Why can cryolite be used as a flux?

Why can cryolite be used as a flux?

Cryolite is a cosolvent used in the aluminum industry. Alumina dissolves in cryolite, like a solution. Moreover, dissolution, which is much easier than melting, will lower the natural melting point. And why does it melt? Next cryolite manufacturer - Jin Shengwei fluoride chemical industry to explain to you, I hope you can help.

Data: in addition to soluble alumina, it also has some other indispensable properties, such as no more than aluminum correction of electrical elements, good stability, decomposition in general conditions, no volatilization, no delixing, melting point higher than aluminum, good electrical conductivity, electricity saving, etc. It can be said that without cryolite, the world might not have such a large-scale aluminum industry, the price would not be so low, and the application would not be so widespread.

Cryolite is used as the solvent to dissolve the alumina and electrolyze it. It plays a key role here, it solves the alumina melting point is high (up to 2 050 ℃), and is not conductive, can not be electrolysis difficulties. Alumina dissolved in it can be electrolysis at the temperature (940 ℃ ~ 980 ℃). It has other advantages, it is lighter than aluminum in the molten state, electrolytic aluminum sinks at the bottom of the tank, cryolite floating on it, plays a role in preventing aluminum from being oxidized by air.