Method for preparing TiCl4 from titanium-containing blast furnace slag

The invention discloses a method for preparing TiCl4 by using titanium-containing blast furnace slag, which comprises the following steps: respectively grinding titanium-containing blast furnace slag, a carbonaceous reducing agent and an iron-containing material as raw materials into powder, uniformly mixing according to a certain proportion, heating the mixed material in a heating furnace for a certain time, and cooling to room temperature, thereby obtaining the TiCl4. And separating the obtained reactant in an alkali dissolution-magnetic separation manner, and chlorinating the separated magnetic product to obtain titanium tetrachloride and ferrosilicon alloy. According to the method, not only is the environmental problem caused by massive stockpiling of the titanium-containing blast furnace slag solved, but also a high-added-value product is extracted from the titanium-containing blast furnace slag which is difficult to utilize, so that the economic benefit is greatly improved; in addition, compared with an