Cobalt in Complex Ores: Occurrence Characteristics and Flotation-Based Beneficiation

Cobalt holds significant strategic importance due to its indispensable technological advantages across various industrial sectors, notably in rechargeable batteries and high-temperature alloys. With the burgeoning expansion of the electric vehicle industry, considerable debate surrounds the capability of cobalt production to satisfy the swiftly escalating demand. Cobalt is generally recovered as a by-product from copper-, nickel-, and iron-bearing deposits, as independent cobalt deposits are relatively uncommon. Its occurrence is characterized by complexity, compounded by low ore grades, necessitating a plethora of extraction methods and processes. However, the complex occurrence of cobalt in associated ore systems makes selective beneficiation challenging, leading to incomplete recovery and considerable cobalt losses during flotation-based processing. This paper initiates by delineating beneficiation methods for distinct cobalt-containing ores, with detailed scrutiny of flotation processes pertinent to copper-cobalt sulfide and nickel-copper sulfide ores. A comprehensive overview and assessment are provided for the collectors, foaming agents, and regulators utilized in flotation. Overall, this review highlights the complex occurrence characteristics of cobalt in associated ore systems and underscores the critical role of flotation-based beneficiation and reagent optimization in improving recovery efficiency and reducing cobalt losses in industrial processing.