PYRITE LEACHING BEHAVIOUR UNDER CESL PROCESS CONDITIONS

The varying amounts of pyrite in copper concentrates processed through the CESL (Concentrated, Efficient, Sustainable and Low-cost) Process significantly impact both capital and operating costs, making it a critical variable in the treatment of copper concentrates. This paper aims to explore the operating conditions influencing the extent of pyrite oxidation and the associated chemical reactions under CESL conditions. Through a detailed examination of reaction stoichiometry and the thermodynamics of oxidation, the study identifies key factors affecting the pyrite leaching behavior, emphasizing the consequences of sulfur oxidation on process efficiency and cost. The findings indicate that the reduced oxidation of sulfur during the CESL Process is beneficial for controlling reagent consumption and minimizing unwanted byproducts. Understanding the reaction pathways and kinetics provides insights into optimizing the leaching process and improving overall recovery rates of valuable metals. The results highlight the importance of accurately modeling systems like Metsim to incorporate these variables effectively. Consequently, this research contributes valuable knowledge towards enhancing the economic viability of hydrometallurgical processes for copper recovery.