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Abstract
A model for the behaviour of coal particles under conditions of the ROMELT liquid phase iron reduction smelting process is presented. Values of the main parameters of the model have been determined on the basis of experimental data. The model allows evaluation of the content and fractional composition of the coal mixed into the slag, for various fraction compositions of coal charged into the furnace and feeding rates. Characteristic dwell times of coal particles of various fractions in the slag and reaction rates with the environment have been determined. It is shown that the small particles of coal participate predominantly in iron reduction from the slag, and larger particles participate both in iron reduction and in combustion and gasification processes in the gas–liquid jets. The time for coal burnout from the slag has been evaluated for the case of interruption of coal charging into the furnace.