Method for preparing Fenton-like catalyst and byproduct villiaumite product from fluorine-containing silicon slag

The invention discloses a method for preparing a Fenton-like catalyst and a byproduct villiaumite product from fluorine-containing silicon slag, and relates to the technical field of resource utilization of fluorine-containing silicon slag. The method comprises the following steps: step 1, adding water into the fluorine-containing silicon slag for dispersing, then adding transition metal, and dissolving to obtain a mixed system; step 2, adjusting the pH value of the mixed system to be alkaline, then reacting, and filtering and separating after the reaction is finished, so as to obtain a solid, namely the Fenton-like catalyst; and step 3, recovering villiaumite from the separated liquid. The fluorine-containing silicon slag is used as a raw material, the transition metal is added to react under the closed condition to prepare the Fenton-like catalyst, fluorine is separated and extracted at the same time, the prepared Fenton-like catalyst is large in specific surface area, high in catalytic activity and low in