Back to Search
Start Over
Elemental Distribution Modification Toward Target Calcium Roasting of Vanadium-Bearing Slags.
- Source :
- JOM: The Journal of The Minerals, Metals & Materials Society (TMS); Jul2024, Vol. 76 Issue 7, p3896-3904, 9p
- Publication Year :
- 2024
-
Abstract
- The elemental distributions among various phases in vanadium-bearing slags have been quantified toward high-efficiency separation and extraction by calcium roasting using electron probe X-ray microanalysis. The roles of the roasting conditions were clarified, including roasting temperature, roasting time, and calcium amount. It was found that, with increasing roasting temperature, the V<subscript>2</subscript>O<subscript>5</subscript> concentration in the target vanadium-enriched phase, predominantly in a form of 2(Ca,Mn)O·V<subscript>2</subscript>O<subscript>5</subscript>, decreased along with more SiO<subscript>2</subscript> and Fe<subscript>2</subscript>O<subscript>3</subscript> in this phase; while, with increasing roasting time, the V<subscript>2</subscript>O<subscript>5</subscript> concentration in the vanadium-enriched phase increased due to a more complete reaction. However, a higher calcium addition induced a lower V<subscript>2</subscript>O<subscript>5</subscript> concentration in the vanadium-enriched phase and, therefore, a CaO/V<subscript>2</subscript>O<subscript>5</subscript> weight ratio of 0.6 was employed. In addition to the vanadium-enriched phase, the solubilities, especially V<subscript>2</subscript>O<subscript>5</subscript> in the SiO<subscript>2</subscript> and Fe<subscript>2</subscript>O<subscript>3</subscript> solid solutions under varying roasting conditions, were also identified for a reduction of vanadium loss. Based on those quantitative results, the main principles to target to adjust the elemental distributions among various phases during the calcium roasting of vanadium-bearing slags are discussed toward a low-cost and high-efficiency vanadium extraction. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10474838
- Volume :
- 76
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- JOM: The Journal of The Minerals, Metals & Materials Society (TMS)
- Publication Type :
- Academic Journal
- Accession number :
- 177950732
- Full Text :
- https://doi.org/10.1007/s11837-024-06603-5