A New Process for the Production of Ferrotitanium from Titania Slag

Abstract

In this research, ferrotitanium was produced from titania slag by an aluminothermic process in an Electro Slag Crucible Melting (ESCM) furnace. The effect of Al and flux additions on titanium recovery, ferrotitanium yield and Ti/Al ratio were studied. It was found that an increase in Al amount led to a decrease in Ti recovery and Ti/Al ratio, in addition to an increase in ferrotitanium yield. Furthermore, increasing the flux amount led to an increase in ferrotitanium yield and Ti/Al ratio. X-ray diffraction (XRD) patterns of the ferrotitanium slag showed that the titanium recovery declined due to the formation of titanium suboxides and tialite in slag. Analysis of ferrotitanium samples, prepared in various conditions, were 45-54.5% Ti, 6-11% Al, 9-11% Si, 0.7-0.9% C, 1.6-2 % Mn, 0.07-0.08 % P and 0.004-0.009% S.

In this research, ferrotitanium was produced from titania slag by an aluminothermic process in an Electro Slag Crucible Melting (ESCM) furnace. The effect of Al and flux additions on titanium recovery, ferrotitanium yield and Ti/Al ratio were studied. It was found that an increase in Al amount led to a decrease in Ti recovery and Ti/Al ratio, in addition to an increase in ferrotitanium yield. Furthermore, increasing the flux amount led to an increase in ferrotitanium yield and Ti/Al ratio. X-ray diffraction (XRD) patterns of the ferrotitanium slag showed that the titanium recovery declined due to the formation of titanium suboxides and tialite in slag. Analysis of ferrotitanium samples, prepared in various conditions, were 45-54.5% Ti, 6-11% Al, 9-11% Si, 0.7-0.9% C, 1.6-2 % Mn, 0.07-0.08 % P and 0.004-0.009% S.

Dans cette recherche, on a produit du ferrotitane à partir de laitier de dioxyde de titane par aluminothermie dans un four type creuset à fusion d'électrolaitier (ESCM). On a étudié l'effet d'additions d'Al et de fondant sur la récupération du titane, sur le rendement de ferrotitane et sur le rapport Ti/Al. On a trouvé qu'une augmentation de la quantité d'Al conduisait à une diminution de la récupération de Ti et du rapport Ti/Al, en plus d'une augmentation du rendement de ferrotitane. De plus, l'augmentation de la quantité de fondant conduisait à une augmentation du rendement de ferrotitane et du rapport Ti/Al. Les patrons de diffraction des rayons x (XRD) du laitier de ferrotitane montraient que la récupération de titane diminuait à cause de la formation de sous-oxydes de titane et de tialite dans le laitier. L'analyse des échantillons de ferrotitane, préparés sous différentes conditions, était de 45-54.5% Ti, 6-11% Al, 9-11% Si, 0.7-0.9% C, 1.6-2% Mn, 0.07-0.08% P et 0.004-0.009% S.