- Time:Jun 06, 2023
Magnesia refractory is a type of refractory material that is made primarily from magnesium oxide (MgO). Magnesia refractories have excellent high-temperature performance and are widely used in various high-temperature industrial furnaces, such as steelmaking furnaces, cement kilns, glass melting furnaces, and non-ferrous metallurgical furnaces.
Magnesia refractories can be classified into three main categories based on their MgO content:
1.Direct-bonded magnesia brick: This type of magnesia refractory is made by sintering high-purity magnesia raw materials at a high temperature without any additives. It has excellent thermal shock resistance, high corrosion resistance to basic slag, and good high-temperature strength.
2.Fused magnesia brick: This type of magnesia refractory is made by melting high-purity magnesia raw materials in an electric arc furnace or a rotary furnace, and then casting, cooling, and crushing the fused material to produce the final product. It has excellent chemical stability, high melting point, and high thermal conductivity.
3.Dead-burned magnesia brick: This type of magnesia refractory is made by calcining natural magnesite or magnesia clinker at a high temperature of up to 1800℃. It has a high refractoriness, strong resistance to alkaline slag erosion, and good thermal shock resistance.
Magnesia refractories have many advantages, such as high-temperature resistance, corrosion resistance, and thermal shock resistance, making them ideal for use in various high-temperature applications.
