Preparation method and application of modified glass pumice

The invention discloses a preparation method of modified glass pumice, which comprises the following steps: grinding waste glass, cement blocks and red bricks into powder, mixing, adding calcium carbonate and boric acid according to a mass ratio of calcium carbonate to raw material powder of 1: (4-6) and a mass ratio of boric acid to raw material powder of (0.5-2): 10, uniformly mixing, heating to 1550-1700 DEG C in a muffle furnace, and naturally cooling to room temperature to obtain the modified glass pumice. The preparation method comprises the following steps: crushing glass pumice into powder, washing with water, drying, crushing to 16-18 meshes to obtain glass pumice, mixing an aluminum salt solution with the concentration of 0.65-1mol/L and a sodium hydroxide solution with the concentration of 1mol/L in an isovolumetric manner, adding the glass pumice into the mixed solution, fully mixing, filtering, drying, firing in a muffle furnace, washing with water, and drying to obtain the glass pumice. Compared