Thermodynamic analysis of the effect of molten steel compositions on tin removal

Zhang, Xiang; Ma, Guojun; Liu, Mengke; Li, Zhi; Song, Mingming

doi:10.1016/j.rinp.2019.102862

Cited by 6 publications

(1 citation statement)

References 11 publications

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“…During the recycling of steel scrap, some tramp elements, such as copper (Cu), tin (Sn), antimony (Sb) and arsenic (As), will be introduced into the steelmaking process [1,2]. However, as the above elements have a lesser affinity for oxygen than iron does, they are difficult to remove during conventional steelmaking processes, resulting in an accumulation of them in steel scrap [3]. Sb, as a typical tramp element in steel, has effect on the properties of steel grades.…”

Section: Introductionmentioning

confidence: 99%

Evaporation of the tramp element antimony from molten steel under reduced pressure treatment

Chen

Zhang

et al. 2023

Ironmaking & Steelmaking

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The evaporation of antimony (Sb) in molten steel under reduced pressure is investigated with the gas phase pressure of 19-670 Pa, smelting temperature of 1823-1973 K and initial Sb content of 0.033-0.1 wt%. The findings indicate that Sb removal efficiency increases when smelting temperature rises or gas phase pressure decreases. However, the initial Sb content has little effect on the Sb removal. The Sb removal ratio can reach 94.1% within 40 min of treatment. The range of the apparent evaporation rate constant, k Sb , is 0.61 × 10 −5 to 29.13 × 10 −5 m s −1 . The evaporation of Sb is limited by the gas phase mass transfer at 1903 K and 19-670 Pa. Additionally, the apparent activation energy of Sb evaporation, E Sb , is 128 kJ mol −1 at 226 Pa and 1823-1973 K, and the rate of the interfacial reaction severely restricts the evaporation of Sb.

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Section: Introductionmentioning

confidence: 99%