Method for processing aluminum spent potliner in a graphite electrode ARC furnace
Abstract
A method of processing spent aluminum pot liner containing carbon, cyanide compositions, fluorides and inorganic oxides. The spent aluminum pot liner is crushed iron oxide is added to form an agglomerated material. The agglomerated material is melted in an electric arc furnace having the electrodes submerged in the molten material to provide a reducing environment during the furnace operation. In the reducing environment, pot liner is oxidized while the iron oxides are reduced to produce iron and a slag substantially free of cyanide compositions and fluorides. An off-gas including carbon oxides and fluorine is treated in an air pollution control system with an afterburner and a scrubber to produce NaF, water and a gas vented to the atmosphere free of cyanide compositions, fluorine and CO.
- Inventors:
-
- Lebanon, OR
- Independence, OR
- St. Stephen, SC
- Issue Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- OSTI Identifier:
- 874961
- Patent Number(s):
- 6498282
- Application Number:
- 09/596,438
- Assignee:
- The United States of America as represented by the United States Department (Washington, DC)
- Patent Classifications (CPCs):
-
A - HUMAN NECESSITIES A62 - LIFE-SAVING A62D - CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; processing; aluminum; spent; potliner; graphite; electrode; furnace; pot; liner; containing; carbon; cyanide; compositions; fluorides; inorganic; oxides; crushed; iron; oxide; added; form; agglomerated; material; melted; electric; electrodes; submerged; molten; provide; reducing; environment; operation; oxidized; reduced; produce; slag; substantially; free; off-gas; including; fluorine; treated; air; pollution; control; afterburner; scrubber; naf; water; gas; vented; atmosphere; iron oxide; substantially free; molten material; inorganic oxide; /588/
Citation Formats
O'Connor, William K, Turner, Paul C, and Addison, Gerald W. Method for processing aluminum spent potliner in a graphite electrode ARC furnace. United States: N. p., 2002.
Web.
O'Connor, William K, Turner, Paul C, & Addison, Gerald W. Method for processing aluminum spent potliner in a graphite electrode ARC furnace. United States.
O'Connor, William K, Turner, Paul C, and Addison, Gerald W. Tue .
"Method for processing aluminum spent potliner in a graphite electrode ARC furnace". United States. https://www.osti.gov/servlets/purl/874961.
@article{osti_874961,
title = {Method for processing aluminum spent potliner in a graphite electrode ARC furnace},
author = {O'Connor, William K and Turner, Paul C and Addison, Gerald W},
abstractNote = {A method of processing spent aluminum pot liner containing carbon, cyanide compositions, fluorides and inorganic oxides. The spent aluminum pot liner is crushed iron oxide is added to form an agglomerated material. The agglomerated material is melted in an electric arc furnace having the electrodes submerged in the molten material to provide a reducing environment during the furnace operation. In the reducing environment, pot liner is oxidized while the iron oxides are reduced to produce iron and a slag substantially free of cyanide compositions and fluorides. An off-gas including carbon oxides and fluorine is treated in an air pollution control system with an afterburner and a scrubber to produce NaF, water and a gas vented to the atmosphere free of cyanide compositions, fluorine and CO.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 24 00:00:00 EST 2002},
month = {Tue Dec 24 00:00:00 EST 2002}
}