Computational Investigation of Scrap Charging to the Blast Furnace

Peter Richard Austin, Hiroshi Nogami, Jun Ichiro Yagi

研究成果: Article査読

29 被引用数 (Scopus)

抄録

This paper examines the idea of using shredded scrap steel as a blast furnace burden material. Charging scrap, or metallics, with the burden offers several possible benefits including increased productivity and decreased fuel rate. In this paper, scrap charging is investigated numerically using a previously presented mathematical model. Furnace operations at both fixed hot metal temperature and fixed top gas temperature are investigated with scrap charged either near the axis, radially uniformly or near the wall. When the average temperature of metal entering the hearth is kept constant, the production and fuel rate are predicted to increase and decrease respectively as scrap feed rate increases. These changes are due to scrap being already fully reduced, thus not requiring heat or carbon for reduction. However, the top gas temperature decreases, particularly when scrap was charged only over the inner half radius of the furnace. Under conditions of constant top gas temperature the productivity and fuel rate still increase and decrease respectively with increasing scrap: ore ratio. Of the three scrap charging patterns tested, the optimum pattern is to charge scrap over the outer half radius of the furnace, which results in the least change in the furnace internal state compared to operations without scrap while showing significant increases in production and decreases in fuel rate. Finally, scrap diameter is found to have only a small effect on the furnace state.

本文言語English
ページ(範囲)697-703
ページ数7
ジャーナルIsij International
38
7
DOI
出版ステータスPublished - 1998

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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