Steel fiber reinforced refractory castable is made up of super alumina clinker as aggregate, fine alumina clinker and corundum fine powder as matrix, ultra-fine powder and other composite materials as binder and additive, plus stainless steel heat-resistant fiber. At the same time, due to the addition of steel fiber, the overall strength of furnace wall is greatly enhanced after the material is poured.
In fact, the use method is basically the same as that of concrete. After the selected formula and raw materials are evenly stirred and processed, they can be compacted with a vibrating rod, and then cured and heated. Because of the particularity of the use part of the unshaped castable, the construction quality of the castable needs to be guaranteed according to the different site conditions.

On the basis of using high alumina clinker as aggregate and powder for its important part, adding appropriate steel fiber casting reinforced castable has the characteristics of high strength, good toughness, good thermal shock stability, strong peeling resistance and wear resistance. It is used in the parts where the temperature step changes easily lead to the damage of furnace wall.

Product application

It is widely used in the exit, top and side wall of boiler and furnace, steel, metallurgy, chemical industry and building materials industry; in CFB boiler, it is commonly used in the exit of furnace and side wall, top, straight section of cyclone separator, top of cyclone separator, return feeder and other parts.

Project indicators		Common class		High strength
		FA	FC	FHA	FHC
Al2O3,%		≥ 70	≥ 83	≥ 70	≥ 80
Flexural strength,Mpa	110℃	≥ 9.0	≥ 9.0	≥ 10.0	≥ 12.0
	1100℃	≥ 5.5	≥ 6.5	≥ 10.5	≥ 12.0
Compressive strength,Mpa	110℃	≥ 70	≥ 70	≥ 70	≥ 80
	1100℃	≥ 40	≥ 50	≥ 70	≥ 80
1100 ℃ - room temperature water quench and quench cycle for 5 times and then fold, MPa		≥ 4.5	≥ 5.5	≥ 5.0	≥ 5.0
Linear change rate (1100 ℃),%		± 0.4	± 0.5	± 0.4	± 0.5