Domestic alumina is mainly imported from Australia. Australian alumina imports account for 67% of domestic alumina imports, Indonesia accounts for 5%, and India accounts for 2%. China's alumina production needs to rely on imports to meet domestic demand, and alumina imports far exceed exports.
Electrolytic aluminum production process
In 1886, American engineers invented the cryolite-alumina molten salt electrolytic aluminum smelting method.
The electrolytic aluminum production process is as follows:
The first step: electrolytic cell roasting (drying the electrolytic cell to 930℃~970℃, usually takes 4 to 8 days)
Step 2: Clean and debug the electrolytic cell (melt the cryolite solvent to form the aluminum electrolytic melt, clean up the carbon residue, and adjust the main technical parameters of the electrolytic cell)
Step Three: Electrolytic Aluminum Smelting Production
Electrolytic aluminum smelting is a smelting link with high energy consumption and high "carbon" emissions. Each ton of electrolytic aluminum required to smelt 13,500 kw.h of direct current, accounting for more than 70% of the energy consumption of the entire aluminum industry. The smelting process emits large amounts of carbon dioxide.
