Patents Assigned to Cadence Chemical Resources, Inc.
  • Patent number: 5226774
    Abstract: An apparatus is provided for charging combustible solids through a port in the wall of a rotating kiln into a heated zone of the kiln. The apparatus includes a port closure comprising inner and outer portions which cooperate to define a passage for closure-cooling air flow when the closure is in a port-closed position. A transfer assembly is mounted on the kiln wall in alignment with the port. During kiln rotation combustible solids are loaded from a staging assembly onto the transfer assembly for alignment with the port and delivery into the kiln.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: July 13, 1993
    Assignees: Cadence Chemical Resources, Inc., Ash Grove Cement Company
    Inventors: James R. Tutt, Michel R. Benoit
  • Patent number: 5224433
    Abstract: A method is described for environmentally sound usage of combustible hazardous waste in an operating rotary kiln. The method is particularly adapted for disposal of solid hazardous wastes, optionally in the form of a blended waste homogenate, Packaged in sealable containers. The containers are used as fuel modules and charged into a rotary kiln cylinder where kiln gas temperatures range from about 950.degree. to about 1200.degree. C. to achieve high destruction and removal efficiencies.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: July 6, 1993
    Assignees: Cadence Chemical Resources, Inc., Ash Grove Cement Company
    Inventors: Michel R. Benoit, Eric R. Hansen, Theodore J. Reese
  • Patent number: 5156676
    Abstract: Methods are disclosed for the use of inexpensive volatile fuels in the calcining zone of a cement kiln during the manufacture of cement clinker in a rotary vessel.
    Type: Grant
    Filed: May 7, 1991
    Date of Patent: October 20, 1992
    Assignees: Hoke M. Garrett, Ash Grove Cement Company, Cadence Chemical Resources, Inc.
    Inventors: Hoke M. Garrett, Eric Hansen
  • Patent number: 5122189
    Abstract: Methods are disclosed for the use of inexpensive volatile fuels in the calcining zone of a cement kiln during the manufacture of cement clinker in a rotary vessel.
    Type: Grant
    Filed: April 13, 1990
    Date of Patent: June 16, 1992
    Assignees: Hoke M. Garrett, Ash Grove Cement Company, Cadence Chemical Resources, Inc.
    Inventors: Hoke M. Garrett, Eric Hansen
  • Patent number: 5083516
    Abstract: A method is described for environmentally sound usage of combustible hazardous waste in an operating rotary kiln. The method is particularly adapted for disposal of solid hazardous wastes, optionally in the form of a blended waste homogenate, packaged in sealable containers. The containers are used as fuel modules and charged into a rotary kiln cylinder where kiln gas temperatures range from about 950.degree. to about 1200.degree. C. to achieve high destruction and removal efficiencies.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: January 28, 1992
    Assignees: Cadence Chemical Resources, Inc., Ash Grove Cement Company
    Inventors: Michel R. Benoit, Eric R. Hansen, Theodore J. Reese
  • Patent number: 5078594
    Abstract: An apparatus is provided for charging combustible solids through a port in the wall of a rotating kiln into a heated zone of the kiln. The apparatus includes a port closure comprising inner and outer portions which cooperate to define a passage for closure-cooling air flow when the closure is in a port-closed position. A transfer assembly is mounted on the kiln wall in alignment with the port. During kiln rotation combustible solids are loaded from a staging assembly onto the transfer assembly for alignment with the port and delivery into the kiln.
    Type: Grant
    Filed: January 28, 1991
    Date of Patent: January 7, 1992
    Assignees: Cadence Chemical Resources, Inc., Ash Grove Cement Company
    Inventors: James R. Tutt, Michel R. Benoit
  • Patent number: 4974529
    Abstract: A method is described for environmentally sound usage of combustible hazardous waste in an operating rotary kiln. The method is particularly adapted for disposal of solid hazardous wastes, optionally in the form of a blended waste homogenate, packaged in sealable containers. The containers are used as fuel modules and charged into a rotary kiln cylinder where kiln gas temperatures range from about 950.degree. to about 1200.degree. C. to achieve high destruction and removal efficiencies.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: December 4, 1990
    Assignees: Cadence Chemical Resources, Inc., Ash Grove Cement Company
    Inventors: Michel R. Benoit, Eric R. Hansen, Theodore J. Reese
  • Patent number: 4969407
    Abstract: A method is described for environmentally sound usage of combustible hazardous waste in an operating rotary kiln. The method is particularly adapted for disposal of solid hazardous wastes, optionally in the form of a blended waste homoenate, packaged in sealable containers. The containers are used as fuel modules and charged into a rotary kiln cylinder where kiln gas temperatures range from about 950.degree. to about 1200.degree. C. to achieve high destruction and removal efficiencies.
    Type: Grant
    Filed: January 11, 1990
    Date of Patent: November 13, 1990
    Assignees: Cadence Chemical Resources, Inc., Ash Grove Cement Company
    Inventors: Michel R. Benoit, Eric R. Hansen, Theodore J. Reese
  • Patent number: 4930965
    Abstract: An apparatus is provided for charging containerized fuel, particularly combustible hazardous waste homogenates, through a wall of a rotating kiln with minimal perturbation of mineral processing conditions. During kiln rotation fuel modules are loaded into the apparatus and charged into the kiln through a port in the kiln cylinder wall and onto the contained mineral bed. In a preferred embodiment the apparatus includes a device for actuating a port closure and a drop tube extending from the port into the kiln cylinder and positioned so that in-process mineral material does not contact the port closure during rotation of the kiln cylinder.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: June 5, 1990
    Assignees: Cadence Chemical Resources, Inc., Ash Grove Cement Company
    Inventors: Charles D. Peterson, James R. Tutt, John Cody
  • Patent number: 4850290
    Abstract: A method is described for environmentally sound usage of combustible hazardous waste in an operating rotary kiln. The method is particularly adapted for disposal of solid hazardous wastes, optionally in the form of a blended waste homogenate, packaged in sealable containers. The containers are used as fuel modules and charged into a rotary kiln cylinder where kiln gas temperatures range from about 950.degree. to about 1200.degree. C. to achieve high destruction and removal efficiencies.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: July 25, 1989
    Assignees: Ash Grove Cement Company, Cadence Chemical Resources, Inc.
    Inventors: Michel R. Benoit, Eric R. Hansen, Theodore J. Reese