Mullite Refractory Bricks
Mullite bricks are a high alumina refractory material with mullite (3Al2O3-2SiO2) as the main crystalline phase. The general alumina content is between 65% y 75%.
Mineral composition in addition to mullite, which contains low alumina also contains a small amount of glass phase and square quartz.
The higher alumina content also contains a small amount of corundum.
It is mainly used in hot blast furnace roofs, blast furnace body and bottom, glass kiln heat storage chamber, ceramic sintering kiln, dead-end furnace lining of petroleum cracking system, etc..
PER refractario, como profesional ladrillos refractarios (ladrillos de mullita) fabricante en China, puede ofrecerle un precio más bajo que el mercado. Contact us now to get the latest price list of mullite refractory bricks.
More Mullite Bricks Types
Ladrillos de corindón y mullita
Los ladrillos de corindón y mullita son productos refractarios hechos de materias primas de alta pureza o más puras..
La presencia de impurezas de óxido de bajo punto de fusión reducirá su rendimiento a alta temperatura..
El componente principal de los ladrillos de corindón y mullita es la alúmina..
La principal materia prima es corindón y mullita de alta pureza., Ladrillos refractarios de alúmina compuestos de corindón y fase cristalina principal de mullita.
Tiene buena resistencia a altas temperaturas., resistencia a la fluencia a alta temperatura, resistencia al choque térmico, y resistencia a la erosión.
Adecuado para tazas de cerámica de alto horno., y salida de aire caliente del alto horno.
Lightweight Mullite Bricks
Light mullite brick is a high alumina refractory with mullite as the main crystalline phase.
The general alumina content is between 65% y 75%.
Light mullite bricks are light in quality and good in heat preservation and are high-quality high purity refractory powders.
Lightweight mullite bricks are made of imported slab corundum and high purity electrofused corundum as the main raw materials, applying advanced ultra-micro powder adding technology, after mixing, el secado, moldura, and firing in a high-temperature shuttle kiln.
Mullite lightweight bricks are widely used in residue oil gasification furnaces, ammonia second stage conversion furnaces, carbon black reaction furnaces, refractory kilns, and other equipment.
Low Creep Mullite Bricks
It is made by adding other beneficial auxiliary minerals to the production process of ordinary high alumina bricks to improve the creep resistance.
With the development of large volume, alta temperatura del viento, and long life of ironmaking blast furnaces, the proportion of low creep high alumina bricks for hot blast furnaces is increasing.
Low creep mullite brick This series of products are made of synthetic mullite as the main raw material and formed by high pressure. High-temperature firing, with high strength.
Volume stability under high-temperature conditions creeps rate is small and other advantages.
It is suitable for the supporting hot blast furnace of large and medium-sized blast furnaces.
Zirconium Mullite Brick
Zirconium mullite bricks are made of Al2O3, a part of smooth zirconium dioxide and zirconium corundum cement clinker as raw materials, which are mixed with rubber, conformado, seco, and fired at high temperature in a shuttle kiln.
The zirconium brick crafts have a high-density molecular structure, high volume relative density, and large capacity.
It has high impact toughness at room temperature and high temperature, good thermal shock reliability, and small stress relaxation at high temperature and refired.
Al mismo tiempo, it has the characteristics of high organic chemical reliability and anti-corrosion of partial alkali substances.
Zirconium-containing bricks are key used in large and medium-sized laminated glass kiln melt pools, picture tube kiln, heat storage room partition wall bricks and its chemical plants, metallurgical industry industrial kilns corroded by aqueous solution location.
Mullite Bricks Specification
los refractories of mullite brick are high up to 1790 ℃ o más. Load softening start temperature 1600 ~ 1700 ℃. Normal temperature compressive strength 70~260MPa. y buena resistencia al choque térmico. There are two kinds of sintered mullite bricks and electrofused mullite bricks.
| 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℃ |
Chemical Properties Of Mullite Refractory Bricks
1. Fusión térmica baja, due to the low thermal conductivity, mullite series lightweight thermal insulation bricks accumulate little thermal energy and save energy significantly in intermittent operation.
2. Baja conductividad térmica, with very good thermal insulation and heat preservation effect.
3. Low impurity content with very low content of iron box alkali metal and other oxides, por lo tanto, refractarios altos; high aluminum content makes it maintain good performance under reducing atmosphere.
4. Alta resistencia a la compresión en estado caliente.
5. Can be processed into special shapes to reduce the number of bricklaying blocks and joints.
6. Apariencia y tamaño precisos, speed up the masonry, reduce the use of refractory clay, and ensure the strength and stability of the masonry, alargando así la vida útil del revestimiento..
Zhengzhou PRE Refractories Co., Limitado. produces and sells various types of refractory materials. If you require lightweight mullite bricks, welcome to consult. Our experienced technical staff will provide you with reasonable purchasing solutions. We are looking forward to cooperating with you.
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 refractarios de arcilla, 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.
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.
