Recent Progress and Future Prospects in Blast Furnace Fuel Injection

Ikegami, Heiji

doi:10.2355/tetsutohagane1955.58.5_559

Cited by 2 publications

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“…The hydrogen-rich fuel injected into the blast furnace increases the H 2 content in the gas composition and improves its reduction ability, and the reduction process produces H 2 O as gaseous effluent to reduce CO 2 emissions. However, the differences in calorific value, carbon, hydrogen content, endothermic and other chemical composition and temperature of different hydrogen-rich fuels lead to the difference of coke replacement ratio [39][40][41][42]. The corresponding relationship is shown in Table 1.…”

Section: Influencing Factors Of Replacement Ratio Of Fuels Injectionmentioning

confidence: 99%

Review of hydrogen-rich ironmaking technology in blast furnace

Chen

Zuo

2021

Ironmaking & Steelmaking

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The global warming promotes the steel industry to replace part of coke by injecting hydrogen-rich fuel into the blast furnace to reduce CO 2 emissions and energy consumption. In this paper, the injected hydrogen-rich fuels and effects of hydrogen-rich smelting on burden reduction and property evolution were introduced, and the hot events related to hydrogen metallurgy were summarized. Increasing hydrogen content changes the thermodynamic and kinetic conditions of chemical reactions, changing the reduction behaviour of iron oxides and affecting the burden properties evolution and soft melting behaviour. Correspondingly the coke solution loss alters due to more H 2 O existence. In addition, the temperature and gas flow distribution are altered, affecting the iron oxide reduction rate and efficiency of blast furnace operation process. At present, some hydrogen metallurgy projects have been launched, making expected progress, which provides reference and thinking for the large-scale industrial application of hydrogen in blast furnace.

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Section: Influencing Factors Of Replacement Ratio Of Fuels Injectionmentioning

confidence: 99%

Review of hydrogen-rich ironmaking technology in blast furnace

Chen

Zuo

2021

Ironmaking & Steelmaking

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Ironmaking Technology for the Last 100 Years: Deployment to Advanced Technologies from Introduction of Technological Know-how, and Evolution to Next-generation Process

Naito

Takeda²,

Matsui³

2015

ISIJ International

106

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The 150 year history of the Japanese steel industry dates from the first western blast furnace, which was built by T. Ohashi in 1857. Modern blast furnace operation at integrated steel works in Japan started in 1901 with the first blow-in of Higashida No. 1 blast furnace at Yawata Steel Works. Throughout the prewar and postwar periods, the steel industry has supported the Japanese economy as a key industry which supplies basic materials for social infrastructure and development.After the period of recovery following the destruction caused by World War II, Chiba Works of Kawasaki Steel Corporation (now JFE Steel Corporation) was built and began operation in 1953 as the first integrated steel works in the Keiyo Industrial Region after the war. During Japan's period of high economic growth, many coastal steel works with large blast furnaces having inner volumes of more than 3 000 m 3 and even 5 000 m 3 were built to enable efficient marine transportation of raw materials and steel products. Japanese steel makers introduced and improved the most advanced technologies of the day, which included high pressure equipment, stave cooler systems, bell-less charging systems, etc. As a result, Japanese steel works now lead the world in low reducing agent rate (RAR) operation, energy saving, and long service life of blast furnaces and coke ovens.Following the Oil Crises of the 1970s, the Japanese steel industry changed energy sources from oil to coal and implemented cost-oriented operation design and technology. In 2012, the Japanese steel industry produced approximately 80 million tons of hot metal from 27 blast furnaces, including large-scale furnaces with inner volumes over 5 000 m 3 . During this period, the industry has faced many economic and social challenges, such as the high exchange rate of the yen, oligopoly in the mining industry, global warming, and the surge in iron ore and coal prices driven by the rapid growth of the BRICs. The industry has successfully responded to these challenges and maintained its international competitiveness by developing advanced technologies for pulverized coal injection, expanded use of low cost iron resources, recycling for environmental preservation, and CO2 mitigation.In this paper, the prospects for ironmaking technologies in the coming decades are described by reviewing published papers and looking back on the history of developments in ironmaking during the last 100 years.

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Recent Progress and Future Prospects in Blast Furnace Fuel Injection

Cited by 2 publications

References 0 publications

Review of hydrogen-rich ironmaking technology in blast furnace

Review of hydrogen-rich ironmaking technology in blast furnace

Ironmaking Technology for the Last 100 Years: Deployment to Advanced Technologies from Introduction of Technological Know-how, and Evolution to Next-generation Process

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