High Alumina Insulation Brick is a lightweight refractory insulation material manufactured from selected high-alumina bauxite, kaolin clay, and other lightweight raw materials. Produced through high-pressure forming and high-temperature sintering, these bricks combine high refractoriness, low bulk density, low thermal conductivity, and sufficient mechanical strength.
Compared with conventional dense refractory bricks, high alumina insulation bricks significantly reduce heat loss and the overall weight of furnace linings. Their excellent thermal insulation performance makes them particularly suitable for furnace walls, roofs, backup insulation layers, and other areas where low heat transfer and reliable high-temperature performance are required.
Physicochemical Parameters
| Items | LG140-1.2 | LG140-1.0 | LG140-0.8 |
|---|---|---|---|
| Al₂O₃ (%) | ≥48 | ≥48 | ≥48 |
| Fe₂O₃ (%) | ≤2 | ≤2 | ≤2 |
| Bulk Density (g/cm³) | ≤1.2 | ≤1.0 | ≤0.8 |
| Cold Crushing Strength (MPa) | ≥4.5 | ≥3.5 | ≥2.5 |
| Refractoriness (°C) | 1400 | 1350 | 1250 |
| Thermal Conductivity (W/m·K) | ≤0.55 | ≤0.50 | ≤0.35 |
| Permanent Linear Change (%) | -2 ~ 1.0 | -2 ~ 1.0 | -2 ~ 1.0 |
| Standard Size (mm) | 230 × 114 × 65 | 230 × 114 × 65 | 230 × 114 × 65 |
Product Features
- High Refractoriness: High alumina content provides reliable performance in high-temperature environments and helps maintain structural stability during prolonged heating.
- Excellent Thermal Insulation: Low thermal conductivity reduces heat transfer through the furnace lining, helping improve thermal efficiency and reduce energy consumption.
- Lightweight Structure: Low bulk density reduces the overall weight of refractory linings and makes transportation, handling, and installation easier.
- Good Mechanical Strength: Despite their lightweight structure, high alumina insulation bricks provide sufficient cold crushing strength for furnace insulation and lining applications.
- Low Heat Storage: The lightweight structure allows the refractory lining to heat up and cool down more efficiently, which can help reduce heat loss during repeated furnace cycles.
- Good Chemical Stability: Alumina-based raw materials provide good resistance to chemical attack in many industrial high-temperature environments.
- Dimensional Stability: Properly manufactured insulation bricks offer stable performance under repeated heating and cooling conditions.
- Customizable Specifications: Different densities, sizes, shapes, and performance grades can be supplied according to specific furnace requirements.
Applications
High Alumina Insulation Bricks are widely used in thermal insulation and lining systems for various high-temperature industrial furnaces, including:
- Steel and Iron Industry: Used in heating furnaces, reheating furnaces, annealing furnaces, and other thermal equipment as insulation layers and furnace linings.
- Cement Industry: Applied to selected areas of cement kilns and other high-temperature equipment where lightweight thermal insulation is required.
- Ceramic Industry: Suitable for ceramic tunnel kilns, roller kilns, shuttle kilns, and other ceramic firing equipment.
- Chemical Industry: Used for thermal insulation in chemical reactors, heating furnaces, decomposition furnaces, and coking equipment.
- Coking Furnaces: Provides thermal insulation and helps reduce heat loss in high-temperature coking operations.
- Power Industry: Used as insulation material in boilers, chimneys, and other high-temperature equipment.
- Industrial Heating Furnaces: Suitable for furnace walls, roofs, backup linings, and thermal protective layers.
High alumina insulation bricks are generally suitable for areas that are not directly exposed to severe mechanical erosion or continuous contact with molten materials. For direct working-face applications, the brick grade should be selected according to the actual operating temperature and furnace conditions.
Customization Services
Xintai Refractory provides high alumina insulation bricks in different densities, dimensions, and shapes according to customer requirements. Standard bricks can be supplied in 230 × 114 × 65 mm, while custom dimensions and special-shaped bricks are available for specific furnace structures.
We can also recommend suitable grades based on:
- Furnace operating temperature
- Required thermal conductivity
- Bulk density requirements
- Mechanical loading conditions
- Furnace structure and installation method
- Required service life
Packing and Shipping Details
- Packing: Export-standard packaging with protective materials to minimize damage during transportation.
- Shipping: Available by sea, air, or road according to order quantity and destination.
- Delivery: Production and delivery schedules can be arranged according to order quantity and customization requirements.
- Customization: Special packaging and loading requirements can be discussed for international orders.
About Xintai Refractory
Xintai Refractory is a professional manufacturer and supplier of high-performance refractory materials for high-temperature industrial applications. With extensive experience in refractory production, Xintai supplies high alumina bricks, high alumina insulation bricks, fireclay bricks, low-creep refractory bricks, anti-stripping high alumina bricks, and other customized refractory products.
We provide reliable refractory solutions for customers in the steel, cement, ceramic, chemical, and other industries. With factory-direct supply, customized specifications, and international delivery capabilities, Xintai Refractory can provide suitable high alumina insulation bricks according to different furnace designs and operating conditions.
Contact Xintai Refractory today for high alumina insulation brick specifications, factory pricing, and customized refractory solutions.
