Hiroshi Nogami

Abstract:

In recent years, many approaches have been made to reduce the environmental impact of iron and steelmaking industries. Replacement of reducing agents and reaction control of blast furnace are expected to decrease the greenhouse gas emission. Under such operation, internal states of the blast furnace changes drastically, thus the operation conditions should be carefully adjusted. Kinetic-based mathematical simulation is one of the useful tools for design and optimization of blast furnace operation. This paper first summarizes the outline of the blast furnace model and the reaction sub-models for reduction of iron ore and gasification of coke. Then the characteristics and utilizing methods of these models are introduced. Namely effect of coke substrate reactivity on intra-particle reaction progress of coke, and the effect of reducing gas on the form of reaction of iron oxide reduction. Finally, the recent approaches to the iron ore reduction under the scales of particle and burden layer are introduced.