Patents by Inventor Weixia Chen

Weixia Chen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Coke separation process in paste plant
    Patent number: 7987992
    Abstract: The invention describes a process and apparatus producing a dense coke fraction from a first particulate coke fraction having a first average density and a first average particle size distribution, stratifying the coke fraction in a density separator into at least two fractions, the at least two fractions comprising a light coke fraction and the dense coke fraction. The dense fraction having an average density greater than the first average density and a particle size distribution substantially equivalent to the first average particle size distribution. The apparatus includes an inclined oscillating table comprising a gas-pervious deck, and a gas mover.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: August 2, 2011
    Assignee: Rio Tinto Alcan International Limited
    Inventors: Pierre Laurin, Nathalie Bouchard, Weixia Chen, Cyril Gaudreault, Yvon Ménard
  • High swelling ramming paste for aluminum electrolysis cell
    Patent number: 7785497
    Abstract: A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode butts or calcined coke increases the sodium swelling index of the paste by about four times higher than that of regular ramming pastes. This new high swelling cold ramming paste may also contain an amount of a refractory hard material, such as TiB2.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: August 31, 2010
    Assignee: Alcan International Limited
    Inventors: Amir A. Mirchi, Weixia Chen, Lise Lavigne, Emmanuel Bergeron, Jules Bergeron
  • COKE SEPARATION PROCESS IN PASTE PLANT
    Publication number: 20080173573
    Abstract: The invention describes a process and apparatus producing a dense coke fraction from a first particulate coke fraction having a first average density and a first average particle size distribution, stratifying the coke fraction in a density separator into at least two fractions, the at least two fractions comprising a light coke fraction and the dense coke fraction. The dense fraction having an average density greater than the first average density and a particle size distribution substantially equivalent to the first average particle size distribution. The apparatus includes an inclined oscillating table comprising a gas-pervious deck, and a gas mover.
    Type: Application
    Filed: January 8, 2008
    Publication date: July 24, 2008
    Inventors: Pierre Laurin, Nathalie Bouchard, Weixia Chen, Cyril Gaudreault, Yvon Menard
  • High swelling ramming paste for aluminum electrolysis cell
    Publication number: 20070138445
    Abstract: A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode butts or calcined coke increases the sodium swelling index of the paste by about four times higher than that of regular ramming pastes. This new high swelling cold ramming paste may also contain an amount of a refractory hard material, such as TiB2.
    Type: Application
    Filed: January 29, 2007
    Publication date: June 21, 2007
    Inventors: Amir Mirchi, Weixia Chen, Lise Lavigne, Emmanuel Bergeron, Jules Bergeron
  • High swelling ramming paste for aluminum electrolysis cell
    Patent number: 7186357
    Abstract: A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode butts or calcined coke increases the sodium swelling index of the paste by about four times higher than that of regular ramming pastes. This new high swelling cold ramming paste may also contain an amount of a refractory hard material, such as TiB2.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: March 6, 2007
    Assignee: Alcan International Limited
    Inventors: Amir A. Mirchi, Weixia Chen, Lise Lavigne, Emmanuel Bergeron, Jules Bergeron
  • High swelling ramming paste for aluminum electrolysis cell
    Publication number: 20040178063
    Abstract: A new ramming paste for aluminum reduction cell cathodes is a high swelling cold ramming paste made of a blend of pitch, light oil diluent and an aggregate comprising a mixture of anthracite and crushed anode butts or calcined coke. The presence of the crushed anode butts or calcined coke increases the sodium swelling index of the paste by about four times higher than that of regular ramming pastes. This new high swelling cold ramming paste may also contain an amount of a refractory hard material, such as TiB2.
    Type: Application
    Filed: March 12, 2003
    Publication date: September 16, 2004
    Inventors: Amir A. Mirchi, Weixia Chen, Lise Lavigne, Emmanuel Bergeron, Jules Bergeron