Abstract: A kiln includes a stage, a stove, a gas supply assembly, and a combustion device wherein, the stage includes a stage body and a carrier member. The stage body has a first chamber, while the carrier member is detachably disposed at the stage body. The stove is joined to the stage body and has an entry and a second chamber. The gas supply assembly is disposed at the stage body, and part of the gas supply assembly is located in the first chamber. The combustion device is located in the second chamber. The carrier member can be detached from the stage body and be moved out of the stove from the entry so that the first chamber communicates with the second chamber. In this way, the working space inside the kiln can be increased, which is convenient for users to repair and maintain the gas supply assembly or the combustion device.

Abstract: A system and method for repairing a coke oven having an oven chamber formed from ceramic bricks. A representative system includes a insulated enclosure insertable into the oven chamber and includes removable insulated panels that define an interior area for workers to work in. The insulated enclosure is movable between an expanded configuration and a compact configuration and moving the enclosure to the expanded configuration will decrease the distance between the insulated enclosure and the walls of the oven chamber. Removing the panels exposes the ceramic bricks and allows workers within the interior area to access and the bricks and repair the oven chamber while the oven chamber is still hot. A loading apparatus lifts and inserts the insulated enclosure into the oven chamber. The insulated enclosure can be coupled to additional insulated enclosures to form an elongated interior area.

Abstract: A raku kiln has a fire ring with a cylindrical sidewall and bottom made of refractory material with a kiln shelf supported a few inches above the bottom to enclose a space that is superheated by burners. A firing-chamber rests on the fire ring and is lifted by a two aligned pulleys on top of a pole which rotates to move the chamber out of the way. A vertical pole mates with tubes on the chamber for vertical guidance during raising and lowering of the chamber. Flanges on the lower end of the chamber allow adding an extension chamber.

Abstract: A component replacement support tool for a fusing unit with a roller that contains a lamp cartridge includes a roller insertion/removal guide shaft and a lamp protection member detachably housed in the roller insertion/removal guide shaft. The fusing unit includes a replacement opening via which the roller or the lamp cartridge can be removed from or inserted into the fusing unit along an axis of the roller for replacement. The roller insertion/removal guide shaft is inserted into the roller along the axis of the roller and fixed so as to guide the roller when the roller is removed from or inserted into the fusing unit via the replacement opening. The lamp protection member is inserted between the roller and the lamp cartridge when the lamp cartridge is pulled out of or inserted into the roller along the axis of the roller via the replacement opening.

Abstract: A conveyor oven has several heating zones. Each heating zone is comprised of one or more infrared emitters that are configured to emit a spectrum of infrared wavelengths that varies in intensity and spectrum over time. The spectra of emitted infrared wavelengths in each zone can have the same or different profile. Zones are regions wherein infrared emitters are configured and operated to emit the same or substantially the same infrared energy wavelengths and intensity levels across an IR spectrum. Access to the infrared emitters and the conveyor is provided by one or more access or maintenance ports formed into a side of the conveyor oven. Temperature control inside the oven is effectuated by venting hot air through air vents formed into the oven sides and/or top.

Abstract: A furnace of controlled heating and treatment of material using infrared radiation. The furnace is capable of continuous infrared treating of material with consistent radiation being applied to the material, ease of access to the furnace for maintenance cleaning and repair, excellent control of radiant cooling of the material to be treated, and ease of maintenance of a volatile component condenser.

Abstract: A kiln has a control box pivotably coupled to an oven portion via a hinge at a lower end of the control box so that the control box can pivot about the hinge from a closed position adjacent the oven portion to an open position where an upper end of the control box is separated from the oven portion. The control box houses electronic controller components. A chimney portion is attached to the oven portion and is separated from the upper end of the control box when the control box is in the open position. The control box pivots about the hinge along a generally horizontal axis. A linkage is coupled between the control box and the oven portion to limit the pivotal movement range of the control box at the open position.

Abstract: This device comprises: two pairs of lateral flanges rotatably mounted respectively on a shaft pivoting in the frame of the furnace, each pair of flanges receiving a strip support roll by the agency of removable fastening means; means for driving said pairs of lateral flanges, ensuring that their angular displacement is synchronized during the interchange operations; central buffer provided with raising means, which is designed to shut off the orifice provided in the hearth of the furnace, for carrying out the operations of discharging a roll outwards from the furnace containment at the end of an interchange operation; two raisable buffers, one for each support roll, which may be displaced in a vertical translational movement in order respectively:to ensure the sealing of the orifice provided in the hearth of the furnace during the roll interchange phase;to ensure that the rolls are supported when the roll bearings are demounted in order to remove the inoperative roll from the corresponding flanges, andto carr

Abstract: A quartz tube with multiple thermocouple ports arranged along its radius allows for the quartz tube to be rotated while the thermocouple is always placed in the bottom position of the quartz tube. This avoids a problem of the sagging of the quartz tube. When quartz tubes are not rotated, the quartz tubes tend to start sagging from their top. By rotating the quartz tube different portions of the quartz tube are at the top at different times. By using multiple thermocouple ports arranged around the radius of the quartz tube, the thermocouple can be positioned at the bottom of the quartz tube for different orientations of the quartz tube.

Abstract: A device repairs worn depressed surfaces around a tap hole opening in a blast furnace plate. The device includes a preformed frusto-conical member made of a refractory material that is flexible and rapidly baked. A ferrule is formed of frangible material and encloses the refractory member therein. The ferrule is fastened to the nose of a tap hole gun which impacts against the depressed surface thereby causing destruction of the ferrule and allowing adhering deformation of the refractory material to fill the worn depressed surface of the plate--around the tap hole.

Abstract: A furnace has side walls and a bottom wall with a refractory lining. To permit mounting of ancillary equipment such as electrode refractory blocks are fitted to the bottom wall of the furnace. To mount each refractory block a hole is bored through the bottom wall from the exterior of the furnace with a large diameter in the outer part of the wall and a smaller diameter in the lining. The refractory block has a stepped construction to fit closely inside the bored holes. A central passageway through the refractory block has a removable plug at its inner end which may be displaced by insertion of an ancillary device such as an electrode.

Abstract: A casing for a kiln includes at least one casing unit comprising: vertical and horizontal frame members assembled according to the shape of a framework of the kiln; outer plates secured to at least one of the vertical and horziontal frame members for covering the spacings encircled by said vertical and horizontal frame members; guide fittings provided at the spacings between outer plates adjacent in a longitudinal direction of the kiln for slidably supporting the ends of said outer plates; and securing means for securing said outer plates to said vertical frame member or horizontal frame member so that the spacings between the adjacent outer plates are expandable in a longitudinal direction of the kiln.

Abstract: An elongated, horizontal tunnel-type furnace for heat treating workpieces carried in succession therethrough. The furnace is of modular construction and comprises a series of contiguous individual modular sections that define a tunnel-type enclosure. Each modular section comprises a stationary lower enclosure section and an assembled vertically retractable upper enclosure section. The upper enclosure sections are supported along opposite sides by a plurality of spaced, free-standing lifting devices. A screw-jack is associated with each lifting device for raising and lowering the upper enclosure sections relative to the lower enclosure sections. The upper enclosure sections may be raised and lowered individually or joined together and moved as a unit.

Abstract: An apparatus for securing loose wall brick or refractory lining in process heaters eliminates the need for the assistance of personnel outside the heater. Also, the requirement for scaffolding outside the heater is eliminated. Brick or refractory lining on process heater walls becomes loose and pulls away from the skin because of expansion and contraction over a period of time. The holdback plate assembly may comprise a rod of stainless steel which is threaded at one end (access end) and slotted at the other end (non-access end). A piece of flat bar is pivotally attached off center in the slotted end of the rod thereby allowing it to rotate freely for 90.degree. when unrestrained. The rod is inserted through a hole drilled through the brick and heater wall then positioned such that the flat bar rotates 90.degree. in the slot.

Abstract: In the repair of a refractory lining of a shaft furnace having a steel shell, a worn residual refractory lining inside the shell and cooling plates extending through the shell into the refractory lining, the worn lining is retained and an additional lining structure is added by(a) forming a refractory concrete layer with a flat upper surface at a ring of said cooling plates,(b) building up on the flat upper surface a refractory brickwork of blocks which is self-supporting and which has recesses in which cooling plates are located with clearance, the blocks being selected in accordance with the amount of wear locally,(c) filling space between the brickwork and the residual lining with concrete, and(d) filling the clearance space between the brickwork and the cooling plates in the recesses with a thermally conductive rammed mass.

Abstract: A vertically disposed steam generator includes a pressure vessel containing: a tube plate, chambers, a bundle of U-shaped bent heating tubes with supporting anchors, a steam trap above the heating tubes, and tubes for a secondary medium discharging into the pressure vessel. The heating tubes have ends guided through openings in the tube plate and discharging a primary medium into the chambers.

Abstract: The invention concerns a process and an apparatus for optimizing combustion in a furnace which has open chambers, referred to as a ring furnace, for the baking of carbonaceous blocks, the furnace comprising a plurality of preheating, baking and cooling chambers which are aligned in series, each chamber being formed by the alternating juxtaposition of hollow heating partitions in which the combustion gases circulate and compartments in which the carbonaceous blocks to be baked are stacked, the combustion gases being extracted by a suction pipe connected by delivery tubes to each of the heating partitions of the first natural preheating chamber.

Abstract: Apparatus and method for withdrawing a tightly fitting fuel gun from the tubular gun port of a boiler employs a spreader with movable jaws inserted between the gun port and an enlarged external portion of the gun. One jaw of the spreader engages the outer edge of the tubular gun port. This jaw has an arcuate upper edge corresponding to the inner wall of the gun port. Position means permits accurate registry of the upper edge. Spreading the jaws forces the gun out. The arcuate upper edge of the jaw permits unobstructed passage of the gun past the jaw.

Abstract: The hopper comprises a cylindrical side wall supported by an annular rolling ring so as to be rotatable about its vertical axis, and a funnel shaped bottom with a central outflow orifice controlled by a valve. To allow rapid removal of the rolling ring, the bottom is separated from the side wall and rests freely on an inner edge of the latter. An apparatus is provided for raising the bottom within the wall and for lifting the side wall slightly from the rolling ring.

Abstract: A device is provided for extracting a sheet-metal-encased gas-purge brick from a perforated brick or a perforated-brick sleeve simply, quickly and without causing any appreciable contamination. The device consists of a frame adapted to rest upon the exterior of the perforated brick, upon the perforated-brick sleeve, or upon the outer wall of a metallurgical vessel; a drawbar displaceable axially in the frame in relation to the metallurgical vessel and adapted to be set up in alignment with the centerline of the gas-purge brick; a device,provided on the drawbar, for coupling the end thereof to the gas-purge brick; and a driving means for displacing the drawbar in a direction away from the perforated brick. The coupling device consists of a coupling part seated upon the drawbar; a counter-coupling part secured to the gas-purge brick; and a coupling pin adapted to be passed through aligned holes in the two coupling parts.

Abstract: The synthesis gas cooler is provided with a movable platform in the space between the inner and outer flue. The platform may be constructed in segments with separate cable and winch means provided for raising and lowering of the platform segments via suspension structures. The suspension structures may also be secured in a raised position by bars which pass through fittings at the upper end of the suspension structures and which are supported in a partition above the movable platform.

Abstract: A maintenance platform for reaching the upper area of the furnace (10) of a steam generator that can be quickly and easily assembled during a maintenance shutdown. The grid or frame of the platform is made up of a plurality of beams (22) extending into the furnace from opposite furnace walls (19). Cables (50) from the roof (60) support one end of the beams. Planking (66, 68) that interlocks (62, 64, 70) with the beams (22) completes the platform.

Abstract: In a support construction for a hot blast main which is connected by respective branches to the outlets of a plurality of hot blast stoves of a blast furnace, the main is suspended on each stove by means of a rod system secured to a stiffened transitional region between the wall and dome of the stove and having an outer end located above the main. The main is suspended from this outer end, to which at least one strut extends from the stove wall adjacent the hot blast outlet. A travelling crane track is secured to the lower side of the rod systems so as to extend above valves incorporated in the hot blast branches. Thus these valves can easily be removed and replaced.

Abstract: A modular oven device for baking rewound and varnished electrical components of substantial size includes front and rear oven sections, sized to pass individually through a passageway too narrow to accommodate the component to be baked, and assembled on a base section to define an oven cavity, and a heater/blower section assembled on one oven section. The oven sections are characterized by double, unsulated walls, flanges covering joints, a thermostatic control, and inlet and exhaust air flow regulation.

Abstract: A fluidized bed reactor is provided with heat exchange coils for controlling the temperature of the fluidized bed, with only vertically oriented sections of the coils exposed to the erosive conditions in the fluidized bed. The vapor-liquid circuit, of which the heat exchanger coils are a part, is arranged to operate on the principle of natural circulation. At least some of the tuyere elements discharge fluidizing gas at a level substantially above the constriction plate and the bed solids below the level of the tuyere gas discharge constitute a static layer during fluidization in which the lower angle bends of the heat exchange coils are embedded and so shielded from erosion by the fluidized solids of the bed proper. The static layer of bed solids also accommodates thermal expansion of the lower angle bend due to elevated temperatures and insulates the constriction plate from the high temperatures in the reactor.

Abstract: A ceramic fiber module, suitable for lining furnaces, comprises a weldable (metallic or perforate refractory) backing and a number of ceramic fiber mats cemented to the backing by the edge of the mat, so as to leave a portion of the backing accessible between mats or on their perimeter, for welding. The weldable backing is welded to a metallic substrate, preferably by use of spherical attachments, to provide thermal protection to the metallic substrate.

Abstract: An apparatus and method for automatically replacing damaged conveyor grates which can be remotely controlled. The apparatus is disposed slightly above the empty, return side of the conveyor at the cool end, and performs its function in this maintenance area. The apparatus employs a plurality of working heads which remove the damaged grate and replace it with a new grate without interrupting conveyor motion. The working heads are suspended above the conveyor in the maintenance area by a plurality of carriages which permit the working heads to access any grate within the maintenance area. The carriages also allow the working heads to move with the conveyor during the grate replacement cycle. Although the manipulation of these heads and carriages is largely automatic, the operator can initiate, direct and observe the apparatus' movements from a remote station thereby isolating him from a hazardous environment.