(p165) 1-Dimensional scrap melting model for steel converter (BOF)

摘要

The primary goal in steel converter operation is the removal of carbon from the hot metal. This is achieved byblowing oxygen into the melt. The oxidation of carbon produces a lot of heat. To avoid too high temperaturesin the melt cold scrap (recycled steel) is charged into the converter. The melting rate is affected by heat andcarbon mass transfer. A process model for steel converter is in development. This model is divided intoseveral modules, which are fluid dynamics, heat- and mass-transfer, scrap melting and chemical reactions. Anumerical domain for the fluid dynamics is 2-D axisymmetric and it includes the hot metal phase. This articlefocuses on the development of the scrap melting module. A numerical model for calculating temperature andcarbon concentration in the melt is presented. The aim is to predict the melting rate of the scrap including theproperties of the hot metal. The model is tested by calculating the melting rates for different scrapthicknesses.