| Abstract Scope |
In the Basic Oxygen Furnace (BOF) steelmaking process, large quantities of slag are generated, which are sometimes used as by-products, but in many cases, BOF slag is landfilled and thus seen as waste. Typical contained elements are chromium, manganese, and phosphorus aside from the main slag formers, such as iron-, calcium-, and silicon oxides. Following the goals of sustainability, a major target is the recovery of these elements by modification of the phase formation during cooling to generate artificial minerals which are separable in a subsequent beneficiation step. The paper describes investigations on the formation of mineral phases as a function of the thermal conditions during the slag cooling. Furthermore, the behaviour of the slag was determined when additives such as TiO2 or Al2O3 were added. The evaluation of the enrichment of valuable metals in mineral phases was done with EDX mappings of the scanning electron microscope. |