铜电解液净化中的节能和经济效益

对采用间断电积法、连续电积法、控制阴极电势电积法净化铜电解液的电耗和经济效益作了论述。控制阴极电势电积法较传统电积法节电６０％左右,年产１万ｔ电解铜的车间,其净液工序可增加经济效益４０万元以上     

提升电积铜质量的生产实践

在铜电解精炼生产过程中，净液工序平衡电解液中铜离子浓度的主要方式有生产硫酸铜和电积脱铜两种方式。在满足生产工艺的前提下，铜电解液的净化过程还应综合考虑上述两种方式的经济性，实现效益最大化。贵溪冶炼厂电解车间根据电解液杂质情况，在净液工序合理停开一次电积脱铜生产电积铜。前期电积铜质量不稳定，但通过加强装槽质量和槽面管理，合理给液流量，改进供液方式，调整添加剂等措施，电积铜化学成分与物理外观均达到1#铜标准，部分达到A级铜标准。     

铜电解液净化中的节能和经济效益

对采用间断电积法,连续电积法,控制阴极电势电积法净化铜电解液的电耗和经济效益作了论述,控制阴极电势电积法较传统电积法节电６０％左右,年产１万ｔ电解铜的车间,其净工序要增加经济效益４０万元以上。     

铜电解液的净液方法

本发明是关于铜电解精炼工序中的电解液的净液方法,特别是详述了关于除去电解液中的Sb、Bi、As等杂质的方法。铜电解精炼工序的电解液中的杂质Sb、Bi、As等是从阳极溶出在该电解液中的,或作为阳极泥悬浮于该电解液中。当悬浮的阳极泥附着在阴极表面时,就会从其附着点形成突起状的电积,成为电极间产生短路的原因,或将阳极泥及电解液带入电积铜中,成为导致阴极质量降低的原因。另一方面,当溶出在电解液中的Sb、     

分段循环式电积脱铜除杂工艺的应用

在现有连续电积除杂法的基础上,通过改变电积除杂的给液方式,以分段脱铜、除杂的方法,解决电解净液系统存在的问题,充分发挥设备潜能,提高除杂效率,优化作业环境,降低劳动强度,节约生产成本。     

电解净液工艺处理铜阳极泥浸出液的生产实践及优化

金隆铜业有限公司技改前采用旋流电积系统处理铜阳极泥浸出液,因旋流电积系统设计能力受限,仅能处理少量杂质含量低的二段浸出液,大部分浸出液外售处理,每年损失1086万元。公司决定进行改造,有两种处理方案:一是继续现有旋流电积工艺并扩大产能;二是通过电解净液工艺处理。经过效益对比,发现采用电解净液工艺处理更为经济。公司确定电解净液工艺处理的方案后,又对独立系统处理浸出液和浸出液与废电解液混合后处理两种方式进行了比较,发现浸出液与废电解液混合处理方法较优,该方法处理后的产品成分较为稳定,能够满足标准铜的生产。生产实践表明,此方案的应用减少了成本和场地等投入,并且处理能力得到了提升,还提高了金属回收率,减少了环保隐患,为铜冶炼行业处理同类浸出液提供了参考方案。     

鼓风电解

<正> 我厂用铜精矿经沸腾焙烧—浸出—电积生产电铜,废电解液用电积法脱铜。几年来产出的海绵铜越积越多,影响资金周转。决定改用鼓风电积代替脱铜电积直接产出电铜。其技术条件如下:     

从铜废电解液中高效提升铜直收率的工艺实践

在铜精炼电解工艺中,部分废电解液需要进行脱铜、脱杂处理。为了提高祥光铜业电解净液工序中高纯铜产品的直收率,提升经济效益,故对初期硫酸铜生产工序、电积铜及脱杂工序和硫酸镍生产工序进行改造,最终将原生产的硫酸铜和部分高杂的电积铜及高杂含铜物料优化成高纯 A 级铜和高纯铜粉。     

铜电解液净化脱砷新工艺

总结了萃取法和连续电积法两种铜电解液净化脱砷新工艺的特点，并进行了分析比较。     

并联循环连续电积脱砷法在云铜的应用

介绍了云铜对铜电解液脱砷过程的研究、试验和实践,分析了并联循环连续电积脱砷法的特点及其应用情况。     

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.     

铜电积技术的发展现状及应用前景

介绍了现有商业铜电解技术最新进展及发展方向.过去的40年间,湿法炼铜工业经历了重大变革.目前,随着科技进步,高质量铅合金阳极、改良的不锈钢基板、先进的电解质控制和电解车间自动化技术的出现,电积铜技术越来越成熟.不久的将来,电积铜技术(包括尺寸稳定的阳极,替代的阳极反应,新颖的电解槽设计和创新的电解循环系统)将会有更低的生产成本,更高质量的产品,这将使电积铜产业有更大的发展.     

DBSA集成铜电解工艺成套技术和装备开发及应用

DBSA集成电解工艺成套技术和装备由"双向平行流铜电解及电积工艺技术"、"多回路平衡导电技术"、阳极泥实时收集技术"、"高效电积及酸雾抑制技术"等技术和装备组成。双向平行流铜电解技术改变了传统的循环方式,加上多回路平衡导电系统的作用,可实现高电流密度电解;阳极泥实时收集技术缩短了阳极泥回收周期;"高效电积及酸雾抑制技术"可在很低的铜离子浓度下电积产出高品质阴极铜,且改善了电积车间的环境。     

砷化氢的毒性及在铜净液中的防治

介绍了砷化氢的毒性及危害性。传统的铜电解后液净化方法电积时不可避免地析出砷化氢，严重污染环境。控制阴极电势电积法彻底解决了砷化氢的析出问题，做到了环境治理与经济效益的统一，值得推广应用。     

The fluidized bed electrowinning of silver

Fluidized bed electrowinning appears to be an alternative to the Zadra cell usually employed to deposit silver electrolytically from cyanide solutions. By using a bench scale cell it was found that when using either pure silver or silver coated copper particles such electrowinning could be carried out without operating problems and with reasonable current efficiency and cell voltage. Various anodes, for use in the cell, were examined and three found to be satisfactory. By electrolyte analysis and by EDAX analysis of the silver deposit, the silver was shown to be free of impurities down to the detection level of the analyses.     

金隆铜电解精炼生产实践

介绍金隆铜业有限公司近几年铜电解精炼的生产状况,分析高杂质电解条件下阴极铜出现质量波动的原因和采取的解决措施、电积脱杂方面的改造和效果、萃取法脱除锑铋在电解液净化方面的应用、降低阴极铜含银的措施方法等。     

Physico-chemical properties of copper electrorefining and electrowinning electrolytes

Densities, viscosities, electrical conductivities and specific heats of solutions containing copper, nickel, arsenic, iron and sulphuric acid in the concentration ranges of copper electrorefining and electrowinning electrolytes have been measured. Equations are presented for calculating these properties as a function of electrolyte composition and temperature. DEREK C. PRICE, formerly Research Associate, Department of Mining and Metallurgical Engineering, McGill University, Montreal, Canada     

Material balance as the basis for process control in electrowinning and electrorefining

Electrowinning and electrorefining, like chemical processes generally, are amenable to comprehensive material balance analysis for purposes of process control. However, current efficiency in electrowinning is insufficient to provide the requisite agreement between current and electrolyte flows on the one hand and observed concentration changes on the other. The many factors contributing to volume change and metal loss is electrowinning determine a “volume efficiency”, as previously defined, which can differ significantly from 100%. Use of volume efficiency in conjuction with current efficiency is illustrated by experimental data for the case of nickel electrowinning employing a porous separator. In electrorefining, anode current efficiency is a major factor in the material balance. The chemical compositions of anodes and cathodes and their respective current efficiencies contribute the source terms for soluble impurity buildup in the electrolyte. An analysis is developed which takes into account the principal mechanisms of extraneous weight loss of anodes, including dissolution of oxide inclusions, disintegration and chemical corrosion. The considerations involved are illustrated for nickel impurity in copper anodes.