Thermodynamic Activity of Chromium Oxide in CaO‐SiO2‐MgO‐Al2O3‐CrOx Melts |
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| Authors: | Pengli Dong Xidong Wang Seshadri Seetharaman |
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| Affiliation: | 1. Department of Physical Chemistry, University of Science and Technology Beijing, 100083, China;2. Department of Materials Science Engineering, Royal Institute of Technology, Sweden;3. College of Engineering, Peking University, Beijing 100871, China |
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| Abstract: | Thermodynamic activities of chromium oxide contained in CaO‐SiO2‐MgO‐Al2O3 melts were measured in the present work using gas‐slag equilibrium technique. The oxygen partial pressure was varied (10‐3, 10‐4, 10‐5 Pa). Gas mixture of CO, CO2 and Ar were used and investigated at 1803, 1873 and 1923 K. The activities of CrO showed a strong positive deviation from ideality and a decrease with increasing temperature and oxygen partial pressure. A mathematical expression relating the amount of chromium oxide in the slag phase with the activity of Cr in the metal phase based on the present experimental results is presented. |
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| Keywords: | Equilibrium Activity Chromium oxide Steel Melts |
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