high quality high alumina insulating castables

low price high alumina insulating castables

high alumina insulating castables for sale

high alumina insulating castables in stock

High Alumina Insulating Castables

Send Email Inquiry Now

Introduction of High Alumina Insulating Castables

High alumina insulating castables refractory, also called lightweight high alumina insulating castables, is mainly used for linings of heating equipment such as heat insulating layers in high-temperature industrial furnaces. These materials have the advantages of medium-lightweight and good thermal insulation properties. Its excellent features of good mixability, strong adhesive property, long initial setting time and operable time in high-temperature construction, fast increasing of strength, strong anti-permeability, no need for acidizing, and easy for the mortar joint dense of brickwork can remarkably improve the air impermeability, integrality, and lining corrosion resistance of chimney lining, which is the ideal cementing material of chimney stack, high-temperature flue, and air flue lining.

Basically, they are made of high alumina aggregate and powder, mixed with a binder and water reducer.

Moreover, the Aluminum Oxide or Al₂O₃ content in this refractory material is over 48%.

Features of High Alumina Insulating Castables

High refractoriness

Stable chemical properties, good chemical corrosion performance

Ideal plasticity

Low shrinking

High compression strength, good structural integrity

Application of High Alumina Insulating Castables

High-aluminum insulating castables are suitable for heating furnaces, soaking furnaces, heat treatment furnaces, rotary kilns; various high-temperature burner linings, heating furnace pipe packing linings, steel furnace scouring device components, and petrochemical catalytic cracking reactor High-temperature wear-resistant lining; blast furnace iron channel, iron furnace iron trough, hot metal pretreatment with the overall dust gun and other linings. It can also be used to make large prefabricated blocks and linings.

Characteristics of High Alumina Insulating Castables

1. High alumina insulating castables have compact bulk density, low porosity, and strong resistance to slag or solution penetration

2. High alumina insulating castables resistant to rapid cooling, heat shock resistance, and thermal shock resistance.

3. High alumina insulating castables have high compressive strength and good wear resistance.

4. High alumina insulating castables have easy to construct, high alumina refractory castables can be cast into a whole lining, and high alumina refractory castables can be customized into prefabricated masonry.

5. High alumina insulating castables have chemical resistance.

Chemical & Physical Index

Item		High Alumina Insulating Castables
Model		XHJCAL-50	XHJCAL-68	XHJCAL-80
Chemical Composition（%）	SiO₂	≤8.0	≤1.0	≤0.5
	Al₂O₃	≥50.0	≥68.0	≥80.0
	Fe₂O₃	≤2.5	≤0.7	≤0.5
	R₂O	≤0.4	≤0.4	≤0.4
	S	≤0.1	≤0.1	≤0.1
	Cl	≤0.1	≤0.1	≤0.1
Refractoriness, ℃		1730	1790	1790
Working Temp, ℃		1450	1500	1600
Linear Dimensional Change （%）		±0.5 1350℃×3h	±0.5 1450℃×3h	±0.5 1450℃×3h
Dry Density, g/cm3		≥2.40	≥2.55	≥2.70
Breaking strength (MPa)	6h	--	--	--
	1d	≥5.5	≥5.0	≥4.5
	3d	≥6.5	≥6.0	≥5.5
Compressive Strength (MPa)	6h	--	--	--
	1d	≥40	≥40	≥30
	3d	≥50	≥50	≥40