Title

High pulverized coal injection rates at Fukuyama Works

High pulverized coal injection rates at Fukuyama Works

Authorship

WATANABE, T.; OKOCHI, I.; SAKAI, A.; SAKURAI, M.; SATO, M.; MURAI, R.

WATANABE, T.

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OKOCHI, I.

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SAKAI, A.

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SAKURAI, M.

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SATO, M.

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MURAI, R.

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DOI

10.5151/2594-357x-32 V01 - 241-250

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Abstract

To achieve a high rate injection of pulverized coal into a blast furnace, it is important to improve the coal combustibility, the raw materials’ properties and the in-furnace permeability. From this point of view, the following advanced technologies have been adopted by NKK Fukuyama No.3 blast furnace: the development of a new injection lance; the use of low SiO2 sinter; and the burden distribution control. On the basis of the above developments, a monthly average pulverized coal injection rate of 266 kg/t was successfully achieved in June 1998. Furthermore, a monthly average PCR 210 kg/t was achieved at Fukuyama blast furnaces (No.2,3,4,5BF) in June 2001.

To achieve a high rate injection of pulverized coal into a blast furnace, it is important to improve the coal combustibility, the raw materials’ properties and the in-furnace permeability. From this point of view, the following advanced technologies have been adopted by NKK Fukuyama No.3 blast furnace: the development of a new injection lance; the use of low SiO2 sinter; and the burden distribution control. On the basis of the above developments, a monthly average pulverized coal injection rate of 266 kg/t was successfully achieved in June 1998. Furthermore, a monthly average PCR 210 kg/t was achieved at Fukuyama blast furnaces (No.2,3,4,5BF) in June 2001.

Keywords

pulverized coal injection, coal combustibility, raw materials properties, blast furnace, permeability

pulverized coal injection, coal combustibility, raw materials properties, blast furnace, permeability