Pulverized Coal Combustion in High Temperature Furnaces for the Steel Making : First Report: Evaluation Method of Combustibility for Pulverized Coal

概要

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The combustibility of pulverized coal has been studied for the injection of fuel into the blast furnace which is operated under the combustion conditions of the highest temperature and the highest velocity in the steel industry. The combustion efficiency of pulverized coal containing volatile matter ranging from 20% to 40% is from 59% to 93% at the position where the combustion of heavy oil is completed. The combustion efficiency increases with an increasing volatile matter content. Combustibility was determined using ash or titanium as a tracer and by gas analysis methods based on CO_2 production or O_2 consumption. The results indicate that the degree of oxidation coincides with the fraction burned by a titanium tracer method.
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