Effects of volatile matter of pulverized coal on reducing agents rate of blast furnace and combustion behavior of coal mixture

Kazuya Kunitomo, Takashi Orimoto, Tsunehisa Nishimura, Masaaki Naito, Jun Ichiro Yagi

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The effective calorific value of pulverized coal in a temperature region over 1400°C in the blast furnace was examined, and it was shown that in an operation in which the heat balance in the lower part of the blast furnace was a rate-controlling factor, a pulverized coal having a lower average volatile matter content was effective in lowering the reducing agents rate. However, there is a restriction in the amount of the resource of semi-anthracite coal whose volatile matter is relatively low, we examined a mixed pulverized coal obtained by mixing a high and low volatile matter content coals. The combustion behavior of the mixed pulverized coal was examined by conducting a combustion experiment and a simulation analysis. It was found that when a mixed coal obtained by mixing coals of different volatile matter contents was used, the combustion temperature of the mixed coal deviated toward the high temperature side from a weighted average value of temperatures obtained when each of the coals of different volatile matter contents was burned individually, and that the use of the mixed pulverized coal showed a remarkable effect on the promotion of temperature rise particularly in the initial period. This was because the high volatile matter content coal formed a high-temperature combustion field and promoted the combustion of the low volatile matter content coal.

Original languageEnglish
Pages (from-to)190-197
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume90
Issue number4
DOIs
Publication statusPublished - Jan 1 2004
Externally publishedYes

Fingerprint

Coal
Reducing Agents
Reducing agents
blasts
Blast furnaces
coal
furnaces
Temperature
anthracite
combustion temperature
heat balance
Calorific value
Anthracite
promotion
temperature
constrictions
resources

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Cite this

Effects of volatile matter of pulverized coal on reducing agents rate of blast furnace and combustion behavior of coal mixture. / Kunitomo, Kazuya; Orimoto, Takashi; Nishimura, Tsunehisa; Naito, Masaaki; Yagi, Jun Ichiro.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 90, No. 4, 01.01.2004, p. 190-197.

Research output: Contribution to journalArticle

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