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A Brief Analysis of the Influence of Impurities on the High Temperature Resistance of Light Clay Bricks

Date:2019-12-18 16:16 | From:Zhengzhou Sunrise Refractory | Author:admin
Today, Sunrise Refractories Group will discuss with you the influence of impurities on the high temperature resistance of light clay bricks. Everyone knows that during the manufacturing process of refractory bricks, some impurities will inevitably enter the clay bricks. So many customers may worry, will these impurities affect the high temperature resistance of clay bricks? Sunrise Refractories will explain this to everyone.
 
The small amount of impurities in the light clay bricks has a large adverse effect on the high temperature function of the light clay bricks. The effect of impurity components on the high-temperature function of clay bricks is related to the type and number of impurities. Different types of impurities have different effects on the high-temperature function of light clay bricks, and the effects of different impurity contents are different. The more types of impurity components, the greater the content of certain impurity components, the greater the impact on the high temperature performance of light clay bricks. The effect of impurities on the high temperature function of light clay bricks is actually the effect on the high temperature function of MgO and CaO in important mineral deposits. Impurities and CaO or MgO are set off against each other, forming certain low-melting-point mineral deposits, and liquid phase at high temperature, which reduces the high temperature resistance of lightweight clay bricks.
The important impurities in the lightweight clay bricks are Fe2O3, SiO2 and Al2O3. These three important impurities have little effect on the high temperature function of MgO, because they do not form low melting point minerals with MgO substrates, such as MgO and SiO2 substrates form M2S, melting point 1890 ℃; Al2O3 substrates form MA, melting point 2135 ℃ MgO can dissolve a lot of FeO without seizure of the liquid phase, and it also has a very strong ability to draw Fe2O3. The content of iron compounds in light clay bricks is generally below 1.5%. Therefore, the effect on the high-temperature function of MgO is very small.

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