Precipitation and Growth of V-concentrating Phase in Synthetic V-bearing Steelmaking Slag

Viscosity Property and Structure Analysis of FeO–SiO₂–V₂O₃–TiO₂–Cr₂O₃ Slags

“…The different Raman bands are related to the different structure units, as summarized in 4 4− tetrahedra). 16,22) The bands at about 600-750 cm − 1 are attributed to the structural units of titanium in the melts, but 830-850 cm − 1 are attributed to Ti 4 + which is substituted for Si 4 + in tetrahedron to form Ti-O-Si structure units.…”

“…[1][2][3] Since the blowing smelting time is merely 3 to 5 minutes, the thermodynamics and the dynamics conditions for oxidizing vanadium in hot metal are very important during the blowing smelting process. 4,5) Thus, the properties of the slag, such as melting temperature and viscosity, are very crucial to improve the process conditions.…”

Influence of P2O5 on Crystallization of V-concentrating Phase in V-bearing Steelmaking Slag

“…8,9) 10 g crushed slag glass in alumina crucibles were heated to a full melting state at 1 530°C in air and held for 30 min, then the system was cooled to the run temperatures of 1 300°C at a cooling rate of 3°C/min.…”

“…With the results of EPMA, the compositions of phase in V-bearing steelmaking slag are more clearer than the results by EDX in our pervius stusies. 8,9) Hubert and Kurt 11) …”

“…4,5) Another process of selective enrichment which handles lower content of element or compound in slag has been proposed and used in Ti-bearing blast-furnace slag for Ti and in B-bearing slag for B. 6,7) Our previous studies have found that when V-bearing steelmaking slag with 2.4 wt% P 2 O 5 was doped with 20 wt% Al 2 O 3 , most of V 2 O 5 in the slag was concentrated in whitlockite, 8,9) and V-concentrating phase grew with holding time at crystallization temperature of 1 648 K. But the study of influence of chemical composition, for example, P 2 O 5 , on crystallization of V-concentrating phase has not found anywhere.…”