A Coupling Dynamic Model for Dissolution and Reduction of Chromium Ore in a Smelting Reduction Converter

For describing and resolving the process of chromium ore smelting reduction in a converter preferably, the coupling dynamic model was established based on the kinetic models of chromium ore dissolution and interfacial reducing reaction between the slag and metal. When 150 t stainless steel crude melts with chromium of 12 % are produced in a smelting reduction converter with no initial chromium in metal at 1560 °C, the results of the coupling dynamic model show that the mean reduction rate and injection rate of chromium ore are 0.091 % · min−1 and 467 kg · min−1, respectively. The foundation of the coupling dynamic model provides a reference and basis on the constitution of rational processing route for a practical stainless steelmaking.