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High-density inert alumina balls are a type of ceramic balls made from alumina as the main raw material and produced through high-temperature (above 1600℃) sintering. They are characterized by high density and low porosity, and are inert fillers.
Technical Data
| Item | Type 1 | Type2 | |
| AL2O3 | 90% | >99% | |
| Acid resistance | >=98% | ||
| Alkali resistance | >90% | >95% | |
| Thermal shock reistance | >=700 | >=800 | |
| Operation temperature (℃) | 1350 | 1500 | |
| Bulk density(kg.m3) | 1600-1800 | >=1900 | |
| high density inert alumina ball Crushing Strength (N/pellet) |
1/8”(3mm) | >510 | >510 |
| 1/4”(6mm) | >1500 | >1500 | |
| 3/8”(10mm) | >6000 | >6000 | |
| 1/2”(13mm) | >8000 | >8000 | |
| 5/8″(16mm) | >9000 | >9000 | |
| 3/4”(19mm) | >11000 | >11000 | |
| 1”(25mm) | >20000 | >20000 | |
| 1.5″(38mm) | >33000 | >33000 | |
| 2”(50mm) | >150000 | >150000 | |
| 3″(76mm) | >150000 | >150000 | |
Core features
Pure material: The content of alumina is usually ≥ 99%, with extremely low impurity content.
High density: (≥ 3.6g/cm³), dense structure, with almost no open pores.
Excellent mechanical properties: High compressive strength, good wear resistance, and not prone to cracking and generating dust.
Main applications:
- Supporting, covering or isolating catalysts within industrial reactors.
- As fillers in high-pressure, high-flow rate, and highly abrasive conditions (such as in hydrogenation cracking reactors and large-scale catalytic units).
- Preventing catalyst loss and equipment blockage while not participating in chemical reactions.
The differences between high-density inert alumina balls and ordinary inert alumina balls
The differences between high-density inert alumina balls and ordinary inert alumina balls
Density and porosity are different: The density of the high-density type is usually ≥ 3.6g/cm³, with a higher sintering temperature (above 1600℃), and the internal structure is dense with no obvious pores; the density of the ordinary type is mostly in the range of 3.2-3.4g/cm³, with a higher porosity.
Mechanical performance differences: The high-density balls have stronger compressive strength (≥ 120MPa), better wear resistance, and are less likely to crack and produce dust; the ordinary balls have lower compressive strength (≥ 80MPa), and are prone to wear over time.
Application focus: The high-density balls are suitable for high-pressure, high-flow rate, and strong erosion conditions (such as hydrogenation reactors, large-scale catalytic devices); the ordinary balls are used in normal pressure, low-flow rate, and conventional support scenarios (such as ordinary distillation towers, adsorption towers).
Factors affecting service life
Working condition intensity: High pressure, high flow rate, and strong medium erosion scenarios (such as hydrogenation reactors) will accelerate wear and shorten the service life; normal pressure, low flow rate conditions (such as ordinary distillation towers) have a longer service life.
Medium characteristics: Strong corrosive contact, media containing solid particles will increase wear and erosion, shortening the service life; neutral, clean media have a longer service life.
Product quality: High-density inert alumina balls have a longer service life than ordinary models due to their high density and good wear resistance, by 2-3 years; inferior products may crack due to insufficient strength within a short period.
Operation and maintenance: Frequent start-stop and sudden temperature changes will cause thermal shock, which is likely to cause the balls to crack and shorten the service life. — Would you like me to help you prepare a **reference table for the service life of inert alumina balls under different working conditions**, so that you can quickly estimate based on your own scenario?
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