Metallurgical and Materials Transactions B

, Volume 38, Issue 3, pp 357–366

Phosphorus Partition between Liquid Steel and CaO-SiO2-P2O5-MgO Slag Containing Low FeO

Authors

    • Research & DevelopmentTata Steel
  • Ashok Kumar Lahiri
    • Indian Institute of Science
  • Seshadri Seetharaman
    • Royal Institute of Technology
Article

DOI: 10.1007/s11663-007-9057-y

Cite this article as:
Basu, S., Lahiri, A. & Seetharaman, S. Metall and Materi Trans B (2007) 38: 357. doi:10.1007/s11663-007-9057-y

Abstract

CaO-SiO2-FeOx-P2O5-MgO bearing slags are typical in the basic oxygen steelmaking (BOS) process. The partition ratio of phosphorus between slag and steel is an index of the phosphorus holding capacity of the slag, which determines the phosphorus content achievable in the finished steel. The influences of FeO concentration and basicity on the equilibrium phosphorus partition ratios were experimentally determined at temperatures of 1873 and 1923 K, for conditions of MgO saturation. The partition ratio initially increased with basicity but attained a constant value beyond basicity of 2.5. An increase in FeO concentration up to approximately 13 to 14 mass pct was beneficial for phosphorus partition.

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© THE MINERALS, METALS & MATERIALS SOCIETY and ASM INTERNATIONAL 2007