Abstract
The paper provides calculations of the Romelt furnace performance when using iron ores and coals of different composition. It was shown that at a given value of heat flux from the post-combustion zone into slag bath, furnace performance depends not only on the iron content of ore, but also on the fixed carbon content of coal. A regression equation was developed to reflect the dependence of the specific performance on these parameters. It was shown that the coal quality has a greater impact on furnace performance when the iron content of ore is low. It was found that if the iron content of ore increases, a relative decrease in specific consumption of coal and oxygen is the same for all coals. It was shown that the degree of post-combustion of gases weakly depends on the iron content of ore, and is mainly determined by the composition of utilized coal.
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