Due to its high refractoriness and superior physical and chemical properties, high-alumina bauxite plays a key role in the foundry industry and is used in foundry sand, casting materials, coatings and other fields. It can not only resist the erosion of molten metal, but also improve the surface quality and dimensional accuracy of castings. With the advancement of technology, the application field of high-alumina bauxite continues to expand, and it will also play an important role in more high-end industries in the future.