초록 ▼

An electrolytic cell for the production of aluminum metal comprises a permanent hollow anode structure of substantially corrosion-resistant material, with numerous perforations in the base of said structure, a packed bed of consumable carbon pieces supported by said base within the hollow space of s

An electrolytic cell for the production of aluminum metal comprises a permanent hollow anode structure of substantially corrosion-resistant material, with numerous perforations in the base of said structure, a packed bed of consumable carbon pieces supported by said base within the hollow space of said structure, means for heating said base so as to form a molten cryolite bath upon cell start-up, means for controllably cooling the walls of said anode structure to form a protective layer of frozen cryolite over said walls at the air-cryolite interfaces, means for adding fresh pieces of said consumable carbon to replenish said packed bed when a substantial portion thereof has been consumed, and means for adjusting the depth of immersion of said packed bed within said molten cryolite bath so as to reduce voltage and energy requirements or increase the rate of aluminum production.

대표청구항 ▼

A method of supplying consumable carbon anode material to an aluminum-producing electrolytic cell, which comprises: (a) causing pieces of electrochemically consumable carbon to drop into a permanent hollow anode structure so as to form a packed bed of carbon within said structure; (b) causing a lowe

A method of supplying consumable carbon anode material to an aluminum-producing electrolytic cell, which comprises: (a) causing pieces of electrochemically consumable carbon to drop into a permanent hollow anode structure so as to form a packed bed of carbon within said structure; (b) causing a lower portion of said anode structure and of said packed bed to be submersed in a molten salt bath of said electrolytic cell; and (c) causing electric current to flow from said permanent structure to said packed bed and thence through said molten salt bath to the cathode of said electrolytic cell so as to form aluminum metal near said cathode.