ABSTRACT

Nickel is a strategic element whose production and consumption in over a decade has increased to over 39% and 71%, respectively. Generally, due to their complex mineralogy, laterites, the current attractive source of Ni, are subjected to hydrometallurgy and pyrometallurgy techniques without enrichment in order to extract Ni. Therefore, numerous investigations in vogue on laterite enrichment performed spanning from 1964 to date were reviewed in this article, and the future directions were proposed through critical synthesis. The possibilities of obtaining both higher recoveries and increase in grade for Ni were noticed using selective comminution-classification method followed by flocculation-flotation strategy. Hence, in order to improve on the reported Ni yields from selective comminution-classification process, one of the ways could be to subject the ore to a multi-stage selective comminution-classification method followed by subjecting the obtained concentrate to flocculation-flotation technique. Therefore, the findings of this investigation would aid in upscaling the production to meet the demand.

摘要

镍是战略元素，十多年来其产量和消费量分别增长至39%和71%以上。一般来说，由于其复杂的矿物学，目前有吸引力的镍来源红土矿需要经过湿法冶金和火法冶金技术而不进行富集来提取镍。因此，本文回顾了从 1964 年至今进行的大量关于红土富集的流行研究，并通过批判性综合提出了未来的方向。注意到使用选择性粉碎-分级方法和随后的絮凝-浮选策略获得更高回收率和提高镍品位的可能性。因此，为了提高选择性粉碎分级过程中报道的镍产量，其中一种方法可能是对矿石进行多级选择性粉碎-分级方法，然后对获得的精矿进行絮凝-浮选技术。因此，本次调查的结果将有助于扩大生产规模以满足需求。