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% e 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, eccetera.
PER refrattario, come professionista mattoni refrattari (mattoni di mullite) produttore in Cina, può offrirti un prezzo inferiore rispetto al mercato. Contact us now to get the latest price list of mullite refractory bricks.
More Mullite Bricks Types
Mattoni di mullite di corindone
I mattoni di mullite di corindone sono prodotti refrattari realizzati con materie prime di elevata purezza o più pure.
La presenza di impurità di ossido a basso punto di fusione ridurrà le sue prestazioni ad alta temperatura.
Il componente principale dei mattoni di mullite in corindone è l'allumina.
La materia prima principale è il corindone e la mullite di elevata purezza, mattoni refrattari di allumina composti da corindone e fase cristallina principale di mullite.
Ha una buona resistenza alle alte temperature, resistenza allo scorrimento alle alte temperature, resistenza allo shock termico, e resistenza all'erosione.
Adatto per tazze ceramiche d'altoforno, e uscita aria calda dell'altoforno.
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% e 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, asciugatura, modanatura, 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, high wind temperature, 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, a forma di, essiccato, 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.
Allo stesso tempo, 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
IL refractories of mullite brick are high up to 1790 ℃ or more. Load softening start temperature 1600 ~ 1700 ℃. Normal temperature compressive strength 70~260MPa. e buona resistenza agli shock termici. There are two kinds of sintered mullite bricks and electrofused mullite bricks.
| Item/Index | Mattoni di mullite | 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% |
| Apparent Porosity | ≤17% | ≤14% | ≤19% | ≤18% |
| Bulk Density | ≥2.55g/cm | ≥2.65g/cm | ≥2.70g/cm | ≥2.90g/cm |
| Forza di frantumazione a freddo | ≥90MPa | ≥100MPa | ≥80MPa | ≥100MPa |
| Initial Refractoriness Under Load | ≥1630℃ | ≥1700℃ | ≥1650℃ | ≥1700℃ |
Chemical Properties Of Mullite Refractory Bricks
1. Bassa fusione termica, due to the low thermal conductivity, mullite series lightweight thermal insulation bricks accumulate little thermal energy and save energy significantly in intermittent operation.
2. Bassa conducibilità termica, 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, Perciò, refrattari alti; high aluminum content makes it maintain good performance under reducing atmosphere.
4. Elevata resistenza alla compressione allo stato caldo.
5. Can be processed into special shapes to reduce the number of bricklaying blocks and joints.
6. Aspetto e dimensioni precisi, speed up the masonry, reduce the use of refractory clay, and ensure the strength and stability of the masonry, prolungando così la vita del rivestimento.
Zhengzhou PRE Refractories Co., srl. 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.
Informazioni su PER Refractories Company
PER Azienda refrattari si trova nella città di Xinmi, Provincia di Henan, la città natale di materiali refrattari in Cina. La nostra azienda è un'impresa refrattaria basata sulla tecnologia che integra R&D, produzione, saldi, e servizio tecnico. Le ricche risorse e l'eccellente qualità del territorio forniscono condizioni superiori senza pari per la produzione di materiali refrattari. I nostri prodotti principali sono mattoni di argilla refrattaria, mattoni refrattari ad alto contenuto di allumina, mattoni refrattari di silice, mattoni refrattari al magnesio, mattoni di mullite, mattoni isolanti, e altri prodotti resistenti alle alte temperature.
Azienda PER refrattario è la base di produzione di verde, risparmio energetico, e nuovi materiali refrattari rispettosi dell'ambiente. La nostra azienda ha superato ISO9001:2008 certificazione internazionale del sistema di qualità e GB/T24001-2004 / ISO14001:2004 certificazione del sistema di gestione ambientale, certificazione dell'agenzia di ispezione di qualità aziendale. I nostri prodotti sono venduti bene in più di 20 paesi di tutto il mondo. Sono i prodotti refrattari preferiti per la metallurgia, non ferroso, petrolchimico, bicchiere, ceramica, e altre industrie refrattarie.
