Physical properties
Moreover, it is required that the dissolution rate of alumina in the cryolite melt is fast, the bottom of the electrolytic cell
tank is deep and deep; the heat insulation of the shell on the electrolyte is good; the moisture is not absorbed in the air, the
flying loss is small, the fluidity is good, and the transportation is convenient. And to facilitate the automatic feeding of the
electrolytic cell. All of these properties depend on the physical properties of the alumina.

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.