Корунд муллит тоосго
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, өндөр температурт тэсвэртэй, 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, дулааны цохилтын эсэргүүцэл, and erosion resistance.
Typical physical and chemical properties of corundum-mullite bricks are Al2O3>85%, Fe2O3 0.45%, apparent porosity 19%, room temperature compressive strength greater than 55MPa loaded softening temperature greater than 1700 ℃, heating line change (1600 ℃, 3h) -0.1%, дулааны цохилтын эсэргүүцэл (1100 ℃ water-cooled) greater than 30 удаа.
| Item/Index | Муллит тоосго | 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% |
| Илэрхий нүхжилт | ≤17% | ≤14% | ≤19% | ≤18% |
| Их хэмжээний нягтралтай | ≥2.55g/cm | ≥2.65g/cm | ≥2.70g/cm | ≥2.90g/cm |
| Хүйтэн бутлах хүч | ≥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. Өндөр температурт тэсвэртэй, high refractory temperature, өндөр ачаалал зөөлрүүлэх температур.
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, гэх мэт. Not easy to flake, өндөр температурт тэсвэртэй, 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 керамик, 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, шахалтын өндөр бат бэх, 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, шахалтын өндөр бат бэх, элэгдэлд тэсвэртэй, earthquake resistance, oxidation resistance, high service temperature, дулаан дамжуулалт багатай.
3. Corundum mullite bricks and mullite refractory bricks have the advantages of high load softening temperature, low creep rate at high temperatures, дулааны цохилтод сайн тэсвэртэй, гэх мэт. Нэмж хэлэхэд, 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, шил хайлуулах зуух, dry quenching coke, and heating furnace. Corundum mullite bricks are easily corroded by alkali refractory bricks at high temperatures.
PER Refractories компанийн тухай
PER Refractories компани Шинми хотод байрладаг, Хэнань муж, Хятад дахь галд тэсвэртэй материалын өлгий нутаг. Our company is a technology-based stubborn enterprise integrating R&Д, үйлдвэрлэл, борлуулалт, техникийн үйлчилгээ. Нутаг дэвсгэрийн баялаг нөөц, маш сайн чанар нь галд тэсвэртэй материал үйлдвэрлэх хосгүй сайн нөхцлийг бүрдүүлдэг.. Манай гол бүтээгдэхүүн бол галд тэсвэртэй шавар тоосго юм, өндөр хөнгөн цагааны исэлд тэсвэртэй тоосго, галд тэсвэртэй цахиурт тоосго, магнийн галд тэсвэртэй тоосго, муллит тоосго, тусгаарлагч тоосго, болон бусад өндөр температурт тэсвэртэй бүтээгдэхүүн.
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