电解液质量对锌电积过程的影响及其在线控制

来源期刊：中国有色金属学报1998年第3期

论文作者：李仕雄 刘爱心

文章页码：519 - 522

关键词：锌电积； 添加剂； 自动控制

Key words：zinc electrodeposition ； additive； automatic control

摘    要：阐述了湿法炼锌过程中， 由于电解液中杂质的波动对锌电积过程主要技术经济指标产生的严重影响， 分析了金属杂质、骨胶浓度与阴极过电位和电流效率的关系， 提出了利用阴极过电位对锌电积最佳添加剂浓度及新液质量的控制方法。根据电极过程动力学原理，发明了电解液质量在线监控的方法和装置， 以实现自动控制添加剂的加入。 实际应用结果表明， 这种在线控制方法与传统的经验控制法相比，可使每吨析出锌电耗减少50.96～101.92 kWh， 电流效率提高2个百分点，锌电积车间酸雾浓度降低30%～50%， 提高特高品级电锌产量，大大降低剥锌劳动强度。

Abstract: In the hydrometallurgical process of zinc, the f luctuation of impurities concentration in the electrolyte has a serious influence on technical parameters. The dependence of cathodic overpotential and current efficiency on metal impurities and glue was studied. Accordingly, a method to control the impurity concentration and glue addition by measuring cathodic overpotential was invented. With this technique the additives can be automatically added and the electrolyte quality be kept under on-line control. The result of its application showed that, compared with the conventional operation, the energy consumption decreased by 50.96~101.92 kWh, current efficiency increased by 2%, and the concentration of acid smog reduced by 30%~50%. At the same time, the quality of electrolytic zinc was improved and zinc could be stripped readily.