to determine the conditions necessary for producing high-quality electrowon copper before proceeding with other phases of the process development. The electrowinning tests showed that removing entrained organic from the electrolyte, maintaining a protective voltage on the anodes when electrowinning was not in progress, and adding a small amount of cobalt to the electrolyte resulted in production of copper cathodes with a low lead content when using antimonial lead anodes. After satisfying these conditions, large variations in other operating conditions were possible without materially affecting the lead content of the electrowon copper. Copper cathodes with lead contents of less than 2 ppm were consistently produced. These results were obtained with laboratory-scale equipment and quantitative extrapolation to industrial-scale operations may not be valid. However, the qualitative effects of the various processing conditions should be applicable to industrial electrowinning.