Ladrillos fundidos de mullita fundida
Ladrillos fundidos de mullita fundida are made of high-quality mullite clinker as raw material, which is melted and cast at high temperatures in an electric arc furnace.
The refractory fire bricks are characterized by dense crystal structure, alta temperatura de ablandamiento de carga, buena resistencia al choque térmico, high mechanical strength at room temperature and high temperature, buena resistencia a la abrasión, buena conductividad térmica, and strong resistance to slag corrosion, etc.. The bricks are widely used in metallurgical heating furnaces, incluso calentar hornos, calcium carbide furnaces, and calcium carbide furnaces. Electrofused mullite is widely used in metallurgical heating furnaces, incluso calentar hornos, salidas de horno de carburo de calcio, paredes del horno de vidrio, y así.
PER Refractories produces standard refractory bricks and customized-shaped refractory bricks. High quality and cheap price are our advantages. You can contact us for a free quote in time.
Fused Cast Mullite Bricks Typical Physical Properies
| Al2O3 max (%) | 70-75 |
| SiO2 min (%) | 19-21 |
| Fe2O3 max (%) | 0.9-1.9 |
| Na2O max (%)a | 1.0-1.2 |
| True Specific Gravity | 3.54 g/cm |
| Fuerza de aplastamiento en frío | 350 MPa |
| Thermal Expansion at 1150℃ | 0.80% |
| Thermal Conductivity at 500-1500℃ | 4.6W/m.K |
| Porosidad | 8% |
Composition of Fused Cast Mullite Bricks
Fused mullite generally includes high purity fused mullite and ordinary fused mullite. Compared with sintered fused mullite, fused mullite has coarse crystals of 1000 a 2000. high-purity fused mullite is light gray, and ordinary fused mullite is dark gray (bauxite is the main raw material).
PER refractories factory can customize high purity fused mullite and ordinary fused mullite according to customers’ requirements. We also produce ladrillos de corindón mullita y otra types of refractory bricks.
Fused Cast Mullite Bricks are made of high alumina isotopes, composed of different alumina (3AL203.2Si02 mass fraction of AL2O372% and Si0228%). It is melted at about 2300°C and cast in a sand mold at 1850°C, then annealed to relieve stress.
The main crystalline phase is mullite and corundum, and the glass phase is filled between the crystalline phases. It is more resistant to glass liquid erosion than sintered refractories, but not as good as other electrofused refractories.
Adding a small amount of dioxygen (7%-8.5%) can make mullite crystals smaller, brick organization dense, mullite amount increased to 60%-70%, relatively reduce the glass phase content, reduce product cracks. Fused Cast Mullite Bricks have a low coefficient of thermal expansion, good resistance to thermal vibration, and strong resistance to glass liquid erosion.
Above 1450 ℃, mullite brick should not contact with alkali substances, otherwise it will make mullite decomposition. Mullite will also decompose in the reducing atmosphere above 1370℃, and part of Si02 becomes gaseous SiO to leave the brick body.
When the temperature is higher than 1650°C, even if the atmosphere is not restored, the mullite will decompose at a lower partial pressure of oxygen.
Fused Cast Mullite Bricks are made from high alumina isotopes, and different alumina is formulated to form the composition of mullite (3AL203-2Si02 mass fraction is: AL2O3 72%, Si02 28%). It is melted at about 2300°C, poured into the sand mold at thousand 1850°C, and then annealed to eliminate stress.
The main crystalline phase is mullite and corundum, the glass phase is filled in between the crystalline phase. Its resistance to glass liquid erosion is stronger than sintered refractories, but not as strong as other electrofusion refractories.
Add a small amount (7%-8.5%) of enamel dioxide, which can make the mullite crystals become a smaller, dense brick organization, the amount of mullite increased to 60%-70%, relatively reducing the content of the glass phase, and reduce the cracks of the products.
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. Nuestra empresa es una empresa refractaria basada en tecnología que integra R&D, producción, Ventas, y servicio tecnico. Los ricos recursos y la excelente calidad del territorio brindan condiciones superiores sin precedentes 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.
