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What problems should be paid attention to when using fused cast refractories?
Dec 07, 2018

Refractory for glass kiln:


 What problems should be paid attention to during the use of fused cast refractories?


Fused cast refractories are generally used on glass furnaces. The following problems should be noted during use:


1 Due to the compact structure and low porosity, the fused refractory material has no pores for buffering when it is subjected to thermal shock and uneven heating, and is easily broken. Therefore, when considering the material selection of the glass kiln, it is best not to use the fused refractory material in a place where the temperature changes greatly.


2 The thermal expansion curve of fused zirconium corundum brick has an abnormal mutation near 1000 °C, and the reversible phase transition of ZrO2 inside the brick body is accompanied by a large volume change. Therefore, when the glass kiln is ignited in the kiln, the temperature increase rate should not be too large or too fast in the temperature range of 900 to 1150 ° C (it is generally recommended that the heating rate does not exceed 15 ° C / hour).


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