Method for preparing titanium carbide slag by using titanium-containing slag

The invention relates to the field of titanium-containing slag smelting methods, and particularly relates to a method for preparing titanium carbide slag by using titanium-containing slag which shortens reaction time and reduces smelting power consumption. The method comprises the following steps of, a, adding titanium-containing slag into a submerged arc furnace or an electric arc furnace and increasing the temperature; and when the temperature reaches a set value, adding a carbonaceous reducing agent, and making the carbonaceous reducing agent react with the titanium-containing slag in the furnace; b, taking a flue gas temperature and a CO concentration value in the furnace as a judgment basis of a reaction control, and adjusting an input power and a feeding speed of the reducing agent according to the flue gas temperature and the CO concentration value in the furnace, thus making the CO concentration value the control reaction maintain the optimal stable state; and c, ending the feeding of the reducing age