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 language | English |
|---|---|
| Pages (from-to) | 2145-2148 |
| Number of pages | 4 |
| Journal | ISIJ International |
| Volume | 52 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 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