BLAST FURNACE OPERATION METHOD AND BLAST FURNACE INCIDENTAL FACILITY

• Main Authors: ISHII JUN, MORITA YUYA, MOMONO KOICHI, NOUCHI TAIHEI, KAWAJIRI YUKI, OZAWA SUMIHITO, TSUTSUMI KOICHI, TAKAHASHI KOICHI
• Format: Patent
• Language: English; Japanese
• Published: 30.09.2021
• Subjects: CHEMISTRY; MANUFACTURE OF IRON OR STEEL; METALLURGY; METALLURGY OF IRON

To provide a blast furnace operation method which can further reduce a discharge amount of carbon dioxide (CO2) from a blast furnace while being stably operated.SOLUTION: A blast furnace operation method includes: a step of producing pyrolysis gas generated by pyrolysis of biomass and steam reformed gas using steam; a step of producing regeneration gas using blast furnace gas and hydrogen gas using the steam reformed gas as a supply source; and a step of blowing blowing gas and a reduction material into the blast furnace from a tuyere of the blast furnace, in which oxygen gas is used as the blowing gas, and the regeneration methane gas is used in at least a part of the reduction material.SELECTED DRAWING: Figure 1 【課題】安定した操業の下、高炉からの二酸化炭素（ＣＯ２）の排出量の一層の削減が可能な高炉の操業方法を提供する。【解決手段】バイオマスの熱分解により発生する熱分解ガス、および、水蒸気を用いて、水蒸気改質ガスを生成する工程と、高炉ガス、および、水蒸気改質ガスを供給源とする水素ガスを用いて、再生メタンガスを生成する工程と、高炉の羽口から高炉内に送風ガスおよび還元材を吹込む工程と、を有し、送風ガスとして酸素ガスを用い、かつ、還元材の少なくとも一部に再生メタンガスを用いる。【選択図】図１