Introduction and Application of Wear-resistant Refractory Castables

In high-temperature working environments such as alumina gas suspension roasters and oil refining catalytic cracking units, the media content is high, high-speed airflow erosion and abrasion are serious, and the use conditions are very harsh. To improve the service life and stability of these parts, wear-resistant and refractory castables need to be used as lining materials. Wear-resistant refractory castables require dense and hard refractory aggregates, refractory powders of suitable fineness, excellent binders, ultrafine powders, and admixtures to achieve densification and high strength of the material.

Selection and proportioning of refractory aggregates

The refractory aggregate used in wear-resistant refractory castables must have high density and hardness to increase the material’s compression and wear resistance. Multi-stage particle gradation can achieve the maximum packing density and improve the density of the material. Through reasonable proportion design, high-quality refractory aggregate preparation can be achieved.

Fineness requirements for refractory powder

The refractory powder in wear-resistant refractory castables needs to have suitable fineness, which is generally required to be greater than 0.09mm and greater than 90%. By selecting the appropriate particle size and distribution range, the density and wear resistance of the material can be increased, and the strength of the castable can be improved.

Application of binders, ultrafine powders, and admixtures

To achieve densification and high strength of wear-resistant and refractory castables, it is essential to select excellent binders, ultrafine powders, and admixtures. Binders can promote the bonding between aggregates and powder to form a stable refractory castable structure. The addition of ultrafine powder can fill pores and increase the density and strength of the material. Using admixtures can improve the fluidity and plasticity of materials, and improve the construction performance and working effect of castables.

Material properties and application cases

After the above process design and proportion optimization, the wear-resistant and refractory castable can achieve high strength and good wear resistance. This type of material has been widely used in high-temperature working environments such as alumina gas suspension roasters and oil refining catalytic cracking units and has achieved good results. For example, using wear-resistant refractory castables as linings in alumina gas suspension roasting furnaces can effectively extend the service life of the equipment and improve production efficiency and product quality.

in conclusion

Wear-resistant and refractory castables have important application value in high-temperature working environments. By selecting appropriate refractory aggregates, refractory powders, as well as high-quality binders, ultrafine powders, and admixtures, the densification and high strength of the material can be achieved, and the wear resistance and service life of the material can be improved. This type of material has been widely used in various high-temperature industrial equipment and has achieved good results.