Overflow type desanding device for alumina powder

The utility model discloses an overflow type desanding device for alumina powder. The overflow type desanding device comprises a feeding box, a desanding box, desanding pressing cloth and an air chamber, the feeding box is communicated with a feeding port of the sand removing box, an air chamber is arranged at the bottom of the feeding box and the bottom of the sand removing box, and the sand removing pressing cloth is laid above the air chamber; the sand removing box comprises a box body I and a box body II, a stirring device I and an overflow device I are arranged in the box body I, and a stirring device II and an overflow device II are arranged in the box body II. The overflow type sand removing device for the alumina powder is simple, convenient to operate and good in sand removing effect, the sand removing rate can reach more than 95%, sand removing and filtering are carried out in a grading and layering mode, the material blocking phenomenon caused by long-term accumulation of impurity sand in a large a