製銑工程におけるエネルギー消費削減を目指した酸素高炉の展開

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書誌事項

タイトル別名
  • Perspective on Progressive Development of Oxygen Blast Furnace for Energy Saving
  • セイセン コウテイ ニ オケル エネルギー ショウヒ サクゲン オ メザシタ サンソ コウロ ノ テンカイ

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説明

The importance of energy saving in the ironmaking process is widely recognized. Many energy saving efforts related to ironmaking have already been carried out, and further energy savings by conventional methods are hardly to be expected. The oxygen blast furnace is considered to be a promising process in terms of flexibility of energy use and advantages related to CO2 mitigation. Focusing on energy saving, in this study, the optimum configuration of the ironmaking process based on the oxygen blast furnace was investigated by numerical approaches and case studies.<br> First, because productivity can be greatly improved in the oxygen blast furnace, blast furnace inner volume can be reduced while maintaining the same production rate. Because the downsized oxygen blast furnace makes it possible to relax burden material strength requirements, energy consumption for agglomeration in the coke oven and sintering machine can also be reduced. Therefore, a DEM simulation was carried out to confirm the effect of the burden load reduction in the downsized condition. It was found that the compressive stress in the downsized oxygen blast furnace was 20-30% less than that in the conventional blast furnace. The energy flow in the ironmaking process was also investigated by using a material and energy balance model, considering the functions of an integrated steel works. It was found that the energy consumption of the ironmaking process based on the energy saving oxygen blast furnace could be reduced by 5.3% while maintaining the same energy supply to downstream processes.

収録刊行物

  • 鉄と鋼

    鉄と鋼 102 (7), 365-374, 2016

    一般社団法人 日本鉄鋼協会

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