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Title: 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 spend 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:
; ;  [1]
  1. AJT Enterprises, Inc.
Publication Date:
Research Org.:
Albany Research Center (ARC), Albany, OR (United States)
Sponsoring Org.:
USDOE - Office of Fossil Energy (FE)
OSTI Identifier:
896223
Patent Number(s):
DOE/ARC-2000-009
Application Number:
U.S. Patent 6,498,282 B1; TRN: US200703%%798
Assignee:
U.S. Patent Office, Washington, DC United States of America as represented by the United States Department of Energy, Washington, DC (US)
Resource Type:
Patent
Resource Relation:
Patent File Date: 2000 Jun 19
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AFTERBURNERS; AIR POLLUTION CONTROL; ALUMINIUM; ARC FURNACES; CARBON OXIDES; CYANIDES; ELECTRIC ARCS; ELECTRODES; FLUORIDES; FLUORINE; FURNACES; GRAPHITE; IRON; IRON OXIDES; LINERS; OXIDES; SCRUBBERS; aluminum spent potliner; electrode arc furnace; electric arc furnace; EAF

Citation Formats

O'Connor, William K, Turner, Paul C, and Addison, G 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, G W. Method for processing aluminum spent potliner in a graphite electrode arc furnace. United States.
O'Connor, William K, Turner, Paul C, and Addison, G W. 2002. "Method for processing aluminum spent potliner in a graphite electrode arc furnace". United States. https://www.osti.gov/servlets/purl/896223.
@article{osti_896223,
title = {Method for processing aluminum spent potliner in a graphite electrode arc furnace},
author = {O'Connor, William K and Turner, Paul C and Addison, G W},
abstractNote = {A method of processing spent aluminum pot liner containing carbon, cyanide compositions, fluorides and inorganic oxides. The spend 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 = {},
url = {https://www.osti.gov/biblio/896223}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 24 00:00:00 EST 2002},
month = {Tue Dec 24 00:00:00 EST 2002}
}