// SPEC · Monolithic Refractories
Hollow-Sphere Alumina Lightweight Castable (Max 1400°C)
Hollow-sphere alumina lightweight castable, 1.4 g/cm³ density, max 1400°C service. High-temperature backup insulation for blast furnace hot blast stoves, shuttle kilns, and ceramic tunnel kilns.
// Key Features
- Hollow-sphere corundum aggregate delivering high refractoriness at low bulk density
- Excellent load-bearing capacity after high-temperature sintering for structural backup service
- Low thermal mass enabling rapid furnace heat-up and cool-down without thermal damage
- High alumina content ensuring chemical stability in oxidizing and mildly reducing atmospheres
// Technical Specifications
| Cold CCS (MPa) | 10 |
| Water Addition (%) | 28–36 |
| Bulk Density (g/cm³) | 1.4 |
| Max Service Temp (°C) | 1400 |
| Thermal Conductivity (W/m·K) | 0.55 |
// Applications
Blast furnace hot blast stove dome insulating backup layerShuttle kiln crown and sidewall high-temperature insulationCeramic tunnel kiln high-temperature zone insulating monolithicElectric resistance furnace insulating backup liningPusher-type slab reheating furnace insulating backup course
// Quick Specs
Max Temperature1400°C
Thermal Conductivity0.55 W/(m·K) at 1000°C
Density1.4 g/cm³
StandardGB/T 3002
// Get Pricing
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