Magnesia, the main raw material of magnesia carbon brick, its quality has a very important influence on the performance of magnesia carbon brick. How to choose magnesia is the key to produce magnesia carbon brick. There is fused magnesia and sintered magnesia, they have different characteristics. Fused magnesia: large grain, less impurities and silicate phase, high direct combination of grain with less grain boundary. Sintered magnesia: fine grain, more impurity and silicate phase, poor direct combination.

For the raw materials of magnesia, in addition to the chemical composition, in the organizational structure, also requires high-density and large crystallization. Therefore, as the main raw material of magnesia carbon brick, magnesia quality indicators should consider the following content: 1. Magnesium oxide content (purity); 2. Types of impurities, particularly C/S and B2O3 content; 3. Magnesia density, stomatal aperture, stomatal morphology, etc. (sinterability).

The purity of magnesia has a great impact on the slag resistance of magnesia carbon brick. The higher the content of MgO, the less the impurity, the lower the division degree of silicate phase, the higher the direct binding degree of periclase, the increase the resistance to slag penetration and melting loss. The impurities of magnesia are mainly calcium oxide, silicon dioxide, iron oxide. If the impurities content is high, especially boron oxide compounds, will adversely affected the refractoriness and high temperature performance of magnesia. There have many kinds of refractory products in our factory. Such as fire brick for sale, refractory nozzle, refractory firebrick and other refractory products. Welcome to view our website to know more kinds of refractory products.

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