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With the development of iron and steel industry, smelting conditions are increasingly strengthened. Many refractory materials used in iron and steel smelting equipment have more strict requirements on the quality of main raw material, magnesia, so the research and manufacturers of refractory materials have to develop higher quality magnesia to meet this requirement.
In the production of traditional magnesite refractory, the high temperature strength and corrosion resistance of magnesite are emphasized.Therefore, the use conditions of magnesite become very strict, so used in refractory magnesite, in addition to chemical composition, in terms of organizational structure, also requires high density and large crystallization.Therefore, the quality index of magnesite production should generally include the following contents:
1: quality, or purity, of magnesia.
2: the types of impurities must be as few as possible.
3. Volume density, pore diameter and pore shape of magnesite.
4. Grain size and crystal morphology of periclase.
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