Abstract
A multi-step process has been developed for the recovery of metal values from vanadium-bearing converter slag. A beneficiation process combined with grinding, sieving and magnetic separation steps was firstly utilized to recover metallic iron from the vanadium-bearing converter slag. Then a calcification roasting–acid leaching process was developed to recover vanadium from the vanadium slag, forming vanadium-bearing solution and vanadium tailings. The vanadium-bearing solution can be further used to recover vanadium, and the vanadium tailings were treated by a carbothermic reduction–magnetic separation process, which generated two products, viz. ferroalloy and titanium concentrate. The ferroalloy can be used as raw materials for the steelmaking process whereas the titanium concentrate can be taken for Ti recovery. The results showed that the majority of iron, vanadium, chromium, and titanium in the vanadium-bearing converter slag can be fully recycled in such a comprehensive recovery process.
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