Bubble alumina
Application Industry: Refractory Raw Materials, Lightweight Insulating Refractories, and High Temperature Industrial Furnace Insulation
Application Equipment: Lightweight Insulating Castable, Lightweight Insulating Brick, High Temperature Furnace Back-up Lining, Petrochemical Reformer, Hydrogen Furnace, and Carbon Black Reactor
Size: Custom bubble alumina particle size from 0-0.2mm to 3-5mm per lightweight insulating refractory manufacturing requirement (free engineering on request)
Products Overview
Our Bubble alumina is a high-performance lightweight insulating refractory aggregate engineered for lightweight insulating castable, lightweight insulating brick, high temperature furnace back-up lining, and petrochemical reformer insulation service. Also known as alumina hollow sphere or alumina bubbles, this product is manufactured by Zhengzhou caihua from high purity Al2O3 raw material through high temperature melting and atomization process to produce stable, hollow sphere structured aggregate. The product family features high alumina purity 99 percent, hollow sphere structure, low bulk density 0.4-1 g/cm3, and high temperature resistance up to 1825 °C.
The Bubble alumina product family is offered in two engineering-proven chemistry grades per customer specifications. The High purity grade features Al2O3 content minimum 99 percent, SiO2 content maximum 0.2 percent, Fe2O3 content maximum 0.1 percent, and Na2O content maximum 0.3 percent for high purity atmosphere industrial furnace service. The High strength grade features Al2O3 content minimum 98.5 percent, SiO2 content maximum 1 percent, Fe2O3 content maximum 0.08 percent, and Na2O content maximum 0.25 percent for higher mechanical strength high temperature refractory service. Both grades deliver Stacking density 0.4-1 g/cm3, Rate of reduction maximum 15 percent, and Size 0-7 mm particle size distribution per customer specifications.
Sourced from our Xinmi City, Zhengzhou, Henan, China facility, each Bubble alumina grade is engineered to ASTM, GB/T, and ISO refractory raw material standards. For an overview of the broader catalogue, see the Refractory Raw Materials category, or contact our technical sales team for a free consultation against your lightweight insulating refractory manufacturing requirement.
Product Features
Features:
- Manufactured by Zhengzhou caihua as high purity Al2O3 bubble alumina also known as alumina hollow sphere for lightweight insulating refractory service
- Engineering-proven characterized with high alumina purity 99 percent, hollow sphere structure, low bulk density 0.4-1 g/cm3, low thermal conductivity, and high temperature resistance up to 1825 °C
- Two chemistry grades covering High purity grade with Al2O3 content minimum 99 percent and High strength grade with Al2O3 content minimum 98.5 percent for matching different lightweight insulating refractory requirements
- Low impurity chemical composition with Fe2O3 content maximum 0.1 percent, SiO2 content maximum 0.2 percent, and Na2O content maximum 0.3 percent for high purity atmosphere service
- Widely used as the bubble alumina for lightweight insulating castable, lightweight insulating brick, high temperature furnace back-up lining, and petrochemical reformer insulation service worldwide
Product Specification
Bubble alumina is engineered per buyer’s lightweight insulating refractory manufacturing requirement. Custom chemistry and grade available on request.
| No | Item | High purity | High strength |
|---|---|---|---|
| 1 | Chemical Composition (%) | Al2O3 ≥ 99 | Al2O3 ≥ 98.5 |
| SiO2 ≤ 0.2 | SiO2 ≤ 1 | ||
| Fe2O3 ≤ 0.1 | Fe2O3 ≤ 0.08 | ||
| Na2O ≤ 0.3 | Na2O ≤ 0.25 | ||
| 2 | Stacking density, g/cm3 | 0.4-1 | |
| 3 | Rate of reduction, % | ≤ 15 | |
| 4 | Size, mm | 0-7 | |
Note: Bubble alumina chemistry data is per customer specifications. Max Working Temperature 1825 °C per industry standard reference. Custom chemistry, grade, and particle size available on request. For project-specific chemistry and grade, contact CH Refractories engineering.
Product Applications
Bubble alumina is a high-performance lightweight insulating refractory aggregate engineered for lightweight insulating castable, lightweight insulating brick, high temperature furnace back-up lining, and petrochemical reformer insulation service. Also known as alumina hollow sphere or alumina bubbles, this product is manufactured by Zhengzhou caihua from high purity Al2O3 raw material through high temperature melting and atomization process. The product family features high alumina purity 99 percent, hollow sphere structure, low bulk density 0.4-1 g/cm3, and high temperature resistance up to 1825 °C, with stable quality and good engineering performance across the global refractory raw material value chain.
Application Industry: Refractory Raw Materials, Lightweight Insulating Refractories, and High Temperature Industrial Furnace Insulation.
Target Equipment: Lightweight Insulating Castable, Lightweight Insulating Brick, High Temperature Furnace Back-up Lining, Petrochemical Reformer, Hydrogen Furnace, and Carbon Black Reactor of small, medium-size, and large refractory manufacturing operations across the global refractory raw material value chain.
Specific Application Zones: The High purity grade is engineered for high purity atmosphere industrial furnace insulation service with Al2O3 content minimum 99 percent, SiO2 content maximum 0.2 percent, Fe2O3 content maximum 0.1 percent, and Na2O content maximum 0.3 percent, with Stacking density 0.4-1 g/cm3, Rate of reduction maximum 15 percent, and Size 0-7 mm. The High strength grade is engineered for higher mechanical strength high temperature refractory service with Al2O3 content minimum 98.5 percent, SiO2 content maximum 1 percent, Fe2O3 content maximum 0.08 percent, and Na2O content maximum 0.25 percent, with Stacking density 0.4-1 g/cm3, Rate of reduction maximum 15 percent, and Size 0-7 mm. Both grades deliver lightweight insulating castable, lightweight insulating brick, high temperature furnace back-up lining, and petrochemical reformer insulation service, with stable quality and good engineering performance across the global refractory raw material value chain.
CH Refractories is a Bubble alumina manufacturer in China, Henan, Zhengzhou. The complete Bubble alumina product family is manufactured in our Xinmi City, Zhengzhou, Henan, China facility to ASTM, GB/T, and ISO refractory raw material standards. Each batch is supported by free consultation, on-site technical support, and a dedicated engineering team serving Refractory Raw Materials customers across the global refractory raw material value chain.
