Abstract:
A feed apparatus feed apparatus for delivering particulate material to a foundry furnace having disposed therein a furnace form defining an annulus with the furnace exterior wall for receipt of the particulate material. The novel feed apparatus broadly includes a cover, having a top end, side wall, and a bottom end, the latter of which is adapted to fit on top of the furnace ring or melt deck floor; a rotatable tabletop that is adapted to fit on the top end of the cover while permitting air ingress into the cover and having at least one access port for delivering the particulate material into the interior of the cover; a form top that is adapted to fit within the cover on top of the furnace form to facilitate delivery of said particulate material into the annulus made by the furnace form and the furnace exterior wall; means for rotating the tabletop about the centerline of the cover; and means for centering the tabletop as it rotates about the centerline of the cover.
Abstract:
A method of repairing the lining of a converter includes disposing a refractory composition onto a worn surface of the converter. The refractory composition includes alumina, silicon carbide, and silica. The method may also include disposing a nozzle into a tuyere, pumping a refractory composition through the nozzle and onto a worn surface of the converter, and allowing the refractory composition to flow onto the worn surface of the refractory.
Abstract:
Portable inspection apparatus for determining the actual remaining thickness of the lining of a BOF vessel. The apparatus is mounted on a portable cart which can be wheeled into close proximity with the open top of a horizontally disposed furnace vessel. A laser transmitter directs a laser light beam toward the furnace lining. The light beam scattered from the vessel lining is received by a self-scanned linear array and correlated by means of a computer to provide a graphical representation of actual remaining lining thickness.Pneumatically operated locating members cooperate with positioning pads in the floor adjacent the vessel to accurately and repeatably position the cart with respect to the furnace coordinates. The inspection apparatus is also provided with computer processing to automatically scan a preselected area of the vessel lining less than the entire area in order to monitor lining locations of high potential wear. The processing also calculates the height of the molten metal for accurately positioning an oxygen lance.
Abstract:
The apparatus comprises an operating station with a rotary work platform, a non-rotary supporting stage supporting the work platform by means of a first bearing, a robot for laying the bricks, a monitoring booth, a device for raising and lowering brick pallets and at least one automatic brick-depalletizing mechanism for transferring the bricks from the pallets towards a stand-by station. This stand-by station comprises a turret which can contain a reserve of bricks of different types and which is supported by the stage by means of a second bearing, so as to be rotatable independently of the stage and the platform about the vertical axis of the vessel. The apparatus is particularly well suited for repairing metallurgical converters.
Abstract:
There is disclosed an installation with a refractorily lined metallurgical vessel. The vessel, on its upper end, is provided with a mouth that is connectable to a chimney arranged at a distance above the mouth, by a hood insertable between the mouth and the chimney. In order to provide an installation with which the lining team is not jeopardized and by which it is possible to introduce the lining material into the metallurgical vessel in a simple and time-saving manner, a container is introduceable into the space present between the mouth and the chimney after the removal of the hood. The container covers the chimney downwardly and includes at least one closeable bottom opening. The carrying means for introducing the container is equipped with at least one hoist displaceable from laterally beside the mouth of the vessel to above the mouth of the vessel.
Abstract:
The invention refers to a brick lining apparatus for metallurgical vessels, particularly for steel mill converters and/or blast furnaces, with an annular working platform which is automatically adjustable in height, and with a coordinated brick conveyor line consisting of one or several chains leading around sprocket wheel pairs with attached brick supports, whereby working platform and brick conveyor line are retractable to approximately the distance between mill floor and vessel opening.
Abstract:
An apparatus for lining the walls of a metallurgical vessel with refractory bricks including support means over the top opening of the vessel, elongated tower means suspended within the vessel from the support means and rotatably movable thereon, and first conveyor means, in the tower and rotatably movable therewith, for conveying bricks vertically within the vessel. The first conveyor means has a charging end, and a discharge point which is vertically variable. A second conveyor means is provided which is vertically movable on the tower means and has a discharge end laterally adjustable with respect to the tower means. The second conveyor means receives bricks from the first conveyor means and transports them to the walls of the vessel at variable heights and distances from the tower means. By reason of the vertically variable discharge point, the first conveyor means delivers bricks to the second conveyor means at any position of the second conveyor means.
Abstract:
A disadvantage during the operation of a change converter unit (1) of an oxygen steel-making plant, wherein converters (4a) that have become unusable due to the wear and tear of the fireproof material are removed from the steel-making stand (2) for repair, and wherein a converter (4b) provided with fireproof material is added in exchange to the steel-making stand (2), is that the connection between the converter vessel and the carrier ring first must be separated, and then either a change carriage provided with a lifting device must be used, or the implementation is limited, or restricted, by the crane capacity when changing AOD converters in stainless steel plants. In order to eliminate said disadvantages, the invention proposes that, for the change process, the worn converter (4a), including the entire converter unit (3a), comprising not only the converter (4a), but also the converter carriage (7), carrier ring (6), tilting drive (5), bottom flushing device (9) and, if present, a carrier ring cooling device (10), is moved out of the steel-making stand (2) into an empty delivery and waiting stand (12s) for repair, and that, at the same time, a further structurally identical complete converter unit (3b), comprising a repaired, ready-to-use converter (4b), is moved from a further delivery and waiting stand (12b) into the steel-making stand (2).
Abstract:
An apparatus and method for replacing the tap hole liner of a Basic Oxygen Furnace (BOF/QBOP/AOD and all other types of converter vessels) includes a multi-purpose movable utility vehicle, a water-cooled self-centering drill removably attached to the multi-purpose utility vehicle, and a tap hole liner installation guide removably attached to the multi-purpose utility vehicle in place of the water-cooled self-centering drill attachment.
Abstract:
The device mounted at the end of an operating arm comprises one or more suckers for supporting objects, for example refractory bricks for the brick-lining of a metallurgical converter, means for linear and angular displacement of the suckers, sensors for monitoring and controlling automatically the means of displacement in order to grip and position the objects in a predetermined location, after immobilization of the operating arm. The suckers are provided on a sucker-carrying plate which in its turn is supported by a pair of blocks which can slide in transverse slide bars of a carriage which comprises a pair of longitudinal slide bars, perpendicular to the transverse slide bars and housed in sliding fashion in a central support attached to the end of the operating arm with a degree of angular freedom and a degree of linear freedom orthogonal to the axes of the longitudinal and transverse slide bars.