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The Effect Of Pressure On The Quality Of Magnesia Brick
Date:2016-06-01 11:42 From:Zhengzhou Sunrise Refractory Author:admin
Due to the low plasticity and low moisture content of clay materials, the molding pressure has a big effect on the quality of magnesia brick.
If the pressure is too low, the green boady will be not dense, porous and weak and not easy to sintere. The properties of products will be reduced too.
The drying of the green body is not only the water evaporation process and but also the hydration process of magnesia particles. So, the drying stress should ensure the formation of minimum amount of hydrates when removing the moisture. In order to avoid the formation of cracks during the drying process, reasonable drying system should be made.
After drying, the moisture content should be no more than 0.3%. then fire the green body in down draft kilns. The firing temperature is 1550-1600 degree.
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