Lithium-containing sodium cryolite and preparation method thereof

The invention provides lithium-containing sodium cryolite and a preparation method of the lithium-containing sodium cryolite. The lithium-containing sodium cryolite comprises the following components in percentage by mass: 53 to 56% of F, 12 to 15% of Al, 24 to 27% of Na, and 1 to 5% of Li. The invention also provides the preparation method for the lithium-containing sodium cryolite. The preparation method comprises the steps as follows: (1) preparing an ammonium fluoride solution; (2) preparing a sodium chlorate and lithium salt mixing solution; (3) preparing lithium-containing sodium cryolite size; and (4) filtering: filtering the lithium-containing sodium cryolite size, and drying the filter cake to obtain the product. The lithium-containing sodium cryolite provided by the invention is stable in quality, and can meet the requirement that the sodium cryolite is necessary for the aluminum electrolyzing smelting; and the lithium-containing sodium cryolite has the function of the lithium cryolite which can red