The difference between high alumina castable and high alumina steel fiber castable

The difference between high alumina castable and high alumina steel fiber castable

The main difference between high-aluminum castables and high-aluminum steel fiber castables is whether steel fibers are added. The following is a detailed comparison between the two:

Composition and preparation

High-alumina castable: It is mainly made of high-alumina bauxite, with binders and other additives. It does not contain steel fibers and is a traditional amorphous refractory material.

High-alumina steel fiber castable: On the basis of high-alumina castable, heat-resistant stainless steel fibers (such as 446#, 310#, 330#, 430# and other models are also used), are added, and the addition amount is usually 1%~3%. These steel fibers can significantly improve the mechanical properties and thermal shock resistance of the castable.

Performance characteristics

High-aluminum castable:

Good high temperature resistance, able to maintain stable performance at high temperature.

Good thermal shock resistance, able to withstand temperature changes such as hot and cold alternation.

Good chemical corrosion resistance, good resistance to chemical substances such as acids and alkalis.

Good load resistance, able to withstand various loads and vibrations.

Easy to construct, with good fluidity and plasticity.

High-aluminum steel fiber castable:

Due to the addition of steel fibers, its strength and toughness have been significantly improved.

The thermal shock resistance and anti-stripping performance have also been enhanced, and it can withstand greater thermal stress.

Good wear resistance, suitable for parts that need to withstand material erosion and wear.

Application scenarios

High-aluminum castables: Mainly used for the linings, burners, high-temperature sections of lime shaft kilns, rotary kiln heads, preheating belts, etc. of various heat treatment furnaces.

High-aluminum steel fiber castables: Mainly used for the linings of high-temperature cyclone separators in power plant boilers, combustion chambers, coal feed ports, and the linings of cement rotary kiln cooling cylinders and other wear-resistant parts. In addition, it can also be used to repair industrial kilns to improve the toughness, strength and thermal shock resistance of the cast lining.

In summary, there are significant differences between high-aluminum castables and high-aluminum steel fiber castables in terms of composition, performance characteristics and application scenarios. The choice of castable depends on the specific use environment and requirements.