Claims
- 1. In a refractory plate for use as a stationary and/or as a movable closure plate in a sliding closure unit for controlling the discharge of molten metal from a metallurgical vessel wherein the movable refractory plate has therethrough a discharge opening and is slidable with respect to the stationary refractory plate having therethrough a discharge opening between an open position with the discharge openings in alignment and a closed position whereat a surface of the movable plate blocks the discharge opening of the stationary plate, the improvement wherein said refractory plate comprises:
- a refractory plate body having parallel opposite entirely planar surfaces including one said surface adapted to slidingly contact the other plate and another surface spaced therefrom;
- said discharge opening extending through said body between said opposite planar surfaces;
- at least one other discharge opening extending through said body between said opposite planar surfaces;
- a stopper plug of refractory material sealingly closing said other discharge opening, said plug having a uniform shape throughout the length thereof in a direction axially of said other discharge opening;
- whereby upon use of the unit with resultant erosion damage to said one surface around the first-mentioned said discharge opening of said refractory plate, said refractory plate may be reversed with said another surface adapted to slidingly contact the other plate, with said one surface spaced therefrom, with said plug removed from said other discharge opening, and with a stopper plug of refractory material sealingly closing said first-mentioned discharge opening; and
- said first-mentioned discharge opening and said other discharge opening being spaced from each other at respective locations such that, when said other discharge opening is plugged and the movable plate is moved toward the closed position of the sliding closure unit, said plug in said other discharge opening is located in an area of said one surface adapted to block the discharge opening of the other plate and such that, when said first-mentioned discharge opening is plugged and the movable plate is moved toward the closed position of the sliding closure unit, said plug in said first-mentioned discharge opening is located in an area of said another surface adapted to block the discharge opening of the other plate.
- 2. A plate as claimed in claim 1, whereby said body and said plug are formed of identical refractory materials.
- 3. A plate as claimed in claim 1, wherein said plug comprises a drill core resulting from core drill formation of one of said discharge openings.
- 4. A plate as claimed in claim 1, wherein said discharge openings therein have the same dimensions.
- 5. A plate as claimed in claim 1, wherein said plug is fixed in said other discharge opening by means of ceramic setting mortar.
- 6. A plate as claimed in claim 1, for use in a linear sliding closure unit, wherein said other discharge opening opens onto said one surface adapted to be in abutting sliding contact with a surface of the other plate of the unit, at said area thereof such that said plug is positioned to cover a discharge opening of the other plate upon closing of the unit.
- 7. A plate as claimed in claim 6, wherein said plug is flush with said one surface.
- 8. In a sliding closure unit for controlling the discharge of molten metal from a metallurgical vessel including a stationary refractory plate having therethrough a discharge opening, and a movable refractory plate having therethrough a discharge opening, said plates being mounted with mutual surfaces thereof in abutting sliding contact, and said movable plate being slidable with respect to said stationary plate between an open position with said discharge openings in alignment for discharging therethrough molten metal and a closed position with said surface of each said plate blocking said discharge opening of the other said plate, the improvement wherein at least one said plate comprises:
- a refractory plate body having parallel opposite entirely planar surfaces including one said surface in sliding contact with the other said plate and another surface spaced therefrom, with the first-mentioned said discharge opening of said one plate extending through said body between said parallel surfaces;
- at least one other discharge opening extending through said body between said parallel surfaces;
- a stopper plug of refractory material sealingly closing said other discharge opening, said plug having a uniform shape throughout the length thereof in a direction axially of said other discharge opening;
- whereby upon use of said unit with resultant erosion damage to said one surface around said first-mentioned discharge opening, said one plate may be reversed with said another surface in sliding with said other plate, with said one surface spaced therefrom, with said plug removed from said other discharge opening, and with a stopper plug of refractory material sealingly closing said first-mentioned discharge opening;
- said first-mentioned discharge opening and said other discharge opening being spaced from each other at respective locations such that, when said other discharge opening is plugged and said movable plate is moved toward said closed position thereof, said plug in said other discharge opening is located in an area of said one surface operating to block said discharge opening of said other plate and such that, when said first-mentioned discharge opening is plugged and said movable plate is moved toward said closed position thereof, said plug in said first-mentioned opening is located in an area of said another surface operating to block said discharge opening of said other plate.
- 9. The improvement claimed in claim 8, wherein said body and said plug are formed of identical refractory materials.
- 10. The improvement claimed in claim 8, wherein said plug comprises a drill core resulting from core drill formation of one of said discharge openings.
- 11. The improvement claimed in claim 8, wherein said first-mentioned and other discharge openings have the same dimensions.
- 12. The improvement claimed in claim 8, wherein said plug is fixed in said other discharge opening by means of ceramic setting mortar.
- 13. The improvement claimed in claim 8, wherein said unit comprises a linear sliding closure unit, and said other discharge opening opens onto said one surface at said working area thereof such that said plug covers said discharge opening in said other plate upon movement of said movable plate to said closed position thereof.
- 14. The improvement claimed in claim 13, wherein said plug is flush with said one surface.
- 15. The improvement claimed in claim 8, wherein each of said movable and stationary plates has therethrough at least one said other discharge opening sealingly closed by a respective said plug, whereby both said plates are reversibly mounted.
- 16. In a method of discharging molten metal from a metallurgical vessel by means of a sliding closure unit of the type including a stationary refractory plate having therethrough a discharge opening, and a movable refractory plate having therethrough a discharge opening, said plates being mounted with mutual planar surfaces thereof in abutting sliding contact, by sliding said movable plate with respect to said stationary plate between an open position with said discharge openings in alignment, thereby discharging molten metal, and a closed portion with said surface of each said plate blocking said discharge opening of the other said plate, thus interrupting discharge of molten metal, during which operation the molten metal causes erosion damage to said abutting surfaces around said discharge openings, the improvement comprising increasing the useful life of at least one said plate by:
- constructing said one plate as a refractory plate body having parallel opposite planar surfaces including one said surface in sliding contact with the other said plate and another surface spaced therefrom, with the first-mentioned said discharge opening of said one plate extending through said body between said parallel surfaces, and with at least one other discharge opening extending through said body between said parallel surfaces;
- sealingly closing said other discharge opening with a stopper plug of refractory material, and operating said unit with said one surface in sliding contact with the other said plate until the occurrence of said erosion damage;
- removing said plug from said other discharge opening;
- sealingly closing said erosion-damaged discharge opening with a stopper plug of refractory material;
- reversing said one plate with said another surface thereof in sliding contact with said other plate and with the erosion-damaged said one surface spaced therefrom; and
- providing said first-mentioned discharge opening and said other discharge opening at respective locations spaced from each other such that, when said other discharge opening is plugged and said movable plate is moved toward said closed position thereof, said plug in said other discharge opening is located in an area of said one surface operating to block said discharge opening of said other plate and such that, when said first-mentioned discharge opening is plugged and said movable plate is moved toward said closed position thereof, said plug in said first-mentioned opening is located in an area of said another surface operating to block said discharge opening of said other plate.
- 17. The improvement claimed in claim 16, comprising closing said erosion-damaged discharge opening by means of said plug removed from said other discharge opening.
- 18. The improvement claimed in claim 16, comprising fixing said plugs in respective said discharge openings by means of ceramic setting mortar.
- 19. The improvement claimed in claim 16, comprising constructing each of said movable and stationary plates to have therethrough at least one said other discharge opening closed by a respective said plug, and, after said erosion damage to both said plates, removing said plugs from both said other discharge openings, closing both said erosion-damaged discharge openings with respective said plugs, and reversing both said plates.
- 20. The improvement claimed in claim 16, comprising providing said first-mentioned and other discharge openings at said respective locations such that said plugs cover said discharge opening in said other plate when said movable plate is in said closed position.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3345539 |
Dec 1983 |
DEX |
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Parent Case Info
This application is a continuation of now abandoned application Ser. No. 678,033, filed Dec. 4, 1984.
US Referenced Citations (6)
Foreign Referenced Citations (6)
Number |
Date |
Country |
2459568 |
Jan 1976 |
DEX |
2850183 |
May 1979 |
DEX |
3243305 |
May 1984 |
DEX |
2411542 |
Aug 1979 |
FRX |
1349591 |
Apr 1974 |
GBX |
1494477 |
Dec 1977 |
GBX |
Non-Patent Literature Citations (2)
Entry |
Russian Language Document "Modern Methods in the Operation of Cupola Furnaces", 12/1960, pp. 28-31, by A. A. Ananjin. |
"On Further Developments of Basic Ceramic Components in Sliding-Gate System", Wilfried Deilmann et al, 1979, pp. 1156-1168. |
Continuations (1)
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Number |
Date |
Country |
Parent |
678033 |
Dec 1984 |
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