Alumina is produced after aluminum oxidation, so how can alumina be reduced to aluminum? Is the process cumbersome and what is the cost?

In industry, aluminum is made of electrolytic molten aluminum oxide!

The melting point of alumina is 2050℃, which is very difficult to melt directly, and it also consumes a lot of fuel and increases the cost! Therefore, cryolite (Na3AlF6, sodium hexafluoroaluminate) is added before heating in industry to indirectly reduce the melting point of alumina, then it is heated to 1000℃ to 1 100℃, and then an electrode is inserted for electrolysis, so that aluminum water is discharged from the cathode and oxygen is discharged from the anode. Finally, the aluminum liquid is cooled in an oxygen-free environment to obtain elemental aluminum.