Comprehensive utilization method of boron mud

The invention belongs to the field of solid waste recycling, and particularly relates to a boric sludge utilization method which comprises the following steps: 1) in a reaction kettle, enabling boric sludge to fully react with an aqueous solution of sulfuric acid; (2) adding water into a system after the reaction in the step (1) until an unsaturated suspension is formed; 3) adding light calcined magnesia into the suspension, stirring until the pH value of the mixed solution is 5-8.5, then adding hydrogen peroxide into the mixed solution, stirring, and filtering to obtain a magnesium sulfate solution and filter residues; 4, the obtained filter residues react with sodium hydroxide and water, and filtering is carried out to obtain a water glass solution. According to the method for extracting magnesium and silicon from the boric sludge, short-process impurity removal is adopted, the technology is simple, operation is easy and convenient, and implementation is easy. The method for extracting magnesium and silicon