98 fused magnesia production process

Technical Field The present invention relates to a method for smelting and processing high-temperature refractory materials, in particular to a production process method for fused magnesia. 97 fused magnesia

Magnesia is magnesia, which can be made from magnesite, brucite, dolomite, serpentine, olivine and other minerals. Generally, magnesite and brucite can be used as raw materials to calcinate and decompose into magnesia. The crystallization is different due to different calcination temperatures. The magnesia calcined at 600-1000℃ is called active magnesia, and the oxidation obtained by calcination at 1400-1800℃ Magnesium is called dead burnt magnesia, and the above two kinds of magnesia are also commonly known as light magnesia, commonly known as furnace magnesia.

The current process for producing fused magnesia is generally to use electric furnaces for smelting and direct smelting of magnesia ore. The disadvantage is that it consumes a lot of electricity. Moreover, the existing process is used to smelt one ton of qualified fused magnesia (purity higher than 96.5). %) 80 kilograms of carbon rods are also consumed. Relevant materials ("Special Refractories", "Magnesia Technology", "Essays on High Temperature Refractories") show that light magnesia can be heated by electric arc to generate cubic The structure of the crystal is heavy magnesia with a melting point of 2800°C, that is, fused magnesia. The magnesia produced by the furnace can be recrystallized by smelting in an electric furnace to produce fused magnesia.