Metal emulsion by rising bubbling in molten tin-oxides system

Jiang Liu, Nobuhiro Maruoka, Shigeru Ueda, Shinya Kitamura

Research output: Contribution to conferencePaperpeer-review

Abstract

The chemical reactions involved in steelmaking process are controlled by mass transfer between metal and slag phases. Metal emulsion occurring in gas stirred steel ladles has significant potential to improve the reaction efficiency because of the increased interface area between the two phases. To understand the emulsion behavior in steel/slag systems, the experiment using metal/oxide system was established. Na2B4O7was used as the upper phase as it has a low melting temperature, is soluble in aqueous solvents, and dose not react with the metal phase, while Sn was used as low phase. The experiments were performed to investigate the formation of emulsified metal phase by injected gas bubbles. The emulsified metal droplets were extracted from the sampled oxide using aqueous solvent, and the size distribution of droplets was measured. The results showed that the number and total volume of emulsified metal droplets increased along with bubbling time. In contrast to the previously studied Sn /chloride system, the volume of droplets was in oxide system rather greater; however, the total number was much smaller. These results elucidate the influence of viscosity of the oxide phase on the emulsion process.

Original languageEnglish
Pages862-865
Number of pages4
Publication statusPublished - 2015 Jan 1
Event6th International Congress on the Science and Technology of Steelmaking, ICS 2015 - Beijing, China
Duration: 2015 May 122015 May 14

Other

Other6th International Congress on the Science and Technology of Steelmaking, ICS 2015
CountryChina
CityBeijing
Period15/5/1215/5/14

Keywords

  • Bottom gas bubbling
  • Droplets
  • Interfacial area
  • Metal emulsion
  • Viscosity

ASJC Scopus subject areas

  • Metals and Alloys

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