铜电解液的净化

广州珠江铜厂有限公司采用中和法中和废电解液,阶梯脱铜槽脱铜除砷锑,真空蒸发浓缩除镍的工艺净化铜电解液,投产后,基本能满足电解液净化的要求,对稳定电解液的化学成分起到很大的作用。     

用磷酸三丁酯从铜电解液中萃取砷

<正> 砷是铜电解液净化的主要杂质之一。目前工业上采用不溶阳极电积脱砷,脱砷效率在30％以下,且有部分砷呈酸雾直接排入大气,污染环境。 根据我矿铜电解厂设计要求,并考虑到我矿所产阳极铜含As高达0.4～0.8％,为了解决电解液净化除砷问题,进行了用磷酸三丁酯从铜电解液中萃取砷的试验研究。     

净化铜电解液中杂质的方法

综合了当前各种净化铜电解液中杂质的方法，其中包括脱铜脱砷法、吸附法、用各种沉淀剂沉淀的沉淀法，萃取法和离子交换法。为净化铜电解液中杂质提供了极为宝贵的资料，具有一定的参考性和实用性。     

高杂铜电解液净化生产实践

介绍了某公司高杂电解液铜电解生产过程中,铜平衡控制、杂质元素脱除等方法。通过生产实践,通过电解液净化流程优化,阳极泥处理后返液净化,电解液含砷浓度控制等方法,有效提高了电解液系统净化脱杂能力,解决电解液铜贫化问题,稳定了电解液中铜离子及杂质元素的平衡,电解液净化调整后,铜的脱除率降低了31.6%,镍的脱除率提加了23%,电解液铋含量达到了0.3 g/L以下。     

大冶有色铜电解液净化工艺选择及成本分析

铜电解液净化工序中脱铜通常采用电积脱铜和生产硫酸铜两种工艺,两种工艺可以单独和组合生产。本文对三种生产工艺的成本进行对比分析,得出一个经验公式,对铜电解生产中选择电解液净化脱铜的方式具有一定的指导意义。     

铜电解液净化萃取脱砷

本文针对株冶铜电解液含砷高的特点,分析了砷在电解液中存在的形态及国内外进行净化的现状,提出了用溶剂萃取法脱砷的途径,并通过实验室的研究,阐述了温度、酸度、相比分别对萃取率的影响,从而达到砷有34以上开路的目的。     

铜电解液净化萃取脱砷

本文针对株冶铜电解液含砷高的特点,分析了砷在电解液中存在的形态及国内外进行净化的现状,提出了用溶剂萃取法脱砷的途经,并通过实验室的研究阐述了温度、酸度、相比分别对萃取率的影响,从而达到砷有3/4以上开路的目的。     

铟电解液净化方法研究

铟电解液的纯度是铟电解提纯效果的主要影响因素之一。为了有效提高铟电解精炼的纯度,对铟电解液的净化方法进行研究,提出静态净化与动态净化的概念,并将静态净化和动态净化相联合对铟电解液进行净化处理。静态净化采用硫酸钡共沉淀方法,动态净化采用海绵铟柱置换方法。研究表明:静态净化的条件为:在搅拌状态下,以BaCl2为沉淀剂,逐滴滴入经硫酸酸化过的铟电解液中。BaCl2用量控制在每升硫酸铟溶液中加入15～30 g氯化钡,反应温度控制在30～50℃之间。动态净化中所用的海绵铟纯度需高于配制电解液所用铟的纯度1～2个数量级,每升电解液需用20～200 g海绵铟。该方法突破单纯静态净化的思路,将电解液的净化过程由电解前延伸至电解过程中,不仅保证了最初配制电解液的纯度,也可以使铟电解液在电解过程中随时得到净化。静态与动态联合的净化方法,同时保证了电解前及电解过程中的电解液纯度,一次电解完毕后可直接重复利用该电解液,不用再进行其他净化,可以大大减少铟电解工艺的工作量。     

铜电解液的净化

广州珠江铜厂有限公司采用中和法中和废电解液，阶梯脱铜槽脱铜除砷锑、真空蒸发浓缩除镍的工艺净化铜电解液，整个流程简单、实用、占地面积少、投资少、操作方便。     

新一代铜电解液绿色净化新技术

新一代铜电解液绿色净化新技术实现了净化电解液中铜与杂质砷、锑、铋的定向分离,解决了脱杂过程产生砷化氢和酸雾有毒有害气及物料重复冶炼等问题,砷有效开路,无有害气体产生,实现了清洁绿色生产。替代了原工业生产阴极铜电解液电脱铜诱导净化除杂工艺,所需脱除的铜全部富集并直接生产A级阴极铜产品,电耗降低55%,实现传统冶炼向绿色清洁冶炼转型。     

Dissolution kinetics of copper sulphide anodes

Constant current and voltammetric experiments were carried out with synthetic and natural chalcocite and synthetic digenite anodes in a variety of electrolytes. Rapid dissolution of copper occurred at low potentials until limited by the rate at which copper could be transported from the reaction zone by diffusion through electrolyte held within the porous product layer. At this point, the potential rose sharply (galvanostatic) or the current began to fall (voltammetric) corresponding to the formation of elemental sulphur. Quantitative support for this mechanism was obtained using a simplified model of the pore diffusion process. The complexity of the solid-state reactions occurring in the anode product was revealed by a novel technique which enabled direct observation of the product profile during electrolysis.     

几种螯合树脂在模拟的钴电解液中吸附铜的性能研究

对比研究了三种亚胺二乙酸螯合树脂D850、D463、D751、一种氨膦酸基螯合树脂D860及一种氨甲基吡啶树脂CuWRAM在模拟的钴电解液的硫酸盐体系、氯盐体系及硫酸盐-氯盐混合体系中吸附铜的性能.结果表明:五种树脂均在料液pH较高的条件下对铜的吸附容量最大,其中以D860的对铜的交换容量最大,以CuWRAM对铜的交换...     

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.     

As,Sb, and Fe removal from industrial copper electrolyte by solvent displacement crystallisation technique

The presence of impurities in the copper electrolyte increases the energy consumption of an electrorefining process and contaminates the deposited copper on cathode. The concentration of impurities increases over time making it necessary to remove them from the solution. This research introduces a fast, effective, and simple method to refine the industrial electrolyte from arsenic, iron and antimony by solvent displacement crystallisation technique. In this method, when alcohol is added to the electrolyte, the impurities precipitate from the solution as amorphous arsenato antimonite phase. Results show that Fe, Sb, and As are removed from the copper electrolyte by 75.2, 96.9 and 99.8%, respectively. Electro winning experiments show that the electric energy consumption for electrodeposition of copper is 15.5% lower when the electrolyte is free of impurities.     

树脂除杂技术在铜电解工业化应用研究

采用树脂对铜电解液中杂质锑和铋进行深度净化除杂的工业化应用试验,结果表明,该技术对铜电解液中杂质锑和铋的去除率均大于95%,吸附树脂锑和铋的解析率均大于95%,除杂过程中电解液中铜、镍离子含量基本不变,经过净化后的铜电解液持续返回铜电解生产系统,生产运行良好,阴极铜产品质量符合GB/T 467-2010标准中规定的Cu-CATH-1要求。     

Production of copper nanoparticles by electrochemical process

There are numerous methods for preparing copper nanoparticles of which electrodeposition is one of the most suitable and simplest. The electrolyte used in the present investigation is an acidified aqueous solution of copper sulphate with suitable additives. By varying the input dc voltage with a constant current, a spongy layer of copper particles is deposited on the cathode surface. Particles are collected and characterized by XRD and UV-Vis, the surface morphological characterization is done by SEM and TEM.     

铜电解废液资源化处理工艺

针对铜冶炼厂的铜电解废液, 确定了隔膜电解时在阴极上得到了质量优良的铜片、海绵铜和黑铜,阳极室内得到浓度为23g/L~37g/L的硫酸溶液,扩散渗析法处理脱铜后液时得到较纯净的稀硫酸和硫酸镍的工艺路线,探讨了最佳隔膜电解工艺参数和酸盐分离系数。     

含硫有机添加剂对电解铜箔组织性能的影响

采用自制镀液循环电解铜箔实验装置研究了在含胶原蛋白的电解液中加入0～6 mg/L聚二硫二丙烷磺酸钠(SPS)对电解铜箔组织性能的影响.随着SPS质量浓度增加,铜箔光泽增加,粗糙度和抗拉强度降低.利用扫描电镜(SEM)、X射线衍射仪(XRD)、电子背散射衍射(EBSD)分别对电解铜箔微观形貌和组织结构进行分析,发现SPS使铜箔表面由粗糙变得平整,铜箔的晶面择优取向由(220)变为(200).     

Electrochemical deoxidation of induction-stirred copper melts

Induction-stirred melts of copper contained in zirconia-base electrolyte crucibles were deoxidized by electrochemical pumping of oxygen. The rate-controlling step for the deoxidation reaction was found to be transport of oxygen in the electrolyte in the higher oxygen concentration ranges, and transport across a boundary layer in the melt at the melt/electrolyte interface for the lower concentration ranges. The mass transfer coefficient for transport of oxygen across the boundary layer at the melt/crucible interface was determined to be αco^u = 1.7 . exp (-12,900/äT) cm/s The optimization of the experimental parameters for this new deoxidation method are discussed.