Production process method of fused magnesia
The present invention relates to a method for smelting high-temperature refractory materials, in particular to a production process method for fused magnesia. Fused magnesia
Magnesite is magnesium oxide, which can be made from magnesite, Brucite, dolomite, Serpentine subgroup, olivine and other minerals. Generally, magnesite and Brucite can be used as raw materials to calcine and decompose into magnesium oxide, which crystallizes differently due to different calcination temperatures. The magnesium oxide calcined at 600-1000 ℃ is called active magnesium oxide, and the magnesium oxide calcined at 1400-1800 ℃ is called dead burned magnesium oxide. The above two kinds of magnesium oxide are also commonly called light magnesium oxide, commonly known as furnace magnesia.
At present, the production process of electric fused magnesia is generally using electric furnaces for smelting, directly smelting magnesium ore. The disadvantage is that it consumes a lot of electricity. Additionally, using the existing process to smelt one ton of qualified electric fused magnesia (96.5%) requires an additional 80 kilograms of carbon rod. Relevant materials (such as "Special Refractory Materials", "Magnesia Technology", and "Collected Papers on High Temperature Refractory Materials") indicate that heating lightweight magnesia with an arc can generate cubic structured crystals, Heavy magnesium oxide with a melting point of 2800 ℃, also known as fused magnesia. Magnesia produced in furnaces can be recrystallized by electric furnace melting to produce fused magnesia.
