Ladrillos de corindón y mullita
Corundum-mullite bricks are high alumina refractory products consisting of corundum and mullite main crystalline phases. PER’s corundum-mullite bricks have excellent creep resistance, resistencia a altas temperaturas, and low apparent porosity.
PER Refractories produces both standard-sized refractory bricks and customized-shaped refractory bricks. High quality and cheap price are our advantages. You can always contact us for a free quote.
Parameters of Corundum Mullite Bricks
Corundum-mullite bricks have good high-temperature strength, high-temperature creep resistance, resistencia al choque térmico, y resistencia a la erosión.
Typical physical and chemical properties of corundum-mullite bricks are Al2O3>85%, Fe2O3 0.45%, porosidad aparente 19%, room temperature compressive strength greater than 55MPa loaded softening temperature greater than 1700 ℃, heating line change (1600 ℃, 3h) -0.1%, resistencia al choque térmico (1100 ℃ water-cooled) greater than 30 veces.
| Item/Index | Ladrillos de mullita | Resintering Fused Mullite Bricks | Mullite-Corundum Bricks | Corundum-Mullite Bricks |
| Al2O3 | ≥70% | ≥75% | ≥80% | ≥90% |
| SiO2 | ≤25% | ≤23% | ≤18% | ≤8% |
| Fe2O3 | ≤0.5% | ≤0.5% | ≤0.5% | ≤0.3% |
| Porosidad aparente | ≤17% | ≤14% | ≤19% | ≤18% |
| Densidad a Granel | ≥2.55g/cm | ≥2.65g/cm | ≥2.70g/cm | ≥2.90g/cm |
| Fuerza de aplastamiento en frío | ≥90MPa | ≥100MPa | ≥80MPa | ≥100MPa |
| Initial Refractoriness Under Load | ≥1630℃ | ≥1700℃ | ≥1650℃ | ≥1700℃ |
Advantages of Corundum Mullite Bricks Produced by PER
Corundum Mullite Brick is a kind of high-grade refractory material, mainly used in the high-temperature area of ultra-high temperature tunnel kilns, such as furnace walls, furnace roofs, kiln cars, y otras partes. Corundum mullite brick has the following advantages:
1. High-temperature resistance, high refractory temperature, alta temperatura de ablandamiento de carga.
2. Resistente a la erosión química, strong resistance to acidic solution and slag.
3. Oxidation resistance. O2, H2, CO, and other gases are not easy to chemical reaction.
4. Good thermal stability, estabilidad del volumen a alta temperatura, not easy to expand and contract.
5. Resistant to thermal shock, rapid cooling, and heating, not easy to peel off.
6. High compressive strength at room temperature, not easy to wear out when handling and unloading.
What is The Use of Corundum-Mullite Bricks?
1. Corundum-mullite bricks are in direct contact with flame. It can be mainly used in the petrochemical industry, large and medium-sized ammonia gasifiers and magnetic material gasifier materials, high-temperature industrial kiln supporting facilities materials, y así. Not easy to flake, resistencia a altas temperaturas, can be adapted to a variety of environmental conditions of high-temperature kiln use. It can be used in high-temperature kilns under various environmental conditions. It can be used as the working layer of high-temperature kilns for other industrial applications.
2. Corundum-mullite bricks are widely used in zirconia cerámica, fluorescent materials, electronic ceramics, magnetic materials, ceramic powder high-temperature sintering and petrochemical industry gasifier, ammonia two-stage conversion furnace, carbon black reactors, glass industry high-temperature kiln equipment.
Corundum Brick Production Technology
Corundum mullite bricks are usually manufactured using synthetic mullite. The aggregate and powder are added to the batch in a certain proportion and particle size at an inclined angle, and the sulfite pulp waste liquid is used as the binder, which is added in a certain order and stirred well. Molding with a friction brick machine or liquid pressure brick machine also can use mullite particles as aggregate and – Al2O3 powder as powder, or corundum particles electrofused or sintered as aggregate and synthetic mullite powder as powder. The bricks are dried and fired at 1650 ~1750.
What are The Properties of Corundum Mullite Bricks?
1. Heavy material has good densification, alta resistencia a la compresión, strong resistance to various corrosive gases, buena estabilidad frente al choque térmico, excellent thermal conductivity, and wear-resistant.
2. Lightweight materials with uniform internal structure, more suitable price, alta resistencia a la compresión, resistencia a la erosión, earthquake resistance, oxidation resistance, high service temperature, y baja conductividad térmica.
3. Corundum mullite bricks and mullite refractory bricks have the advantages of high load softening temperature, low creep rate at high temperatures, buena resistencia al choque térmico, etc.. Además, a altas temperaturas, mullite can react with water vapor to generate Al2O3 and damage, which is widely used in industrial furnaces and kilns such as blast furnaces hot air furnaces, glass melting kilns, dry quenching coke, and heating furnace. Corundum mullite bricks are easily corroded by alkali refractory bricks at high temperatures.
Acerca de la compañía de refractarios PER
Empresa de refractarios PER se encuentra en la ciudad de Xinmi, Provincia de Henan, la ciudad natal de los materiales refractarios en China. Our company is a technology-based stubborn enterprise integrating R&D, producción, Ventas, y servicio tecnico. Los ricos recursos del territorio y su excelente calidad brindan condiciones superiores incomparables para la producción de materiales refractarios.. Nuestros principales productos son ladrillos de arcilla refractaria, ladrillos refractarios con alto contenido de alúmina, ladrillos refractarios de sílice, ladrillos refractarios de magnesio, ladrillos de mullita, ladrillos aislantes, y otros productos resistentes a altas temperaturas.
PER considera lo más importante, creemos en tomar cada producto en serio y recibir a cada cliente con sinceridad. Proporcionar resultados rápidos y de alta calidad para todos nuestros clientes.. PER Refractories será su fabricante de refractarios más confiable y su socio confiable.
Empresa PER refractario es la base de producción de verde, el ahorro de energía, y nuevos materiales refractarios respetuosos con el medio ambiente. Nuestra empresa ha pasado ISO9001:2008 certificación del sistema de calidad internacional y GB/T24001-2004 / ISO14001:2004 certificación del sistema de gestión ambiental, certificación de la agencia de inspección de calidad empresarial. Nuestros productos se venden bien en más de 20 países de todo el mundo. Son los productos refractarios preferidos para la metalurgia, no ferroso, petroquímico, vidrio, cerámica, y otras industrias refractarias.
