Because high-purity magnesia has good high-temperature flexural strength, slag resistance and corrosion resistance, which can improve the service life of the steelmaking furnace lining, it is widely used as a lining refractory material for steelmaking furnaces; High-quality materials for refractory materials (high-grade alkaline refractory materials); can also be used as fillers to make thermocouples and thermal insulation materials (household appliances, etc.); can also be used as ceramic raw materials and sintering aids, as well as metallurgy, building materials, chemicals, national defense , medical equipment, etc.