Reduction of chromium oxide from slags

Authors

  • J. Gutiérrez-Paredes Dept. of Metallurgical Eng., IPN-ESIQIE
  • A. Romero-Serrano Dept. of Metallurgical Eng., IPN-ESIQIE
  • M. A. Hernández Dept. of Metallurgical Eng., IPN-ESIQIE
  • F. Chávez-Alcalá Dept. of Metallurgical Eng., IPN-ESIQIE
  • B. Zeifert Dept. of Metallurgical Eng., IPN-ESIQIE

DOI:

https://doi.org/10.3989/revmetalm.2005.v41.iExtra.1073

Keywords:

Chromium, Slags, Stainless steel, Reduction

Abstract


Experimental and theoretical work were performed to estimate the effect of slag basicity and amount of reducing agents on the reduction of chromium oxide from the slag which interacted with molten steel at 1,600 °C. The slag system contained CaO, MgO, SiO2, CaF2 and Cr2O3 together with Fe-alloys (Fe-Si and Fe-Si-Mg). The CaF2 and MgO contents in the slags were 10 mass % each; Cr2O3 was 25%. The amount of the ferroalloys ranged from 12.5 to 50 g per 100 g of slag. The (CaO+MgO)/SiO2 ratio was held at 1 and 2. The Cr yield was determined using both Fe-alloys as reducing agents. Some estimations were made to determine the theoretical effect of temperature, slag basicity, (CaO+MgO)/SiO2, and amount of reducing agents in the slag on the chromium recovery. The FACT (Facility for the Analysis of Chemical Thermodynamics) computational package is used to determine the equilibrium between the slag and molten steel.

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Published

2005-12-17

How to Cite

Gutiérrez-Paredes, J., Romero-Serrano, A., Hernández, M. A., Chávez-Alcalá, F., & Zeifert, B. (2005). Reduction of chromium oxide from slags. Revista De Metalurgia, 41(Extra), 443–446. https://doi.org/10.3989/revmetalm.2005.v41.iExtra.1073

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