US3825241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for introducing gas to hot metal in a bottom pour vessel
Assignee: United States Steel Corp
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Filing: 1973-10-26
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Granted: 1974-07-23
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Expires: 1993-10-26
Abstract
Abstract A sliding gate apparatus for controlling the pouring of hot metal from a bottom pour vessel into a continuous casting mold is disclosed. The gate includes a permeable refractory block positioned beneath the vessel pouring opening when the gate is in the active position. The permeable plug has a low permeability center, thus any gas introduced to the hot metal through the plug will tend to flow near the sides of the vessel opening.
Inventors
- 👤 J Shapland
- 👤 W Township
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:04
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/14; B22D41/22; B22D41/42; H; H02; H02J; H02J7/00; H02J7/02; H02J7/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A slide-through gate for closing the pouring nozzle of a molten-metal containing bottom-pour vessel, said gate comprising a first refractory body, a second refractory body set in said first refractory body and having an upper surface no higher than the upper surface of said first refractory body, said second refractory body having an annular portion of higher permeability than its center portion, said refractory bodies forming a gas distribution chamber in said gate, and means connected to said gate and communicating with said chamber for introducing gas to said vessel through said second refractory body.
Claim 2
Dependent Claim
95 words
A slide-through gate for closing the pouring nozzle of a molten-metal containing bottom-pour vessel, said gate comprising a first refractory body, a second refractory body set in said first refractory body and having an upper surface no higher than the upper surface of said first refractory body, said second refractory body having an annular portion of higher permeability than its center portion, said refractory bodies forming a gas distribution chamber in said gate, and means connected to said gate and communicating with said chamber for introducing gas to said vessel through said second refractory body.
Claim 3
Dependent Claim
26 words
A gate according to claim 1 wherein said second refractory includes a central refractory core of lower permeability than the surrounding portion of said second refractory.
Claim 4
Dependent Claim
13 words
A gate according to claim 2 wherein said central refractory core is non-permeable.
Claim 5
Dependent Claim
20 words
A gate according to claim 1 wherein said second refractory has a thick central portion and a thinner annular portion.
Claim 6
Dependent Claim
40 words
A gate according to claim 1 wherein said second refractory is provided with a number of holes substantially normal to the upper surface and extending from said chamber upwards into said second refractory to create a zone of increased permeability.
Claim 7
Dependent Claim
15 words
A gate according to claim 5 wherein said holes create a ring of increased permeability.
Claim 8
Dependent Claim
14 words
A gate according to claim 1 wherein said chamber is beneath said second body.
Claim 9
Dependent Claim
16 words
A gate according to claim 1 wherein said chamber encircles a portion of said second body.
Claim 10
Dependent Claim
18 words
A gate according to claim 1 further comprising an impermeable metal jacket covering the sides of said gate.
Claim 11
Dependent Claim
18 words
A gate according to claim 9 further comprising an impermeable metal jacket covering the bottom of said gate.
Claim 12
Dependent Claim
194 words
In combination, a bottom pour vessel having an outlet in its bottom wall, a nozzle plate having a pouring nozzle therein fixed to said vessel beneath said outlet and having said nozzle aligned with said outlet, and carrying a gas pipe in the body of said nozzle plate extending from the bottom surface of said nozzle plate to another surface of said nozzle plate, a slidable gate mounted beneath said nozzle plate for closing said pouring nozzle; said gate comprising: a fiRst refractory body a second refractory body set in said first refractory body and having an upper surface no higher than the upper surface of said first refractory body, said second refractory body having an annular portion of higher permeability than its center portion, said refractory bodies forming a gas distribution chamber in said gate, and a gas pipe communicating with said chamber and extending to the upper surface of said gate where it communicates with and is aligned with said gas pipe in said nozzle plate; and means communicating with said gas pipe in said nozzle plate for introducing gas to said vessel through said gas pipes and said second refractory body.
Claim 13
Dependent Claim
194 words
In combination, a bottom pour vessel having an outlet in its bottom wall, a nozzle plate having a pouring nozzle therein fixed to said vessel beneath said outlet and having said nozzle aligned with said outlet, and carrying a gas pipe in the body of said nozzle plate extending from the bottom surface of said nozzle plate to another surface of said nozzle plate, a slidable gate mounted beneath said nozzle plate for closing said pouring nozzle; said gate comprising: a fiRst refractory body a second refractory body set in said first refractory body and having an upper surface no higher than the upper surface of said first refractory body, said second refractory body having an annular portion of higher permeability than its center portion, said refractory bodies forming a gas distribution chamber in said gate, and a gas pipe communicating with said chamber and extending to the upper surface of said gate where it communicates with and is aligned with said gas pipe in said nozzle plate; and means communicating with said gas pipe in said nozzle plate for introducing gas to said vessel through said gas pipes and said second refractory body.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |