一、概述高纯度镍以纯金属或特种合金的形态,广泛应用于无线电、原子能及喷气技术等现代工业中,随着这些新兴工业部门的出现和发展,对镍的数量和质量方面的要求越来越高,因此,在工业规模上生产高纯度镍的必要性也日益迫切。为了生产高纯度镍,国外通常采用相当纯净的镍甚至电解镍作阳极;并且在电解过程中,阳极液净化流程十分复杂,往往同时使用置换沉淀、水解沉淀、硫化沉淀、电解净化、离子交换、液—液萃取等几种分离方法。其结果导致生产周期长、试剂消耗大、镍的直接回收率低、产品成本高等一系列缺点,难于在工 I. INTRODUCTION High-purity nickel takes the form of pure metal or special alloy and is widely used in modern industries such as radio, atomic energy and jet technology. With the appearance and development of these new industrial sectors, the requirements for the quantity and quality of nickel are more and more Therefore, the necessity of producing high-purity nickel on an industrial scale is also becoming increasingly urgent. In order to produce high-purity nickel, relatively pure nickel or even electrolytic nickel is usually used as an anode in foreign countries. In the electrolysis process, the anolyte purification process is very complicated, often using simultaneous displacement precipitation, hydrolytic precipitation, sulfide precipitation, electrolytic purification, ion exchange, Liquid - liquid extraction and other separation methods. The result is a series of shortcomings of long production cycles, expensive reagents, low direct nickel recovery, high product costs,