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Fundamental study for higher current density operation of copper electrorefining by controlling polarization with fluid flow of electrolyte

通过电解液流动控制极化实现铜电解精炼高电流密度操作的基础研究

基本信息

批准号：
23560894
负责人：
TAKASU Tomio
金额：
$ 3.33万
依托单位：
Kyushu Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2011
资助国家：
日本
起止时间：
2011 至 2013
项目状态：
已结题

项目摘要

A higher current density operation of copper electrorefining is desired to achieve the higher productivity. It is important to control the mass transfer on the electrodes and hence to acquire systematic data under the clear conditions of the mass transfer because many factors of electrolysis mutually affect each other. In this research, effects of fluid flow on the electrolysis were investigated by using RDE (rotating disk electrode) since the apparatus is small and the control is easy. Increasing the current density increased the polarization and the roughness of the deposit. Increasing the rotation speed decreased the polarization and made the surface flat. The additions of impurity elements changed the electrode potential in the high current density even with the rotation of the electrode. The addition of glue increased the polarization even with the fluid flow and achieved the flat surface.

为了获得更高的生产率，需要更高的电流密度操作。由于电解过程中许多因素相互影响，因此在明确的传质条件下控制电极上的传质，从而获得系统的数据是很重要的。由于RDE（旋转圆盘电极）装置体积小，易于控制，本研究主要研究了流体流动对电解过程的影响。随着电流密度的增大，镀层的极化程度和粗糙度均有所增加。增加转速可减小极化，使表面平坦。在高电流密度下，杂质元素的加入即使随着电极的旋转也会改变电极电位。胶水的加入使极化随流体的流动均匀增加，实现了表面的平整。