Abstract: The reaction mechanism and track of vanadium were analyzed by theoretical calculation and sample detection during titanium extraction from blast furnace slag in Pangang by processes of high temperature carburization and low temperature chlorination. The results show that vanadium enters into the carbonization slag in the form of V₂O₃ during high temperature carburization of the blast furnace slag,then V₂O₃ reacts with chlorine in the process of low temperature chlorination and the product VOCl₃ enters into coarse TiCl₄. VOCl₃ transforms into solid VOCl₂ and stays in the residue through refining process. V₂O₅ satisfying the GB3283-1987 standard can be prepared by undergoing processes of calcination of the residue,salt roasting,leaching,and etc. Preliminary measurement indicates that about 50 tons of V₂O₅ can be recycled in producing every 10 000 tons of coarse TiCl₄.