Kyanite is a high-alumina mineral (Al₂O₃ content 58%-63%), and its core uses are in the production of high-alumina refractory materials (hot blast stove, blast furnace, cement kiln lining bricks), refractory aggregates for casting, and ceramic raw materials (to enhance the strength and heat resistance of ceramics). It can also be used to manufacture alumina, abrasive materials, etc.