Filling Grains

High-performance activated alumina balls can bring the following benefits in unshaped refractory ingredients: increase the density, fluidity and strength of the body, increase the amount of secondary mullite, etc., and reduce the amount of water and porosity. In addition, activated alumina can also be used as a desiccant, with large water absorption, fast drying speed, and regeneration.

 

The activated alumina ball itself also has many characteristics, so zawa will give you a detailed introduction! 　　

In the petrochemical and fertilizer industries, they are widely used as catalysts and catalyst carriers. Activated alumina also has adsorption characteristics, so it is used as a desiccant for gases and liquids, an adsorbent for gas purification, a defluorinating agent for drinking water, and a color and odor elimination agent for industrial sewage.　　

 

The following also explains the physical properties of activated alumina balls: 　　

1. The angle of repose.

The angle of repose of alumina refers to the inclination angle of the natural accumulation of materials on a smooth surface. Alumina with a larger angle of repose is easier to dissolve in the electrolyte, and can be well covered on the electrolyte crust during the electrolysis process, and the flying loss is also small.　　

2. The content of a-Al2O3.

The content of a-Al2O3 in alumina reflects the degree of calcination of alumina. The higher the degree of calcination, the more a-Al2O3 content, and the hygroscopicity of alumina becomes worse as the content of a-Al2O3 increases. Therefore, the alumina used for electrolysis requires a certain amount of a-Al2O3. But the solubility of a-Al2O3 in the electrolyte is worse than that of Υ-Al203.　　

3. Bulk density.

 The bulk density of alumina refers to the weight of the material per unit volume in its natural state. Generally, alumina with a small bulk density facilitates dissolution in the electrolyte.　　

4. Granularity.

The particle size of alumina refers to its thickness. The particle size of alumina must be appropriate, too coarse to dissolve in the electrolyte slowly, or even precipitate; too small to easily fly and lose.　　

5. Specific surface area.

The specific surface area of alumina refers to the total surface area ofthe sum of the outer surface area and the inner pore surface area of the unit weight of the material. It is an important indicator of the activity of a substance. Alumina with a large specific surface area has good solubility in the electrolyte, high activity, but easy to absorb moisture.　　

6. Wear coefficient.

The so-called wear coefficient is the percentage change in the particle size content of the sample after alumina is collided on a fluidized bed under controlled conditions. The wear coefficient is a physical index that characterizes the strength of alumina.　　

 

The above are the six physical properties of activated alumina balls that zawa gave you in detail.

Application: Widely used in aluminum filter furnaces as  fillers.