NOUFERROUS METALLURGICAL EQUIPMENT

To address the issues of high cost and significant pollution associated with traditional reducing agents (diesel oil and domestic low-sulfur coal) used in anode refining, this study investigates the feasibility of using local low-sulfur lignite in Zambia (with a total sulfur content of 0.5%~1.0%, dry ash-free volatile matter of 18.02%~21.03%, and fixed carbon content of 56%~58%) as an alternative reducing agent. 〖JP2〗By systematically analyzing the reduction principle of copper anode refining and the mechanism of sulfurs impact on anode plate quality, the study focuses on examining the behavior and role of key components in low-sulfur lignite (such as ash, fixed carbon, and volatile matter) during the reduction process, and optimizes the core control parameter of copper liquid oxygen content at 1300±200 ppm. The research results show that when low-sulfur lignite is used as the reducing agent for anode refining, the qualification rate of copper in anode plates can be stably controlled above 99.49%, and the unit cost of the reducing agent decreases by 83%. While reducing costs and improving efficiency, it also takes into account occupational health and environmental protection, thus possessing good promotion value.