Method for processing aluminum spent potliner in a graphite electrode arc furnace

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Description

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 ... continued below

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O'Connor, William K.; Turner, Paul C. & Addison, G.W. (AJT Enterprises, Inc.) December 24, 2002.

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Description

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.

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  • Patent File Date: 2000 Jun 19

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  • Report No.: DOE/ARC-2000-009
  • Grant Number: None
  • Office of Scientific & Technical Information Report Number: 896223
  • Archival Resource Key: ark:/67531/metadc878396

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 24, 2002

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

Description Last Updated

  • Nov. 4, 2016, 2:09 p.m.

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O'Connor, William K.; Turner, Paul C. & Addison, G.W. (AJT Enterprises, Inc.). Method for processing aluminum spent potliner in a graphite electrode arc furnace, text, December 24, 2002; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc878396/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.