Keeping these points in mind can improve the thermal shock resistance of refractory castables? For details, please refer to the introduction of Annaijie refractory castable manufacturers

1, in the configuration of the addition of mullite raw materials, mullite is a synthetic raw material, with very high wear resistance and heat resistance, high hardness, uniform expansion, high softening point under load, excellent thermal shock stability, high temperature creep value, good chemical corrosion resistance and other characteristics.

2, use the difference between the expansion coefficient of aggregate and matrix line to balance the thermal shock of castable, reduce the thermal expansion rate of the material, try to choose the data with a relatively low thermal expansion rate, rising large aggregate + low expansion matrix, so that the combination of thermal shock resistance is very good.

3, the thermal shock of castable is very important, such as the circulating fluidized bed boiler which has its own wear capacity, as well as the load adjustment is relatively high boiler, it is very necessary to heat shock resistance castable. It can prevent the phenomenon of thermal expansion and cold contraction under the condition of running high temperature, and prevent the collapse and cracking of the expanded liner.

The castable with corundum as aggregate has good resistance to high temperature wear and good resistance to liquid corrosion. However, corundum castables do not have microcracks and large internal pores, and their thermal shock resistance is relatively poor compared with other aggregates. After the selection of corundum mullite composite aggregate refractory castable by Anetje Company, the thermal shock resistance of the castings is obviously improved