Patent ID: 8465680

Claim:
A method for pelleting spherical fine particle of sodium nitrate, comprising the steps of: 1) melting industrial sodium nitrate in a salt melting furnace, introducing the industrial sodium nitrate into a high-level insulation buffer tank, and then placing the industrial sodium nitrate into an atomizer located at the top of a pelleting tower to atomize the industrial sodium nitrate into fog droplets with a diameter falling within a range of 30 μm˜0.5 mm; 2) introducing freeze-dried high-pressure air in a tangent direction from an upper inlet pipe of the pelleting tower into the pelleting tower to drop sodium nitrate fog droplets obtained in step 1) spirally along a wall in the pelleting tower, so as to obtain spherical fine particles of sodium nitrate; 3) collecting the cooled spherical fine particles of sodium nitrate at the bottom of the tower, and packaging the spherical fine particles of sodium nitrate to obtain a product.