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What are the physical properties of alumina balls and what are the applications
Release time:
2023-08-17
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The indicators used to characterize the physical properties of alumina are: angle of repose, α-Al203 content, bulk density, particle size and specific surface area, and wear coefficient.
The indicators used to characterize the physical properties of alumina are: angle of repose, α-Al203 content, bulk density, particle size and specific surface area, and wear coefficient.
1. Angle of Rest. The repose angle of alumina refers to the inclination angle of natural accumulation of materials on a smooth plane. The repose angle of alumina in the electrolyte is more easily dissolved, in the electrolysis process can be well covered on the electrolyte crust, flying loss is also small. (Alumina ball Alumina powder: http://www.sdzxkj.com)
2. a-Al2O3 content. The a-Al2O3 content in alumina reflects the degree of calcination of alumina, the higher the degree of calcination, the more the a-Al2O3 content, the hygroscopicity of alumina becomes worse with the increase of a-Al2O3 content. Therefore, alumina for electrolysis is required to contain a certain amount of a-Al2O3. However, the solubility of a-Al2O3 in electrolyte is worse than that of Y-Al203.
3. Bulk density. The bulk density of alumina refers to the weight of the material per unit volume in the natural state. In general, alumina having 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 in the electrolyte dissolution rate is slow, or even precipitation; over the rules easy to fly loss.
5. Specific surface area. The specific surface area of alumina refers to the total surface area of the sum of the external surface area and the internal pore surface area per unit weight of the material. It is an important indicator of the activity of the material. Alumina with a large specific surface area has good solubility and high activity in the electrolyte, but it is easy to absorb moisture.
6. Wear coefficient. The so-called wear coefficient is the percentage change of the particle content in the sample after the alumina is abraded on the fluidized bed under certain conditions. The wear coefficient is a physical indicator of the strength of alumina.
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