Interaction Coefficients of Cu and Sn with Mn in Molten Iron at 1873 K

Kato, Kengo; Ito, Hiroki; Ono, Hideki

doi:10.2355/isijinternational.isijint-2022-112

Cited by 2 publications

(3 citation statements)

References 28 publications

(45 reference statements)

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“…The analytical model was developed similarly to the previous studies 6,7) . The analytical model is described in Figure 1.…”

Section: Analytical Model Description 1 Setting Up the Templatementioning

confidence: 99%

“…When the solid and liquid phases can coexist in the slag, the activity of the slag components was estimated from the average composition of the slag by extrapolating the equation of the activity in the liquid state. The interaction coefficients in molten iron 7,11,12,29,30) are summarized in Table 5. In Table 5, the values are generally given at 1873K.…”

Section: Analytical Model Description 1 Setting Up the Templatementioning

confidence: 99%

“…Accordingly, it is essential to understand the required amount of C. The author performed the thermodynamic analysis of slag/metal reactions in the ironmaking process using sinters and steel scrap as iron sources 6,7) , reported the effects of using scarp on the ironmaking process, and proposed the operating conditions to produce hot metal with low impurity contents. In this study, the equilibrium of slag/metal reactions in the steelmaking process using DRI and steel scraps were thermodynamically analyzed, and the effect of using scrap on the equilibrium composition of molten steel and slag and the conditions to produce low-phosphorous molten steel from high-P content DRI and steel scrap were discussed.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Analysis on Slag/Metal Reactions in Steelmaking Process Using Direct Reduced Iron and Steel Scraps

Kato,

Ono

2024

ISIJ Int.

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Hydrogen reduction processes of iron ores are being developed to achieve carbon neutrality.However, high-grade iron ore pellets used in the current direct reduction process will be depleted in the future. On the other hand, steel scraps recovered from society are usually contaminated with tramp elements, which are difficult to remove in the current steel refining processes. To produce high-quality steel from DRI and steel scraps, molten steel composition in the melting process should be optimized considering the impurities originating in iron resources and conditions such as temperature and oxygen potential. In this study, the equilibrium of slag/metal reactions in the steelmaking process using DRI and steel scraps were thermodynamically analyzed, and the effect of using scrap on the composition of molten steel and slag and the conditions to produce lowphosphorous molten steel from high-P content DRI and steel scrap were discussed. The use of steel scrap showed such advantages as a decrease in the concentrations of Si, S, and P originating from high-P DRI, a decrease in the amount of slag, and a reduction in the amount of limestone required to maintain slag basicity. Moreover, the P content of iron can be decreased to 13 mass ppm at 1873K and 𝑃 = 10 -10 atm even when the high-P DRI is used in combination with steel scrap. The thermodynamic analysis showed the potential for carbon-free steel by optimizing the hydrogen reduction process and the melting process of DRI with steel scraps..

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“…The analytical model was developed similarly to the previous studies 6,7) . The analytical model is described in Figure 1.…”

Section: Analytical Model Description 1 Setting Up the Templatementioning

confidence: 99%