Production method of anti-seepage air-permeable sand

The invention relates to a production method of anti-seepage air-permeable sand. The production method comprises the following steps: (1) adding treated sand into a drying and frying machine and heating the sand to 200 to 300 DEG C; drying the sand, wherein the moisture content of the sand is less than 0.03 to 0.2 percent; taking out the sand and storing in a dry place; (2) adding the sand into astirring machine when the temperature of the sand is reduced to 30 to 35 DEG C, wherein the rotary speed of the stirring machine is 80 to 120r/min; then adding a treatment agent and sufficiently stirring for 15 to 25min; keeping the temperature which is no less than 30 DEG C; (3) after treating by the treatment agent, placing for 5 to 7 days, wherein in a placement process, the sand is prevented from being affected with damp and mixed with impurities. The production method of the anti-seepage air-permeable sand, provided by the invention, has the advantage of high yield, short flow, high sandproduction efficiency, low