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math, physics, and chemistry
>
magnesium silica brick
high-silica magnesite brick
又称高硅镁砖。以方镁石为主晶相、镁橄榄石(2mgo·sio2)为第二晶相(作为主要结合相)的镁质耐火材料。
镁硅砖
的性能和镁砖大致相同,但其荷重软化开始温度比一般镁砖高,只是抗碱性渣的性能较差。为了充分利用sio2含量为5%~11%的高硅镁砂,按制造镁砖的生产工艺来制造
镁硅砖
,不同的是由于镁橄榄石不易烧结,因此
镁硅砖
的烧成温度应适当提高。可以用于炼钢平炉和玻璃熔窑的蓄热室、冶金电炉炉底、炉墙和有色金属冶炼炉的炉衬。