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Production methods, as well as blast furnace operation method of pulverized coal and blast furnace blowing for pulverized coal for blast furnaces blast
Production methods, as well as blast furnace operation method of pulverized coal and blast furnace blowing for pulverized coal for blast furnaces blast
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机译：煤粉的生产方法，高炉操作方法及高炉粉煤的高炉吹炼
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摘要
PROBLEM TO BE SOLVED: To provide: a pulverized coal for injection into a blast furnace that maintains combustibility in the blast furnace at a high level and is less apt to be caught even in a vent part of transport piping which is susceptible to blockage due to the pulverized coal; and a method for manufacturing the pulverized coal.SOLUTION: A pulverized coal 7 for injection into a blast furnace has a particle size distribution on a mass basis in which a mass ratio of particles whose particle size is 45 μm or less is 45 mass% or more, and a mass ratio of particles whose particle size is 325 μm or more is 1.5 mass% or more. The pulverised coal 7 for injection into the blast furnace is prepared. The pulverized coal 7 for injection into the blast furnace having the particle size distribution is prepared by mixing two kinds of pulverized particles 2a and 2b that are different in mass average granularity.
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