Generally high alumina brick, the thermal shock stability and spalling resistance is poorer, number of thermal shock stability generally at about seven times.
Introduce of ZrO2 into the general high alumina brick production technology,when mixing,first mix the zirconium mullite powder and bauxite powder evenly,in this way, makes the high alumina brick matrix part to enhance the toughness.At the same time, by using the difference in coefficient of expansion of Al2O3 and ZrO2 formed tiny crack, resist the thermal stress, thus, greatly improving the thermal shock stability and spalling resistance.It number of thermal shock stability is more than 17 times, effectively improving the thermal shock stability, resist due to the rapid changes in temperature damage.
Spalling high alumina brick because of its superior performance in the general high alumina brick, often used for cement rotary kiln, lime kiln, kiln car and kiln furniture, etc., has received the good use effect.
