METHOD FOR DISSOLVING ALUMINA IN ELECTROLYTE Russian patent published in 2007 - IPC C25C3/06 C01F7/02 

FIELD: non-ferrous metallurgy, namely production of aluminum.

SUBSTANCE: method comprises steps of dissolving alumina in electrolyte of operating cells; reducing Al³⁺ ions in cathode at generation of melt aluminum; creating of gaseous CO and CO₂ due to interaction of O^2- ions with carbon of carbon electrode. Before supplying into cell dry alumina the last is subjected to chemical and mechanical activation in planetary cyclic-action mill for time period 5 - 300 s at relation of mass values of activated material and grinding bodies 1 : 100. Interaction of alumina with electrolyte of industrial aluminum cells (at cryolite relation 2.32) is realized at temperature 960 - 980 C known in processes for electrolysis of aluminum.

EFFECT: intensified electrolysis of aluminum.

2 dwg, 1 ex