98 Process method for producing magnesia-calcium sand by calcining dolomite of fused magnesia

FIELD OF THE INVENTION The present invention relates to a method for smelting and processing high-temperature refractory materials, especially a production process method for fused magnesia. Magnesium calcium sand properties

Magnesia is magnesium oxide, which can be prepared from minerals such as magnesite, brucite, dolomite, serpentine, and olivine. Magnesium-aluminum spinel can generally be calcined and decomposed into magnesia by using magnesite and brucite as raw materials. The crystallization is different due to different calcination temperatures. The magnesia obtained by calcining at 600-1000 ℃ is called active magnesia. The magnesia obtained by calcining at ℃ is called dead-burned magnesia. The above two types of magnesia are also commonly known as light magnesia, commonly known as furnace magnesia.

Magnesium Aluminum Spinel

At present, the technological method of producing fused magnesia is generally to use electric furnace for smelting and directly smelting magnesia ore. %) also needs to consume 80 kilograms of carbon fine rods. Relevant data ("Special Refractories", "Magnesia Technology", "High-Temperature Refractory Materials") show that the light magnesia is heated with an electric arc, which can produce cubic The crystal of the structure, that is, heavy magnesia with a melting point of 2800 ° C, that is, fused magnesia. The magnesia produced in the furnace can be recrystallized by smelting in an electric furnace to produce fused magnesia. Magnesium calcium sand properties