Effect of slag melting behavior on metal-slag separation temperature in powdery iron, slag and carbon mixture

Ko-Ichiro Ohno, Masashi Kaimoto, Takayuki Maeda, Koki Nishiokoka, Masakata Shimizu

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

Utilization of self reducing pellet in blast furnace is one of the effective technologies to mitigate the CO2 emissions in the steel industry. However, there are not sufficient researches on how the pellet behaves around cohesive zone. Therefore, purpose of this study is to clarify the effect of slag melting behavior on metal-slag separation behavior. In order to simulate the behavior around cohesive zone, electrolytic iron powder, carbon powder, and synthetic slag were prepared as reduced iron, residual carbon and slag components, respectively. They were well mixed as given mass ratios decided from the composition of the self reducing pellet. Different kinds of slag compositions were adopted to change properties, such as melting temperature and viscosity. The mixtures were pressed into tablets and used as experimental samples. "In-situ" observations of metal-slag separation behavior in the mixtures during constant rate heating were done by a laser microscope combined with infra-red furnace and metal-slag separation temperatures were decided. Following results were obtained. The metal-slag separation behavior was dominated largely by agglomeration behavior of liquid phase of iron. The separation surely occurred when both phases of iron and slag change to liquid phases. At the same time, the separation could also occur even if a small amount of solid phases still remained in the mixture. In this experimental condition, the effect of slag melting temperature on the separation was larger than the effect of slag's viscosity.

元の言語英語
ページ(範囲)634-640
ページ数7
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
98
発行部数12
DOI
出版物ステータス出版済み - 12 12 2012

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slags
Slags
Melting
Carbon
Iron
Metals
melting
iron
carbon
metals
Temperature
temperature
pellets
furnaces
Melting point
Infrared furnaces
liquid phases
Viscosity
viscosity
Iron powder

All Science Journal Classification (ASJC) codes

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

これを引用

Effect of slag melting behavior on metal-slag separation temperature in powdery iron, slag and carbon mixture. / Ohno, Ko-Ichiro; Kaimoto, Masashi; Maeda, Takayuki; Nishiokoka, Koki; Shimizu, Masakata.

:: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 巻 98, 番号 12, 12.12.2012, p. 634-640.

研究成果: ジャーナルへの寄稿記事

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