Korundaj Mullite Brikoj
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, rezisto al alta temperaturo, 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, thermal shock resistance, kaj eroziorezisto.
Typical physical and chemical properties of corundum-mullite bricks are Al2O3>85%, Fe2O3 0.45%, ŝajna poreco 19%, room temperature compressive strength greater than 55MPa loaded softening temperature greater than 1700 ℃, heating line change (1600 ℃, 3h) -0.1%, thermal shock resistance (1100 ℃ water-cooled) greater than 30 fojojn.
| Item/Index | Mullite Brikoj | 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% |
| Ŝajna Poreco | ≤17% | ≤14% | ≤19% | ≤18% |
| Bulk Density | ≥2.55g/cm | ≥2.65g/cm | ≥2.70g/cm | ≥2.90g/cm |
| Cold Crushing Strength | ≥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, kaj aliaj partoj. Corundum mullite brick has the following advantages:
1. High-temperature resistance, high refractory temperature, alta ŝarĝo mildiga temperaturo.
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, stabileco de volumo de alta temperaturo, 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, and so on. Not easy to flake, rezisto al alta temperaturo, 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 ceramiko, 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, erosion resistance, earthquake resistance, oxidation resistance, high service temperature, and low thermal conductivity.
3. Corundum mullite bricks and mullite refractory bricks have the advantages of high load softening temperature, malalta rampa indico ĉe altaj temperaturoj, bona termika ŝoko rezisto, ktp. Krome, 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, glass melting kilns, dry quenching coke, and heating furnace. Corundum mullite bricks are easily corroded by alkali refractory bricks at high temperatures.
Pri PER Refractories Company
PER Refractories Company situas en la urbo Xinmi, Henan Provinco, la hejmurbo de obstinaj materialoj en Ĉinio. Our company is a technology-based stubborn enterprise integrating R&D, produktado, vendoj, kaj teknika servo. The territory’s rich resources and excellent quality provide unparalleled superior conditions for the production of refractory materials. Our main products are refractory clay bricks, altaj aluminaj obstinaj brikoj, obstinaj silikaj brikoj, magneziaj obstinaj brikoj, mulitbrikoj, izolaj brikoj, and other high-temperature-resistant products.
PER considers the most important thing, we believe in taking every product seriously and receiving every customer sincerely. To provide fast and high-quality results for all our customers. PER Refractories will be your most trustworthy refractory manufacturer and reliable partner.
Kompanio PER refractario estas la produktada bazo de verda, ŝparado de energio, kaj medio-amikaj novaj obstinaj materialoj. Nia kompanio pasis ISO9001:2008 internacia kvalito-sistema atestado kaj GB/T24001-2004 / ISO14001:2004 atestilo pri media administrado, entrepren-kvalita inspekta agenteja atestado. Niaj produktoj estas venditaj bone en pli ol 20 landoj tra la tuta mondo. Ili estas la preferataj obstinaj produktoj por metalurgio, neferaj, petrolkemiaj, vitro, ceramiko, kaj aliaj obstinaj industrioj.
