Agenda for low reducing agent operation of blast furnace: Thermophysical properties of molten slags on the gas permeability at the dripping zone of blast furnace

Miyuki Hayashi, Sohei Sukenaga, Ko Ichiro Ohno, Shigeru Ueda, Kohei Sunahara, Noritaka Saito

研究成果: ジャーナルへの寄稿記事

17 引用 (Scopus)

抄録

Currently, low reducing agent operation of blast furnace is actively investigated in order to reduce CO2 emission. However, low reducing agent operation accelerates coke wear, resulting in the decrease in the void fraction in the blast furnace. Particularly, at the dripping zone, the decrement in the void fraction increases the hold-up amount of liquid burden. As a consequence, the gas permeability at the dripping zone becomes lower dramatically. In the present paper, we have focused on the effect of thermophysical properties of molten slags on the gas pressure drop and the liquid hold-up, the measures of the gas permeability, in the counter-current region of gas-liquid flow. It has been considered from the results of hold-up experiments and/or simulations that the surface tensions of molten slags and their contact angles against carbonaceous materials are the most significant properties for the gas pressure drop as well as the liquid hold-up. The previous studies with respect to their properties have been reviewed for the slag compositions and the temperatures close to those at the dripping zone.

元の言語英語
ページ(範囲)211-226
ページ数16
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
100
発行部数2
DOI
出版物ステータス出版済み - 2 14 2014

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Gas permeability
slags
Reducing Agents
thermophysical properties
Reducing agents
blasts
Blast furnaces
Slags
furnaces
Molten materials
permeability
Thermodynamic properties
pressure drop
gas pressure
Void fraction
voids
Gases
Liquids
liquids
gases

All Science Journal Classification (ASJC) codes

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

これを引用

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abstract = "Currently, low reducing agent operation of blast furnace is actively investigated in order to reduce CO2 emission. However, low reducing agent operation accelerates coke wear, resulting in the decrease in the void fraction in the blast furnace. Particularly, at the dripping zone, the decrement in the void fraction increases the hold-up amount of liquid burden. As a consequence, the gas permeability at the dripping zone becomes lower dramatically. In the present paper, we have focused on the effect of thermophysical properties of molten slags on the gas pressure drop and the liquid hold-up, the measures of the gas permeability, in the counter-current region of gas-liquid flow. It has been considered from the results of hold-up experiments and/or simulations that the surface tensions of molten slags and their contact angles against carbonaceous materials are the most significant properties for the gas pressure drop as well as the liquid hold-up. The previous studies with respect to their properties have been reviewed for the slag compositions and the temperatures close to those at the dripping zone.",
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AU - Hayashi, Miyuki

AU - Sukenaga, Sohei

AU - Ohno, Ko Ichiro

AU - Ueda, Shigeru

AU - Sunahara, Kohei

AU - Saito, Noritaka

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