Abstract
ABSTRACT 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.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.