What is the difference between mid-grade magnesia and dead-burned magnesia

What is the difference between mid-grade magnesia and dead-burned magnesia

The main raw material of mid-grade magnesia is 92% magnesia, which is pressed into balls by a briquetting machine. The ball shape of the light-burned magnesium powder is 30mm, and the 30mm magnesium oxide ball is calcined in a high-temperature oil shaft kiln or a coke shaft kiln. The calcined product is called mid-grade magnesia, which is mainly used to produce high-grade alkaline shaped or unshaped refractory materials, and its finished products are mainly used in metallurgy, building materials, non-ferrous metals, chemicals and other industries. In addition, mid-grade magnesia is used to manufacture metallurgical powder in metallurgy to join furnace bottom and furnace wall, to manufacture slurry spray lining: to manufacture magnesia brick and magnesia-chrome brick; It is also widely used in non-ferrous metal blowing furnaces and rotary furnaces. Lightly burnt powder

Dead-burned magnesia is mainly made of magnesite ore with a content of more than 46%. The magnesite ore is calcined and heated to 1400-1800 ℃ in a high-temperature shaft kiln. When the Mg(CO3) is completely decomposed, periclase is formed, which becomes a hard red-brown reburned Magnesium, which has high refractoriness. It is an ideal raw material for the production of unshaped refractory materials, and the products are used in steelmaking open hearths, electric furnace bottoms and ramming furnace linings.