Patent US2150800A successfully refreshed from Google Patents.
Patent US4165026A successfully refreshed from Google Patents.
US4165026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tundish with expendable lining and easily removable nozzle
Assignee: Foseco Trading AG
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Filing: 1978-03-24
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Granted: 1979-08-21
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Expires: 1998-03-24
Abstract
Abstract A tundish has a metal casing, an inner permanent lining, e.g. of refractory brick, an inner expendable lining within the permanent lining and formed of slabs of refractory heat-insulating material, and at least one nozzle including a highly refractory nozzle ring set into the base of the tundish by means of a sealing compound which remains unhardened during the use of the tundish for continuous casting of molten metal.
Inventors
- 👤 Ian J. Hazlehurst
- 👤 David C. Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:31
CPC Classifications
B; B22; B22D; B22D41/00; B22D41/50; B22D41/502
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
72 words
A tundish consisting essentially of an outer metal casing, a permanent lining of refractory material adjacent the casing, an expendable lining made up of a set of slabs of refractory heat insulating material, and at least one nozzle including a highly refractory nozzle ring set into the base of the tundish by means of a sealing compound which remains unhardened during the use of the tundish for continuous casting of molten metal.
Claim 2
Dependent Claim
72 words
A tundish consisting essentially of an outer metal casing, a permanent lining of refractory material adjacent the casing, an expendable lining made up of a set of slabs of refractory heat insulating material, and at least one nozzle including a highly refractory nozzle ring set into the base of the tundish by means of a sealing compound which remains unhardened during the use of the tundish for continuous casting of molten metal.
Claim 3
Dependent Claim
38 words
The tundish of claim 1 wherein said expendable liner is formed of a set of slabs of refractory heat insulating material having a known rate of consumability which is sufficiently long to complete a pour of molten metal.
Claim 4
Dependent Claim
21 words
The tundish of claim 2 said set of slabs conform in size with said inner wall and are in registry therewith.
Claim 5
Dependent Claim
25 words
The tundish of claim 1 wherein said permanent lining of refractory material is a refractory brick lining and said expendable liner slabs are positioned thereover.
Claim 6
Dependent Claim
25 words
The tundish of claim 1 wherein said permanent lining of refractory material is a monolithic refractory lining and said expendable liner slabs are positioned thereover.
Claim 7
Dependent Claim
20 words
The tundish of claim 1 wherein a quantity of exothermically reactive composition is provided in the region of each nozzle.
Claim 8
Dependent Claim
28 words
The tundish of claim 1 wherein a plurality of metal straps are located between said expendable lining and said permanent lining to facilitate stripping out the expendable lining.
Claim 9
Dependent Claim
23 words
The tundish of claim 1 wherein at least one of the linings is faced at least in part with a protective refractory dressing.
Claim 10
Dependent Claim
31 words
The tundish of claim 1 wherein the impact area of the tundish is lined with a material selected from the group consisting of high alumina brick, magnesite brick and silicon carbide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-08-20 | 1983-02-19 | 1983-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-20 | 1987-02-19 | 1987-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-20 | 1991-02-19 | 1991-08-21 | $7700.00 | Window Closed / Lapsed |