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川崎製鉄技報
KAWASAKI STEEL GIHO
Vol.3 (1971) No.4
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燃料および還元ガス高炉吹込みの羽口領域熱収支に対する影響
Effects of Fuels and Reformed Gas Injection on the Thermal Balance at the Tuyere Level of the Blast Furnace

平谷 達雄(Tatuo Hiratani)
要旨 :
炭化水素(重油,天然ガス)および還元ガスの高炉吹込みにともなう炉内還元反応の変化を解析するため,いくつかの基本事項と吹込技術上の問題点の検討をおこなった。炉床の熱レベルを表わすパラメター(R)をヴィスタイトの間接,直接還元率をもとめて決定し,ガス利用率,送風圧との関係をしらべた。またボッシュガス中のH2成分の炉内圧力損失に対する影響についても検討した。還元ガスを吹込んだ時の効果を,燃料(変成しない場合)吹込みの場合と比較しつつ検討した。
Synopsis :
The purpose of this paper is to provide a basis for studies of various factors contributing to changes in reduction process of the blast furnace by hydrocarbon injections. The specific difficulties pertaining to the use of each of the fuel oil, gaseous fuel and reformed gas are examined. Of greatest significance is the additional cooling of the furnace which occurs as the fuel oil, gaseous fuel and reformed gas are injected in place of coke. The parameter which represents the thermal level of the hearth 'R' is employed for counting both indirect and direct reduction at the lower part of the furnace. The effect of H2 content in bosh gas on the pressure loss through the furnace burden is evaluated. An effort was also made to elucidate some of uncertainties about the blast furnace performance when the reformed gas is used.
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