Corundum-mullite brick
Corundum-mullite bricks are widely used in equipment such as slag-gasification furnaces, second-stage reforming furnaces for ammonia synthesis, carbon black reactors, and refractory kilns.
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Detailed introduction
Product Introduction
Corundum-mullite bricks are made primarily from imported tabular corundum and high-purity electrofused corundum, utilizing advanced ultrafine powder addition technology. The raw materials are mixed, dried, and formed into blanks, then fired in a high-temperature shuttle kiln. These bricks are composed of high-purity refractory powders that meet stringent quality standards. Based on the specific density requirements of the product, organic composite fillers are added, and the mixture is then shaped via vacuum extrusion before being sintered at high temperatures to produce lightweight mullite products. Corundum-mullite bricks are widely used in equipment such as slag-gasification furnaces, second-stage conversion furnaces for ammonia synthesis, carbon black reactors, and various refractory kilns.
Product Features
1. Low thermal conductivity, low heat capacity
2. High purity, low impurity content
3. High temperature resistance and capable of direct contact with flames
4. High strength and excellent thermal shock resistance.
5. Size—can be cut arbitrarily
Product Applications
Suitable for thermal lining and backing of various industrial furnaces in industries such as metallurgy, petrochemicals, building materials, ceramics, and machinery—including cracking furnaces, reforming furnaces, heating units, refining units, regenerative units, hot-air furnaces, heating furnaces, soaking furnaces, heat-treatment furnaces, resistance furnaces, tunnel kilns, roller hearth kilns, shuttle kilns, bell-type kilns, glass tank furnaces, and more.
Product Parameters
| Project\Name | Unit | Mullite brick 70 | Re-sintered electrofused mullite bricks 75 | Mullite brick 80 | Corundum-mullite 90 |
| Al₂O₃ | % | ≥70 | ≥75 | ≥80 | ≥90 |
| SiO₂ | % | ≤25 | ≤23 | ≤18 | ≤8 |
| Fe₂O₃ | % | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.3 |
| Apparent porosity | % | ≤17 | ≤14 | ≤19 | ≤18 |
| Volumetric density | g/cm³ | ≥2.55 | ≥2.65 | ≥2.70 | ≥2.90 |
| Start softening at (0.2 MPa, 0.6%) | Mpa | ≥90 | ≥100 | ≥80 | ≥100 |
| Room-temperature compressive strength | Celsius | ≥1630 | ≥1700 | ≥1650 | ≥1700 |
| Use | Brickwork at the upper part of glass melting furnaces, brickwork for feeder channels, cover plates, and linings for medium-temperature kilns used in metallurgy and other industrial applications; as well as linings for the quenching and residence sections of carbon black reaction furnaces. | Crown arches and springer bricks at the upper part of glass melting furnaces, as well as linings for other industrial thermal equipment. | Bricks for the upper structure of glass melting furnaces, feed channel bricks, cover plates, forming components, linings for medium-temperature carbon black reactors, and linings for other thermal processing equipment. | Bricks for the upper structure of glass melting furnaces, bricks for the feeder channels, cover plates, forming components, linings for medium-temperature carbon black reactors, and linings for other thermal processing equipment. |
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Gongyi Jinma Furnace Materials Co., Ltd. is wholeheartedly committed to providing customers with high-quality services and sincerely cooperating with friends from all walks of life to create a bright future together.
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