Effects of post combustion temperature on the wear of the supersonic nozzles in BOF lance tip

Garajau, Fabrício Silveira; Guerra, Marcelo de Souza Lima; Maia, Breno Totti; Cetlin, Paulo Roberto

doi:10.1016/j.engfailanal.2018.09.024

Cited by 15 publications

(6 citation statements)

References 1 publication

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“…Feng et al [29] studied the effect of erosion at the nozzle outlet on the jet characteristics and determined that an increase in pressure is conducive to an increase in jet velocity; meanwhile, an increase in nozzle outlet erosion leads to the acceleration of jet velocity attenuation and increase in coalescence. Garajau et al [30,31] reached similar conclusions.…”

Section: Introductionmentioning

confidence: 53%

Effects of Nozzle Layout and Parameters on the Jet Characteristics of a CO2 + O2 Mixed Oxygen Lance

Feng

Zhu

Dong

et al. 2021

Metall Mater Trans B

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Section: Introductionmentioning

confidence: 53%

Effects of Nozzle Layout and Parameters on the Jet Characteristics of a CO2 + O2 Mixed Oxygen Lance

Feng

Zhu

Dong

et al. 2021

Metall Mater Trans B

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“…Nevertheless, researchers have carried out some related research works, such as postcombustion, [17][18][19] heat transfer of converter shell, [20,21] scrap melting, [22,23] and heat transfer of oxygen lance nozzle. [24,25] Li et al [17] proposed a mathematical model to describe postcombustion and heat transfer behavior in a converter by coupling the droplet generation, movement, and heat transfer models. Gou et al [18] reported that postcombustion is determined by the rate of decarbonization, and about 20% of combustion heat, which is normally considered to be recovered by the molten bath, is actually lost through the converter walls and lance.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Heat Transfer Behavior in Hot Spot Zone of Converter Molten Bath

Jiang,

Sun,

Mao

et al. 2024

steel research int.

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The multiphase fluid flow and heat transfer behavior in the steelmaking converter are essential for efficient and stable smelting. Herein, a mathematical model of heat transfer for the hot spot zone of the converter is established. The temperature distribution of the molten bath is clarified, and the effects of operating parameters and the exothermic rate of hot spot zone on the heat transfer behavior of the molten bath are investigated. The results show that the temperature gradient between the hot spot zone and the liquid steel as well as the circulation of liquid steel will lead to the nonuniform distribution of temperature. Both the direction of flow field and the mixing characteristics of molten bath influence the heating rate of molten bath, whereas the direction of the flow field plays a dominant role. In addition, the oxygen lance height has a significant influence on the heat transfer behavior; as the lance height increases from 1.35 to 1.65 m, the heating rate increases by 68.32%. The increase of exothermic rate will remarkably increase the temperature gradient and the heating rate increases by 65.84% and 114.28% when the exothermic rate increases by 1.5 and 2 times, respectively.

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“…The aforementioned studies were based on unworn oxygen lance nozzles. However, the end of the oxygen lance nozzle in the converter steelmaking process is easily worn owing to long-term high-temperature radiation, slag, and high-velocity gas flushing [15], and the jet and stirring characteristics also change. There is little research on the influence of nozzle wear on the jet characteristics and stirring effects.…”

Section: Introductionmentioning

confidence: 99%

Effect of the wear of supersonic oxygen lance on the stirring characteristics and metallurgical effects in the converter steelmaking process

Chen

et al. 2022

Ironmaking & Steelmaking

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Studying the variation in jet characteristics of an oxygen lance nozzle is of great significance for the converter smelting process. A full-size geometric model of a 120-t converter was established and the effects of a worn oxygen lance nozzle exit on the gas jet, stirring characteristics, and molten bath velocity distribution were studied. An increasing wear angle increases the nozzle exit velocity, increases the jet velocity attenuation, decreases the area of the longitudinal high-velocity zone of the molten bath, increases the area of the low-velocity and dead zones, worsens the molten steel flow, and decelerates the reaction rate. Then, industrial tests were conducted using a 120-t converter. When the wear angle increased from 0 to 20°, the phosphorus content, carbon-oxygen equilibrium, and TFe content in the slag increased from 0.029%, 0.0023, and 12.92% to 0.032%, 0.0028, and 14.58%, respectively. This study has important implications for optimizing the oxygen supply in converters.

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Effects of post combustion temperature on the wear of the supersonic nozzles in BOF lance tip

Cited by 15 publications

References 1 publication

Effects of Nozzle Layout and Parameters on the Jet Characteristics of a CO2 + O2 Mixed Oxygen Lance

Effects of Nozzle Layout and Parameters on the Jet Characteristics of a CO2 + O2 Mixed Oxygen Lance

Numerical Simulation of Heat Transfer Behavior in Hot Spot Zone of Converter Molten Bath

Effect of the wear of supersonic oxygen lance on the stirring characteristics and metallurgical effects in the converter steelmaking process

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