Determination of Vanadium Solubility in the Al2O3-CaO(30 Mass Pct)-SiO2 and Al2O3-CaO(35 Mass Pct)-SiO2 System
2015 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 46, no 2, 733-740 p.Article in journal (Refereed) Published
The solubility of vanadium oxide in the Al2O3-CaO(30 mass pct)-SiO2 system and Al2O3-CaO(35 mass pct)-SiO2 system was determined experimentally at 1873 K (1600 degrees C) and at a fixed oxygen potential of 9.37 x 10(-11) bar. EPMA microanalyses were employed to identify the phases and their compositions in the quenched samples. The solubility of vanadium oxide in the liquid phase was found to decrease with increasing CaO content in the liquid. The vanadium oxide solubility was especially low when both CaO and Al2O3 contents were high in the liquid phase. The maximum solubility of vanadium oxide was up to 7 mass pct (as V). Two solid phases were found, a solid solution of Al2O3 and vanadium oxide and an Al2O3-rich solid phase with 16.7 mass pct V2O3. The Al2O3 solubility in the solid solution was found to increase with increasing Al2O3 content in the liquid, the impact of the CaO content in the liquid on the solubility of Al2O3 in V2O3 was found to be small. The Al2O3-rich solid phase was identified as the mineral hibonite with fractionation of V into the crystal structure.
Place, publisher, year, edition, pages
2015. Vol. 46, no 2, 733-740 p.
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-165206DOI: 10.1007/s11663-014-0237-2ISI: 000351860300023ScopusID: 2-s2.0-84910069907OAI: oai:DiVA.org:kth-165206DiVA: diva2:810442
QC 201505072015-05-072015-04-242015-05-07Bibliographically approved