ABSTRACT

The following review is the second part of a series concerned with the direct hydrometallurgical processing of nickel sulfide flotation concentrates. In the first part of this series, piloted leaching processes and commercial nickel sulfide operations which employed direct hydrometallurgical processing were comprehensively reviewed. In Part II of this series, laboratory investigations into the pressure leaching of nickeliferous sulfide concentrates are critically analyzed. From this review, it is apparent that sulfuric acid pressure leaching processes have received the most attention relative to other lixiviant systems such as ammonia/ammonium, chloride, and nitric acid. This is likely due to the numerous technical advantages sulfate-based leaching systems offers relative to other lixiviants. Laboratory investigations into atmospheric concentrate leaching processes are explored in Part III of this series.

摘要

以下综述是有关硫化镍浮选精矿直接湿法冶金加工系列的第二部分。在本系列的第一部分中，全面回顾了采用直接湿法冶金工艺的试点浸出工艺和商业硫化镍操作。在本系列的第二部分中，对含镍硫化物精矿压力浸出的实验室研究进行了批判性分析。从这篇综述中可以看出，相对于其他浸出系统（例如氨/铵、氯化物和硝酸），硫酸加压浸出工艺显然受到了最多的关注。这可能是由于硫酸盐浸出系统相对于其他浸出剂具有众多技术优势。