【摘要】 研究了氧气对除钴的影响,并试图采用亚硫酸钠来消除氧气的影响。研究了亚硫酸钠的浓度对除钴效率的影响。采用EPMA分析锌粉置换渣,结果表明,Na2SO3量大时,元素硫吸附在锌粉表面形成钝化层,除钴反而降低;量太小时,又起不到消耗氧的作用,所以100mg.L-1Na2SO3比较适合,它对除钴效率的提高可以起到一定的作用,因此可以作为硫酸锌溶液杂质深度净化除钴的一种辅助添加剂。更多还原

【Abstract】 Although the solubility of oxygen in zinc electrolyte is less than 9 mg·L-1,its effect on deposit stability and zinc dust consumption can be significant.Sodium sulfite is used to deoxygenate the electrolyte.The effect of the sodium sulfite concentration on cobalt removal was investigated.The results show the reduction sodium sulfite to sulfur which adheres to the zinc dust surface forming a passivating layer.And small amounts of sodium sulfite has no effect on the cobalt removal.The optimum amount of sodium sulfite is 100m g·L-1.It is an important consideration in purification circuits to use sodium sulfite as an additive to cobalt cementation.更多还原