Having Structure Agitating Or Controlling The Motion Of The Charge Patents (Class 432/118)
  • Patent number: 11008713
    Abstract: A dryer adapted for use in an asphalt plant. The dryer includes a drum having an inner wall and a flight having a proximal end connecting the flight to the inner wall of the drum and a distal end that is spaced apart from the proximal end. A first profile extends from the proximal end to the distal end of the flight and defines a flight shape. A notch is formed in the distal end of the flight, which notch includes a notch shape that is defined by a second profile. The second profile has a length L, a center point, and a portion that substantially approximates a conic section.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: May 18, 2021
    Assignee: Astec, Inc.
    Inventors: Malcolm Leland Swanson, Andrew Muirhead Hobbs
  • Patent number: 10557097
    Abstract: A solid fuel manufacturing apparatus includes: a mixture producing device to produce a mixture by kneading wet combustible waste and a dehydrating agent to accelerate dehydrating the combustible waste; a mixture containing device; an intake device to introduce outside air into the mixture containing device; an exhaust device to discharge exhaust air out of the mixture containing device; a drive device to rotate the mixture containing device; a control device to control operations of the drive device; and a breaking device to break up the mixture contained in the mixture containing device. The dehydrating agent is made of an emulsion containing synthetic resin. The breaking device is placed along an inner peripheral wall of the mixture containing device and configured to scoop the mixture upward in the internal space and allow the mixture to freely fall from above in the internal space by rotation of the mixture containing device.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: February 11, 2020
    Assignee: AISAKU CO., LTD.
    Inventors: Shoichi Sudo, Wataru Yoshimura, Akihisa Okuda
  • Patent number: 8910393
    Abstract: A drum or drum segment for a drying apparatus of pourable material having built-in components arranged within the drum, which is rotatable about its central axis. The built-in components thoroughly mix and convey the pourable material from a drum entrance to a drum exit while guiding through a tempered gaseous transport fluid. Several support rings are arranged between the built-in components and the drum. The support rings are arranged to be statically supporting, but compensate tensile and compressive stresses in an elastic manner. The support rings are connected to the built-in components, a support frame and the drum, or a combination thereof A method for producing the drum or drum segments includes pre-mounting modules of built-in components and inserting the modules of built-in components into the drum or the drum segment.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: December 16, 2014
    Assignee: Dieffenbacher GmbH Maschinen—und Anlagenbau
    Inventors: Günter Kuhn, Wolfgang Fix-Mumme, Reinhard Kassner
  • Patent number: 8501142
    Abstract: This disclosure relates to carbonizing and activating carbonaceous material.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: August 6, 2013
    Assignee: British American Tobacco (Investments) Limited
    Inventors: Stephen Robert Tennison, Jonathan Robert Tunbridge, Roger Nicholas Place, Andrew John Blackburn, Alan Mark Giles
  • Patent number: 8485815
    Abstract: A rotary tube furnace (1) comprising an insulated heating chamber (4), the insulated heating chamber having a product discharge outlet (21) and a process tube inlet (39), a heating element (14) operatively arranged to selectively heat the heating chamber, a generally horizontally extending process tube (2) supported for rotation relative to the heating chamber, the process tube having a first portion (36) generally arranged outside of the heating chamber and a cantilevered second portion (37) extending from the first portion into the heating chamber and terminating at a discharge end (38) within the heating chamber, a feed mechanism (40) configured and arranged to feed product into the process tube, and a bearing assembly operating between a support frame (34) and the first portion of the process tube and configured and arranged to support the process tube and transmit rotational torque to the process tube.
    Type: Grant
    Filed: May 7, 2009
    Date of Patent: July 16, 2013
    Assignee: Harper International Corporation
    Inventors: Peter R. Witting, William J. Stry, Carl H Vander Weide, Jeffrey E. Purdy, Jason A. Ginn
  • Publication number: 20130078589
    Abstract: The invention relates to a tubular reactor with a rotating reactor chamber (9) for thermal treatment of biomass. It is characterized by the reactor chamber (9) being subdivided into zones by ring-shaped plates (10). These zones cause the particles to be retained in a particular area and thoroughly mixed there, i.e., the particles being treated are homogenized and the retention time also becomes more homogenous.
    Type: Application
    Filed: August 3, 2012
    Publication date: March 28, 2013
    Inventors: Klaus Trattner, Heinrich Pauli, Wolfgang Plienegger, Wolfgang Janisch
  • Publication number: 20120282563
    Abstract: Provided is a rotary kiln having a cylindrical shell having an inner cylindrical surface and a longitudinal axis and a kiln lining disposed on the inner cylindrical surface of the shell.
    Type: Application
    Filed: May 5, 2011
    Publication date: November 8, 2012
    Applicant: Magnesita Refractories Company
    Inventor: Joel R. Filius
  • Publication number: 20120276495
    Abstract: A method and apparatus processing materials including medical waste, municipal waste, along with other wastes, and processing materials; the apparatus comprising an elongate pressure vessel of generally cylindrical configuration having an inlet end, and an end cap for the inlet.
    Type: Application
    Filed: May 15, 2012
    Publication date: November 1, 2012
    Inventors: Craig Gordon Boots, Robert D. Bartlett, Ryan J. Bright, Mark C. Woodin
  • Publication number: 20120264074
    Abstract: In the case of a rotary hearth furnace of annular construction for the heat treatment of workpieces, which has a furnace chamber, an annular rotary hearth, a rotary drive which drives the rotary hearth and a plurality of racks for receiving or supporting workpieces, which are arranged on the annular rotary hearth and are provided with receiving elements, which divide a respective rack into at least two horizontal planes for receiving workpieces, the intention is to provide a solution which makes extremely uniform heating of the workpieces to be heattreated in the furnace chamber possible in a structurally simple and cost-effective manner. This is achieved in that provision is made, at least between two horizontal planes of a respective rack, of at least one additional heating apparatus which heats the workpieces held in the corresponding horizontal planes.
    Type: Application
    Filed: February 28, 2012
    Publication date: October 18, 2012
    Applicant: LOI THERMPROCESS GMBH
    Inventors: Alfons Gockel, Dominikus Schröder
  • Publication number: 20120186968
    Abstract: Provided is a kiln lens comprising an annular structure defined by a section rotated about an axis. The section comprises a top surface, a base surface, an upstream surface forming an angle with the base of from 10 to 75 degrees, inclusive, and a downstream surface forming an angle with the base of from 10 to 75 degrees, inclusive.
    Type: Application
    Filed: January 25, 2012
    Publication date: July 26, 2012
    Inventor: Thomas H. Orac
  • Patent number: 8177549
    Abstract: A method and apparatus processing materials including medical waste, municipal waste, along with other wastes, and processing materials; the apparatus comprising an elongate pressure vessel of generally cylindrical configuration having an inlet end, and an end cap for the inlet.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: May 15, 2012
    Inventors: Craig Gordon Boots, Robert D. Bartlett, Ryan J. Bright, Mark C. Woodin
  • Patent number: 8172448
    Abstract: A method and template are provided for modifying an asphalt dryer/mixer that includes an outer drum and an inner drum with a plurality of mixing paddles, the two drums forming an annular mixing chamber in which asphalt cement and aggregate materials are mixed. The template comprises a bracket marking portion that is adapted to locate one or more brackets on the inner drum and a paddle reference portion that is adapted to locate the bracket marking portion with respect to a mixing paddle. A mixing paddle to be referenced for locating a bracket is selected and the template is placed on the inner drum with the paddle reference portion referencing the selected mixing paddle. The template is used to mark the location of the bracket, the bracket is affixed to the outer surface of the inner drum at the bracket location marked; and an agitation strand is attached to the bracket.
    Type: Grant
    Filed: September 3, 2009
    Date of Patent: May 8, 2012
    Assignee: Astec, Inc.
    Inventors: Larry W. Hudman, J. Greg Renegar, Michael C. Varner
  • Patent number: 7866977
    Abstract: The subject of the invention is a rotary tube (1), in particular for a rotary tubular kiln for the production of activated charcoal, according to the invention the rotary tube (1) being provided on its outside with at least one reinforcing element (8) for stabilizing the rotary tube (1) in the operating state. As a result, the rotary tube (1) exposed under operating conditions to high temperatures and consequently easily deformable is stabilized in its cross section and/or in its longitudinal direction, depending on the arrangement of the reinforcing element. In particular, the rotary tube (1), for example when it is used for the production of activated charcoal, with the accompanying high operating temperatures, is equipped with efficient resistance to pronounced pressure fluctuations occurring due to the method employed and is therefore also suitable, in particular, for carrying out processes under reduced or increased pressure.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: January 11, 2011
    Assignee: Blucher GmbH
    Inventors: Hasso Von Blücher, Torsten Weber
  • Patent number: 7811083
    Abstract: The invention has as subject matter a rotary tube, especially for a rotary tube kiln for the production of carbon, with several mixing elements arranged in the inner space of the rotary tube for a thorough mixing of a charged material. The rotary tube comprises a transitional area from a smaller inside cross section to a larger inside cross section of the rotary tube. The mixing elements are formed in the transitional area and/or are arranged in such a manner that the charged material is transported during operation by the mixing elements toward the smaller inside cross section. The result is an excellent thorough axial mixing and blending of the charged material, which results in an increased homogeneity of the activated carbon produced.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: October 12, 2010
    Assignee: Blucher GmbH
    Inventors: Bertram Böhringer, Jann-Michael Giebelhausen, Sven Fichtner
  • Publication number: 20100098615
    Abstract: A method is provided for carbonizing and activating carbonaceous material, which comprises supplying the material to an externally fired rotary kiln maintained at carbonizing and activating temperatures, the kiln having a downward slope to progress the material as it rotates, the kiln having an atmosphere substantially free of oxygen provided by a counter-current of steam or carbon dioxide, and annular weirs being provided at intervals along the kiln to control progress of the material. There may further be provided an externally fired rotary kiln for carbonizing and activating carbonaceous material having a hollow rotary body that has a downward slope towards a discharge end thereof, and which is provided at intervals along its length with annular weirs for controlling progress of the carbonaceous material. In embodiments, there is also provided a process is for producing discrete solid beads of polymeric material e.g.
    Type: Application
    Filed: October 4, 2007
    Publication date: April 22, 2010
    Inventors: Stephen Robert Tennison, Jonathan Robert Tunbridge, Roger Nicholas Place, Andrew John Blackburn, Alan Mark Giles
  • Publication number: 20090286193
    Abstract: A rotary tube furnace (1) comprising an insulated heating chamber (4), the insulated heating chamber having a product discharge outlet (21) and a process tube inlet (39), a heating element (14) operatively arranged to selectively heat the heating chamber, a generally horizontally extending process tube (2) supported for rotation relative to the heating chamber, the process tube having a first portion (36) generally arranged outside of the heating chamber and a cantilevered second portion (37) extending from the first portion into the heating chamber and terminating at a discharge end (38) within the heating chamber, a feed mechanism (40) configured and arranged to feed product into the process tube, and a bearing assembly operating between a support frame (34) and the first portion of the process tube and configured and arranged to support the process tube and transmit rotational torque to the process tube.
    Type: Application
    Filed: May 7, 2009
    Publication date: November 19, 2009
    Inventors: Peter R. Witting, William J. Stry, Carl H. Vander Weide, Jeffrey E. Purdy, Jason A. Ginn
  • Publication number: 20090215000
    Abstract: A method and apparatus processing materials including medical waste, municipal waste, along with other wastes, and processing materials; the apparatus comprising an elongate pressure vessel of generally cylindrical configuration having an inlet end, and an end cap for the inlet.
    Type: Application
    Filed: December 5, 2006
    Publication date: August 27, 2009
    Inventors: Craig Gordon Boots, Robert D. Bartlett, Ryan J. Bright, Mark C. Woodin
  • Patent number: 7575043
    Abstract: A conveyor for moving hot material at temperatures on this order of 1000° F. or higher along a trough receiving the material has one or more cooling liquid flow vessels extending over but spaced from the outer surface of a trough inner wall to indirectly cause cooling of the inner wall. A heat transfer connection conductively interconnect the vessel and the inner trough wall such as interposed thin webs or plates, or alternatively a mass of conductive beads interposed to controllably transfer heat into the cooling liquid flow vessel. A series of wear plates are clamped to a pushing side of a helical tube of an auger type conveyor, which tube can also receive a flow of cooling liquid. The arrangement of a mass of conductive beads is usable in other applications to provide a non rigid mechanical support of a controlled thermal conductivity.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: August 18, 2009
    Inventors: Richard W. Kauppila, Raymond W. Kauppila
  • Patent number: 7354266
    Abstract: A rotary kiln for pyroprocessing particulate material includes a cylindrical kiln shell supported for rotation about a longitudinal central axis. The kiln has a discharge opening that includes a lump breaker system. The lump breaker system includes multiple insert retainers mounted to the shell and positioned along the inner circumference of the rotary kiln. Each insert retainer includes multiple mounting slots for receiving breaker inserts that can be easily removed and replaced when worn. Each of the breaker inserts can be individually removed from its respective retainer without removing either the retainer or the layer of refractory in the rotary kiln.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: April 8, 2008
    Assignee: Metso Minerals Industries, Inc.
    Inventors: Samuel A. Miller, Neil R. Dock, John D. Zerphey, Glenn M. Hanson, III
  • Publication number: 20080070178
    Abstract: The invention has as subject matter a rotary tube, especially for a rotary tube kiln for the production of carbon, with several mixing elements arranged in the inner space of the rotary tube for a thorough mixing of a charged material. The rotary tube comprises a transitional area from a smaller inside cross section to a larger inside cross section of the rotary tube. The mixing elements are formed in the transitional area and/or are arranged in such a manner that the charged material is transported during operation by the mixing elements toward the smaller inside cross section. The result is an excellent thorough axial mixing and blending of the charged material, which results in an increased homogeneity of the activated carbon produced.
    Type: Application
    Filed: September 18, 2007
    Publication date: March 20, 2008
    Inventors: Bertram Bohringer, Jann-Michael Giebelhausen, Sven Fichtner
  • Patent number: 7311519
    Abstract: The invention provides a raw materials feeding apparatus capable of uniformly dispersing and feeding into a furnace agglomerated raw materials that are likely to undergo dusting, deformation and mutual adhesion. In a raw material feeding apparatus for a rotary hearth furnace, for feeding raw materials to a rotary hearth furnace by using a flat belt conveyor, the invention employs a construction in which a scraper for guiding the raw materials on the flat belt conveyor to a side surface of the flat belt conveyor is arranged obliquely to a traveling direction of the flat belt conveyor. Preferably, the scraper is arranged in such a manner as to guide the raw materials to both sides of the flat belt conveyor.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: December 25, 2007
    Assignees: Nippon Steel Corporation, Nittetsu Plant Designing Corporation
    Inventors: Shinji Shima, Yuichi Sakurai, Masahide Nagatomi
  • Patent number: 7229281
    Abstract: A method is described for reducing NOx emissions and improving energy efficiency during mineral processing in a rotary kiln. The method comprises injection of air with high velocity/high kinetic energy into the kiln to reduce or eliminate stratification of kiln gases. The method can be applied to mix gases in a rotary kiln vessel or in a preheater/precalciner vessel.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: June 12, 2007
    Assignees: Cadence Environmental Energy, Inc., Ash Grove Cement Company
    Inventors: Eric R. Hansen, Ralph A. Supelak, James R. Tutt
  • Patent number: 7204636
    Abstract: A rotary drum configured for the efficient blending, cooling, and screening of granular products having an outer cylindrical shell, an intake end, and an exit or discharge end. The rotary drum is normally rotated at a predetermined speed by a conventional drive package. Disposed on an inner surface of the cylindrical shell is a plurality of compound helical flights and scoops or lifts, configured to blend granular product as it cascades from the intake end to the discharge or exit end of the rotary drum. A coaxially disposed cylindrical air passage adjacent the discharge end of the rotary drum, comprising an inner cylinder, that directs a counter flow of cooling air through the rotary drum towards the intake end, for cooling the cascading granular product as it approaches the screening segment of the rotary drum.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: April 17, 2007
    Assignee: Didion Manufacturing Company
    Inventor: Charles J. Didion
  • Patent number: 7172414
    Abstract: The present invention relates to a rotary tube (1), in particular for a rotary tubular kiln for the production of activated carbon, said rotary tube (1) having a plurality of mixing elements (3), in particular metal turning plates, said mixing elements (3) being arranged in the interior (2) of the rotary tube (1) for circulating and/or mixing the charge material (4). The rotary tube (1) has apertures (5) for receiving securing sections (6) of the mixing elements (3), the securing sections (6) being welded to the outer side of the rotary tube (1). This prevents the welding location being exposed to the aggressive conditions in the interior (2) of the rotary tube (1) in the operating state during production of activated carbon, and it is readily possible for the welding location to be inspected from the outside, and for maintenance and repair to be carried out as necessary.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: February 6, 2007
    Assignee: Blücher GmbH
    Inventor: Hasso Von Blücher
  • Patent number: 7104788
    Abstract: The invention relates to an apparatus for cleaning and/or decontaminating polyester, in particular polyethylene terephthalate (PET). The apparatus has an at least partially heated rotary tubular furnace to be fed with a mixture of polyester and an alkaline material and is for carrying out a saponification reaction in the mixture. The invention is distinguished in that within the rotary tubular furnace a weir is disposed which at least partly closes the interior of the rotary tubular furnace, and an orifice is formed in the shell of the rotary tubular furnace adjacent the weir for separating undersize grain from the PET.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: September 12, 2006
    Assignee: Cleanaway Deutschland AG & Co. KG
    Inventors: Achim Ebel, Carlos Dario Gutierrez
  • Patent number: 7033167
    Abstract: The invention relates to an apparatus for cleaning and/or decontaminating polyester, in particular polyethylene terephthalate (PET). The apparatus has an at least partially heated rotary tubular furnace to be fed with a mixture of polyester and an alkaline material and is for carrying out a saponification reaction in the mixture. The invention is distinguished in that within the rotary tubular furnace a weir is disposed which at least partly closes the interior of the rotary tubular furnace.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: April 25, 2006
    Assignee: Cleanaway Deutschland AG & Co. KG
    Inventors: Achim Ebel, Carlos Dario Gutierrez
  • Patent number: 6901868
    Abstract: The plant for the thermal treatment of material, in particular scrap material, comprises at least a reaction zone within a rotary kiln having the longitudinal axis inclined of an angle in the range 0°±45° with regard to an horizontal plane and provided of first heating means and of at least a rotary screw having second heating means. The screw shaft is hollow and has, at least locally, apertures allowing the flow of gas from and/or into the reaction zone, a plurality of thermally conductive particles being movable within the reaction zone.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: June 7, 2005
    Assignee: Sea Marconi Technologies di Wander Tumiatti S.A.S.
    Inventors: Andreas Hornung, Henning Bockhorn, Karl Appenzeller, Carlo Maria Roggero, Wander Tumiatti
  • Patent number: 6892471
    Abstract: A material drying apparatus for substantially eliminating the liquid content of a sludge, the apparatus including a first stage operating at ambient pressure for heating the sludge; a second stage operating with partial vacuum for receiving heated sludge from the first stage for further heating and for drying the sludge by evaporation of substantially all liquid therefrom leaving a dry particulate material; and an evacuated cyclonic stage for applying sufficient centrifugal force to the dry particulate material to render this material odorless.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: May 17, 2005
    Inventor: Anders T. Ragnarsson
  • Patent number: 6860735
    Abstract: Disclosed is a rotary kiln that can be used efficiently in drying, dry distillation and incineration of various garbage and industrial wastes. The rotary kiln comprises a cylindrical furnace body (10) disposed to incline at a small angle from the horizontal plane, a cylindrical contact heater (20) supported in the furnace body (10), a rotation drive means (30) that drives the furnace body (10) and the contact heater (20) to rotate, a waste charging port (61), a processed material discharging port (18), a combustion gas supply means (40) that supplies a combustion gas into the cylindrical contact heater (20) and a combustion gas introducing means (50) that guides the combustion gas through the contact heater (20) from a distal end to a proximate end thereof, and then guides the combustion gas through a space (S) between the contact heater (20) and the furnace body (10) from the proximate end to the distal end, thereby to charge.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: March 1, 2005
    Assignee: S. Mac Co., Ltd.
    Inventor: Masanobu Shimono
  • Patent number: 6749425
    Abstract: An indirect heating furnace heats a substance in a reaction tube with a high-temperature combustion gas without contact between the substance and the combustion gas. The reaction tube is a stationary ceramic tube. A combustion device for supplying said heating high-temperature combustion gas into the furnace in comprised of at least one pair of regenerative burners.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: June 15, 2004
    Assignees: JP Steel Plantech Co., Yoshizawa Lime Industry Co., Ltd., Merichem Company
    Inventor: Michio Nakayama
  • Patent number: 6726351
    Abstract: The present invention is to a method and apparatus for changing the flighting (20) within a mixing drum (12). A plurality of radially spaced apart doors or paddles (30) are connected to one of the two adjacent supports (60). Each door or paddle (30) is pivotally connected (35,34) to the interior (13) of the drum (12) and can be either open or closed depending on which fixed support (60) the door/paddle is connected to.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: April 27, 2004
    Assignee: Dillman Equipment, Inc.
    Inventor: Bruce A. Dillman
  • Publication number: 20040076918
    Abstract: A trefoil for a rotary kiln is provided that has at least three spoke-like refractory legs. Each one of the legs extends radially outwardly from a center of the trefoil; spans approximately from the kiln shell to the center of the kiln; is pre-formed outside of the kiln for installation as a single-leg unit; and has a mating surface that preferably is uniform and even, thereby lacking interlocking features. The mating surfaces of the legs abut one another at the kiln center to provide mutual support. An alignment member, such as a pair of longitudinal angles, are welded to the kiln shell to position the legs. A corresponding method of installing the trefoil is disclosed that includes positioning and shimming the first two legs at the 4 o'clock position and 8 o'clock position, and installing the third leg at the 12 o'clock position.
    Type: Application
    Filed: October 14, 2003
    Publication date: April 22, 2004
    Applicant: J.E. Baker Company
    Inventors: Ronald J. Marr, Larry E. Shultz
  • Patent number: 6705859
    Abstract: A grizzly bar device for a rotating kiln having an annular array of bars having at least two adjacent bars, wherein the thickness the bars is reduced in lateral and radial directions, and gap between the adjacent bars increases in width as the bars extend laterally from front to back of the bar and extend radially inward of the kiln. Another taper on a front face of the bars provides a cutting corner on each bar.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: March 16, 2004
    Assignee: Andritz Inc.
    Inventor: Royce G. McCarty
  • Patent number: 6688884
    Abstract: Rotary kiln heat exchangers having precast hub and leg assemblies are disclosed. The hub and leg assemblies include interlocking features which secure the heat exchanger components together. A method of installing such heat exchangers in rotary kilns is also disclosed. Installation is relatively fast and simple, and the heat exchangers are capable of withstanding the harsh operating conditions of rotary kilns for extended periods of time.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: February 10, 2004
    Assignee: Harbison-Walker Refractories Company
    Inventors: John Thibault, John Stephansky, John N. Snyder
  • Patent number: 6685465
    Abstract: A rotary drum heater for mixing asphalt with a hot gas introduced into the drum by gas burners is disclosed. The drum has an inlet opening for material to enter the drum to be processed and an outlet opening for material to exit. The hot gas is blown into the interior of the drum and is diverted by a hot gas conduit segment that is designed to gently heat the asphalt.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: February 3, 2004
    Inventor: Dieter Marquardt
  • Publication number: 20030228551
    Abstract: Rotary kiln heat exchangers having precast hub and leg assemblies are disclosed. The hub and leg assemblies include interlocking features which secure the heat exchanger components together. A method of installing such heat exchangers in rotary kilns is also disclosed. Installation is relatively fast and simple, and the heat exchangers are capable of withstanding the harsh operating conditions of rotary kilns for extended periods of time.
    Type: Application
    Filed: June 6, 2002
    Publication date: December 11, 2003
    Applicant: Harbison-Walker Refractories Company
    Inventors: John Thibault, John Stephansky, John N. Snyder
  • Patent number: 6638062
    Abstract: An axially rotatable materials handling apparatus for handling a mixture of solid particulate and water, includes a heater mounted on the housing that can transfer heat to the mixture to prevent or thaw frozen water inside the apparatus. The heater can be a combustible fuel heater or an electric heater. The apparatus is particularly useful in winter weather to prevent water from freezing inside the apparatus or to thaw any frozen water already present.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: October 28, 2003
    Inventor: Michael P. Davidson
  • Publication number: 20030165788
    Abstract: A grizzly bar device for a rotating kiln having an annular array of bars having at least two adjacent bars, wherein the thickness the bars is reduced in lateral and radial directions, and gap between the adjacent bars increases in width as the bars extend laterally from front to back of the bar and extend radially inward of the kiln. Another taper on a front face of the bars provides a cutting corner on each bar.
    Type: Application
    Filed: February 27, 2003
    Publication date: September 4, 2003
    Inventor: Royce G. McCarty
  • Patent number: 6474985
    Abstract: A rotary kiln for pyroprocessing particulate material includes a cylindrical kiln shell supported for rotation about a longitudinal central axis. The kiln has a plurality of circumferentially spaced peripheral openings provided in the kiln shell near its exit end for discharging pyroprocessed particulate material therethrough. A raised grate disposed over each discharge opening has a generally convex geometric profile that projects into the interior of said kiln shell.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: November 5, 2002
    Assignee: Metso Minerals Industries, Inc.
    Inventors: Samuel A. Miller, Thomas H. Luepke, Jr.
  • Patent number: 6447289
    Abstract: A support stand for supporting an elongated rotary drum for rotation about a longitudinally extending drum axis includes a lower portion extending upwardly from a base to a tilted top extending in a plane of tilt; a correspondingly tilted upper portion mounted atop the lower portion, and a carrying roller rotatably mounted on the upper portion for rotation about a roller axis while a riding ring extending coaxially around the drum bears against and rides in rolling contact on the roller. The upper portion is rotatably positionable relative to the lower portion about a skew axis perpendicularly intersecting the plane of tilt at a fixed point. The skew axis substantially radially intersect the drum axis. As well, the skew axis substantially radially intersects the roller axis. A mechanism for adjusting the amount of skew and an indicator for displaying the amount of skew are also disclosed.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: September 10, 2002
    Inventors: Jeffery Franklin Boyne, Donavan Roy Larsen
  • Patent number: 6371757
    Abstract: A kiln fuel system and method for producing cement. The system includes a tank for storing a fuel and a suction heater for drawing and preheating the fuel from the tank. A pressure station pressurizes the preheated fuel and a heater heats the preheated and pressurized fuel. A burner receives the fuel from the heater and ignites the fuel to form a flame and heat the concrete. The fuel is preferably a bitumen/water fuel mixture. A burner valve train is provided for regulating an amount and mixture of fuel and air supplied to the burner, preventing the flow of fuel to the burner upon detection of a predetermined condition, regulating an amount of heated and pressurized fuel supplied to the burner and providing a source of pressurized air for controlling a size of the flame produced by the burner. A slop tank is connected to the tank for receiving the fuel upon detecting a temperature of the fuel is above a predetermined value in the suction heater or above a predetermined pressure in the pressurizing station.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: April 16, 2002
    Inventor: Fred L Broome-Webster
  • Patent number: 6365518
    Abstract: Methods for processing a substrate are disclosed. In one embodiment of the invention, a substrate with a first layer and an oxide layer on the substrate is placed in a processing chamber. The oxide layer is removed while the substrate is at a first temperature in the processing chamber. A second layer is then formed on the first layer while the substrate is at a second temperature in the processing chamber.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: April 2, 2002
    Assignee: Applied Materials, Inc.
    Inventors: Albert Lee, Chris Ngai, Christopher Bencher, Tom Nowak
  • Publication number: 20010034003
    Abstract: A method or an arrangement for making the fired-material discharge stream from a rotary kiln more uniform upstream of a cooler is distinguished by the fact that at least some of the fired material is conveyed out of the coarse-material discharge region (5) toward the fine-material discharge region (4) and/or at least some of the fired material is conveyed out of the fine-material discharge region (5) toward the coarse-material discharge region (5) before it reaches the cooler.
    Type: Application
    Filed: April 23, 2001
    Publication date: October 25, 2001
    Inventor: Hans-Peter Wellmann
  • Publication number: 20010026912
    Abstract: A trefoil for a rotary kiln is provided that has at least three spoke-like refractory legs. Each one of the legs extends radially outwardly from a center of the trefoil; spans approximately from the kiln shell to the center of the kiln; is pre-formed outside of the kiln for installation as a single-leg unit; and has a mating surface that preferably is uniform and even, thereby lacking interlocking features. The mating surfaces of the legs abut one another at the kiln center to provide mutual support. An alignment member, such as a pair of longitudinal angles, are welded to the kiln shell to position the legs. A corresponding method of installing the trefoil is disclosed that includes positioning and shimming the first two legs at the 4 o'clock position and 8 o'clock position, and installing the third leg at the 12 o'clock position.
    Type: Application
    Filed: June 5, 2001
    Publication date: October 4, 2001
    Applicant: J.E. Baker Company
    Inventors: Ronald J. Marr, Larry E. Shultz
  • Patent number: 6279492
    Abstract: A method of burning tires in a horizontally rotating combuster includes the steps of loading the tires into a rotating combustion chamber through a traveling air lock and burning them until they are reduced to ash; enhancing combustion by tumbling the burning tires in a tapered rotating chamber while adding preheated draft air; controlling the intake draft air using thermal expansion of the rotary combustion chamber to activate the draft control valve; advancing the residual ash with each successive revolution of the combustion chamber by use of angled flights on the inner surface of the chamber to an afterburner for completion of the combustion and disposal of the ash.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: August 28, 2001
    Assignee: Atlantic Pacific Energy Systems, Inc.
    Inventors: Jack B. Larson, James C. Branscome
  • Patent number: 6257878
    Abstract: A trefoil for a rotary kiln is provided that has at least three spoke-like refractory legs. Each one of the legs extends radially outwardly from a center of the trefoil; spans approximately from the kiln shell to the center of the kiln; is pre-formed outside of the kiln for installation as a single-leg unit; and has a mating surface that preferably is uniform and even, thereby lacking interlocking features. The mating surfaces of the legs abut one another at the kiln center to provide mutual support. An alignment member, such as a pair of longitudinal angles, are welded to the kiln shell to position the legs. A corresponding method of installing the trefoil is disclosed that includes positioning and shimming the first two legs at the 4 o'clock position and 8 o'clock position, and installing the third leg at the 12 o'clock position.
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: July 10, 2001
    Assignee: J. E. Baker Company
    Inventors: Ronald J. Marr, Larry E. Shultz
  • Patent number: 6244859
    Abstract: A rotary kiln (1) is equipped with a horizontal kiln drum (3), arranged rotatable and drivable in a furnace body (2), which kiln drum is closed at the charging and delivery side by end plates (4, 5) forming central charging or delivery openings (6, 7), respectively, and which can be heated from outside via a heating chamber (15) surrounding the drum shell and admitted with heating medium. To achieve a simple and solid drum construction at a good thermic efficiency, the kiln drum (3) consists of U-sections (18) arranged side by side along the drum circumference between the end plates (4, 5), which point radially inward with their open section side, and which are interconnected longitudinally in the touching end zones (19) of the section limbs (20), and along the circumference via reinforcing elements (23), having an axial distance to each other, bridging the remaining longitudinal gaps (21) between the section webs (22).
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: June 12, 2001
    Inventor: Franz Ragailler
  • Publication number: 20010002308
    Abstract: A revolving drum containing a rolling element is provided that includes a member for the cleaning of the inner wall areas of the revolving drum which has at least two cleaning zones. The cleaning zones include projecting cleaning elements and lie in tandem in an axial direction of the revolving drum. They include a fastening apparatus disposed on a front end pointing toward the infeed side of the drum and include a revolving articulation by which the rolling element can be fastened to a non-revolving component of a head of the revolving drum. The cleaning zones comprise generated surfaces of the revolving drum which are at an angle to one another.
    Type: Application
    Filed: December 27, 2000
    Publication date: May 31, 2001
    Applicant: Veba Oel Technologie Und Automatisierung GmbH
    Inventors: Andreas Schleiffer, Peter Wenning
  • Patent number: RE44612
    Abstract: Rotary kiln heat exchangers having precast hub and leg assemblies are disclosed. The hub and leg assemblies include interlocking features which secure the heat exchanger components together. A method of installing such heat exchangers in rotary kilns is also disclosed. Installation is relatively fast and simple, and the heat exchangers are capable of withstanding the harsh operating conditions of rotary kilns for extended periods of time.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: November 26, 2013
    Assignee: Harbison-Walker Refractories Company
    Inventors: John Thibault, John J. Stephansky, John N. Snyder
  • Patent number: RE45360
    Abstract: Rotary kiln heal exchangers having precast hub and leg assemblies are disclosed. The hub and leg assemblies include interlocking features which secure the heat exchanger components together. A method of installing such heat exchangers in rotary kilns is also disclosed. Installation is relatively fast and simple, and the heat exchangers are capable of withstanding the harsh operating conditions of rotary kilns for extended periods of time.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: February 3, 2015
    Assignee: Harbison-Walker Refractories Company
    Inventors: John Thibault, John J. Stephansky, Jack Smaroff