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BR-112022013461-B1 - SLIDING CLOSURE FOR A METALLURGICAL CONTAINER AND ITS USE

BR112022013461B1BR 112022013461 B1BR112022013461 B1BR 112022013461B1BR-112022013461-B1

Abstract

SLIDING CLOSURE FOR A METALLURGICAL CONTAINER. The invention relates to a sliding closure (10) for a metallurgical container comprising a threaded hole (1) for draining molten metal or slag, said sliding closure being provided with a sliding housing (3) that can be attached to the container (2) and a closing plate (6) that can move within it to open and close the threaded hole (1). The sliding closure (10) also has only this movable closing plate (6), without a stationary closing plate, which can be moved directly on a sliding surface (7), extending around the threaded hole, preferably a lining block (9) in the container (2) and can be pressed by pre-tensioning elements. In this way, this sliding closure (10) provides a simpler construction structure and user-friendly handling.

Inventors

  • Goran Vukovic
  • René CHRISTEN
  • Kurt Ackermann

Assignees

  • REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG

Dates

Publication Date
20260317
Application Date
20201211
Priority Date
20200115

Claims (11)

  1. 1. Sliding closure for a metallurgical vessel with a threaded hole for casting metal castings or slag, with a sliding housing (3) that can be attached to the vessel (2) and a closing plate (6) that can move in it, for opening and closing the threaded hole (1), CHARACTERIZED in that the sliding closure (10) comprises exclusively this movable closing plate (6) without a fixed location closing plate, wherein the movable closing plate (6) is pressed directly onto a sliding surface (7) extending around the threaded hole (1), preferably of a lining block (9, 32) in the vessel (2), and is pressed by means of tensioning elements (11).
  2. 2. Sliding closure, according to claim 1, CHARACTERIZED in that a sliding carriage (5) is movably guided in a support frame (4) of the slide housing (3) with the closing plate (6), which, when moving out of the effective working area, can be released from tension, and can be rotated out and in the support frame (4) by means of a pivoting device (20).
  3. 3. Sliding closure, according to claim 2, CHARACTERIZED in that the sliding elements arranged laterally in the sliding carriage (5) run along guides (15a and 15b respectively) of a support frame (4) of the cladding housing (3), placed under load by tensioning elements (11), wherein the guides (15a, 15b) are formed, outside the effective working area of the closing plate (6), as ramps (19a and 19b respectively), whose angle of inclination is dimensioned in such a way that the guides are lowered by the amount in height that is relaxed by the tensioning elements.
  4. 4. Sliding closure, according to claim 2 or 3, CHARACTERIZED in that the pair of rollers (14a) of the sliding carriage (5), formed as sliding elements, can be received at the end of the ramp (19a) in each case in a corresponding cutout opening (21) of a pivoting piece (23) of the pivoting device (20) in the support frame (4), while the other pair of rollers (14b), formed as sliding elements, can be rotated outwards through an intermediate space (22) remaining free between the guides (15a, 15b).
  5. 5. Sliding closure, according to claim 4, CHARACTERIZED in that the pivoting parts (23) of the pivoting device (20) can be rotated in two positions, wherein, in one position, each of them forms a lifting delimiting stop (23') on the end side in a set of guides (15a), so that the sliding carriage (5) cannot be released from the tensioning force when in the operating state, while, in the other position, the pair of rollers (14a) of the sliding carriage (5), formed as sliding elements, can be received in these cut-out openings (21) for pivoting the sliding carriage outwards and inwards, respectively.
  6. 6. Sliding closure, according to any one of claims 1 to 5, CHARACTERIZED in that the sliding plate (6) is provided with a replaceable insert made of metal, graphite or refractory material.
  7. 7. Sliding closure, according to any one of claims 1 to 6, CHARACTERIZED in that the sliding surface (7) for the closure plate (6) is formed by a lining block (9), integrated into the housing lining and formed from copper or refractory material.
  8. 8. Sliding closure, according to any one of claims 1 to 7, CHARACTERIZED in that the threaded hole (1), the sliding plate (6) and a protruding casting or drainage sleeve (16) are aligned with respect to the sliding device of the closing plate (6) as perpendicular or at an angle of, for example, 60°.
  9. 9. Sliding closure, according to any one of claims 1 to 8, CHARACTERIZED in that the tensioning elements (11) are formed in each case by two support frames (4) arranged symmetrically and on a parallel axis in the slide housing (3) and are associated with it, which has the effect of tensioning the support frame (4) against the sliding carriage (5).
  10. 10. Use of a sliding closure for a metallurgical container with a threaded hole, whereby the sliding closure (10, 30) is provided with a sliding housing (3) that can be attached to the container (2), and a closing plate (6) that can move in it to open and close the threaded hole (1, 31), CHARACTERIZED by the fact that the sliding closure (10, 30) is used for slag drainage, and, in this situation, is provided exclusively with this closing plate (6) without a fixed position closing plate.
  11. 11. Use, according to claim 10, CHARACTERIZED in that the closing plate (6) can slide directly on a sliding surface (7) that extends around the threading hole (1), preferably of a lining block (9, 32) in the container (2), and, in this situation, consists of a copper plate.

Description

[001] The invention relates to a sliding closure for a metallurgical vessel comprising a drainage hole for draining molten metal or slag, with a sliding housing that can be attached to the vessel, and a closing plate that can move to open and close the drainage hole. [002] With a generic sliding closure according to the printed descriptive report EP 2 318 559, a closing plate is provided in a copper anode furnace for the purification of molten copper, which is fixed in place and capable of sliding. The threading nozzle is aligned laterally on the furnace vessel wall in such a way that copper smelting occurs with the furnace in an inclined position, close to horizontal. Consequently, the sliding closure is aligned approximately perpendicularly to the furnace's median axis. This furnace, configured as a drum, comprises a cylindrical steel jacket as well as a refractory lining, in which a perforated refractory brick and a refractory sleeve connected to it are embedded in the smelting or drainage region, which in each case form an outlet opening. Connected to this is the fixed-location refractory closing plate and the sliding refractory closing plate, whereby, by the sliding displacement of the sliding plate, the furnace drum outlet can be blocked or closed. [003] The invention is based on the objective of providing a sliding closure of the type referred to in the preamble which, with a structurally simple design and a high degree of reliability, allows for simple operation and maintenance. [004] This objective is solved according to the invention by the fact that the sliding closure comprises only this sliding closure plate in the slide housing, without a fixed location closure plate. [005] Such a sliding closure offers a number of advantages over a conventional arrangement with two or more closing plates. On the one hand, it is composed of fewer components and is therefore more economical to manufacture, as the lining block, the closing plate and also the casting sleeve can be made of an economical metallic material such as copper or steel. [006] On the other hand, the sliding closure is less prone to failure and also requires only simpler maintenance. This arrangement also makes unnecessary the operation that would otherwise be required to manually plug the threaded hole to close it. [007] The sliding closure according to the invention can be easily adapted to any threaded hole. It is self-explanatory that these advantages are not limited to the use of the sliding closure for slag drainage. [008] The invention further provides that the closing plate of the sliding closure is pressed against the sliding surface of the furnace by tensioning elements arranged in the slide housing, which, during the closing of the closing plate, are relieved of tension outside their area of effect and allow the closing plate to rotate out of the closing housing in the unloaded state. In this way, the closing plate can be easily inspected and replaced, if necessary, without the need for elaborate manipulations. [009] To effect the replacement of the plate with the simplest possible structural arrangement, the invention provides that the closing plate is mounted on a sliding carriage, with rollers preferably mounted in pairs, which run along the guides of a support frame of the slide housing, subjected to loading by the tensioning elements, in which the guides are formed, outside the effective working area of the closing plate, as ramps, whose angle of inclination is dimensioned in such a way that the guides are lowered by the amount in height that is relaxed by the tensioning elements. In this way it is possible to relieve the tension of the tensioning elements by the posterior movement of the sliding carriage. [0010] In order to simplify the monitoring and replacement of the closing plate, the invention further provides that the front pair of rollers of the sliding carriage is able to rotate at the ends of the ramps, in openings cut out of pivoting parts in the support frame, while the rear pair of rollers can be rotated outwards through an intermediate space left free between the guides. [0011] In order to extend the service life of the closing plate, it is useful if it is provided in the area of most intense wear stress with a replaceable insert element made of metal, graphite or refractory material. [0012] The invention further provides that a protruding casting or drainage sleeve is connected to the closing plate, which is preferably aligned perpendicular to the sliding movement of the closing plate or at an angle of, for example, 30° relative to the perpendicular of that sliding direction. [0013] This casting or drainage sleeve can serve as a guide for a drill bit or lance for opening or burning the threaded hole, before or after slag drainage. It also helps, especially at the beginning of extraction, to prevent slag spillage. In addition, with a suitable shape, it allows the slag flow to be directed specifically towards a