描述
Introduction to 99% Alumina Packing Ball
99% alumina packing ball is a high-performance ceramic product with exceptional properties, making it widely used in various industrial applications. It is composed of 99+% alpha alumina and a maximum 0.2wt% SiO2, which contributes to its excellent performance in high-temperature, chemical, and other demanding environments.
Chemical Composition and Technical Parameters
Chemical Composition
The chemical composition of 99% alumina packing ball is mainly high-purity alpha alumina. The minimum content of Al₂O₃ is 99.6%, and the usual content is 99.3%. Other components such as Fe₂O₃, TiO₂, and Na₂O have very low maximum contents, with Fe₂O₃ ≤ 0.02%, TiO₂ ≤ 0.05%, and Na₂O ≤ 0.13%.
Physical Properties
| Index | Value |
|---|---|
| Apparent Porosity by Weight | ≤7.0% |
| Moh’s Hardness Scale | 8.0 |
| Water Absorption | 4.0wt.% |
| Acid Resistance | 0.7 – 0.8w/m².k |
| Thermal Expansion @500℃ | 0.10% |
| Thermal Shock Stability (1000℃ then water cooling) | 10 times |
| Max. Operating Temperature | 1550℃ |
| Bulk Density (Packing Density) | 2.1g/cm³ |
Key Features and Advantages
- High Temperature Resistance: With a maximum operating temperature of 1550℃. It can withstand extreme high-temperature environments, making it suitable for applications such as secondary reformers in ammonia processing.
- Excellent Thermal Properties: It has high density and good heat retention or deceleration media performance, which is beneficial for maintaining stable temperatures in industrial processes.
- Superior Chemical Resistance: Due to its high alumina content and low silica, it has strong resistance to acids, alkalis, and organic substances. This makes it suitable for olefin processes like ethylene dryers where polymerization problems exist.
- Low Silica Content: The maximum SiO₂ content is 0.2wt%, which avoids the problem of leached silica coating downstream equipment or fouling the catalyst bed in high-temperature and steam applications.
Applications
- Ammonia Processing: Used in secondary reformers to resist high temperatures and steam.
- Olefin Processes: Applied in ethylene dryers to prevent polymerization issues.
- Chemical Industry: Serves as inert support media in chemical process plants, such as fertilizer plants and refineries.
- Drying Tower Packing: Can be used as packing in drying towers for various drying processes.
- H₂O₂ Production: Used as an adsorbent in the production of H₂O₂.
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