钴的冶炼基本采用湿法冶炼技术, 电沉积钴是湿法冶炼提取钴的重要部分. 研究了电沉积钴用不溶性阳极, 说明了阳极的制备方法, 测试并分析了阳极的强化寿命, 表面形貌及析氧析氯极化曲线, 同时対电极的失效机制进行了分析. 结果表明:添加含铱中间层既保证了钛阳极催化活性, 降低了能耗, 提高了电流效率, 又延长了钛阳极使用寿命. 槽压由以前的3.1 V降到2.5 V, 电流密度由250 A·m~(-2)提高到350 A·m~(-2), 在实际应用中钛阳极使用寿命达到两年.
Hydrometallurgical technology was widely used in cobalt refinement. Electrodeposition of cobalt was an important part of hydrometallurgical extraction of cobalt. Insoluble anode used in electrodeposition was studied. Anode preparation method was described. Accelerated life, SEM image and polarization curves for oxygen and chlorine evolution of titanium anode were tested and analyzed, and deactivation of electrode was also analyzed. The results showed that the middle layer containing iridium ensured the catalytic activity of titanium anodes, reduced power consumption, enhanced current efficiency, and extended the service life of titanium anodes. The cell voltage dropped from 3.1 V to 2.5 V. Current density load was improved to 350 A·m~(-2), which was 100 A·m~(-2) higher than previous current density of 250 A·m~(-2). Service life of industrial application achieved two years.
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