Model predictions of the liquidus surface of multi-component iron silicate smelting slags containing magnesia and calcia

摘要

Non-ferrous smelting slags can contain magnesia, which substantially increases the liquidus temperature. One option to counter this increase is to flux with calcia. In this work, experimental liquidus measurements including new measurements onindustrial slags have been compared with a FACT-based thermodynamic model, which predicts the liquidus surface of multi-component iron silicate smelting slags containing both magnesia and calcia. The predictions, which agree well with experimentalresults, are summarized in both isothermal and non-isothermal diagrams to give a quantitative description of the liquidus surface.