US4014531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tundish for the continuous casting of steel
Assignee: Aikoh Co Ltd
•
Filing: 1975-04-28
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Granted: 1977-03-29
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Expires: 1995-04-28
Abstract
Abstract A tundish for the continuous casting of steel characterized by lining thereto a moulding which consists of 50-80% by weight of a refractory which bases on silicic anhydride having approximately less than 100 mesh, 2-10% by weight of a refractory clay, 8-20% by weight of a refractory fibrous material and/or a porous refractory and 4-10% by weight of an organic binder, and if necessary 6-10% by weight of a refractory other than silicic anhydride.
Inventors
- 👤 Masaru Takashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:48
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/02; B24D3/04; B24D3/06; B24D3/08; B22; B22D; B22D41/00; B22D41/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A tundish for the continuous casting of steel characterized by having an inner lining of a moulding which comprises from 50 to 80 percent by weight of a siliceous refractory, based on silicic anhydride, having a particle size less than 100 mesh, from 2 to 10 percent by weight of a refractory clay, from 8 to 20 percent by weight of a refractory fibrous material, and (d) from 4 to 10 percent by weight of an organic binder, with the surface of said molding which is adapted to be in contact with molten metal being impregnated with at least one material selected from the group consisting of colloidal silica, water glass, aluminum phosphate, a suspension of zircon sands, a suspension of alumina, and a suspension of silicic anhydride.
Claim 2
Dependent Claim
128 words
A tundish for the continuous casting of steel characterized by having an inner lining of a moulding which comprises from 50 to 80 percent by weight of a siliceous refractory, based on silicic anhydride, having a particle size less than 100 mesh, from 2 to 10 percent by weight of a refractory clay, from 8 to 20 percent by weight of a refractory fibrous material, and (d) from 4 to 10 percent by weight of an organic binder, with the surface of said molding which is adapted to be in contact with molten metal being impregnated with at least one material selected from the group consisting of colloidal silica, water glass, aluminum phosphate, a suspension of zircon sands, a suspension of alumina, and a suspension of silicic anhydride.
Claim 3
Dependent Claim
37 words
A tundish of claim 1 which in addition contains from about 6 to about 10 percent by weight of at least one refractory material selected from the group consisting of chamotte, peridotite, magnesia, magnesite, dolomite and alumina.
Claim 4
Dependent Claim
23 words
The tundish of claim 1 wherein said siliceous refractory material is selected from the group consisting of siliceous sand, silica and mixtures thereof.
Claim 5
Dependent Claim
25 words
The tundish of claim 1 wherein the refractory fiberous material is selected from the group consisting of asbestos, rock wool, slag wool and mixtures thereof.
References Cited (Backward Citations)
US2124865A
Cited
US3203689A
Cited
US3229970A
Cited
US3737489A
Cited
US3678143A
Cited
US3917110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |