Activation of deadman state in blast furnace using deadman blowing method

Kazuya Kunitomo, Morimasa Ichida, Tsutomu Okada, Kazuyoshi Yamaguchi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In order to cope with superannuated coke ovens and to reduce pig iron cost, high-rate pulverized coal injection technology and operation technology utilizing inexpensive raw materials and fuels have been examined. The influence on the blast furnace operation to which such technology is applied is that gas permeability in a lower part of the blast furnace, especially inside the deadman of the blast furnace, deteriorates and the temperature of the part decreases. To lessen these drawbacks, new deadman methods for controlling temperature and improving gas permeability were developed. In one of these methods, called the "insert and blowing method", a pipe is inserted into the deadman through a tuyere and then hot gas is blown through the pipe. In another method, called the "boring and blowing method", a coke bed in a lower part of the furnace is bored using a pipe before hot gas is blown through an ordinary tuyere. To confirm and to evaluate the effects of these methods, many experiments using models have been conducted. The results show that gas permeability was improved and the temperature in the lower part of the models was increased. The effectiveness of these methods was increased by adding water vapor to the blowing air when the surface of the deadman was covered with fine coke or char.

Original languageEnglish
Pages (from-to)1212-1218
Number of pages7
Journalisij international
Volume42
Issue number11
DOIs
Publication statusPublished - Jan 1 2002

Fingerprint

Gas permeability
Blast furnaces
Blow molding
Chemical activation
Pipe
Coke
Gases
Pig iron
Coke ovens
Boring
Coal
Steam
Temperature
Water vapor
Raw materials
Furnaces
Air
Costs
Experiments

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Activation of deadman state in blast furnace using deadman blowing method. / Kunitomo, Kazuya; Ichida, Morimasa; Okada, Tsutomu; Yamaguchi, Kazuyoshi.

In: isij international, Vol. 42, No. 11, 01.01.2002, p. 1212-1218.

Research output: Contribution to journalArticle

Kunitomo, Kazuya ; Ichida, Morimasa ; Okada, Tsutomu ; Yamaguchi, Kazuyoshi. / Activation of deadman state in blast furnace using deadman blowing method. In: isij international. 2002 ; Vol. 42, No. 11. pp. 1212-1218.
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