Flotation of Chalcopyrite and Molybdenite by Means of Different Depressants: Review

This review delves into the critical process of separating chalcopyrite and molybdenite, two key minerals in the metal mining industry, through flotation.Effective separation of these minerals is paramount for maximizing copper and molybdenum recovery.The core focus is on the role of depressants in enhancing flotation selectivity.A comprehensive examination of various depressants employed in previous research is conducted to assess their efficacy in discriminating between chalcopyrite and molybdenite.The underlying mechanisms of depressant action, including surface chemistry and flotation kinetics, are explored in detail.Furthermore, the influence of operational parameters such as pH, solids concentration, and depressant combinations on flotation performance is investigated.While traditional inorganic depressants have been utilized for this purpose, they often pose environmental concerns due to their toxicity and limited biodegradability.This review highlights the potential of organic depressants as a more sustainable alternative.Research in recent times has focused on developing organic depressants that effectively separate these valuable sulfides.However, the optimal conditions for utilizing these novel depressants require further exploration.A crucial aspect of this review is the comparison between organic and inorganic depressants.It sheds light on the advantages of organic depressants, such as their eco-friendliness and potential for improved selectivity.Conversely, the review discusses the limitations of inorganic depressants, including their environmental impact and stricter regulations governing their usage due to environmental concerns imposed by regulatory bodies.By understanding the efficacy and limitations of both organic and inorganic depressants, this review aims to provide valuable insights for optimizing the flotation process for chalcopyrite and molybdenite separation.This knowledge can contribute to improved metal recovery, reduced environmental impact, and compliance with environmental regulations in the mining industry.Many countries strive for optimal metallurgical performance, yet not all possess the necessary knowledge or resources to achieve this objective.This review aims to assist readers in understanding key strategies for implementing environmentally friendly metallurgical processes.China, Chile, Japan, and Mexico have developed a certain expertise in advancing the understanding of green flotation processes.