Density measurements of CaO-MnO-SiO2 slags

Joonho Lee, Le Thu Hoai, Joongkil Choe, Joo Hyun Park

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Density measurements of CaO-MnO-SiO2 slags were carried out using the Archimedean method. The density decreased with increasing temperature, and the negative temperature coefficient (-dρ/dT) was in the range of 1.46-3.10 × 10-1 kg/m3 K. At a fixed CaO content (25 wt%) and at a fixed SiO2 content (30 wt%), the density of CaO-MnO-SiO2 slag increased with increasing MnO content. The molar volumes of CaO, MnO and SiO2 at 1 773 K were estimated 21.0, 17.2, and 28.0 × 10-6 m3/mol, respectively. The molar excess volume was expressed by VEx =ωXSiO2(1-X SiO2), where ω = -8.97 × 10-6 m 3/mol at 1 773 K. The thermal expansion coefficient decreased with increasing XSiO2 because of the enhanced silicate network structure.

Original languageEnglish
Pages (from-to)2145-2148
Number of pages4
JournalISIJ International
Volume52
Issue number12
DOIs
Publication statusPublished - 2012

Keywords

  • Archimedean method
  • CaO-MnO-SiO slag
  • Density
  • Molar volume
  • Silicate network structure
  • Thermal expansion coefficient

ASJC Scopus subject areas

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

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