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| Customization: | Available |
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| Classification: | Clay |
| Feature: | Good Mechanical Strength, Good Thermal Insulation Performance, High-Temperature Resistant, Light Weight, Low Thermal Conductivity, Long Time Material |
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HJM insulating firebrick is manufactured from high grade refractory powder and materials in good purity. During the process of production, some organic and multiple filling materials are added according to the specific requirement proportion. By compressed in vacuum and sintered under high temperature, the brick has typical advantages including low thermal conductivity, good thermal shock resistance, low heat capacity and low iron content as well as outstanding mechanical flexibility which has extensive applications in variety of industrial markets.
Applications Of Insulating Fire Brick
Features
Direct access to fire
Low thermal capacity
Low thermal conductivity
Excellent thermal stability
Excellent thermal resistance
High purity and low iron content
Accurate dimension and easy cutting
| Description | HJM-23 | HJM-26 | HJM-28 | HJM-30 | HJM-32 | ||||
| A | B | C | 26 | 26A | 28 | 28A | |||
| Chemical composition(%) | |||||||||
| AL2O3 | 35 | 37 | 45 | 51 | 56 | 60 | 65 | 71 | 75 |
| SIO2 | 55 | 53 | 49 | 44 | 40 | 36 | 32 | 26 | 23 |
| FE2O3 | 1 | 1 | 0.9 | 0.8 | 0.8 | 0.67 | 0.65 | 0.6 | 0.55 |
| K2O+NA2O | 1.4 | 1.3 | 0.23 | 1.2 | 1.1 | 0.9 | 0.8 | 0.8 | 0.8 |
| Physical properties | |||||||||
| Density(kg/m³) | 480 | 600 | 800 | 800 | 800 | 900 | 900 | 1100 | 1200 |
| Classification temperature(ºC) | 1200 | 1250 | 1300 | 1350 | 1430 | 1490 | 1530 | 1650 | 1730 |
| Cold rushing strength | 1.1 | 1.2 | 2.2 | 2.3 | 2.5 | 2.8 | 2.9 | 3.5 | 4.0 |
| Modulus of ruputre | 0.9 | 1.1 | 1.2 | 1.5 | 1.5 | 1.8 | 1.8 | 2.0 | 2.1 |
| Permanent linear change(%)*24h | 1150-0.5 | 1200-0.3 | 1250-0.2 | 1300-0.4 | 1400-0.4 | 1450-0.9 | 1500-1.0 | 1550-1.1 | 1650±1.1 |
| Thermal Expansion(%) 1000ºC | 0.5 | 0.6 | 0.7 | 0.7 | 0.7 | 0.8 | 0.85 | 0.9 | 1.1 |
| Thermal Conductivity(W/m.k) | |||||||||
| 350ºC | 0.13 | 0.17 | 0.23 | 0.23 | 0.21 | - | - | - | - |
| 400ºC | - | - | - | 0.25 | 0.22 | 0.34 | 0.33 | 0.38 | 0.48 |
| 600ºC | - | - | - | 0.26 | 0.235 | 0.37 | 0.35 | 0.4 | 0.52 |
| 1250ºC | - | - | - | 0.28 | 0.265 | 0.46 | 0.43 | 0.48 | 0.58 |
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