Steel Fiber Wear Resistant Castable

Steel fiber wear-resistant castable is a hydraulic refractory castable made of special grade bauxite clinker as aggregate, high-quality bauxite clinker and corundum fine powder as matrix, ultrafine powder and other composite materials as binders and additives, and stainless steel heat-resistant fiber.
Steel fiber wear-resistant castable has the following features:
1. It can inhibit the shrinkage of castable during curing, baking and high temperature use;
2. It can improve the toughness, mechanical impact resistance and mechanical strength of castable;
3. It can improve the thermal shock resistance of castable;
4. It can prevent the microcracks generated in castable from expanding or extending under the action of thermal stress, resulting in fracture or peeling;
5. It has good high temperature strength and high temperature corrosion resistance.
Steel fiber wear-resistant castable has the characteristics of good integrity, high strength, wear resistance, anti-stripping, impact resistance, good toughness, good thermal shock resistance, etc. Therefore, steel fiber wear-resistant castable is suitable for the outlet, top, side wall and other parts of the boiler and furnace. It is widely used in the steel, metallurgy, chemical and building materials industries. In CFB boilers, it is often used in the furnace mouth and side walls, top, cyclone separator straight section, cyclone separator top, return feeder and other parts.

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Description

Steel fiber wear-resistant castable is a refractory castable made of silicon carbide, corundum or special grade bauxite clinker as aggregate, high-quality bauxite clinker and corundum fine powder as matrix, various composite materials such as ultrafine powder as binder and additive, pure calcium aluminate cement and aluminate cement as binder and appropriate amount of admixture. It is a hydraulic refractory castable prepared with stainless steel heat-resistant fiber. Steel fiber wear-resistant castable has the characteristics of high flexural (tensile) strength, excellent thermal shock resistance, impact resistance and wear resistance. The heat-resistant steel fiber used in steel fiber wear-resistant castable should be selected according to the use conditions of thermal equipment and its appropriate dosage should be determined.

Compared with ordinary castables, after 10 cycles of rapid cooling and heating from 25℃ water to 1100℃ to 25℃ water, the flexural strength of steel fiber wear-resistant castables with 1% (volume%) heat-resistant steel fiber is 2-4.5 times that of ordinary refractory castables. After ten cycles, the flexural strength of ordinary refractory castables decreased by 40-60%, while the flexural strength of 1% (volume%) steel fiber wear-resistant castables decreased by only 10-30%. High-strength steel fiber wear-resistant castables are mainly used in other industrial furnaces in the building materials industry where refractory materials are required to have good anti-stripping and impact resistance. Steel fiber wear-resistant castables are successfully used as linings for various industrial kilns (including various types of cement kilns, drying furnaces, heating furnaces, etc.). The main parts of cement kilns are: cement rotary kiln mouth, wet rotary kiln heat-resistant steel chain belt, cement kiln cooler, cement kiln coal injection pipe, pre-decomposition kiln, preheater kiln and wet kiln mouth, multi-cylinder cooler annular elbow and multi-cylinder cooler material outlet square cylinder. These parts have the common requirements for steel fiber wear-resistant castables, which are to have good wear resistance, impact resistance and thermal shock resistance.

Steel fibre strengthened refracory canstable

Brands/Items			F-A	F-C	FH-75	FH-85	FH-90
Chemical composition %	Al₂O₃≥		70	87	70	80	90
	SiO₂≥		12-15	2	12-15	9-12
BD g/cm³≥	110℃×24h drying		2.50	2.89	2.50	2.80	2.88
	1100℃×3hAfter burning		2.42	2.80	2.42	2.70	2.80
CSS Mpa≥	110℃×24hdrying		70	70	80	85	90
	1100℃×3hAfter burning		40	40	80	85	90
MOR Mpa≥	110℃×24hdrying		9	9	12	15	18
	100℃x3h	After burning	5.5	6.5	12	15	18
	1100℃×3h-After 5 times of water cooling		4	5.5	5	6	7
PLC%	110℃×24h drying		0~-0.2	0~0.1	0~-0.1	0~0.1	0~0.1
	1100℃×3h After burning		-0.1~0.2	-0.15~0.3	0~-0.5	-0.1~0.1	-0.1~0.1
Max apple.temp ℃			1400	1500	1400	1500	1600
Water needed forinstallation %			9-11	8-10	7-8	6-8	6-7

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