On the Interaction of Calcium and Oxygen in Liquid Iron

Abstract:

The parameters of calcium and oxygen interaction in liquid iron are revised. The Vagner parameter values of several hundreds or dozens are proved to be wrong. The recommended value for the constant for the reaction of dissolved calcium and oxygen forming solid calcia is /CaO/=[Ca]+[O] is: lgK/CaO/=-34100/T + 13.46. Vagner parameter for the interaction of Ca and O in liquid iron should be expressed in units (we used =–1.41), not in hundreds. The equilibrium diagram of calcium and oxygen content in liquid iron is calculated at 1550-1700 °C and 0.00001-0.1 mass % Ca. The minimum oxygen content possible to be achieved at 1550 °C and 1 atm is about 0.001 mass %.

• Periodical: Materials Science Forum (Volume 843)
• Pages: 52-61
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.843.52
• Online since: February 2016
• Authors: G.G. Mikhailov*, D.A. Zherebtsov
• Keywords: Calcium, Deoxidation, Melt, Oxygen, Steel, Thermodynamics, Vagner Parameter

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