In order to meet the needs of the environmental protection industry and meet the needs of incinerators, various countries have developed and used various excellent refractory materials, and have achieved remarkable results. It has become a top priority to continue research and development of refractories with excellent performance.

SiC refractories are often used in domestic waste incinerators due to their good performance. Their excellent performance is mainly manifested in anti-erosion and anti-scour ability, good thermal shock resistance and high abrasion resistance. The commonly used SiC blocks or bricks are bonded by silicate or nitride, in which the content of SiC is different. Under the influence of temperature and different atmosphere, SiC is easily decomposed when it is greater than 800 ° C, which is suitable for volatile SiC products. Development and its disadvantages, while the silicon oxide layer formed on the SiC surface can protect the SiC grains from further erosion. The formation of silicon oxide is also affected by water vapor, and is also promoted by water vapor. When SiC is greater than 1000 ° C, the surface of the phosphate quartz and cristobalite obtained by crystallization and formation has many cracks, so that the corrosion resistance is weakened and reduced. The service life.

At present, it is generally used to cool the combustion chamber lining so that the surface temperature of the combustion chamber is lower than 1000 ° C, thereby suppressing the above adverse effects. In the region where the temperature in the incinerator reaches 1100 ° C, a special SiC product combined with a siliceous binder has the advantage of forming a closed glassy silicate layer locally to prevent erosion. At temperatures above 1200 ° C, the nitride-bonded SiC material has a higher lifetime than the nitride-bonded material due to its optimized stable layer.

Studies have shown that when the surface temperature reaches 850 °C, the SiC content is preferably 50%-70%; in the region of 850-1100 °C, the SiC content is 90% is more suitable; and under the condition of melt erosion (1250- 1350 ° C), chrome corundum high aluminum products are superior to SiC products. The Al2O3-SiC self-flowing low-cement castable incinerator lining in some countries is not only simple but also beneficial to protect the reactor anchor from erosion. The multi-layer double-layer protection system can regulate the heat conduction freely, but it is still under discussion. .