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

Magnesia is magnesium oxide, can be made from magnesite, brucite, dolomite, serpentine, olivine and other minerals. Generally available magnesite, brucite as raw materials calcined decomposition into magnesium oxide, due to different calcination temperature and crystallization is different, calcined by 600-1000℃ magnesium oxide is called active magnesium oxide, calcined by 1400-1800℃ magnesium oxide is called dead burned magnesium oxide, the above two kinds of magnesium oxide is also known as light magnesium oxide, commonly known as furnace magnesia.

At present, the process method of producing electric fused magnesia is generally used for smelting by electric furnace, directly smelting magnesia ore, the disadvantage is that the power consumption is large, and 80 kilograms of carbon rods are consumed for each ton of qualified electric fused magnesia (purity is higher than 96.5%) melted by the existing process. Relevant data (" Special refractories ", "Magnesia Technology", "High Temperature Refractories") show that light magnesia can be heated by arc to generate cubic structure crystals, that is, heavy magnesia with a melting point of 2800 ° C, that is, fused magnesia. The fused magnesia produced by furnace can be produced by recrystallization after melting in electric furnace.