Randomized trial demonstrates selective recovery of Cu, Ni, and Co from copper slag using flotation tailings, indicating efficient resource utilization.
Key Points
This research evaluates an innovative method for extracting valuable metals from copper smelter slag using flotation tailings.
Employs a sulfation roasting approach using flotation tailings as sulfur source and sodium metabisulfite as promoter.
Analyzes the impact of roasting temperature, time, slag-to-tailings ratio, SMBS dosage, and leaching conditions.
Achieves high extraction efficiencies of metals with low iron dissolution.
Under optimal conditions, extraction rates reached 85.5% Cu, 81.6% Ni, and 87.1% Co.
Fe dissolution remained under 5%, indicating high selectivity for desired metals.
Thermodynamic analysis supports the process's feasibility at the evaluated temperature range.