Abstract: A heat-treatment apparatus includes a casing, a loader which loads a workpiece to an inner part of the casing in order to apply a heat-treatment to the workpiece, and a canopy surface provided in the casing to cover the workpiece. The canopy surface includes a slope way with a sectional configuration where the canopy surface is cut on a plane vertical to a conveying direction of the workpiece inside the casing. The slope way includes a highest point and a downward inclined surface extending from the highest point to an outside of a zone between a perpendicular line extending from a left end of the workpiece and a perpendicular line extending from a right end of the workpiece.

Abstract: A fluidized bed reactor includes a reactor core and a stack of liner segments. The stack includes a first liner segment and a second liner segment. The first liner segment includes a first edge having a base surface and an angled surface. The base surface and the angled surface form an obtuse angle. The second liner segment includes a second edge. The first edge and the second edge form a shiplap joint to connect the first liner segment to the second liner segment.

Abstract: The invention relates to a set (array) of refractory ceramic bricks for the formation of a vault-like (arch-like) support structure.

Abstract: The furnace of the present invention includes a body of a furnace having a cylindrical shape; a steel shell which is arranged at an inside surface of the furnace; and a lining refractory which is arranged at an inside of the steel shell and includes a plurality of refractory blocks, wherein: each of the refractory blocks includes a hot-face end surface which has a hexagonal shape exposed to a middle of the furnace, and a cold-face end surface which has a hexagonal shape larger than the hot-face end surface, the cold-face end surface being arranged at an outer periphery side of the furnace; the refractory blocks are arranged such that each position of the hot-face end surface is positioned along the radial direction of the furnace at a predetermined reference position; and the refractory blocks are arrayed along the circumferential direction of an inside surface of the steel shell, thereby being stacked in a honeycomb manner.

Abstract: The invention relates to a bridge-like supporting structure made of fireproof ceramic stones, wherein two outer, end bearing stones have a largely horizontal step on the inner side of the outer, end bearing stones and a keystone arranged between the two bearing stones has at least one corresponding step on the two outer sides of the keystone. By means of said structure, thermal expansions can be better compensated.

Abstract: A thermally expandable covering construction (1) for furnaces (2), in particular kilns or melting furnaces includes a preferably segmented cover (7) and, for the expansion-tolerant reception thereof on the edge side, a bracket (15) having a movable mounting (16) and having a clamping device (17) acting on the bracket (15). The clamping device (17) has a horizontally arranged clamping rod (31) which is loaded by a spring (33), is axially displaceably mounted on a fixed frame (29) and is pivotably connected to the bracket (15) at the front end by means of a bearing (26).

Abstract: Gasifier preheater fuel and moderator injection apparatus, systems and methods are provided. A preheater distributor ring is securely mounted within the shell dome of a gasification vessel, for the selective discharge of preheat fuel and oxidizer into the vessel during preheating operations, or for the selective discharge of moderating agents into the vessel during normal gasification operations.

Abstract: A burner using biomass combustibles, namely pellet fuel, for a maple syrup evaporator. Compared to wood or oil burning heat sources, pellet fuel is less costly, burns more efficiently and generates the heat necessary to properly evaporate maple sap. The burner includes a burn pit defining a plurality of holes for allowing air to communicate between a combustion chamber and a primary air plenum formed between a base and an underside of the burn pit. An air supply conduit supplies air supply to the primary air plenum. A fuel conduit in communication with the combustion chamber supplies the pellet fuel for combustion within said burn pit. A secondary plenum in pneumatic communication with the primary air plenum receives and cools a portion of the primary air supply. A plurality of injectors in communication with the secondary plenum inject the cooled air into the combustion chamber.

Abstract: A refractory brick and mortar joint comprise a cold face of the refractory brick; a hot face of the refractory brick opposite the cold face, wherein the hot face is shorter in length than the cold face; and at least one tapered mortar joint extending from the hot face to the cold face, wherein the at least one tapered mortar joint is thicker at the hot face of the refractory brick than at the cold face of the refractory brick. A refractory brick comprises a cold face; a hot face opposite the cold face, wherein the hot face is shorter in length than the cold face; and at least one surface extending from the cold face to the hot face, wherein the at least one surface is angled to accommodate the difference in length between the cold face and the hot face.

Abstract: A yard waste incinerator device is provided. The device includes an at least partially spherical outer member which is comprised of a truncated sphere. The outer member is usually comprised of a multiplicity of frame members that are spaced apart, but intersect with one another so they look much like latitudinal and longitudinal lines of a globe. Thus, they define a fairly open structure. A partially spherical cover is provided that will moveably engage the frame of the spherical outer member. The cover may be removed to allow debris and the like to be placed in the interior of the at least partially spherical outer member. By placing the cover back in a closed position, the yard ball can be rolled from one place to another rather easily. This is the result of the cover being generally spherically shaped, similar to the outer member so that, when the cover is in place, the yard ball has a spherical or ball shape. When the cover is moved, yard debris may be placed into the device.

Abstract: A supporting-arch construction having two abutment blocks, one impost, in each case, engaging against each abutment block. Supporting-arch blocks are arranged between the imposts, and are of the same construction. A process is provided for producing such a supporting arch.

Abstract: The invention relates to a supporting-arch construction, the supporting-arch construction having two abutment blocks, in each case one impost (3) butting against each abutment block, and supporting-arch blocks which are arranged between the imposts (3) and are of the same construction, and to a process for producing such a supporting arch.

Abstract: A furnace for melting vitrifiable materials having a compartment (1) for the melting/refining of the glass and which is provided in its upstream part with at least one opening (12) to be supplied with vitrifiable materials (10) with the aid of a charging device positioned facing and in the downstream part a discharge opening (17) for the molten glass issuing into one or more successive, downstream compartments (18, 19) for leading the molten glass to the forming zone. The melting of the vitrifiable materials takes place in the melting/refining compartment (1) essentially via a plurality of burners (16) with an oxidizer constituted by oxygen. It is designed to operate without any air introduction into the melting/refining compartment (1) coming from the downstream compartment or compartments.

Abstract: A combination of a spray cooled roof having a central opening, a support member and mast post wherein the roof is provided with an engagement which are detachably engaged to the corresponding engagement affixed to a support arm assembly which extends over a closed part of the roof. The support member is coupled to the mast post which raises, lowers and laterally moves the roof.

Abstract: The invention relates to a keystone set for installation in the transition region between two sections of an arch-shaped support structure, the set consisting of two transition stones, between which at least one keystone is axially insertable.

Abstract: A burner throat is defined by a cage of tubes and is lined by fitting refractory tiles. A plurality of retaining means each having two joined parts, the outer part abutting the tubes and the inner part exerting an abutting force radially inwards on the tiles to retain them in position. In use the abutting force on the tiles can be varied to suit the design characteristics and environment, by varying the exposed length of a pin which threadedly mates in a complementary bore in each of the two parts. To further secure the tiles, a dowel is provided to mate in complementary bores formed in an adjacent side of abutting tiles.

Abstract: To simplify the insertion and to improve the stability as well as to avoid mechanical damage to a ceiling of an industrial furnace, the invention proposes a fire-resistant ceiling element to be used as a self-supporting building element which can be inserted on the side of the furnace channel.

Abstract: A process for the assembly of at least one adjacent pair of component structural elements to form an upright vault structure, each of the elements having a recess, wherein the elements are arranged flat on the ground in the desired relative configuration and are temporarily joined together into an assembled unit by an assembly device, whereafter the device and the assembled unit are lifted and placed in a final position of the structure, and the joining device is removed from the elements. The joining device includes a post and a pair of opposed spaced jaw members mounted on the post for relative movement toward and away from one another, a pair of wing members being afixed to one of the jaw members, the wing members extending from opposite sides of this jaw member and toward the other of the jaw members and respectively engaging the recess of the structural elements. The jaw members are clamped together about the joined structural element.

Abstract: Thermal insulation for crowns and other industrial furnace parts having a surface subject to insulation. A reinforcing lattice made up of sectors is formed on such surface, such sectors are filled by refractory material. An adhesive protection layer made of material which is hardenable under the affect of the heat radiated from the furnace is then applied over the sectors of the refractory insulation material.

Abstract: The brackets connecting the furnace roof support beams to the buckstays of an open hearth furnace sidewall are reversible to provide for vertical shifting of the furnace roof support structure. The support brackets comprise a pair of symmetrical bracket pieces each having two generally vertically aligned sidewall connection points, and a support beam connection point vertically offset from the centerpoint defined by the sidewall connection points, such that the elevation of the support beam connection point is shifted when the vertical orientation of the sidewall connection points is reversed. The elevation of the roof support structure is thereby easily shifted, and refractory blocks of differing longitudinal lengths may therefore readily be incorporated into the furnace roof structure.

Abstract: Honeycomb muffle in tank furnaces for glass melting, comprising blocks of refractory material, characterized in that at least the crown of each furnace is made of blocks of refractory material, the free surface of which facing inwardly of the furnace is shaped with at least one recess defined by projecting ribs.

Abstract: A furnace roof for an electric arc furnace which is divided into several blocks so that local damage, if any, of the furnace roof can be repaired easily by replacing a block which has been damaged with a new spare one, without taking down the whole furnace roof for repairs.

Abstract: Electric furnace roof comprising key-arch-wedge refractory shapes contained in adjacent concentric rings within a roof band, expansion allowance means disposed between brick in both the radial and circumferential direction and spacer means disposed between brick in at least the radial direction.

Abstract: An electric furnace roof having spaced-apart, inner and outer, cooling-fluid-circulating refractory tile or block-carrying metal ring structures is provided with an upwardly offset, outwardly extending, roof ledge segment which, with an aligned, cooperating furnace side wall segment defines a smoke hole open portion to the furnace. The side wall segment of the furnace wall, with the roof segment, also provides an inner smoke chest that is open to the smoke hole portion, and has an upwardly enlarged funnel shape, and is metal reinforced. The roof segment is provided with a cooling water circulating loop system which may be independent of cooling means supplying inner and outer, radially spaced-apart, metal ring structures of the roof. The roof is adapted to be raised and lowered as a unit in a conventional manner with respect to the furnace wall and to be swung to one side thereof for scrap-charging and maintenance purposes.

Abstract: A method for preventing the dropping of individual bricks from a sprung arch roof employed in a continuous tank-type glass melting furnace, the dropping of the bricks normally occurring during heat-up of the furnace. The slightly tapered bricks employed in constructing the roof are oriented with their long axis in the vertical direction and, as heating occurs and the structure differentially expands and the bricks dry out, some become sufficiently loose to drop from the roof into the tank of the furnace. In visually observing the interior surface of the roof during heat-up, it can be seen which bricks are settling and likely to drop therefrom. These bricks are pulled up through the roof from above by a suction cup and mortar is placed around the bricks. The bricks are then dropped back into place with the mortar holding the bricks until they become wedged firmly in place as the temperature of the roof increases.