Contribution
Vanadium-bearing phases in crystallized ferroalloy slags
Ivanov, Ivan T.
European Journal of Mineralogy Volume 7 Number 1 (1995), p. 183 - 186
10 références bibliographiques
publié: Jan 31, 1995
manuscrit accepté: Sep 16, 1994
manuscrit reçu: Apr 18, 1994
DOI: 10.1127/ejm/7/1/0183
Abstract
Abstract Phase compositions and microstructures of waste solid slags obtained during the production of ferrovanadium and ferromolybdenumvanadium alloys have been studied. The slag phase composition and the vanadium distribution have been investigated using optical microscopy, X-ray diffraction, scanning electron microscopy (SEM) and electron microprobe techniques (EPMA). A series of simple and complex oxides, calcium aluminates and silicates were identified, including a new phase SVCA (complex calcium vanadium oxide-silicate) with the composition Ca4Al15.14V5.15Mg1.0Fe0.026Ti0.3Mn0.024Si2.36O40, space group PT and lattice parameters a = 10.273, b = 10.634, c = 8.808 Å, α = 106.24, ß = 95.71, γ= 124.47°, z = 4. In a previous investigation the crystal structure of SVCA, which is of aenigmatite type, was determined and refined to R = 0.046
Mots-clefs
ferroalloy slag • vanadium phase • SVCA phase • aenigmatite group