Combination for electrolytic reduction of alumina
Abstract
An electrolytic bath for use during the electrolytic reduction of alumina to aluminum. The bath comprises molten electrolyte having the following ingredients: AlF.sub.3 and at least one salt selected from the group consisting of NaF, KF, and LiF; and about 0.004 wt. % to about 0.2 wt. %, based on total weight of the molten electrolyte, of at least one transition metal or at least one compound of the metal or both. The compound is, a fluoride; oxide, or carbonate. The metal is nickel, iron, copper, cobalt, or molybdenum. The bath is employed in a combination including a vessel for containing the bath and at least one non-consumable anode and at least one dimensionally stable cathode in the bath. Employing the instant bath during electrolytic reduction of alumina to aluminum improves the wetting of aluminum on a cathode by reducing or eliminating the formation of non-metallic deposits on the cathode.
- Inventors:
-
- Seattle, WA
- Lynnwood, WA
- Bulleen, AU
- Issue Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- OSTI Identifier:
- 874384
- Patent Number(s):
- 6379512
- Application Number:
- 09/721,846
- Assignee:
- Northwest Aluminum Technology (The Dalles, OR)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES C25C - PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS
- DOE Contract Number:
- 310468-A-UF
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- combination; electrolytic; reduction; alumina; bath; aluminum; molten; electrolyte; following; ingredients; alfsub3; salt; selected; consisting; naf; kf; lif; 0004; wt; 02; based; total; weight; transition; metal; compound; fluoride; oxide; carbonate; nickel; iron; copper; cobalt; molybdenum; employed; including; vessel; containing; non-consumable; anode; dimensionally; stable; cathode; employing; instant; improves; wetting; reducing; eliminating; formation; non-metallic; deposits; transition metal; electrolytic reduction; electrolytic bath; /204/
Citation Formats
Brown, Craig W, Brooks, Richard J, Frizzle, Patrick B, and Juric, Drago D. Combination for electrolytic reduction of alumina. United States: N. p., 2002.
Web.
Brown, Craig W, Brooks, Richard J, Frizzle, Patrick B, & Juric, Drago D. Combination for electrolytic reduction of alumina. United States.
Brown, Craig W, Brooks, Richard J, Frizzle, Patrick B, and Juric, Drago D. Tue .
"Combination for electrolytic reduction of alumina". United States. https://www.osti.gov/servlets/purl/874384.
@article{osti_874384,
title = {Combination for electrolytic reduction of alumina},
author = {Brown, Craig W and Brooks, Richard J and Frizzle, Patrick B and Juric, Drago D},
abstractNote = {An electrolytic bath for use during the electrolytic reduction of alumina to aluminum. The bath comprises molten electrolyte having the following ingredients: AlF.sub.3 and at least one salt selected from the group consisting of NaF, KF, and LiF; and about 0.004 wt. % to about 0.2 wt. %, based on total weight of the molten electrolyte, of at least one transition metal or at least one compound of the metal or both. The compound is, a fluoride; oxide, or carbonate. The metal is nickel, iron, copper, cobalt, or molybdenum. The bath is employed in a combination including a vessel for containing the bath and at least one non-consumable anode and at least one dimensionally stable cathode in the bath. Employing the instant bath during electrolytic reduction of alumina to aluminum improves the wetting of aluminum on a cathode by reducing or eliminating the formation of non-metallic deposits on the cathode.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 30 00:00:00 EDT 2002},
month = {Tue Apr 30 00:00:00 EDT 2002}
}