Development of Burden Distribution Simulation Model for the Bell-less Top in a Large Blast Furnace and Its Application

Hattori, Michinori; Iino, Bungo; Shimomura, Akio; Tsukiji, Hideaki; Ariyama, Tatsuro

doi:10.2355/tetsutohagane1955.78.8_1345

Cited by 10 publications

(10 citation statements)

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“…151,152) All companies developed bell-less burden distribution models in order to take advantage of the high flexibility of bell-less systems in control of burden distribution. 153,154) Using one such model, Kajiwara et al 155) showed that flat charging, which bell-MA charging systems cannot achieve, is possible with bell-less blast furnaces.…”

Section: Bell-less Charging Systemsmentioning

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

109

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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: Bell-less Charging Systemsmentioning

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

109

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“…Hence, many researches about the particle segregation at the charging process have been studied experimentally and mathematically. [1][2][3] However, the experimental approach is laborious, because the scale of ironmaking process is huge and there are too many operational parameters and designs of system, which affect the particle segregation.…”

Section: Introductionmentioning

confidence: 99%

Validation of Particle Size Segregation of Sintered Ore during Flowing through Laboratory-scale Chute by Discrete Element Method

Mio¹,

Komatsuki²,

Akashi³

et al. 2008

ISIJ Int.

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“…In the bosh, they found an abundance of frozen droplets or beads of molten metal, molten gangue, and glazed lime [11,12]. These beads were probably trickling down towards the hearth at the bottom.…”

Section: Details Of the Findingsmentioning

confidence: 99%

mentioning

confidence: 99%

“…All furnaces showed that the cohesion zone was characterized by a number of annular layers of fused ore and they disappeared by dripping away along the core slope [12]. Depending on the operating conditions, the shape of the cohesion zone can be V, W or inverse V. It was concluded that the factors affecting the shape of this region were the distribution of charged materials, the descent behavior of materials in the lumpy zone and cohesion zone, the conditions in the combustion zone and the state of coke inflow at the combustion zone.…”

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confidence: 99%

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A Review on the Dissection of Quenched Blast Furnaces—Spanning from the Early 1950s to the 1970s

Zhang

2016

Processes

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Since its invention until the 1950s, the iron blast furnace was viewed as a strange 'black box'. Its operation was largely empirical and much of the information needed for monitoring and control of the process was yet to be known. More complete information was needed concerning the process such as the reduction of iron-bearing raw materials, the distribution of materials throughout the stack, the size, location, and structure of the fusion zone, and the transfer of silicon, sulfur, and carbon to the slag and metal. Hence, to obtain a better understanding of the blast furnace process, some iron-makers came up with the idea of quenching the contents of the furnace following normal operations. This was done in a neutral nitrogen atmosphere. The quenched contents were then sampled for analysis. Thus, this paper was written to discuss such works, spanning from the early 1950s to the 1970s. Care has been taken to include most of their findings and readers who have a fair amount of iron-making knowledge should be able to see and understand the in-furnace phenomena as the 'black box' unfolds itself. Most of the text will be focused on two important studies into the matter, the first being the U.S. Bureau of Mines case in 1959 and the next being the Iron and Steel Institute of Japan (ISIJ) studies in the 1970s. The contribution of these works to modern day blast furnace operation is also discussed in the paper.

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Development of Burden Distribution Simulation Model for the Bell-less Top in a Large Blast Furnace and Its Application

Cited by 10 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

Validation of Particle Size Segregation of Sintered Ore during Flowing through Laboratory-scale Chute by Discrete Element Method

A Review on the Dissection of Quenched Blast Furnaces—Spanning from the Early 1950s to the 1970s

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