技术领域本发明涉及一种用于高温耐火材料冶炼加工的方法，特别是用于电熔镁砂的生产工艺方法。98电熔镁砂 镁砂就是氧化镁，可由菱镁石、水镁石、白云石、蛇纹石、橄榄石等矿物中制取。一般可用菱镁石、水镁石做为原料煅烧分解为氧化镁，因煅烧温度不同而结晶不同，经600-1000℃煅烧得到的氧化镁称活性氧化镁，经1400-1800℃煅烧得到的氧化镁称死烧氧化镁，以上两种氧化镁又通称为轻质氧化镁，俗称炉窑镁砂。 目前生产电熔镁砂的工艺方法是普遍采用电炉进行熔炼，直接熔炼镁矿石，不足之处是耗电量大，再者用现有工艺每熔炼一吨合格电熔镁砂(纯度高于96.5%)还需消耗80公斤碳精棒，有关资料(《特种耐火材料》、《镁砂工艺学》、《高温耐火材料论文集》)表明，将轻质镁砂用电弧加温，可生成立方结构的晶体，即熔点为2800℃的重质氧化镁，亦即电熔镁砂。用炉窑生产的镁砂，经过电炉熔炼使其再结晶，可生产出电熔镁砂。

Field of the Invention: The present invention relates to a method for smelting and processing high-temperature refractory materials, and particular to a process method for the production of electric-fused magnesia sand. 98 Electric-fused magnesia sand Magnesia sand is oxide, which can be obtained from minerals such as magnesite, hydromagnesite, dolomite, serpentine, and olivine. Generally, magite and hydromagnesite can be used as raw materials for calcination and decomposition into magnesium oxide. The crystallization is different due to different calcination temperatures. Magnesium obtained by calcination at 600-1000℃ is called active magnesium oxide, and magnesium oxide obtained by calcination at 1400-100℃ is called dead-burned magnesium oxide. The above two kinds of magnesium oxides are also called light magnesia, commonly known as furnace magnesia sand At present, the process method for producing electric-fused magnesia sand generally uses an electric furnace for smelting, directly smelting magnesite ore The disadvantage is that it consumes a large amount of electricity. Moreover, each ton of qualified electric-fused magnesia sand (with a purity of more than 9.5%) produced by the existing process still consumes 80 kilograms of carbon electrode. Relevant data (Special Refractories, Magnesia Sand Processing, and-Temperature Refractories Papers) show that when light magnesia sand is heated by an arc, it can form a crystal with a cubic structure, that is, magia with a melting point of 2800℃, that is, electric-fused magnesia sand. Magnesia sand produced by a furnace can be recized by an electric furnace to produce electric-fused magnesia sand.