Development of Slag Minimum Refining Process by Desiliconization of Hot Metal

Itoh, Yukiyoshi; Satoh, S.; Kawauchi, Yuji

doi:10.2355/tetsutohagane1955.67.16_2675

Cited by 10 publications

(3 citation statements)

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“…The figure also shows the η reported in the previous literature. 5,15,16) η in the present trial is larger than that with impeller stirring at the blast furnace runner and is equivalent to the value with impeller stirring in the transfer ladle.…”

Section: Resultsmentioning

confidence: 53%

Effective Desiliconization Method with Swirling Flow of Hot Metal at Blast Furnace Casthouse

Uchida¹,

Kishimoto²,

Miki³

et al. 2016

ISIJ Int.

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Section: Resultsmentioning

confidence: 53%

Effective Desiliconization Method with Swirling Flow of Hot Metal at Blast Furnace Casthouse

Uchida¹,

Kishimoto²,

Miki³

et al. 2016

ISIJ Int.

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“…To achieve desired end blow phosphorous content in steel for low silicon hot metal an optimum slag volume is required and that can be achieved by addition of ferrosilicon, silica, etc. Itoh et al [11] tried to develop a relationship between hot metal silicon and dephosphorization ratio by conducting plant trial in 50 and 120 T converter. Authors found that dephosphorization ratio can be achieved higher with hot metal containing Si content less than 0.20%.…”

Section: Introductionmentioning

confidence: 99%

Production of low phosphorous steel from low silicon high phosphorous hot metal in BOF

Gupta

Kumar

Babu

et al. 2023

Ironmaking & Steelmaking

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Production of low phosphorous (≤0.015%) steel in Basic Oxygen Furnace (BOF) using high phosphorous (average 0.17%) and low silicon (≤0.5%) hot metal with Si/P ratio <3 is a challenging task. In addition to temperature, slag basicity and FeO, the quantity of slag becomes important which is achieved by higher lime addition. However, how much lime is appropriate need to be understood. A detailed analysis of plant data indicated that a scope exists for lowering lime addition from existing level. Accordingly, systematic trials were conducted with reduction in lime which showed that lowering 12% lime had no effect while 19% reduction increased end blow (EB) P by 20 ppm. SEM-EDX studies of slag samples revealed chemical and morphological changes in trial heats. Lime addition pattern was also found to impact EB P. Addition of lime in a small batch during 10-25% of the oxygen blow resulted lower EB P.

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“…1,2) In addition, the high level of silicon of the hot metal may increase the running cost due to increased slag volume and lime consumption, as well as the accelerated chemical attack of the refractory lining in the converter. [3][4][5] Therefore, control of the silicon content in the hot metal is essential to optimize the steelmaking process.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of Dissolution of SiO Gas in Liquid Fe–C Alloys

Kim

Lee

et al. 2018

ISIJ Int.

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The dissolution rate of SiO gas in liquid iron (Fe-2 wt% C and Fe-4 wt% C alloys) was investigated at 1 843, 1 868, and 1 893 K. SiO gas was generated from a silica-graphite particle mixture, and then, it was introduced onto the surface of liquid iron through an alumina lance with CO carrier gas. The effect of gasphase mass transfer on the dissolution rate of SiO gas was minimized by adjusting the CO gas flow rate. The rate of silicon transfer remained almost constant regardless of the initial carbon content in liquid iron, whereas it increased with increasing temperature. From the experimental results, it was concluded that the adsorption of SiO gas onto the surface of liquid iron was the rate-determining step.

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Development of Slag Minimum Refining Process by Desiliconization of Hot Metal

Cited by 10 publications

References 0 publications

Effective Desiliconization Method with Swirling Flow of Hot Metal at Blast Furnace Casthouse

Effective Desiliconization Method with Swirling Flow of Hot Metal at Blast Furnace Casthouse

Production of low phosphorous steel from low silicon high phosphorous hot metal in BOF

Kinetics of Dissolution of SiO Gas in Liquid Fe–C Alloys

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