During the operation of circulating fluidized bed boiler, the selection of refractory material is very important. As a high-quality material specially designed for circulating fluidized bed boilers, high-strength wear-resistant refractory castable has become a leader in the field due to its high strength, wear resistance and excellent construction performance.
High-strength wear-resistant castable is a cement-based composite one-component dry powder mortar, which is made of high-strength cement, mineral admixture, high-strength aggregate and anti-cracking and wear-resisting agent through industrial production. The high-strength wear-resistant castable can be used by adding water and stirring on site, and the construction workability is good. The anti-wear layer of a certain thickness is formed on the surface of the silo or ore tank through artificial plastering, and the technical requirements can be reached after normal maintenance. The castable has the characteristics of high wear resistance, high bonding strength with the foundation concrete (steel silo), strong impact resistance, high compressive strength, good durability and long service life. High strength and wear resistant castable is specially used in metallurgy, coal, thermal power, chemical, cement and other industries of slag sluice, mine tank, coal discharge tank, hopper, material silo lining anti-wear layer and water conservancy, hydropower, port and other projects of the sluice gate, discharge hopper anti-wear layer, to protect the foundation concrete (or steel silo) role.
Core features of high-strength wear-resistant castable:
High strength: During the preparation of high strength wear-resistant castable, key performance indicators such as compressive strength and flexural strength have been significantly improved through optimized formulation and advanced technology. This high strength characteristic makes it able to withstand the test of the complex stress environment inside the circulating fluidized bed boiler, and effectively extend the service life.
Wear resistance: During the operation of circulating fluidized bed boilers, refractory materials face the erosion of high-speed airflow and solid particles, so wear resistance is crucial. By adding special wear-resistant agent, high strength wear-resistant castable significantly improves its anti-wear ability, effectively reduces material loss and maintenance costs.
Good construction performance: high-strength wear-resistant refractory castables show good fluidity and plasticity in the construction process, and can easily adapt to the construction needs of various complex shapes and structures. At the same time, the curing speed is fast, and the volume stability after curing is good, which brings great convenience for the construction.
As a kind of high efficiency and environmental protection combustion equipment, CFB boiler has the characteristics of bed circulation and high temperature combustion during operation. These characteristics put forward higher requirements for refractory materials. High strength wear-resistant castable is tailored to these characteristics. Its high strength and wear resistance, can effectively resist the bed cycle and high temperature combustion caused by erosion and wear; Its excellent construction performance can meet the construction requirements of the complex structure of the circulating fluidized bed boiler. When traditional refractories are used in a large circulating fluidized bed boiler, problems such as wear and spalling frequently occur, which seriously affect the stable operation of the boiler. The fire resistance of the boiler has been improved significantly after the transformation with high strength and wear-resistant castable. After long-term operation verification, the material shows good wear resistance and high temperature resistance, effectively prolonging the service life of the boiler, and reducing the maintenance cost.
With its high strength, wear resistance and excellent construction performance, the high strength wear-resistant refractory castable perfectly solves the problem of refractory loss faced by circulating fluidized bed boilers during operation. Its successful application not only improves the operating efficiency of the boiler, but also brings real economic benefits to the enterprise. In the future development, with the continuous innovation and optimization of technology, I believe that high-strength wear-resistant castable will show its unique advantages and value in more fields.