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SUSPENSION REDUCTION TECHNOLOGY FOR IRONMAKING WITH LOW ENERGY REQUIREMENT AND CO 2 EMISSION

A new ironmaking technology based on iron oxide concentrate under development at the University of Utah could reduce energy consumption by 38% of the amount required by the blast furnace process and lower environmental pollution, especially CO 2 emission, from the steel industry. The blast furnace has a number of disadvantages. Most important of these are energy consumption and CO 2 emission. Much of the energy consumption in blast furnace is associated with cokemaking, which also is a source of pollution. The new technology bypasses cokemaking as well as pelletization or sintering of iron ores. The reduction of iron oxide by hydrogen has been much investigated. Some of the previous studies indicated that the reduction rate might not be fast enough for a suspension reduction process to be possible. New kinetic data on the reduction of fine concentrate particles in the temperature range of 900 - 1400 o C by hydrogen-containing gases are presented.