Combustion and heat transfer mechanism in iron bath smelting reduction furnace

Shinotake, Akihiko; Takamoto, Yasushi

doi:10.1051/metal/199390070965

Cited by 9 publications

(5 citation statements)

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“…[1][2][3][4][5][6] The model is not based on a CFD technique, but instead, upon the detailed calculation of heat and mass balances in the system. Shinotake and Takamoto [10] developed a two-dimensional mathematical model for a bath-smelting reactor using the PHOENICS* commercial code. However, it did not consider the spatial variation of variables, such as temperature and mass fraction, in the system.…”

Section: Yun LI and Richard J Fruehanmentioning

confidence: 99%

“…mol/(m 2 · s) [10] where P s CO 2 is the partial pressure of CO 2 at the interface, P e CO 2 is the equilibrium pressure of CO 2 and is essentially zero, and k is the reaction rate constant. Taking a typical steel bath containing 0.05 wt pct O and 0.02 wt pct S, the rate constant for Reaction [9] at the metal interface, according to Belton, [17] is given by…”

Section: De-pc Modelmentioning

confidence: 99%

“…In a CFD model, this can be represented as a flux of CO 2 crossing these surfaces. [10] and [14]: In the case of a de-PC reaction, both the mass fraction (Y s ) and the flux are unknown.…”

Section: De-pc Modelmentioning

confidence: 99%

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Computational fluid-dynamics simulation of postcombustion in the electric-arc furnace

Li¹,

Fruehan

2003

Metall Mater Trans B

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Section: Yun LI and Richard J Fruehanmentioning

confidence: 99%

Section: De-pc Modelmentioning

confidence: 99%

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Computational fluid-dynamics simulation of postcombustion in the electric-arc furnace

Li¹,

Fruehan

2003

Metall Mater Trans B

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“…These include techniques for increasing the oxygen gas supply to the converter and for enhancing post-combustion. [5][6][7][8][9][10][11] However, increasing of the amount of oxygen gas supplied to the converter increases the amount of dust generated from the hot metal, which reduces the yield of chromium and iron. 5) As techniques for enhancing post-combustion operation, use of a higher lance height and the development of a nozzle shape for obtaining a soft blow jet have been proposed.…”

Section: Introductionmentioning

confidence: 99%

“…5) As techniques for enhancing post-combustion operation, use of a higher lance height and the development of a nozzle shape for obtaining a soft blow jet have been proposed. [6][7][8][9][10][11] Although enhanced post-combustion increases heat generation in the converter, the efficiency of post-combustion heat transfer to the molten metal and slag is low.…”

Section: Introductionmentioning

confidence: 99%

Development of Heated Ore Addition Technology Using Burner in Chromium Ore Smelting Reduction Converter

Okuyama¹,

Ogasawara²,

Uchida³

et al. 2015

ISIJ Int.

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In order to increase the heat efficiency of the chromium ore smelting reduction furnace, a heated ore addition technology using a burner in the converter was developed. 5 ton scale pilot converter tests were conducted. Based on the results of the pilot converter tests, this technology has been applied to the actual process. The results are summarized as follows:1) Compared with the conventional process (without burner), the amount of effective heat transfer increased by 18% with addition of heated ore using the burner in 5 ton converter.2) A decrease in the off-gas temperature and reduction of the thermal load on the refractory were also confirmed in 5 ton converter.3) The heat transfer ratio of burner combustion with addition of heated ore increased up to about 90%, depending on the increase of the ore feeding rate in 5 ton converter. 4) From the results of a numerical simulation, it was revealed that the total sensible heat of all particles increases as the ore feeding rate increases. As a result, the ore particles heated by the flame function as a medium of heat transfer from the flame to the molten metal and slag.5) This technology was applied to an actual smelting reduction furnace at JFE Steel East Japan Works (Chiba). As in the tests with 5 ton converter, the heat transfer ratio of burner combustion with addition of heated ore was about 90%. The supplied energy per unit of chromium ore added to the furnace decreased by 17%.

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Slag Foaming

Conejo

2024

Electric Arc Furnace: Methods to Decrease Energy Consumption

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Combustion and heat transfer mechanism in iron bath smelting reduction furnace

Cited by 9 publications

References 0 publications

Computational fluid-dynamics simulation of postcombustion in the electric-arc furnace

Computational fluid-dynamics simulation of postcombustion in the electric-arc furnace

Development of Heated Ore Addition Technology Using Burner in Chromium Ore Smelting Reduction Converter

Slag Foaming

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