Compressive Creep Behavior of Low Porosity Fireclay Bricks (LPFBs) for Glass Furnace Regenerator

LPFBs are mainly applied in the lower party of glass furnace regenerator as checker works or walls. They are subjected to the loads of upper refractory materials at high temperature. So the creep behavior of them should be considered to predict the longevity of the regenerator. Two kinds of LPFBs were chosen as the test samples. It is shown that the creep rates of them under different stresses (0.1MPa, 0.2MPa, and 0.3MPa) and different temperatures (1200°C and 1280°C) are within 0.2%. LPFB1 with lower apparent porosity is more sensitive to temperature. LPFB2 is more sensitive to stress. The relationship between the creep and other mechanical properties is: the higher the Al2O3 content, the higher the bulk density, the lower the apparent porosity, and the higher the refractoriness under load of LPFB, the lower the total strain range of it. A model combined with phase diagram was built to analyze the microstructures and the creep curves with different shapes of the two LPFBs.