Vaporization Studies from Slag Surfaces Using a Thin Film Technique

• Published in: Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2013-08, Vol.44 (4), p.783-788
• Main Authors: Seetharaman, Seshadri, Shyrokykh, Tetiana, Schröder, Christina, Scheller, Piotr R.
• Format: Article
• Language: English
• Subjects: Applied sciences; Characterization and Evaluation of Materials; Chemistry and Materials Science; Communication; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Function of time; Gases; Hot thermocouple; Materials Science; Metallic Materials; Metals. Metallurgy; Methods of deposition of films and coatings; film growth and epitaxy; Nanotechnology; Oxidation; Oxidizing atmosphere; Physics; Possible mechanisms; Process metallurgy; Production of metals; Slag; Slags; Structural Materials; Surface evaporation; Surface oxidations; Surface tension; Surfaces and Interfaces; Thin Films; Thin-film technique; Transaction processing; Vanadium; Vanadium content; Vanadium pentoxide; Vaporization
• ISSN: 1073-5615; 1543-1916; 1543-1916
• DOI: 10.1007/s11663-013-9865-1

The investigations of vanadium vaporization from CaO-SiO 2 -FeO-V 2 O 5 thin film slags were conducted using the single hot thermocouple technique (SHTT) with air as the oxidizing atmosphere. The slag samples were analyzed after the experiments by SEM/EDX. The vanadium content was found to decrease as a function of time. The loss of vanadium from the slag film after 30 minutes of oxidation was approximately 18 pct and after 50 minutes, it was nearly 56 pct. The possible mechanism of vanadium loss would be the surface oxidation of vanadium oxide in the slag, VO x to V 5+ , followed by surface evaporation of V 2 O 5 , which has a high vapor pressure at the experimental temperature.