Simulated solution condition experiment and process design for copper deep removal from nickel anodes based on ion-exchange

Abstract

Removing copper from nickel electrolysis anode solution has been a major keypoint in the nickel metallurgy industry. In this study, we proposed a novel process flow to promote removing copper from nickel electrolysis anode solution. A simulated nickel anode solution was designed, and static and dynamic adsorption experiments were conducted to determine the best of solution pH, adsorption time and temperature, resin dosage and particle size, and stirring speed. The optimal conditions were explored for copper removal from nickel electrolysis anode solution. Based on the optimal experimental conditions and the relevant experimental data, a novel process for copper removal from nickel electrolysis anodes was designed and obtained. This novel process of copper removal from nickel electrolysis anodes was confirmed with nickel anolyte solution with nickel 50–60 g/L and copper 0.5 g/L. After finishing the novel process of copper removal, the nickel in the purified nickel anolyte became undetectable and copper concentration was 3 mg/L, the novel process of resin adsorption to remove copper from nickel anode solution through static and dynamic adsorptions has an efficacious copper removal. It is a beneficial supplement to traditional methods.

摘要

镍电解阳极液去铜是镍冶金工业的重要环节, 目前去效果仍不佳。本研究探讨一种新的工艺流 程提高镍电解阳极液铜去除效果。设计模拟镍阳极液体系, 进行静态和动态吸附实验, 确定镍阳极液 的最佳pH值、吸附时间和温度、树脂用量和粒径以及搅拌速度。明确镍电解阳极溶液去铜最佳工艺 条件。依据最佳实验条件和相关实验数据, 设计并获得了一种新的镍电解阳极除铜工艺流程。并用镍 含量为50~60g/L、铜含量为0.5g/L 的镍阳极液对镍电解阳极除铜的新工艺进行了验证。利用新的镍电 解阳极液和除铜工艺, 可获得纯镍阳极液中镍含量为不可检测、铜含量为3mg/L 的效果。本文设计的 树脂吸附加静态和动态吸附去铜工艺流程, 对去除镍电解阳极液铜具有极佳的效果。该工艺流程是改 良传统镍冶金除铜方法的一种新尝试。