A potential industrial waste waste co tr

This study presents an innovative industrial waste–waste co-treatment process that utilizes waste SO2 gas and residue heat to recover valuable metals, specifically cobalt (Co), nickel (Ni), and copper (Cu), from copper smelting slag. The primary objective was to evaluate the efficacy of this method in metal extraction and to define the reaction mechanisms involved in the sulfation roasting followed by water leaching process. Utilizing a series of experimental designs, the researchers optimized the conditions under which the metal extraction yields could be maximized. The results demonstrated that the extraction rates for Ni, Co, and Cu achieved impressive values of 95.8%, 91.8%, and 81.6%, respectively, indicating a highly efficient recovery process. Additionally, this method proposes a sustainable approach by considering both energy flow and material flow, significantly contributing to environmentally friendly industrial practices. Overall, the findings indicate that the proposed co-treatment process could serve as a viable alternative for managing industrial waste while simultaneously recovering high-value metals, thereby aligning with contemporary sustainability goals.