Nano sand and preparation method thereof

The invention discloses nano sand and a preparation method thereof. The nano sand is prepared from sand and waste oil; the preparation method comprises the steps that the sand is loaded into spiral rolling heating equipment; the spiral rolling heating equipment is started, and heating is conducted during rolling; when the temperature reaches 200-240 DEG C, the oil is sprayed onto the sand in the spiral rolling heating equipment, spraying is conducted during rolling, and 13-18 minutes later, heating is stopped; a mixture is poured into a container and cooled; the mixture is crushed by a crusherand then sieved by an 80-mesh sieve to obtain the nano sand. Compared with existing products, the nano sand has the advantages that the nano sand can be used in the technical fields of desertification control and sand stabilization with sand, water prevention, air purification, lampblack purification, hazardous chemical exhaust gas filtration, lakeside sewage purification, marine oil leakage adsorption recovery, oil fiel