Patent · US Expired

Method and reactor for production of aluminum by carbothermic reduction of alumina

US6805723B2 · kind B2 · utility

6Cited by

4References

20Claims

0Family size

Assignees

ALCOA INC. · US
ELKEM ASA · NO

Inventors

Jan A. Aune · Ski, NO
Kai Johansen · Kristiansand, NO

Key dates

Filing date	Mar 6, 2003
Grant date	Oct 19, 2004
Priority date	—
Expiry date	Apr 25, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22B21/06
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A hollow partition wall is employed to feed carbon material to an underflow of a carbothermic reduction furnace used to make aluminum. The partition wall divides a low temperature reaction zone where aluminum oxide is reacted with carbon to form aluminum carbide and a high temperature reaction zone where the aluminum carbide and remaining aluminum oxide are reacted to form aluminum and carbon monoxide.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.