Production of specialty aluminum alloys using partition of feed impurities

摘要

A series of inventions leading to the production of specific aluminum alloys (especially aluminum beverage can sheet product) through novel approach of introducing, selectively partitioning and managing alloying elements. This invention also enables manufacturing practices to enhance the performance characteristics of aluminum alloys produced. The selected elements can be derived from carbon anodes made from calcined petroleum coke with high metallic contents (such as nickel and vanadium). Alloying elements can also be introduced and managed from other raw material such as alumina and bath constituents added during aluminum smelting process. Additionally, cell operating parameters, such as cell temperature, off gas flow rate, aluminum tapping rate and impurity partition characteristics can also be manipulated to produce low cost aluminum alloys and facilitate utilization of high metallic content calcined petroleum coke.

主权项

1. A method of forming high vanadium aluminum, the method comprising:
a) providing a series of aluminum producing electrolytic cells, the series having at least one donor cell and at least one receiver cell; b) feeding alumina to the series of aluminum producing electrolytic cells; c) collecting fumes from at least one donor cell; d) dry scrubbing the collected fumes in the alumina to be fed to at least one receiver cell; and e) operating the cells to produce vanadium enriched aluminum in at least one receiver cell; wherein the vanadium enriched aluminum comprises 0.01 to 0.25 wt. % vanadium.