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Help CenterLow Density Lightweight Insulating Refractory Castable High Alumina Insualtion Castables
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High Alumina Insulating Castables
Introduction
High Alumina Insulating Castable Refractory, also called Lightweight High Alumina Insulating Castable, the proportions of the components alumina (AL2O3) is in the range of 45~80%, generally which is mainly used for linings of heating equipment such as heat insulating layer 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.
Features
High refractoriness
Stable chemical properties, good chemical corrosion performance
Ideal plasticity
Low shrinking
High compression strength, good structural integrity
Physical & Chemical Index
Item |
High Alumina Insulating Castable |
|||
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 Temperature, ℃ |
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 |
|
Characteristics
1. High alumina refractory castables have compact bulk density, low porosity, strong resistance to slag or solution penetration
2. High alumina refractory castable resistance to rapid cooling, heat shock, and thermal shock resistance.
3. High alumina refractory castable has high compressive strength and good wear resistance.
4. High alumina refractory castables are 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 refractory castable has chemical resistance.
Applications
High-aluminum insulating castables are suitable for heating furnaces, soaking furnaces, heat treatment furnaces, rotary kiln; 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 lining. It can also be used to make large prefabricated blocks and linings.
Our Services
Free samples are available on an EXW basis;
Strict QC and fast delivery
High-quality goods, Perfect Pre-sales and after-sales service.
We will update you on any production process after placing an order.
We have a special after-sales team to solve your problem while using our products.
Any questions will be get our feedback the first time.
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