Effect of initial [Si] content on the lime efficiency on the dephosphorization

Naoto Sasaki, Kenichiro Naito, Yoji Demoto, Shinya Kitamura

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Hot metal dephosphorization slag is in the state in which solid and liquid coexist. However, in the previous reaction analysis, the contribution of solid phase is not taken into consideration in many cases because of the lack of thermodynamic and kinetic theory understanding. In this research, dephosphorization examination was conducted. In this examination the solid phase existing during the reaction was changed by changing initial concentration of Si in the hot metal. And relationship between type of solid phase in slag and dephosphorization efficiency was investigated. The results are summarized as follows: The range of Δ[Si] exists where dephosphorization efficiency is improved. The dephosphorization reaction in a solid and liquid coexistence slag is greatly influenced by the solid phase that precipitates in the slag. Dephosphorization efficiency improves in the 2CaO·SiO2 crystallizing range. This improvement can be explained by concentration of phosphorus in the solid phase.

Original languageEnglish
Pages (from-to)300-305
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Issue number6
Publication statusPublished - 2002 Jun


  • Dephosphorization
  • Hot metal treatment
  • Phase analysis
  • Phase diagram
  • Slag
  • Solid phase

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry


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