Investigation of Sinter Degradation in Blast Furnace Using the In Situ Reaction Vertical Probe

Takada, Tsukasa; Soma, Hideaki; Irita, Toshiyuki; Kamisaka, Eiji; Kimura, Haruo; Isoyama, Masasi; Suzawa, Akikazu

doi:10.2355/tetsutohagane1955.72.2_203

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…119) As the target for sinter quality at that time, the ideal sinter was considered to have highly reducible minerals in low temperature sintering and high porosity, enabling good gas diffusion. During the 1960s, deterioration of permeability and unstable blast furnace operation due to the formation of a low temperature thermal reserve zone 120) in the range of 500-700°C in the blast furnace shaft became issues. 77) Degradation of sinter during reduction was reported at Yawata Works and Sumitomo Metal Industries, 121,122) and it was found that this degradation increases drastically in the temperature range of 500-600°C.…”

Section: Improvement Of Sinter Qualitymentioning

confidence: 99%

“…New sensors were developed for direct measurement inside the blast furnace; this included a rigid vertical probe equipped with a fiber scope 120) at Nippon Steel Muroran Works, a furnace belly probe at Nippon Steel Oita No. 2 blast furnace, 159,[171][172][173] and a tuyere probe 174) and sideways tuyere probe 160) at Kawasaki Steel Chiba No.…”

Section: Artificial Intelligence (Ai) and Other Operationmentioning

confidence: 99%

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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

104

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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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Section: Improvement Of Sinter Qualitymentioning

confidence: 99%

Section: Artificial Intelligence (Ai) and Other Operationmentioning

confidence: 99%

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

104

View full text Add to dashboard Cite

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Effect of Firing Temperature and Reducing Gas Composition during Low-Temperature Reduction of Nanocrystalline Fe2O3

Bahgat

Khedr

Nasr

et al. 2007

Metall Mater Trans B

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Pure nanocrystalline hematite (40 to 100 nm) compacts were prepared and sintered at various temperatures (300°C to 600°C) and then reduced with 100 pct H 2 at 500°C. On the other hand, fired compacts at 500°C were reduced with a H 2 -Ar gas mixture containing different concentration of hydrogen (100, 75, 50, and 25 pct) at 500°C using thermogravimetric techniques. Nanocrystalline Fe 2 O 3 compacts were characterized before and after reduction with X-ray diffraction, scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), and reflected light microscope. It was found that the fired compacts at 400°C to 600°C have relatively faster reaction behaviors compared to that at lower firing temperature 300°C. By decreasing the firing temperature to 300°C, partial sintering with grain growth was observed clearly during reduction. Also, it was found that the reduction rate increased with increasing hydrogen content in the reducing gas. Comparatively, grain growth and partial coalescence took place during reduction with 25 pct H 2 due to long reaction time.

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Influence of sintering conditions on the reduction behaviour of pure hematite compacts

Higuchi

Heerema

2003

Minerals Engineering

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Investigation of Sinter Degradation in Blast Furnace Using the In Situ Reaction Vertical Probe

Cited by 5 publications

References 1 publication

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

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

Effect of Firing Temperature and Reducing Gas Composition during Low-Temperature Reduction of Nanocrystalline Fe2O3

Influence of sintering conditions on the reduction behaviour of pure hematite compacts

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