Abstract: In a metallurgical furnace of the type for re-heating metal billets and slabs, a pair of composite refractory tiles for insulating fluid-cooled structural members of the furnace. The tiles are a composite of a cast refractory shell which extends radially inward at selected portions to contact the furnace member. Attachment assemblies are embedded in the cast refractory shell and maintain proper alignment of each tile with the furnace structural member. In portions of the tile where contact with the furnace member is not made, a ceramic fiber insulating blanket fills a hollow between the refractory shell and the furnace member. Incorporating the ceramic fiber insulating blanket into each tile decreases furnace heat loss as compared to solid cast refractory tiles of comparable thickness.

Abstract: A pusher side coke oven door assembly comprises a door, a cold face refractory wall attached to the door, and a hot face refractory wall attached to and spaced from the cold face refractory wall to form therewith a hollow vent space for gases evolved from roasting coal, wherein a top section of the hot face refractory wall is L-shaped and has a horizontally-disposed leg extending across the hollow vent space, and a pair of extender plates mounted on the leg and extending vertically thereabove to prevent coal spillage and entry into the hollow vent space during coal levelling.

Abstract: A hard-faced ceramic fiber module is formed by providing a ceramic fiber sheet that is folded upon itself to form a first surface having adjacent folds and intermediate valleys by impregnating the first surface with an aqueous colloidal silica suspension, covering said impregnated first surface with a layer of a mixture of ceramic fibers in an aqueous colloidal suspension, compressing said layer, freezing said module and then heating the same to remove substantially all of the water.

Abstract: A coke oven door assembly has first abutting vertically aligned refractory cold face layers, second abutting vertically aligned refractory hot face layers spaced therefrom, and an integral one piece uppermost refractory section having a bottom, a horizontally extending top portion, and first and second downwardly depending leg portions with an interconnecting web. The interconnecting web is spaced from the side walls of the uppermost refractory section between the leg portions and extends from the horizontally extending portion at least partially downwardly towards the bottom of the uppermost refractory section.

Abstract: Refractory tile sections for insulating a pipe, such as a water-cooled pipe, have a pair of refractory tiles with concave faces and outwardly extending flanges. The refractory tiles are placed about the pipe with the flanges confronting each other, with a gap therebetween, and with recesses in the flanges aligned. Refractory connecting members are disposed in the aligned recesses, the connecting members having a bridging section extending across the gap and an enlarged end section in each of the aligned recesses. Refractory mortar secures the connecting members in the recesses and fills the gap between the flanges.

Abstract: Refractory articles are prepared by a freezecast process where a ceramic fiber mat is saturated with a colloidal silica aqueous suspension, frozen and then heated to produce a preform. The preform is then saturated with a colloidal silica aqueous suspension, frozen, and then heated to produce a refractory article having silica particles substantially uniformly distributed throughout. The density of the refractory article can be increased by compression of the saturated mat prior to freezing.

Abstract: A free hanging reheat furnace door has a main door section with modular refractory units secured to a frame in lateral rows and a detachable bottom door section formed from channels and struts which is also covered by modular refractory units. The door sections are detachably secured together with modular refractory units of each section mating together, and preferably a refractory shoe is provided that fits a recess in the lower modular units and encloses the lower channel of the bottom door section. Pairs of doors may be hung side-by-side with L-shaped refractory members secured to confronting sides of the doors to seal the gap between adjacent spaced doors.

Abstract: A universal coke oven door for use on varying width oven chambers in a coke oven battery is formed with hot side refractory sections and cold side refractory sections spaced therefrom. Ceramic wiper strips are provided which extend outwardly from the sides of the hot side refractory sections towards the oven doorjambs to prevent passage of coal or coke between the hot side refractory layer and the doorjambs. Sole plates may be provided on the bottommost refractory sections of the hot side or cold side refractory layers, while an extension is provided on the topmost refractory section of the hot side refractory layer which extends towards the cold side refractory layer and prevents coal or coke from entering the spacing between the two refractory layers.

Abstract: A coke oven door liner comprises a first refractory layer, a second refractory layer and connecting means. The first refractory layer has an outer surface which is adapted to abut the inner surface of the coke oven door and has width and height dimensions which are substantially coextensive with those of the opening to the coke oven which is sealed by the coke oven door. The second refractory layer, disposed within the coke oven, has width and height dimensions substantially coextensive with those of the first refractory layer and is spaced apart from and generally parallel to the first refractory layer, thus creating an elongated chamber between the first and second refractory layers. A connecting means connects the second refractory layer to the first refractory layer and allows for gases created by burning coal within the coke oven to enter the elongated chamber created between the first and second refractory layers and rise to the top portion of the coke oven to be removed from the coke oven.

Abstract: The specification discloses a door for a slab-heating furnace. A series of closure members are positioned in side-by-side relationship from one side of the opening to the other. Each closure member has one or more sections pivotally connected to an adjacent section.

Abstract: A lightweight, refractory soaking pit cover is formed from a plurality of trapezoidally shaped modules, with adjacent modules positioned wide-face-up and wide-face-down, and contained within a periphery of higher density rim blocks. The rim blocks and wide-face-down modules are attached to a structural steel frame, while the wide-face-up modules rest by gravity on the edges of the rim blocks and wide-face-down modules. The modules are readily replaceable and provide a lightweight construction and good insulation properties.

Abstract: An insulating tile section, and a process of securing an insulating tile section about a metal pipe about which the tile section is contoured to fit, where the steps comprise forming the refractory insulation about a metal channel section having a bottom, spaced side walls with outwardly extending flanges along the top edges of the side wall. There is likewise provided a novel weld in which the channel embedded in the tile is attached to the pipe by a weld of generally rivet-like contour.

Abstract: Replaceable heat insulation is provided for water-cooled pipes comprising structural supports and skid rails in slab reheating furnaces and like high-temperature metallurgical furnaces wherein the insulation is comprised of two mating sections of convenient length arranged to surround or, in the case of skid rails, largely surround the water-cooled pipes, the sections having metal fastening at their confronting edges brought into interfitting relation by sliding one section along the pipe relative to the other with provision for tightening the sections against the surface of the pipe and bringing portions of the interfitting metal fastenings into heat conducting contact with the water-cooled pipe. When each pair of sections has been fitted about the pipe and interlocked, but before being tightened about the pipe, each pair after the first is slid as a unit along the pipe into abutting position against the exposed end of the preceding pair and when so positioned being then firmly tightened about the pipe.

Abstract: A metallurgical furnace for the high temperature heating of heavy metal objects for subsequent operation, such as rolling or forging, has a work support for the pieces being heated comprised of water-cooled tubes and supports enclosed with sectional heat insulating tile enclosing the tubes where the sections of tile are immovably secured to the tubes by fasteners each having a tubular shank extending from a flanged head portion embedded in the refractory radially inward to the inner surface of the tile where it is welded to the exterior of the water-cooled tube to prevent relative movement between the tile and the tube under the heavy impacts to which the support is subjected and to more effectively cool the refractory tile immediately adjacent the fasteners.