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The Phase Diagram of a CaO-Al[sub.2]O[sub.3]-VOIx/I Slag System under Argon Atmosphere at 1500 °C

Metals (Basel ), 2024-01, Vol.14 (1) [Peer Reviewed Journal]

COPYRIGHT 2024 MDPI AG ;ISSN: 2075-4701 ;EISSN: 2075-4701 ;DOI: 10.3390/met14010108

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  • Title:
    The Phase Diagram of a CaO-Al[sub.2]O[sub.3]-VOIx/I Slag System under Argon Atmosphere at 1500 °C
  • Author: Liu, Chengjun ; Xie, Xiaoxiang ; Qiu, Jiyu ; Li, Wenjie ; Huo, Guojie
  • Subjects: Lime ; Vanadium
  • Is Part Of: Metals (Basel ), 2024-01, Vol.14 (1)
  • Description: The thermodynamic properties of the CaO-Al[sub.2]O[sub.3]-VOx slag system are of great significance to the direct alloying of vanadium in the smelting process of vanadium steel. In this paper, the phase equilibrium relationship of the CaO-Al[sub.2]O[sub.3]-VOx system under argon atmosphere at 1500 °C was studied with a high-temperature phase equilibrium experiment. Combined with SEM-EDS, XRD, and XPS, the types and compositions of each phase of the equilibrium slag samples and the content of different valence states of the vanadium element were determined. The result shows that under argon atmosphere (p(O[sub.2]) = 10[sup.−3] atm) at 1500 °C, the CaO-Al[sub.2]O[sub.3]-VOx slag system contains four three-phase regions, seven two-phase regions, and a single-phase region (glass phase). The phase equilibrium results were plotted in a CaO-Al[sub.2]O[sub.3]-V[sub.2]O[sub.5]-VO[sub.2] spatial phase diagram, and the phase equilibrium results were projected on the CaO-Al[sub.2]O[sub.3]-V[sub.2]O[sub.5] and CaO-Al[sub.2]O[sub.3]-VO[sub.2] pseudo-ternary phase diagrams, respectively. In the end, the rationality of projecting the phase equilibrium results to the pseudo-ternary phase diagram was quantitatively evaluated.
  • Publisher: MDPI AG
  • Language: English
  • Identifier: ISSN: 2075-4701
    EISSN: 2075-4701
    DOI: 10.3390/met14010108
  • Source: ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
    DOAJ Directory of Open Access Journals
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