Having Brick-type Lining Patents (Class 432/119)
  • Patent number: 8967998
    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: Grant
    Filed: May 5, 2011
    Date of Patent: March 3, 2015
    Assignee: Magnesita Refractories Company
    Inventor: Joel R. Filius
  • Publication number: 20140295368
    Abstract: The invention relates to a refractory material for use in different parts of rotary furnaces, having a composition of minerals defined as a percentage by weight of sintered mullite or andalusite or sintered alumina or fused alumina or electrocast alumina-zirconium of between 30 and 80%, a percentage by weight of silicon carbide of between 5 and 15%. The material is used as a lining in rotary furnaces, for the precalciner, the smoke chamber, the furnace inlet, the burning area, the safety area, the furnace outlet area and the cooler.
    Type: Application
    Filed: October 11, 2012
    Publication date: October 2, 2014
    Applicant: REFRACTARIA, S.A.
    Inventors: Carlos Omar Suarez Alvarez, Jose Louis Pena Vazquez
  • Publication number: 20140065565
    Abstract: Provided is a method of producing a composite metal oxide including, to calcine a composition containing an alkali metal and obtain a composite metal oxide, calcining the composition while being arranged on a mount a part of which in contact with the composition is formed of a metal oxide component. The metal oxide component has a content of K atoms ranging from 5 to 13 parts by weight in terms of K2O with respect to 100 parts by weight of the metal oxide component, and a total content of Al atoms, Zr atoms, Mg atoms, and Ce atoms ranging from 15 to 70 parts by weight in terms of oxides with respect to 100 parts by weight of the metal oxide component. The present invention thus provides a method of producing a composite metal oxide containing an alkali metal with reduced production costs.
    Type: Application
    Filed: April 19, 2012
    Publication date: March 6, 2014
    Applicant: TOHO MATERIAL CO., LTD.
    Inventors: Naomichi Hori, Mikio Nakashima
  • Patent number: 8627776
    Abstract: Retainers for holding a refractory ceramic fiber insulation layer in a furnace, kiln, or forge are in the form of ceramic tile members is formed with an array of small hook structures on an inward-facing surface, which serves as the hook component of a hook-and-loop fastening system. The ceramic fibers of the insulating layer serve as the “loop” component. The tile members may be formed in a RAM press, or the hook structure can be formed using a slurry spread with refractory grains or particles.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: January 14, 2014
    Assignee: Seneca Ceramics Corp.
    Inventor: Chad A. Scheckler
  • 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: 20090311644
    Abstract: A method for treating lime mud, in which method the lime mud is conveyed to a lime kiln, where fuel gas is used as fuel, which fuel gas is formed by a circulating fluidized bed gasifier. A calcium compound is used as bed material in the gasifier. In addition, the invention relates to the use of a calcium compound in a lime mud treatment plant, as well as to a lime mud treatment plant.
    Type: Application
    Filed: June 15, 2009
    Publication date: December 17, 2009
    Applicant: Metso Power Oy
    Inventors: Juhani Isaksson, Kari Kuukkanen
  • Patent number: 6802709
    Abstract: A rotary kiln for pyro-processing a variety of materials, such as cement, lime, lime sludge, clay, shale, refractory grains, bauxite, garbage and minerals, that includes a continuously-rotated, cylindrical steel shell, having a feed end for receiving material, a processing zone through which high temperature gases circulate and where the material is processed, and a discharge end where the material leaves the kiln. In addition, the feed end of the kiln being more elevated than the discharge end so as to force material flow during kiln rotation. The shell includes an inner cylindrical surface and defines a longitudinal axis extending from the feed end to the discharge end. In addition, the inner cylindrical surface includes a contiguous insulating refractory lining comprised of hollow bricks, and a work refractory lining concentric with and over the insulating lining. The linings are disposed annularly about the open processing zone.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: October 12, 2004
    Assignee: Reframerica INC
    Inventor: Ricardo Araujo Mosci
  • 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
  • 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: 6309211
    Abstract: A rotary kiln includes a novel air conveying system for delivering a supply of port air beneath the material bed of feed stock passing through the interior of the kiln. The air conveying system includes an air inlet port disposed in the shell of the kiln, a main air conveying channel which communicates with the air inlet port, and a plurality of air vent channels communicating with the main air conveying channel and the interior chamber of the kiln. The main air conveying channel is formed integrally in the refractory bricks which line the inner surface of the kiln shell and extends longitudinally and parallel to the rotary axis of the kiln. The air vent channels extend through the refractory bricks substantially radially with respect to the rotary axis of the kiln.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: October 30, 2001
    Assignee: Suedala Industries, Inc.
    Inventors: Neil R. Dock, Edward T. Maciejewski
  • 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
  • Patent number: 5984672
    Abstract: A ceramic fiber block includes a welding stud disposed between two ceramic fiber layers centrally positioned in the ceramic fiber block. The welding stud includes a base stud which at its one end to be welded to a furnace wall and having a ceramic ferrule and at the other end formed with screw threads, an electrode rod having screw threads at its one end in the ceramic fiber block, and first and second nuts connecting the screw threaded ends of the base stud and electrode rod.
    Type: Grant
    Filed: October 21, 1998
    Date of Patent: November 16, 1999
    Assignee: Taki Industries Co., Ltd.
    Inventor: Seiichi Takigawa
  • Patent number: 5873714
    Abstract: A kiln for pyro-processing a variety of materials, such as cement, lime, lime sludge, clay, shale, magnesite, dolomite, and other minerals, includes a continuously-rotated, cylindrical, elongated shell having a feed end for receiving the material, a processing zone through which high temperature gases circulate and where the material is processed, and a discharge end where the material leaves the kiln. The shell includes an inner cylindrical surface and defines a longitudinal axis extending from the feed end to the discharge end. In addition, a portion of the inner cylindrical surface includes a lining secured contiguous to the inner cylindrical surface. The lining has an inner face in the shape of a continuous sinusoidal wave with a predetermined amplitude and wavelength.
    Type: Grant
    Filed: March 3, 1997
    Date of Patent: February 23, 1999
    Assignee: Reframerica, Inc.
    Inventor: Ricardo A. Mosci
  • Patent number: 5775901
    Abstract: An insert for an ultrasonic scaling instrument includes an elongated body. A plastic gripping collar surrounds the insert near one of the ends. A fluid input port is on an end of the collar. An internal conduit extends between the fluid flow input port through the plastic collar to a fluid flow output channel. A metal fluid flow output conduit is rigidly clamped by the collar into a portion of the fluid flow output channel. An output end of the conduit is directed toward an adjacent scaling tip carried by the insert. The fluid from the conduit is directed onto a portion of the scaling tip. Depending on fluid flow pressure, part of the fluid can be directly scattered thereby, and part of the fluid can flow along the tip to an end thereof and then be scattered at the end. The collar provides a rigid coupling between the conduit and the body portion so that vibrations of the body portion do not alter the relative position of the output conduit relative to the tip.
    Type: Grant
    Filed: March 7, 1996
    Date of Patent: July 7, 1998
    Assignee: Hu-Friedy Mfg. Co., Ltd.
    Inventor: Anthony T. Riso
  • Patent number: 5704782
    Abstract: A wear lining for a rotary furnace of an incineration installation for, for example, chemical waste, wherein the wear lining comprises tapered bricks (1, 2, 3) which are installed in the furnace in the form of a vaulted lining, the main taper of each brick being matched to the desired vaulted lining shape, and wherein the height (H) of the bricks extends in the thickness direction of the lining. In this lining the bricks are of low porosity and able to withstand high temperatures and chemicals. Furthermore, the bricks have an additional taper which extends at least over part (h) of the height thereof, which additional taper provides, on the inside (9) of the lining, an increase in the gap width (T1) between adjoining bricks which decreases towards the outside of the lining. Preferably, the additional taper is such that, in the cold assembled state, the increase in the gap width (T1) on the inside of the lining is in the range from 1 mm to 2.4 mm. The additional taper extends over 0.1 to 0.
    Type: Grant
    Filed: May 8, 1996
    Date of Patent: January 6, 1998
    Assignee: N.V. Gouda Vuurvast
    Inventors: Joachim Otto Schulze, Johannes Adrianus Maria Butter
  • Patent number: 5704781
    Abstract: The invention relates to a cuboidal, fireproof wall brick for a heating channel of an open round-chamber kiln, having two horizontally extending setting surfaces, two vertically extending setting surfaces and two front surfaces, characterized by at least one bead-like recess in the region of at least one setting surface, the recess extending from one front surface to the opposite front surface.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: January 6, 1998
    Assignee: Riedhammer GmbH and Co. KG
    Inventor: Reiner Swoboda
  • Patent number: 5702247
    Abstract: A rotary reactor is shown having an improved internal lining including a lifter section which extends along an interior surface of the reactor chamber for lifting material from a lower portion of the chamber to an upper portion thereof as the chamber rotates. The lifter section is formed as a monolithic casting of a refractory material having a polygonal cross-section which includes a series of blunt faces alternating with a series of slanted faces. The slanted faces are aligned with a direction of rotation of the reactor such that the slanted faces of the refractory material first contact the material being lifted.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: December 30, 1997
    Assignee: Chemical Lime Company
    Inventor: William H. Schoof
  • Patent number: 5695329
    Abstract: A rotary kiln apparatus including an outer kiln shell defining an interior heating chamber therein for receiving material for heating which preferably includes a rotational drive for rotating the kiln, and a plurality of refractory bricks movably positioned within the chamber in order to maintain heat within the chamber where the refractory bricks are movable and in abutment with respect to one another to accommodate thermal expansion during heating and to maintain enhanced heating within the interior heating chamber with an outer liner insulation included extending about the inside of the outer kiln shell and in abutment therewith providing thermal insulation between the outer kiln shell and the refractory brick members with a metallic intermediate liner mechanically affixed to the inner side of the outer liner insulation to extend thereover to prevent abrasion of the outer liner insulation during normal movement of the refractory brick members during kiln rotation, with mechanical affixing of the intermedia
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: December 9, 1997
    Inventor: Jeffrey W. Orcutt
  • Patent number: 5623883
    Abstract: An improved kiln for the calcination of a powder comprises a directly heated rotary kiln in which at least a part of the inner circumferential wall is equipped with a plurality of protrusions. The protrusions are shaped so that the powder is substantially not lifted during operation of the kiln. In a preferred embodiment the protrusions have the shape of a triangular prism and are positioned within the kiln so as to pass through the powder in the manner of a plough. Preferably the top face of the prism is an isosceles triangle in which the equal angles are greater than the angle of repose of the powder for which the kiln is designed.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: April 29, 1997
    Assignee: Tioxide Group Services Limited
    Inventors: John F. Davidson, Kevan R. Reilly
  • Patent number: 5616023
    Abstract: A rotary kiln having a polygonal lining is disclosed for pyro-processing cement, lime, other minerals, as well as other materials. Specifically, utilizing a polygonal lining of brick or a refractory or ceramic material having between 3 and 12 sides improves the heat efficiency or heat transfer between high-temperature gases and a burden of material to be processed by the kiln. Such an efficient utilization of the gas heat is due to various factors which cause a larger amount of the burden to be more quickly exposed to the high temperature gases. These various factors include increased tumbling, increased residence time, decreased degree of filling, and increased surface exposure.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: April 1, 1997
    Assignee: Quigley Company, Inc.
    Inventor: Ricardo A. Mosci
  • Patent number: 5460518
    Abstract: A rotary kiln having a polygonal lining is disclosed for pyro-processing cement, lime, other minerals, as well as other materials. Specifically, utilizing a polygonal lining of a refractory or ceramic material having between 3 and 12 sides improves the heat efficiency or heat transfer between high-temperature gases and a burden of material to be processed by the kiln. Such an efficient utilization of the gas heat is due to various factors which cause a larger amount of the burden to be more quickly exposed to the high temperature gases. These various factors include increased tumbling, increased residence time, decreased degree of filling, and increased surface exposure.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: October 24, 1995
    Assignee: Quigley Company, Inc.
    Inventor: Ricardo A. Mosci
  • Patent number: 5330351
    Abstract: The invention discloses a multichambered structure for a rotary kiln.At least three bases are formed from radial blocks equidistantly spaced about and adjustably attached at one surface thereof to the inner surface of the steel shell, each base extending axially along the steel shell and on the surface opposite the attachment having a profile therein for accepting spoke blocks. The chamber walls are formed from spoke blocks with each of the walls extending radially from one of the bases and axially along the length of the base to the center portion of the cylindrical body. The spoke blocks are specially configured with one side thereof having a profile complementary to the radial blocks for mating therewithin and the side opposite thereof a profile for accepting additional ones of the spoke bricks. Additionally, a hub assembly formed from specially configured hub segments interlocks with the spoke bricks of the three walls and extends axially along the centralmost portion of the walls.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: July 19, 1994
    Assignee: RRI, Inc.
    Inventors: George E. Ransom, Jr., George E. Ransom, III, Ralph Ingerson, Jr.
  • Patent number: 5299933
    Abstract: A rotary kiln having a polygonal lining is disclosed for pyro-processing cement, lime, other minerals, as well as other materials. Specifically, utilizing a polygonal lining of brick or a refractory or ceramic material having between 3 and 12 sides improves the heat efficiency or heat transfer between high-temperature gases and a burden of material to be processed by the kiln. Such an efficient utilization of the gas heat is due to various factors which cause a larger amount of the burden to be more quickly exposed to the high temperature gases. These various factors include increased tumbling, increased residence time, decreased degree of filling, and increased surface exposure.
    Type: Grant
    Filed: December 24, 1991
    Date of Patent: April 5, 1994
    Assignee: Quigley Company, Inc.
    Inventor: Ricardo A. Mosci
  • Patent number: 5217367
    Abstract: A heating drum for receiving a printing blanket to be vulcanized in a pressure chamber is comprised of a hollow drum body formed of a thin drum wall having a separating slot that extends parallel to the axis of the drum body. The drum body is hollow and made of a thin wall in order to reduce pressure tensions within the printing blanket coil during vulcanization. The separating slot is covered by a sheet metal tongue which is connected with one side to the thin wall along the separating slot while the oppositely arranged free end rests in a pre-stressed manner on the outer mantle surface of the drum body.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: June 8, 1993
    Assignee: Continental Aktiengesellschaft
    Inventor: Gunter Sporing
  • Patent number: 5033959
    Abstract: A rotary kiln assembly has steel plates lining the kiln are mounted on hangers projecting through the plates and overlie an insulation layer.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: July 23, 1991
    Assignee: J. O. Bernt & Associates Limited
    Inventors: Jorgen O. Bernt, Barry C. Forster, Allan J. Blain
  • Patent number: 4988290
    Abstract: An internal combustion engine having combustion chambers with ceramic linings. These ceramic linings have webs between inner and outer surfaces for forming sealed cavities therein.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: January 29, 1991
    Assignee: Forschungszentrum Julich GmbH
    Inventors: Siegfried Forster, Peter Quell
  • Patent number: 4978294
    Abstract: This invention aims to offer an external heating rotary furnace for indirectly heating materials such as ore, coke, etc. which are liable to be oxidized, by insulating then from an oxidixing combustion gas atmosphere. The furnace comprises the following members: are reaction chamber (5) in which materials are heated to high temperature, defined by heat resistant ceramic means 4 from the combustion chamber (10) in which the fuel burns out.The fuel burns out in the combusion chamber, and combustion gas does not pass through the reaction chamber (5). Materials to be treated are heated indirectly in the reaction chamber (5) through the insulating ceramic wall (4).According to this invention, materials to be treated can be heated indirectly over 1,400.degree. C. effectively isolated from the combustion gas atmosphere, and inexpensive fuel can be used. Particularly, this invention is useful for the reduction of ores.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: December 18, 1990
    Assignees: Tosera Engineering Co., Ltd., Showa Denko Kabushiki Kaisha, Shunan Denko Kabushiki Kaisha
    Inventors: Tadashi Uemura, Shirou Hayashi
  • Patent number: 4975049
    Abstract: A refractory block assembly for the nose ring of a rotary kiln. Self-aligning nuts contained in recesses of a refractory casting generally align with bolts radially extending through holes spaced around the periphery of a retainer in the nose ring. The nuts and recesses are sized and configured to permit limited lateral and rotational displacement of the nut for threadingly engaging the bolts.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: December 4, 1990
    Assignee: General Refractories Company
    Inventors: Howard L. Roenigk, Peter R. Frazier, Richard C. Lipp
  • Patent number: 4960058
    Abstract: A self-positioning refractory structure having a generally cylindrical casing. A plurality of positioning refractories, a plurality of filler refractories and a plurality of wedge refractories are interlocked with respect to each other and positioned to form a structure having a curved cross section within the cylindrical casing. The positioning, filler and wedge refractories are interlocked with respect to each other. The length of each positioning refractory is greater than the length of each filler and wedge refractories thus defining an annular space between the casing wall and the refractories. Each positioning refractory has a cold end in positioning and supporting contact with an inside wall of the casing and a hot end directed toward a center of the self-positioning refractory structure.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: October 2, 1990
    Assignee: Merkle Engineers, Inc.
    Inventor: William R. Materna
  • Patent number: 4952147
    Abstract: A kiln for reclaiming quick lime from calcium carbonate sludge formed in the production of cooking liquors in a wood pulping process for the production of paper. The kiln provides increased output with lower energy input due to: measurement and control of oxygen content in the kiln; non-air mixing burner; castable refractory liner with tumbler ribs; a heat transferring chain system; and a variable speed exhaust fan and air flow control. The output of the kiln was increased by more than ten percent along with a forty-five percent improvement in energy efficiency at substantial cost reduction due to its efficient use of energy.
    Type: Grant
    Filed: October 1, 1986
    Date of Patent: August 28, 1990
    Assignee: Champion International Corporation
    Inventors: John W. Boyden, II, James F. Schooling, Jr.
  • Patent number: 4846677
    Abstract: A buttress (52) for buttressing an axial end (34) of a partition (36) in a multiple-chamber heat exchanger (28) comprises an integral solid cast from a refractory material. A thick axial end (55) of the solid is provided for compressive engagement with an end (34) of the partition (36). A thin axial end (56) opposite the thick end (55) is provided for compressive engagement to a kiln shell liner (54). A radially outer surface (77) engages an inner surface (14) of the kiln shell (12). A radially inner surface (58) of the buttress (52) slopes generally from the thick end (55) to the thin end (56), such that compressive force exerted on the thick end by the partition (36) is transmitted through the buttress (50) to a liner (54) of the kiln shell (12).
    Type: Grant
    Filed: August 11, 1988
    Date of Patent: July 11, 1989
    Assignee: Dresser Industries, Inc.
    Inventors: Raymond J. Crivelli, Roger Snellman
  • Patent number: 4676740
    Abstract: Heat exchange apparatus is provided for use in a rotary kiln having a bed therein for introducing thermal energy directly into central portions of the bed without lifting or tumbling thereof. In this manner, efficient heat transfer is effected from hot upper portions of the kiln to within central portions of the bed without causing significant dust generation which results in unwanted loss of heat and raw materials from the kiln. A plurality of tubular refractory members are held in a spaced apart relationship with the rotary kiln wall which are heated in the upper portions of the kiln and cooled as they pass through the bed when the kiln is rotated.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: June 30, 1987
    Inventor: Anthony J. deBeus
  • Patent number: 4569659
    Abstract: The invention relates to a lining for a furnace (1). The lining consists of pre-fabricated refractory ceramic anchoring elements (6, 7, 14), containing the fastening irons necessary for attaching the lining to the sheet mantle (5) and a refractory ceramic casting mass (8) between the anchoring elements for forming a monolithic lining. When relining the furnace the removal of the old lining is facilitated by first rupturing the anchoring elements.
    Type: Grant
    Filed: November 4, 1982
    Date of Patent: February 11, 1986
    Assignee: Hoganas AB
    Inventors: Erik T. Olsen, Ingvar G. A. Blom
  • Patent number: 4543893
    Abstract: A lining brick for forming a refractory lining includes a hot side surface, a shell side surface opposite the hot side surface, a pair of spaced opposite hearing surfaces, a pair of spaced opposite butt surfaces, and recesses opening onto the shell side surface. The recesses are formed only in the spaced opposite bearing surfaces or in the spaced opposite butt surfaces. Each recess has a first side opening onto the shell side surface and a second side opening onto the respective butt or bearing surface. Each recess is defined by a surface portion having a first end terminating at the shell side surface and a second end terminating at the respective butt or bearing surface. The total area of the first ends of all of the recesses that lie in the plane of the shell side surface is less than the area of the shell side surface.
    Type: Grant
    Filed: April 26, 1984
    Date of Patent: October 1, 1985
    Assignee: Didier-Werke AG
    Inventor: Manfred Kunnecke
  • Patent number: 4543061
    Abstract: The feed end dam of a rotary kiln is cooled by air directed into an annulus between the feed end dam and a seal mechanism.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: September 24, 1985
    Assignee: Conoco Inc.
    Inventor: Don L. Edwards
  • Patent number: 4475886
    Abstract: An improved lifter for a rotary kiln is made by extending the internal reinforcement all the way to the inner face of the lifter and by locating the junction between the branches and the main stem of the lifter closer to the metal shell of the rotary kiln than is the hot, inner face of the refractory lining adjacent to the lifter.
    Type: Grant
    Filed: March 1, 1983
    Date of Patent: October 9, 1984
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventor: Gary A. Tyler
  • Patent number: 4418893
    Abstract: The metal shell of a furnace or cupola is cooled by means of water flowing down over the exterior surface of the metal shell. In order to reduce heat loss and thus decrease the energy consumption, the interior surface of the metal shell is lined with a fired refractory shape. The thermal conductivity of the refractory material and its thickness are selected such that the amount of refractory material remaining upon reaching equilibrium conditions will be sufficient to maintain the mechanical and structural integrity of the lining. Refractory materials of different conductivities may be selected for various locations in the furnace depending upon the temperatures to be encountered.
    Type: Grant
    Filed: December 16, 1981
    Date of Patent: December 6, 1983
    Assignee: Combustion Engineering, Inc.
    Inventors: John A. Middleton, Thomas L. O'Dwyer
  • Patent number: 4370128
    Abstract: A protective device for a discharge end of a tubular rotary kiln comprises a flange extending radially outwardly of the metal kiln shell, a metallic ring affixed to the flange and arranged concentric with the shell at the discharge end, and a refractory ring covering the metallic ring and the front face of the flange. Two sleeves concentrically surrounding the external surface of the metal shell to define respective inner and outer annular chambers through which cooling air is circulated to cool the rear face of the flange, a space between the metallic ring and the internal surface of the metal shell communicating with the outer annular chamber through a passage between the rear face of the flange and the discharge end, and with the inner annular chamber through a port in the metal shell spaced inwardly of the discharge end.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: January 25, 1983
    Assignee: Fives-Cail Babcock
    Inventors: Alain Chielens, Bernard Boussekey, Bernard Deschamps
  • Patent number: 4341514
    Abstract: An apparatus is disclosed for securing a two component lining to the inside shell of a rotary kiln or the like. The apparatus includes a plurality of standoffs each having a bottom portion for connection to the inside shell of the kiln, a middle portion, and a top portion. A grid is connected to each of the top portions by means of a weld. A layer of a lightweight first castable material having high insulative properties is gunned or cast along the inside shell of the kiln to a depth less than the height of the standoffs. A second castable material having abrasion resistive properties is gunned or cast onto the surface of the first castable material at a depth substantially level with the surface of the grid. The standoffs serve as an anchor to secure the two layers of castible material into position . The grid connected to the top portion of the standoffs is preferably a honeycomb grid which aids the second castable material in protecting the first castable material from damage due to abrasion.
    Type: Grant
    Filed: November 25, 1980
    Date of Patent: July 27, 1982
    Inventor: Douglas G. Shanks
  • Patent number: 4340360
    Abstract: The present invention relates to a fire brick for a rotary kiln, provided on one or both large surface area portions with at least one concavity extending in the radial direction of the kiln, and opening on at least the face.The present invention further relates to a fire brick for a rotary kiln as described above, further provided with a steel plate having a concavity of dimensions which the sum of the depth of the concavity of said brick plus an expansion absorbing tolerance, and applied to a maximum surface area and lying over the concavity.The present invention still further relates to a fire brick for a rotary kiln as described above, further provided with board or asbestos, etc., on the face end of the steel plate.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: July 20, 1982
    Assignees: Veitscher Magnesitwerke-Aktiengesellschaft, Shinagawa Refractories Co., Ltd.
    Inventors: Fritz Hoedl, Morihiro Kimura, Yoshio Yasuda
  • Patent number: 4295825
    Abstract: This invention concerns a system for the protection of the delivery end of a rotary kiln.This system is characterized by the fact that it consists of a refractory concrete ring covering the internal surface of the end of the kiln shell and the front surface of a flange attached to the outside of the end of the shell, the ring being fastened to the shell and the flange by anchorage units fixed on them.The invention can be used in the cement production and minerals processing industries.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: October 20, 1981
    Assignee: Fives-Cail Babcock
    Inventors: Alain Chielens, Bernard Boussekey
  • Patent number: 4289479
    Abstract: A wear-resistant, thermal protective, annular liner for a rotary kiln and an attendant method of making the same. The liner includes a series of elongate, axially aligned, annular composite liner sections, each of which comprises a layer of lightweight insulation material formed by side-by-side longitudinal rows of thermal insulating blocks positioned against the interior surface of the metal cylindrical wall of the kiln, with anchor brackets secured to the kiln wall and extending through respective openings in the insulating blocks and embedded in a relatively thicker and heavier layer of refractory material overlying the layer of insulation material, and wherein column portions of the refractory material project inwardly from the layer of refractory material and through the openings in the insulating blocks and in surrounding relation to the inner portions of the anchor brackets for supporting the layer of refractory material and preventing crushing the insulation material.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: September 15, 1981
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4266931
    Abstract: The rotary combustion bed has a rotary drum with a permeable refractory lining through which air is blown during rotation of the drum and cascading of a charge of material in the drum. The air blown into the drum can be controlled to blow through various angular sections of the drum.
    Type: Grant
    Filed: February 1, 1979
    Date of Patent: May 12, 1981
    Inventor: Holger Struckmann
  • Patent number: 4029464
    Abstract: The kiln comprises a slowly rotating drying-kiln section and a relatively quickly rotating kiln-section, a transition zone being arranged in the middle of the kiln. The transition zone comprises shovel-shaped bricks and intermediate bricks. The shovel-shaped bricks comprise projecting portions provided with especially shaped surfaces.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: June 14, 1977
    Assignee: Leca Trading & Concession A/S
    Inventor: Harry Kamstrup-Larsen
  • Patent number: 4015929
    Abstract: A rotary kiln for producing an expanded clay product from clay or clay slate, the kiln having a lining provided with ribs. These ribs are built of refractory bricks partly reinforced. Each brick is preferably constituted by two portions, one of which is provided with reinforcing bars extending within and protruding from said portion. The protruding bars serve as guide for the second brick portion during the securing of the two brick portions to each other. The advantage of such a rib construction is that it allows an easy and cheap restoration of the rib when part of the rib is worn down without simultaneously necessitating a replacement of the lining.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: April 5, 1977
    Assignee: Leca Trading & Concession A/S
    Inventor: Harry Kamstrup-Larsen
  • 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