Thermodynamical Study on Stainless Steel Slag Syetems Containing CaO-FeO-SiO2-Cr2O3-MoO3

MA Deng,GUO Pei-min,PANG Jian-ming,ZHAO Pei

Journal of Iron and Steel Research ›› 2014, Vol. 26 ›› Issue (4) : 13-17.

Journal of Iron and Steel Research ›› 2014, Vol. 26 ›› Issue (4) : 13-17.

Thermodynamical Study on Stainless Steel Slag Syetems Containing CaO-FeO-SiO2-Cr2O3-MoO3

  • MA Deng,GUO Pei-min,PANG Jian-ming,ZHAO Pei
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Abstract

An activity-calculating model, intended to calculate the activity of the component of the CaO-FeO-SiO2-Cr2O3-MoO3 stainless steel slag system, was constructed. In company with related thermodynamic data,the model was used to analysis the reducing reaction of molybdenum trioxide. It is known from the result that molybdenum oxide can be easily reduced and the distribution ratio of molybdenum element between the slag and melt is less than 1×10-3, implying that molyoxide is completely competent for the stainless making process, but the chromium may be partly oxidized during this process. The partial pressure of CO, therefore, should be kept at less than 003 to decrease the oxidation of chromium.

Key words

activity-calculating,molybdenum oxide,stainless

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MA Deng,GUO Pei-min,PANG Jian-ming,ZHAO Pei. Thermodynamical Study on Stainless Steel Slag Syetems Containing CaO-FeO-SiO2-Cr2O3-MoO3[J]. Journal of Iron and Steel Research, 2014, 26(4): 13-17

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