US3608621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous casting apparatus with controlled overflow casting tube in tundish
Assignee: Schloemann AG
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Filing: 1970-04-27
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Granted: 1971-09-28
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Expires: 1990-04-27
Abstract
Abstract In a method and apparatus for controlling the flow of molten metal from a tundish into a continuous casting mold a casting tube is provided in the tundish opening through the bottom thereof with a rising tube around the casting tube extending above the upper end of the casting tube and above the level of molten metal in the mold. Openings in the walls of the rising tube let metal into it from the tundish. A gas, preferably inert, is fed into the rising tube to mix metal to rise up and overflow into the casting tube and down into the mold.
Inventors
- 👤 Georg Bollig
- 👤 Kristof Tromel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:55
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/10; B22D11/11; B22D11/116; B22D11/118; B22D11/16; B22D11/18; B22D11/181
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
Apparatus for controlling the flow of molten metal from a tundish into a continuous casting mold comprising a casting tube mounted in the tundish opening through the bottom thereof with its upper, open end extending upwardly above the bottom of the tundish to a height above the normal level of molten metal in the tundish, a rising tube in the tundish around the casting tube with space therebetween and with its upper end above the upper end spaced of the casting tube, said rising tube having at least one lower opening through it for metal in the tundish to flow into the space between said tubes, and means for controllably supplying gas to the metal in the lower part of said space to mix therewith and cause said metal to rise up said space and overflow into the casting tube.
Claim 2
Dependent Claim
140 words
Apparatus for controlling the flow of molten metal from a tundish into a continuous casting mold comprising a casting tube mounted in the tundish opening through the bottom thereof with its upper, open end extending upwardly above the bottom of the tundish to a height above the normal level of molten metal in the tundish, a rising tube in the tundish around the casting tube with space therebetween and with its upper end above the upper end spaced of the casting tube, said rising tube having at least one lower opening through it for metal in the tundish to flow into the space between said tubes, and means for controllably supplying gas to the metal in the lower part of said space to mix therewith and cause said metal to rise up said space and overflow into the casting tube.
Claim 3
Dependent Claim
18 words
Apparatus according to claim 1 comprising a pipe conducting gas to the lower part of the rising tube.
Claim 4
Dependent Claim
28 words
Apparatus according to claim 1 comprising a gas-permeable refractory brick located in the lower part of the rising tube and a pipe conducting gas to said refractory brick.
Claim 5
Dependent Claim
18 words
Apparatus according to claim 3 in which said refractory brick is the base block of the rising tube.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 1 in which the casting tube is concentrically surrounded by the rising tube.
Claim 7
Dependent Claim
48 words
Apparatus according to claim 1 in which the upper casting tube and the rising tube form a unit connected to a lower casting tube that is mounted on the bottom of the tundish and opens therethrough with a sealing surface between the upper and the lower casting tube.
Claim 8
Dependent Claim
32 words
Apparatus according to claim 1 in which the gas is supplied from above through ducts in the wall of the rising tube which open into the lower part of the rising bore.
Claim 9
Dependent Claim
32 words
Apparatus according to claim 7 in which said ducts in the wall of the rising tube lead to a ring of gas-permeable refractory brick mounted in the bore of the rising tube.
References Cited (Backward Citations)
GB781276A
Cited
US3310850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |