Trial on the application of capillary phenomenon of solid CaO to desulfurization of liquid Fe

Toshihiro Tanaka, Yumi Ogiso, Mitsuru Ueda, Joonho Lee

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

In order to carry out the de-sulfurization of liquid Fe, solid CaO is usually used as a flux, but some of solid CaO particles are not melted into molten slag, and all CaO are not always used for the refining. We have investigated how to use the solid CaO directly and efficiently for the above refining processes. Solid CaO particles have small capillary tubes from their surface to inside. When a molten slag is wetted with solid CaO, the molten slag containing some impurities such as CaS and P2O5 is expected to penetrate into those capillary tubes. Although chemical reactions in solid phase are generally believed to be very slow due to slow diffusion in solid phase, those impurities are absorbed in solid CaO rapidly by capillary force and they are removed from molten steels. We named this refining process as Capillary Refining. In the present paper, we have tried to apply capillary refining to de-sulfurization of liquid Fe and carbon-saturated liquid Fe by using molten CaO-Al2O3 and CaO-SiO2-MgO-Al 2O3 slags.

Original languageEnglish
Pages (from-to)1071-1077
Number of pages7
JournalISIJ International
Volume50
Issue number8
DOIs
Publication statusPublished - 2010 Nov 12

Fingerprint

Desulfurization
Refining
Molten materials
Liquids
Slags
Capillary tubes
phosphorus pentoxide
Diffusion in solids
Impurities
Steel
Chemical reactions
Carbon
Fluxes

Keywords

  • Capillary
  • Desulfurization
  • Molten slag
  • Refining

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

Cite this

Trial on the application of capillary phenomenon of solid CaO to desulfurization of liquid Fe. / Tanaka, Toshihiro; Ogiso, Yumi; Ueda, Mitsuru; Lee, Joonho.

In: ISIJ International, Vol. 50, No. 8, 12.11.2010, p. 1071-1077.

Research output: Contribution to journalArticle

Tanaka, Toshihiro ; Ogiso, Yumi ; Ueda, Mitsuru ; Lee, Joonho. / Trial on the application of capillary phenomenon of solid CaO to desulfurization of liquid Fe. In: ISIJ International. 2010 ; Vol. 50, No. 8. pp. 1071-1077.
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