Production process of 98 fused magnesia

The invention relates to a method for smelting processing high-temperature refractories, in particular to a method for producing fused magnesia. 98 fused magnesia

Magnesia is magnesium oxide, which can be made magnesite, brucite, dolomite, serpentine, olivine other minerals. Generally, magnesite brucite can be used as raw materials to calcine decompose into magnesia, which crystallizes differently due to different calcination temperatures. The magnesia calcined at 600-1000 ℃ is called active magnesia, the magnesia calcined at 1400-1800 ℃ is called dead burned magnesia. The above two kinds of magnesia are also known as light magnesia, commonly known as furnace magnesia

At present, electric furnace is widely used to produce fused magnesia. The direct smelting of magnesia ore has the disadvantage of large power consumption. Moreover, 80 kg carbon rods are needed for smelting one ton of qualified fused magnesia (purity higher than 96.5%) with the existing process. The relevant data (special refractories, magnesia Technology high temperature refractories) show that it will be light The crystal of cubic structure can be formed by arc heating, that is, heavy magnesia with melting point of 2800 ℃, that is, fused magnesia. The magnesia produced in furnace can be recrystallized by electric furnace melting to produce electric fused magnesia.