Briques de mullite de corindon
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, résistance aux hautes températures, 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, résistance aux chocs thermiques, et résistance à l'érosion.
Typical physical and chemical properties of corundum-mullite bricks are Al2O3>85%, Fe2O3 0.45%, porosité apparente 19%, room temperature compressive strength greater than 55MPa loaded softening temperature greater than 1700 ℃, heating line change (1600 ℃, 3h) -0.1%, résistance aux chocs thermiques (1100 ℃ water-cooled) greater than 30 fois.
| Article/Index | Briques de mullite | Briques de mullite fondue réintéressées | Briques de mullite-corindon | Briques de corindon-mullite |
| Al2O3 | ≥70% | ≥75% | ≥80% | ≥90 % |
| SiO2 | ≤25% | ≤23% | ≤18% | ≤8% |
| Fe2O3 | ≤0,5% | ≤0,5% | ≤0,5% | ≤0,3% |
| Porosité apparente | ≤17% | ≤14% | ≤19% | ≤18% |
| Densité apparente | ≥2,55 g/cm | ≥2,65 g/cm | ≥2,70 g/cm | ≥2,90 g/cm |
| Résistance à l'écrasement à froid | ≥90MPa | ≥100MPa | ≥80MPa | ≥100MPa |
| Caractère réfractaire initial sous charge | ≥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, et d'autres pièces. Corundum mullite brick has the following advantages:
1. Résistance aux hautes températures, high refractory temperature, température de ramollissement sous charge élevée.
2. Résistant à l'érosion chimique, 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, high-temperature volume stability, 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, et ainsi de suite. Not easy to flake, résistance aux hautes températures, 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 céramique, 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, haute résistance à la compression, strong resistance to various corrosive gases, bonne stabilité aux chocs thermiques, excellent thermal conductivity, and wear-resistant.
2. Lightweight materials with uniform internal structure, more suitable price, haute résistance à la compression, résistance à l'érosion, earthquake resistance, oxidation resistance, high service temperature, et faible conductivité thermique.
3. Corundum mullite bricks and mullite refractory bricks have the advantages of high load softening temperature, low creep rate at high temperatures, bonne résistance aux chocs thermiques, etc. en plus, à haute température, 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, fours de fusion de verre, dry quenching coke, and heating furnace. Corundum mullite bricks are easily corroded by alkali refractory bricks at high temperatures.
À propos de la société PER Refractories
Société des Réfractaires PER est situé dans la ville de Xinmi, Province du Henan, la patrie des matériaux réfractaires en Chine. Our company is a technology-based stubborn enterprise integrating R&ré, production, Ventes, et service technique. La richesse des ressources et l'excellente qualité du territoire offrent des conditions supérieures inégalées pour la production de matériaux réfractaires. Nos principaux produits sont des briques d'argile réfractaire, briques réfractaires à haute teneur en alumine, briques de silice réfractaire, briques réfractaires au magnésium, briques de mullite, briques isolantes, et autres produits résistants aux hautes températures.
PER considère la chose la plus importante, nous croyons qu'il faut prendre chaque produit au sérieux et recevoir chaque client sincèrement. Fournir des résultats rapides et de haute qualité à tous nos clients. PER Refractories sera votre fabricant de réfractaires le plus digne de confiance et votre partenaire fiable.
La société PER réfractaire est la base de production du vert, économie d'énergie, et de nouveaux matériaux réfractaires respectueux de l'environnement. Notre société a passé ISO9001:2008 certification internationale du système de qualité et GB/T24001-2004 / ISO14001:2004 certification du système de management environnemental, certification de l'agence d'inspection de la qualité de l'entreprise. Nos produits se vendent bien dans plus de 20 pays du monde entier. Ce sont les produits réfractaires de prédilection pour la métallurgie, non ferreux, pétrochimique, verre, céramique, et autres industries réfractaires.
