The main functions of adding steel fiber in aluminosilicate fiber cotton refractories are as follows: strengthening toughness, improving stress-strain resistance, improving mechanical impact resistance; improving thermal shock resistance, improving cracking and spalling resistance; restraining linear shrinkage after curing, drying and heat treatment. The amount of steel fiber is generally 0.6-2.5% (volume ratio).
However, the amount of steel fiber should not be too large. If the amount of steel fiber is too much, the high-temperature physical and chemical properties of refractory castable will be deteriorated. For example, steel fiber will make the residual linear expansion of castable after high temperature burning. At the same time, the content of iron oxide in castable is increased and its corrosion resistance is reduced. If too much steel fiber is added, the workability of castable will become worse.
Through the content explained in the article, you can generally understand the specific significance of aluminum silicate fiber cotton, can not add excessive steel fiber, hope the content explained in the article is helpful to you, in the future operation and use, we should pay more attention to this requirement.


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