Mattoni di mullite di corindone
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, resistenza alle alte temperature, and low apparent porosity.
PER Refractories produces both standard-sized refractory bricks and customized-shaped refractory bricks. Alta qualità e prezzo economico sono i nostri vantaggi. 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, resistenza allo shock termico, e resistenza all'erosione.
Typical physical and chemical properties of corundum-mullite bricks are Al2O3>85%, Fe2O3 0.45%, porosità apparente 19%, room temperature compressive strength greater than 55MPa loaded softening temperature greater than 1700 ℃, heating line change (1600 ℃, 3h) -0.1%, resistenza allo shock termico (1100 ℃ water-cooled) greater than 30 volte.
| 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℃ |
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, and other parts. Corundum mullite brick has the following advantages:
1. High-temperature resistance, high refractory temperature, temperatura di rammollimento a carico elevato.
2. Resistant to chemical erosion, 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, e così via. Not easy to flake, resistenza alle alte temperature, 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 ceramica, 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, high compressive strength, strong resistance to various corrosive gases, good thermal shock stability, excellent thermal conductivity, and wear-resistant.
2. Lightweight materials with uniform internal structure, more suitable price, high compressive strength, resistenza all'erosione, earthquake resistance, oxidation resistance, high service temperature, e bassa conducibilità termica.
3. Corundum mullite bricks and mullite refractory bricks have the advantages of high load softening temperature, low creep rate at high temperatures, buona resistenza agli shock termici, eccetera. Inoltre, at high temperatures, 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, forni per la fusione del vetro, dry quenching coke, and heating furnace. Corundum mullite bricks are easily corroded by alkali refractory bricks at high temperatures.
Informazioni su PER Refractories Company
PER Società di refrattari si trova nella città di Xinmi, Provincia di Henan, la città natale di materiali refrattari in Cina. Our company is a technology-based stubborn enterprise integrating R&D, produzione, saldi, e servizio tecnico. Le ricche risorse e l’eccellente qualità del territorio forniscono condizioni superiori senza precedenti 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.
PER considera la cosa più importante, crediamo nel prendere sul serio ogni prodotto e nel ricevere sinceramente ogni cliente. Fornire risultati rapidi e di alta qualità a tutti i nostri clienti. PER Refractories sarà il produttore di refrattari più affidabile e il partner affidabile.
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.
