Activated alumina spheres are white spheres with many capillaries and capillary channels. The surfaces of these channels have high activity and can selectively adsorb gases, vapors, and liquid water. Activated alumina has a good removal effect on fluoride ions in water.

Under certain conditions, the drying depth can reach a dew point below -70, and after saturation, it can be heated to remove water and revived at 175-400, which can be carried out multiple times. It can also absorb lubricating oil and other oil vapors from contaminated oxygen, hydrogen, and sulfur dioxide, and can be used as a catalyst or carrier. Widely used in drying equipment such as petrochemicals, refineries, electronics, ethylene, propylene, and air, it has been applied in many hydrogen peroxide plants, fertilizer plants, oxygen plants, and petrochemical refining units, and has achieved good results.

Activated alumina spheres are also determined based on the polarity of the adsorbate. They have strong affinity for water, oxides, acetic acid, alkali, etc. They are a deep desiccant containing trace amounts of water and an adsorbent for polar molecules. The improved adsorbent activated alumina is commonly referred to as "activated alumina" in catalysts. It is a solid material with high porosity and high dispersibility, which has a large specific surface area. Its microporous surface has the characteristics required for catalytic activity such as adsorption, surface activity, and good thermal stability. Therefore, it is widely used as a chemical reaction catalyst and catalyst carrier.

The defluorination of activated alumina balls is similar to that of anion exchange resins, but the selectivity of fluoride ions is greater than that of anion resins. Activated alumina has good adsorption and defluorination effects and stable capacity. Each cubic meter of activated alumina can absorb 6400 grams of fluoride. This product has high strength, wear resistance, no softening, no expansion, no powdering, and no cracking. It can be widely used in the deep drying of petroleum cracking gas, ethylene propylene gas, hydrogen production, air separation units, instrument air dryers, and fluorine-containing wastewater. It can also remove pollutants such as sulfur dioxide, hydrogen, carbon dioxide, hydrogen fluoride, and hydrocarbons from exhaust gas, especially suitable for defluorination of fluorine-containing water.