ABSTRACT The influence of temperature on the microstructure and physical properties of corundum refractory for blast furnace are investigated by a high-temperature test. The results show mullite and glass phases are generated by the in situ reaction in the matrix of corundum brick under high temperature. With the increase in temperature, the net structure is gradually formed in the matrix, and the multi-porous entirety is finally formed in the matrix at 1500°C. The cold compressive strength of corundum sample increases first and then decreases with the increase in temperature. The flexural strength of corundum sample is the highest at 1150°C, while with further increasing of temperature, the flexural strength of corundum sample decreases. The apparent porosity of corundum sample is the lowest at room temperature, but the apparent porosity of corundum sample fluctuates within the same level after the temperature exceeded 1150°C.

中文翻译：

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温度对高炉炉缸中刚玉耐火砖组织和物理性能的影响

摘要 通过高温试验研究了温度对高炉用刚玉耐火材料组织和物理性能的影响。结果表明，刚玉砖基体在高温下发生原位反应生成莫来石相和玻璃相。随着温度的升高，基体中逐渐形成网状结构，最终在1500℃的基体中形成多孔整体。刚玉试样的冷压强度随着温度的升高先增大后减小。刚玉试样的抗弯强度在1150℃时最高，而随着温度的进一步升高，刚玉试样的抗弯强度下降。刚玉样品的表观孔隙率在室温下最低，