Claims
- 1. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variable tiltable between an upright, non-tilted position and a fully-tilted position, said apparatus comprising:
- a trough extending outwardly from said tap hole for tilting with said furnace, said trough having a slag separating device at its distal end and defining a flow channel for directing said molten metal and slag to said device, said device being tiltable with said trough, said device defining an inlet for receiving said molten metal and slag and having an outlet from which said molten metal can be discharged, said device further defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged, said device defining a bottom opening to said reservoir below the level of said slag opening and further defining a passage means laterally offset from said reservoir for communicating between said bottom opening and said outlet, said passage means defining a weir laterally offset from said reservoir which extends generally upwardly above the level of said bottom opening to a predetermined distance below the level of the bottom of said slag opening and over which said molten metal flows to said outlet.
- 2. The apparatus in accordance with claim 1 in which said slag opening is located at least as far outwardly from said tap hole as is said weir; and said bottom opening is located at least as far outwardly as is said weir.
- 3. The apparatus in accordance with claim 1 in which said slag opening is defined in a side wall for discharging said slag laterally of said device.
- 4. The apparatus in accordance with claim 1 in which
- said reservoir is defined in part by a side wall;
- said side wall has a top end;
- said slag opening is defined in said side wall in the form of a notch that is open at said top end of said wall; and
- said notch is defined by (a) a rear surface extending downwardly from said side wall top end, (b) a front surface that is spaced forwardly of said rear surface and that extends downwardly from said side wall top end less than said rear surface, and (c) a bottom surface extending between the lower ends of said front and rear surfaces.
- 5. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully-tilted position, said apparatus comprising:
- a trough extending outwardly from said tap hole for tilting with said furnace, said trough having a slag separating device at its distal end and defining a flow channel for directing said molten metal and slag to said device, said device being tiltable with said trough, said device defining an inlet for receiving said molten metal and slag and having an outlet from which said molten metal can be discharged, said device further defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged, said device defining a bottom opening to said reservoir below the level of said slag opening and further defining a passage means for communicating between said bottom opening and said outlet, said passage means defining a weir which extends generally upwardly above the level of said bottom opening to a predetermined distance below the level of the bottom of said slag opening and over which said molten metal flows to said outlet, said slag opening being located at least as far outwardly from said tap hole as is said weir.
- 6. The apparatus in accordance with claim 5 in which said reservoir is laterally offset from said passage means and said weir.
- 7. The apparatus in accordance with claim 5 in which said slag opening is defined in a side wall for discharging said slag laterally of said device.
- 8. The apparatus in accordance with claim 5 in which
- said side wall has a top end;
- said slag opening is defined in said side wall in the form of a notch that is open at said top end of said wall; and
- said notch is defined by (a) a rear surface extending downwardly from said side wall top end, (b) a front surface that is spaced forwardly of said rear surface and that extends downwardly from said side wall top end less than said rear surface, and (c) a bottom surface extending between the lower ends of said front and rear surfaces.
- 9. The apparatus in accordance with claim 5 in which said passage means has a first portion extending rearwardly of said bottom opening; said bottom opening being located at least as far outwardly as is said weir.
- 10. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully-tilted position and which has a trough extending outwardly from said tap hole to define a flow channel for said molten metal and slag, said apparatus comprising:
- a device mounted on said trough for tilting with said trough, said device defining an inlet for receiving said molten metal and slag from said trough flow channel and having an outlet from which said molten metal can be discharged, said device defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged, said device further defining a bottom opening to said reservoir below the level of said slag opening and defining a passage means communicating between said bottom opening and said outlet, said device defining a weir which extends generally upwardly above the level of said bottom opening to a predetermined level below the level of the bottom of said slag opening and over which said molten metal flows to said outlet.
- 11. The apparatus in accordance with claim 10 in which said passage means and said weir are laterally offset from, and adjacent to, said reservoir.
- 12. The apparatus in accordance with claim 10 in which said slag opening is located at least as far outwardly from said tap hole as is said weir.
- 13. The apparatus in accordance with claim 10 in which
- said reservoir is defined in part by a side wall;
- said side wall has a top end;
- said slag opening is defined in said side wall in the form of a notch that is open at said top end of said wall; and
- said notch is defined by (a) a rear surface extending downwardly from said side wall top end, (b) a front surface that is spaced forwardly of said rear surface and that extends downwardly from said side wall top end less than said rear surface, and (c) a bottom surface extending between the lower ends of said front and rear surfaces.
- 14. The apparatus in accordance with claim 10 in which said passage means has a first portion extending rearwardly of said bottom opening; and said bottom opening is located at least as far outwardly as is said weir.
- 15. A method for controlling slag in a tap discharge of molten metal and floating slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully tilted position, said furnace having a trough means extending outwardly from said tap hole for directing the flow of said molten metal and slag from said furnace to a discharge outlet, said method comprising the steps of:
- (a) sufficiently tilting said furnace and trough means to discharge said molten metal and slag from said tap hole into said trough means whereby said molten metal can flow under the influence of gravity out of said discharge outlet during the following steps (b) through (c);
- (b) directing said flow of molten metal sequentially into a reservoir from which said slag can be discharged, into a passage from a bottom opening in said reservoir, generally upwardly along a weir that is partly defined by said passage, and over the top of said weir to said outlet;
- (c) retaining said slag in said reservoir while permitting said molten metal to flow out of said outlet; and
- (d) discharging said retained slag through a slag opening defined by said reservoir while maintaining said slag opening at least as far outwardly as is said weir and at a level above the level of said bottom opening.
- 16. The method in accordance with claim 15 wherein step (a) includes increasing the angle of tilt during said discharge of said molten metal and slag in step (a).
- 17. The method in accordance with claim 15 wherein
- said step (c) includes:
- maintaining the level of said molten metal below the bottom of said slag opening; and
- said step (d) includes:
- maintaining the level of the top of said floating slag in said reservoir above at least a portion of the bottom of said slag opening.
- 18. A method for controlling slag in a tap discharge of molten metal and floating slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully tilted position, said furnace having a trough means extending outwardly from said tap hole for directing the flow of said molten metal and slag from said furnace to a discharge outlet, said method comprising the steps of:
- (a) sufficiently tilting said furnace and trough means to discharge said molten metal and slag from said tap hole into said trough means whereby said molten metal can flow under the influence of gravity out of said discharge outlet during the following steps (b) through (c);
- (b) directing said flow of molten metal sequentially into a reservoir from which said slag can be discharged, into a laterally offset passage from a bottom opening in said reservoir, generally upwardly along a weir that is partly defined by said passage, and over the top of said weir to said outlet;
- (c) retaining said slag in said reservoir while permitting said molten metal to flow out of said outlet; and
- (d) discharging said retained slag through a slag opening defined by said reservoir.
- 19. The method in accordance with claim 18 wherein step (b) includes directing said flow of molten metal generally rearwardly from said bottom opening in said passage and step (d) includes discharging said slag through said slag opening located at a level above the level of said bottom opening.
- 20. A method for controlling slag in a tap discharge of molten metal and floating slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully tilted position, said furnace having a trough means for extending outwardly from said tap hole for directing the flow of said molten metal and slag from said furnace to a discharge outlet, said method comprising the steps of:
- (a) sufficiently tilting said furnace and trough means to discharge said molten metal and slag from said tap hole into said trough means whereby said molten metal can flow under the influence of gravity out of said discharge outlet during the following steps (b) through (c);
- (b) directing said flow of molten metal sequentially into a reservoir from which said slag can be discharged, into a passage from a bottom opening in said reservoir, generally rearwardly within said passage and then upwardly along a weir that is partly defined by said passage, and over the top of said weir to said outlet;
- (c) retaining said slag in said reservoir while permitting said molten metal to flow out of said outlet; and
- (d) discharging said retained slag through a slag opening defined by said reservoir.
- 21. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully-tilted position, said apparatus comprising:
- a trough extending outwardly from said tap hole; said trough having a slag separating device at its distal end and defining a flow channel for directing said molten metal and slag to said device; said device defining an inlet for receiving said molten metal and slag and having an outlet from which said molten metal and slag can be discharged; said device further defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged; said device defining a bottom opening to said reservoir below the level of said slag opening and further defining a passage means laterally offset from said reservoir for communicating between said bottom opening and said outlet; said passage means defining a weir which extends generally upwardly above the level of said bottom opening to a predetermined distance below the level of the bottom of said slag opening and over which said molten metal flows to said outlet; said reservoir being defined in part by a side wall; said side wall having a top end; said slap opening being defined in said side wall in the form of a notch that is open at said top end of said wall; said notch being defined by (a) a rear surface extending downwardly from said side wall top end, (b) a front surface that is spaced forwardly of said rear surface and that extends downwardly from said side wall top end less than said rear surface, and (c) a bottom surface extending between the lower ends of said front and rear surfaces.
- 22. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully-tilted position, said apparatus comprising:
- a trough extending outwardly from said tap hole; said trough having a slag separating device at its distal end and defining a flow channel for directing said molten metal and slag to said device; said device defining an inlet for receiving said molten metal and slag and having an outlet from which said molten metal can be discharged; said device further defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said can be discharged; said device defining a bottom opening to said reservoir below the level of said slag opening and further defining a passage means for communicating between said bottom opening and said outlet; said passage means defining a weir which extends generally upwardly above the level of said bottom opening to a predetermined distance below the level of the bottom of said slag opening and over which said molten metal flows to said outlet, said slag opening being located at least as far outwardly as is said weir; said reservoir being defined in part by a side wall; said side wall having a top end; said slag opening being defined in said side wall in the form of a notch that is open at said top end of said wall; said notch being defined by (a) a rear surface extending downwardly from said side wall to pend, (b) a front surface that is spaced forwardly of said rear surface and that extends downwardly from said side wall top end less than said rear surface, and (c) a bottom surface extending between the lower ends of said front and rear surfaces.
- 23. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variable tiltable between an upright, non-tilted position and a fully-tilted position, said apparatus comprising:
- a trough extending outwardly from said tap hole; said trough having a slag separating device at its distal end and defining a flow channel for directing said molten metal and slag to said device; said device defining an inlet for receiving said molten metal and slag and having an outlet from which said molten metal can be discharged; said device further defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said can be discharged; said device defining a bottom opening to said reservoir below the level of said slag opening and further defining a passage means for communicating between said bottom opening and said outlet, said passage means defining a weir which extends generally upwardly above the level of said bottom opening to a predetermined distance below the level of the bottom of said slag opening and over which said molten metal flows to said outlet; said slag opening being located at least as far outwardly as is said weir; said passage means having a first portion extending rearwardly of said bottom opening; said bottom opening being located at least as far outwardly as is said weir.
- 24. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully-tilted position and which has a trough extending outwardly from said tap hole to define a flow channel for said molten metal and slag, said apparatus comprising:
- a device mounted on said trough; said device defining an inlet for receiving said molten metal and slag from said trough flow channel and having an outlet from which said molten metal can be discharged; said device defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged; said device further defining a bottom opening to said reservoir below the level of said slag opening and defining a passage means communicating between said bottom opening and said outlet and for defining a weir which extends generally upwardly above the level of said bottom opening to a predetermined level below the level of the bottom of said slag opening and over which said molten metal flows to said outlet; said reservoir being defined in part by a side wall; said side wall having a top end; said slag opening being defined in said side wall in the form of a notch that is open at said top end of said wall; said notch being defined by (a) a rear surface extending downwardly from said side wall top end, (b) a front surface that is spaced forwardly of said rear surface and that extends downwardly from said side wall.
- 25. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully-tilted position and which has a trough extending outwardly from said tap hole to define a flow channel for said molten metal and slag, said apparatus comprising:
- a device mounted on said trough; said device defining an inlet for receiving said molten metal and slag from said trough flow channel and having an outlet from which said molten metal can be discharged; said device defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged; said device further defining a bottom opening to said reservoir below the level of said slag opening and defining a passage means communicating between said bottom opening and said outlet and for defining a weir which extends generally upwardly above the level of said bottom opening to a predetermined level below the level of the bottom of said slag opening and over which said molten metal flows to said outlet; said passage means having a first portion extending rearwardly of said bottom opening; said bottom opening being located at least as far outwardly as is said weir.
- 26. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully-tilted position, said apparatus comprising:
- a trough extending outwardly from said tap hole for tilting with said furnace, said trough having a slag separating device at its distal end and defining a flow channel for directing said molten steel and slag to said device, said device being tiltable with said trough, said device defining an inlet for receiving said molten metal and slag and having an outlet from which said molten metal can be discharged, said device further defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged, said slag opening having a low point, said device defining a bottom opening to said reservoir and further defining a passage means for communicating between said bottom opening and said outlet, said device defining a weir over which said molten metal flows to said outlet, said weir having a top edge, said top edge of said weir being at an elevation below the level of said low point of said slag opening when said furnace is in said non-tilted position, said top edge of said weir being at an elevation at least as high as the elevation of said low point of said slag opening when said furnace is in said fully-tilted position.
- 27. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully-tilted position, said apparatus comprising:
- a trough extending outwardly from said tap hole for tilting with said furnace, said trough having a slag separating device at its distal end and defining a flow channel for directing said molten steel and slag to said device, said device being tiltable with said trough, said device defining an inlet for receiving said molten metal and slag and having an outlet from which said molten metal can be discharged, said device further defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged, said slag opening having a low point, said device defining a bottom opening to said reservoir and further defining a passage means for communicating between said bottom opening and said outlet, said device defining a weir over which said molten metal flows to said outlet, said weir having a top edge, said top edge of said weir being at an elevation below the elevation of said low point of said slag opening when said furnace is in said non-tilted position, said slag opening and said weir having a configuration wherein the difference between the elevation of the top edge of said weir and the elevation of the low point of said slag opening decreases as said furnace is tilted from said non-tilted position.
- 28. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position, and a fully-tilted position and which as a trough extending outwardly from said tap hole to define a flow channel for said molten metal and slag, said apparatus comprising:
- a device mounted on said trough for tilting with said trough, said device defining an inlet for receiving said molten metal and slag from said trough flow channel and having an outlet from which said molten metal can be discharged, said device defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged, said slag opening having a low point, said device further defining a bottom opening to said reservoir below the elevation of said slag opening and defining a passage means communicating between said bottom opening and said outlet, said passage means defining a weir which extends generally upwardly above the elevation of said bottom opening, said weir having a top edge, said top edge of said weir being at an elevation below the elevation of said low point of said slag opening when said furnace is in said non-tilted position, said top edge of said weir being at an elevation at least as high as the elevation of said low point of said slag opening when said furnace is in said fully-tilted position.
- 29. An apparatus for controlling slag in a tap discharge of molten metal and slag from a tap hole of a tilting furnace which is variably tiltable between an upright, non-tilted position and a fully-tilted position and which has a trough extending outwardly from said tap hole to define a flow channel for said molten metal and slag, said apparatus comprising:
- a device mounted on said trough for tilting with said trough, said defining an inlet for receiving said molten metal and slag from said trough flow channel and having an outlet from which said molten metal can be discharged, said device defining a reservoir communicating with said trough flow channel at said device inlet and defining a slag opening from which said slag can be discharged, said slag opening having a low point, said device further defining a bottom opening to said reservoir below the level of said slag opening and defining a passage means communicating between said bottom opening and said outlet, said passage means defining a weir which extends generally upwardly above the elevation of said bottom opening, said weir having a top edge, said top edge of said weir being at an elevation below the elevation of said low point of said slag opening when said furnace is in said non-tilted position, said slag opening and said weir having a configuration wherein the difference between the elevation of the top edge of said weir and the elevation of the low point of said slag opening decreases as said furnace is tilted from said non-tilted position.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of the copending U.S.A. patent application Ser. No. 07/722,524, filed on Jun. 27, 1991 by William S. Laszlo, now U.S. Pat. No. 5,133,244 which is a continuation-in-part of the copending U.S.A. patent application Ser. No. 07/560,598 filed on Jul. 31, 1990 by William S. Laszlo, now U.S. Pat. No. 5,173,243.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
Country |
7248767 |
Dec 1972 |
JPX |
0802376 |
Feb 1981 |
SUX |
Continuation in Parts (2)
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Number |
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722524 |
Jun 1991 |
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Parent |
560598 |
Jul 1990 |
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