Home > Medium Alumina Ceramic Balls
Medium alumina ceramic balls are dense, corrosion-resistant alumina spheres that work as packing and catalyst support media in reactors, towers and columns. With a medium alumina content, they balance strength, chemical resistance and cost, and hold up under load, heat and corrosive media without taking part in the reaction.
| Property | Value |
|---|---|
| Material | Medium-Alumina Ceramic (Al2O3) |
| Al2O3 Content | 40–75% |
| Al2O3 + SiO2 | >93% |
| Fe2O3 | <1% |
| Water Absorption | <1% |
| Grain Density | 2.6–2.9 g/cm³ |
| Max Operating Temperature | 1450°C |
| Hardness | >7 Mohs |
| Compressive Strength (kN/particle) | Φ6 >0.50, Φ25 >4.9, Φ38 >5.5, Φ50 >6.5 |
| Type | Random packing / catalyst support media |
| Sizes | Φ6, 25, 38, 50 mm (other sizes on request) |
| Certification | ISO 9001 |
| Trademark | RONGJIAN |
| Origin | Jiangxi, China |
| HS Code | 690919000 |
| Transport Package | Carton box / ton bag |
Medium alumina ceramic balls are used as packing and catalyst support media in reactors, towers and columns. They sit in or under the bed, carry the load, spread the gas or liquid, and hold the catalyst or packing in place, staying inert through the process. The medium grade suits duties where full high-alumina strength is not needed and cost matters.
The medium-alumina grade runs at roughly 40 to 75 percent Al2O3, between the low-alumina support grades and the high-alumina and 99 percent grades. That content gives a good balance of crush strength, chemical and thermal resistance and price, which is why it is a common choice for general packing and support duty.
The balls are made in the standard packing diameters — Φ6, 25, 38 and 50 millimetres — with other sizes to order. Larger balls go lower in a bed and smaller ones higher, and we pick the diameters for the vessel and the packing they carry.
How much you order sets the price break, and standard grades ship quickly. Bulk travels by the tonne in cartons or ton bags, washed and dried before packing. Give us the diameters and the tonnage and we will quote it.
Medium alumina ceramic balls sit between the low-alumina support grades and the high-alumina grades. At around 40–75% Al2O3 they carry a good crush strength and take temperatures up to about 1450°C, while costing less than the high grades, which makes them a practical choice for general catalyst support and tower packing. They come washed and dried, in the Φ6 to Φ50 mm range, and go into the bed ready to use.
