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- W3082593023 abstract "Cu and Sn are known as typical tramp elements which cause degradation of steel properties during hot processing such as hot shortness and crack occurrence. Cu and Sn are impurities which always remained in steel as long as steel scrap is used as Fe sources. Many researchers have tried to remove Cu and Sn from steel during the production of the steel, but there are still no successful technologies developed/commercialized yet.In the present author’s group, series of researches have been conducted in order to understand evaporation of Cu and Sn when they present as dissolved elements in liquid iron. It was found that Cu and Sn could be removed as pure gas components in forms of Cu(g) and Sn(g), and associated compound with S in forms of CuS(g) and SnS(g), Unfortunately the previous research only conducted evaporation at 1600°C and C-saturated condition so it is necessary to extend the research at different temperature and different C concentration.In the present investigation, kinetic study of Cu and Sn evaporation was elaborated as chemical reaction at the surface is the rate controlling step assisted by thermodynamic modeling. The experiment was conducted at different temperature (1240°C-1500°C) and at different C concentration by employing semi-levitation technique. Ar-4%H2 was flown over alloys of Fe-Cu-C-S and Fe-Sn-C-S through silica chamber with flow rate 1 Lmin-1. Cu and Sn composition were analyzed using Induce Couple Plasma whereas C and S composition were analyzed using LECO combustion method.The experimental results showed that decrease of temperature decreased the rate of evaporation and increase of C concentration increased the evaporation rate caused by change of activity. By modifying a kinetic model developed previously in the present authors’ group, and introducing effect of temperature to thermodynamic and physical properties of the liquid system, it is shown that the newly developed model could explain the newly obtained experimental data obtained in the present study and the previous study by Jung and Kang in the author’s research group. Apparent activation energy of Cu and Sn evaporation were also obtained. The newly developed model is used to simulate the removal of tramp elements in scrap melting process." @default.
- W3082593023 created "2020-09-08" @default.
- W3082593023 creator A5011643409 @default.
- W3082593023 date "2017-01-01" @default.
- W3082593023 modified "2023-09-28" @default.
- W3082593023 title "Evaporation of Tramp Elements from Liquid Iron Containing C and S – Kinetic Investigation Assisted by Thermodynamic Modeling" @default.
- W3082593023 hasPublicationYear "2017" @default.
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