Wetting and penetration behavior of calcium ferrite melts to sintered hematite

Kunihiko Nakashima, Noritaka Saito, Shurisuke Shinozaki, Ryuji Tanaka, Takayuki Maeda, Masakata Shimizu, Katsumi Mori

研究成果: Contribution to journalArticle査読

28 被引用数 (Scopus)

抄録

Effects of adding SiO2 or Al2O3 on the wetting and penetration characteristics of calcium ferrite melts, CaO · Fe2O3 (CF) and CaO · Fe2O 3(CF2), to sintered hematite substrate have been examined. And the wetting and penetration characteristics were discussed from the viewpoints of the relation to the viscosity and surface tension of calcium ferrite melts. The effects of the addition of calcium ferrite slag with SiO 2 or Al2O3 on the strength of sintered hematite pellets were also examined. The slag tablets of CF2-based slag neither melt completely nor spread uniformly on the hematite substrate at the experimental temperature at 1 300°C in this study. The wettability of CF-based slag melts on sintered hematite substrate was improved by the addition of Si2 or Al2O3, and the spreading rate was increased with increasing the value of 77/7 (viscosity/surface tension of slag melts). The penetration of CF-based slag melts into sintered hematite substrate was depressed by the addition of SiO2 or Al2O 3, and the penetration depth was increased with increasing the value of η/γ surface tension/ viscosity of slag melts). The sintered hematite pellet with CF-5 mass%Al2O3 slag sintered at 1 200°C had the highest compressive strength in this study. Because the liquidus temperature of CF slag is decreased to about 1 200°C by adding 5 mass% Al2O3, and the sufficient amount of liquid phase, which has the appropriate wetting and penetrating characteristics controlled by the surface tension and the viscosity, as a binder was formed.

本文言語英語
ページ(範囲)2052-2056
ページ数5
ジャーナルisij international
44
12
DOI
出版ステータス出版済み - 2004

All Science Journal Classification (ASJC) codes

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

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