The strength of the lining of circulating fluidized bed (CFB) boilers is extremely important. If improper materials are selected or effective quality control is not carried out during the construction process, it is likely to cause large-area collapse of the castables during operation and even severe wear of the heating surface tubes. Regarding the selection of wear-resistant and refractory material manufacturers, since there are many manufacturers producing wear-resistant and refractory materials on the market with varying quality, special attention must be paid when selecting a manufacturer. It is best to contract the materials, construction, and after-sales service to a reputable and qualified manufacturer to ensure that the lining of the CFB boiler achieves the design purpose.

After the wear-resistant and refractory materials are delivered to the factory, secondary re-inspection should be carried out in a timely manner. The test blocks can only be used for construction after all physical and chemical performance indicators have been inspected by a professional inspection agency and meet the requirements. Refractory materials should be stored in a moisture-proof and rain-proof place as required to prevent material deterioration, which may reduce or even lose their service performance.

Material selection should start with the physical and chemical properties of the materials (including wear resistance, heat resistance, corrosion resistance, thermal conductivity, stability, thermal expansion, shrinkage rate, compression and flexural resistance, and bulk density), while considering economy. A comprehensive comparison should be made in combination with the characteristics of the lining position, the structure of the components bearing the lining, and the requirements for temperature and wear resistance to achieve advanced technology, reliable structure, and economic rationality.

CFB lining materials have been continuously developing with the development of boilers towards high parameters, large capacity, and new technologies. Many new varieties, new construction methods, and technologies have been developed, which have promoted the innovation and improvement of the lining structure, continuously improved the wear and heat resistance, and driven the progress of fluidized bed combustion technology.

Through the above necessary procedures, the strength of the lining of circulating fluidized bed (CFB) boilers can be greatly enhanced.