Method for preparing ferrotitanium by using waste vanadium-tungsten-titanium catalyst

The invention discloses a method for preparing ferrotitanium by using a waste vanadium-tungsten-titanium catalyst, and belongs to the technical field of waste catalyst recovery. The method comprises the following steps: separating and grinding a catalyst main body and blockages, adding a fluxing agent, mixing and heating to prepare alloy slag; and then, a composite reducing agent is added into the alloy slag for thermal reduction, after the reaction is finished, the molten steel is cooled, and after the residual slag on the upper surface of the molten steel is removed, the ferrotitanium containing the vanadium and tungsten elements is obtained. According to the method for preparing the ferrotitanium alloy, carbon thermal reduction and aluminothermic reduction are combined, valuable elements of the waste denitration catalyst are fully utilized, and the ferrotitanium alloy containing vanadium and tungsten elements is produced; meanwhile, the sequence of carbon thermal reduction and aluminothermic reduction is c