Refractory Artificial Corundum Tabular Alumina
Refractory Artificial Corundum Tabular Alumina
Refractory Artificial Corundum Tabular Alumina
Refractory Artificial Corundum Tabular Alumina
Refractory Artificial Corundum Tabular Alumina
Refractory Artificial Corundum Tabular Alumina
Refractory Artificial Corundum Tabular Alumina
Refractory Artificial Corundum Tabular Alumina
Description
Technical Parameters
Products Description
Refractory artificial corundum tabular alumina is formed by homogenizing high-purity alumina powder raw materials and shaping them into green bodies through dry pressing or isostatic pressing to ensure uniform density. Rapid high-temperature sintering at 1900 ° C to 2000 ° C in a tunnel kiln. During this process, no sintering aids are added to avoid introducing impurities and maintain the inherent high temperature resistance of the material. Rapid sintering promotes the growth of large and well-developed hexagonal plate-like crystals, while closed spherical pores are formed inside the crystals during recrystallization. Finally, the sintered blocks undergo crushing, screening, and grading to obtain standardized particle sizes, ensuring consistent quality of each batch of products.
Introduction
Tabular Alumina is a pure sintered alpha-alumina material that has been fully densified by rapid-sintering without the use of sintering aids at temperatures in excess of 1900°C.
Tabular Alumina has characteristic large, well developed hexagonal tablet shaped alpha-alumina crystals. The excellent thermal volume stability and thermal shock characteristics can be attributed to its specific microstructure: low open porosity and large crystals with closed spherical pores,which are entrapped upon re-crystallization during rapid sintering.
Advantages
1. Excellent high temperature stability and thermal shock resistance
The melting point of refractory artificial corundum plate-like alumina is 2040 ° C, and it maintains a stable physical structure at temperatures up to 1600 ° C. Its unique plate-like crystal structure and low porosity minimize volume shrinkage under long-term high temperature exposure. Unlike ordinary refractory materials that crack or peel off under rapid temperature fluctuations, it can withstand repeated heating and cooling cycles, reducing unexpected downtime in kilns.
2. Excellent chemical corrosion resistance
This material has ultra-high purity and low impurity content, and can resist corrosion from most slag, acids, and alkalis (except hydrofluoric acid and phosphoric acid). Its dense crystal structure can prevent slag infiltration, which is a common cause of failure in refractory linings in the steel and cement industries. In the areas of steelmaking ladles and cement kiln burners, it effectively prevents the erosion of molten steel, slag, and alkaline gases. Compared with ordinary alumina refractory materials, the service life of refractory lining is extended by 30-50%.
3. High mechanical strength and wear resistance
The Mohs hardness is 9, with a high packing density and excellent wear resistance and impact resistance. The interwoven plate-like crystals enhance the bonding strength of the refractory mixture, ensuring structural integrity under heavy mechanical loads. Whether used as a refractory lining in high wear areas or as a grinding medium for high hardness materials, it can maintain stable performance without excessive wear or fracture, thereby reducing replacement frequency and long-term costs.
Applications
1. Steel and metallurgical industry
In steelmaking, it is a key raw material for ladle lining, intermediate ladle refractory materials, and sliding door panels. It resists the erosion of molten steel and high-temperature slag, which is crucial for continuous steel production. In non-ferrous metallurgy, it is used as a lining for aluminum smelting furnaces, which can withstand corrosive molten aluminum and extreme high temperatures, ensuring stable operation of the furnace.
2. Cement and glass industry
The burner area, outlet lining, and preheater components of the cement kiln all rely on it, where refractory artificial corundum tabular alumina can resist alkali corrosion and thermal cycling. In glass manufacturing, it is used to melt tank liners and regenerator refractory materials, maintain glass purity, and resist corrosion of molten glass at 1500 ° C. Its low thermal conductivity also reduces the energy consumption of these energy intensive processes.
3. Petrochemical and waste incineration industry
In petrochemical reactors and high-temperature furnaces, it resists corrosion from acidic and alkaline gases at high temperatures. For garbage incinerators, they can withstand high temperatures and corrosive fumes, prevent lining damage, and ensure safe and efficient garbage disposal. It can also serve as a high-performance catalyst carrier, utilizing its stable structure and high temperature resistance.
4. Advanced ceramic and refractory products
As a raw material for high-end ceramics, it produces kiln furniture (rollers, crucibles), ceramic crucibles, and electrical insulators, enhancing thermal shock resistance and deformation resistance. In the overall refractory material, it is added to low cement castables and refractory mortar to improve the strength and durability of complex shaped refractory components.
Composition Type
|
CompositionType |
Al2O3% |
SiO2% |
Na2O% |
Fe2O3% |
Bulk density (g\cm3) |
Porosity% |
Moisture% |
|
MA-35 |
≥99.2 |
≤0.20 |
≤0.40 |
≤0.10 |
≥3.50 |
≤5.0 |
≤1.50 |
|
Typical value |
99.5 |
0.1 |
0.36 |
0.08 |
3.55 |
3.6 |
1 |
Basic Information
|
Model No |
ZBHA |
|
Bulk density |
3.5kg/cm³ |
|
Moisure |
1.5% |
|
Specification |
5-8/10mm, 3-5/6mm ,1-3mm, 0-1mm ,325mesh |
|
Origin |
China |
|
Production capacity |
15000 tons |
|
Color |
White/Brown |
|
Porosity |
5% |
|
Transport Package |
Jumbo bag |
|
Trade Mark |
HUAO |
|
HS code |
281810900 |
Why choose Huao's Refractory Artificial Corundum Tabular Alumina?
1. Strict quality control and international certification
We conduct a full process quality inspection for each batch of products. From raw material procurement to finished product delivery, every step undergoes rigorous testing, including chemical composition analysis, physical property testing, and microstructure observation.
2. Customization for unique industrial needs
We tailor refractory material solutions according to the needs of different industries and working conditions. Our technical team works closely with customers to customize particle size, purity grade, and formula.
3. Stable production capacity and global supply
With an annual production base of 15000 tons, we have maintained sufficient inventory for small trial orders and bulk industrial orders. Our advanced production equipment and standardized management ensure a stable delivery cycle. We support flexible packaging options: small orders use 25kg moisture-proof bags, and sea freight uses 1MT packaging bags to prevent damage during long-distance transportation. Our global logistics network enables timely delivery to over 30 countries and regions.
4. Professional technical support and after-sales service
In addition to product supply, we also provide end-to-end technical support. We help customers solve common pain points such as thermal shock cracking and slag infiltration, optimize refractory system performance, and reduce operating costs. Our after-sales team responds to inquiries within 24 hours, resolves product usage issues, and provides timely solutions.
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