Dechlorination method for chlorination process titanium extracting tailing slag

The invention relates to a dechlorination process for chlorination process titanium extracting tailing slag, and belongs to the field of metallurgy. A dechlorination method for chlorination process titanium extracting tailing slag includes the steps that the chlorination process titanium extracting tailing slag and water are stirred and mixed to form slurry, wherein the slag to water mass ratio is 1:2-4; and then qualified titanium extracting tailing slag is obtained in a filtering, washing and filtering manner, wherein the qualified titanium extracting tailing slag meets the condition that the chlorine ion content is lower than 0.2%, the water content is 12% by weight to 20% by weight. According to the dechlorination method, the stirring and filtering manner is adopted, the content of chloride ions in the chlorination process titanium extracting tailing slag can be effectively reduced, and the adverse effect of the chlorine ions in tailing slag comprehensive utilization is reduced; in addition, the stirring, filtering and burning manner is further used, free carbon in the tailing slag is removed, the color of the tailing slag is changed from black to grayish yellow, and application of the tailing slag to building materials is facilitated; butt joint of the tailing slag processing process and the Panzhihua steel high temperature carbonization and low temperature chlorination titanium contained blast furnace slag titanium extracting process is achieved; and the blank on the chlorination process titanium extracting tailing slag chlorination technology is filled.