Study on the foaming of CaO-SiO2-FeO slags

Part II. Dimensional analysis and foaming in iron and steelmaking processes

Kimihisa Ito, R. J. Fruehan

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

An empirical equation for the foaming index Σ of a CaO-SiO2-FeO slag was obtained by dimensional analysis. The effect of second-phase particles on slag foaming was well described by calculating the viscosity of the mixture using the modified Einstein equation. The anticipated foaming in basic oxygen furnace (BOF), electric arc furnace (EAF), and bath-smelting processes was estimated using the parameter Σ for various operating conditions and slag compositions. For BOF operations, it is predicted that foaming is most extreme in the middle of the blow, and a stable foam in EAF is achieved with less basic slags with low FeO contents. For bath smelting, foam heights of 5 m are possible, and a higher degree of prereduction prior to smelting will reduce foaming (because of smaller gas evolution) and possibly increase production rates. Running the process at a higher pressure will also reduce foam heights, because the volume of gas generated is less.

Original languageEnglish
Pages (from-to)515-521
Number of pages7
JournalMetallurgical Transactions B
Volume20
Issue number4
DOIs
Publication statusPublished - 1989 Aug
Externally publishedYes

Fingerprint

foaming
slags
dimensional analysis
Steelmaking
Slags
Smelting
smelting
Iron
furnaces
Basic oxygen converters
Foams
iron
foams
Electric arcs
electric arcs
Furnaces
Gases
baths
gas evolution
oxygen

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys
  • Materials Chemistry
  • Mechanics of Materials
  • Engineering(all)

Cite this

Study on the foaming of CaO-SiO2-FeO slags : Part II. Dimensional analysis and foaming in iron and steelmaking processes. / Ito, Kimihisa; Fruehan, R. J.

In: Metallurgical Transactions B, Vol. 20, No. 4, 08.1989, p. 515-521.

Research output: Contribution to journalArticle

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