| Abstract Scope |
Zinc-lead-bearing slag generated from zinc/lead production process is a valuable secondary resource, which contains poly-metals such as Pb, Zn, Sn, and Fe. It has significant potential for comprehensive utilization. For the target slag, a pilot-scale test employing a rotary hearth furnace (2.0 t/h) and subsequent EAF smelting separation (300 kVA) was performed in this study. Iron metallization reached 74% during reduction, whereas 88.67% Zn, 87.68% Pb, and 70.83% Sn volatilized. These heavy metals concentrated in flue dust at grades of 45.48% Zn, 25.62% Pb, and 4.78% Sn, this dust can serve as a premium alternative raw material for zinc/lead production. Following EAF smelting, molten iron exhibited 91.76% Fe content and 88.31% Fe recovery. Consumption rates of raw materials, fuel, and power were calculated from pilot-scale data, and a techno-economic analysis was performed to establish benchmarks for industrial-scale zinc-lead slag processing. |