A new method of desulfurization of molten iron with magnesium vapor produced in-situ by aluminothermic reduction of magnesium oxide has been developed. Pellets containing magnesium oxide and aluminium were charged into a graphite tube. The tube was immersed into the molten iron to produce magnesium vapor, which was directly injected into the molten iron with Ar carrier gas to react with sulfur dissolved in it. The experimental results were analyzed with the mixed-control model of gas- and liquid-phase mass transfer. It is found that the magnesium desulfurization efficiency can be significantly improved by adjusting the initial magnesium molar ratio in the Mg-Ar bubble to the optimum value through changing the Ar carrier gas flow rate.
展开▼
