US4143104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repairing damaged refractory walls by gunning
Assignee: Hoogovens Ijmuiden BV
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Filing: 1977-01-12
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Granted: 1979-03-06
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Expires: 1997-01-12
Abstract
Abstract A method of repairing refractory walls, especially coke-oven walls is disclosed. The invention utilizes a refractory repair material selected in accordance with the wall to be repaired and not less than 5.5 nor more than 20% binder. The repair material is sprayed onto a hot wall to be repaired and the binder adheres thereto by sintering with at least the boundary surfaces of the binder undergoing vitrification.
Inventors
- 👤 Jan T. van Konijnenburg
- 👤 Johannes A. M. Butter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:03
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/16; F27D1/1636; F27D1/1642; C; C04; C04B; C04B35/00; C04B35/66; C10; C10B; C10B29/00; C10B29/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A method for repairing a damaged coke-oven wall comprising applying a gunning composition containing about 30% water and the remainder being solid material containing 75 to 80% SiO 2 as Cristobalite or Trydenite, 7 to 12% Borax (Na 2 B 4 O 7 . 10 H 2 O) as a binder, 4 to 8% ground window glass and 5.5 to 10% Bentonite to the damaged wall portion or portions while the said portion or portions are at elevated temperatures and vitrifying the binder on contact with the wall portion or portions at at least the boundary surfaces, said composition being selected in accordance with the composition of the main component of the refractory wall.
Claim 2
Independent Claim
114 words
A method for repairing a damaged coke-oven wall comprising applying a gunning composition containing about 30% water and the remainder being solid material containing 75 to 80% SiO 2 as Cristobalite or Trydenite, 7 to 12% Borax (Na 2 B 4 O 7 . 10 H 2 O) as a binder, 4 to 8% ground window glass and 5.5 to 10% Bentonite to the damaged wall portion or portions while the said portion or portions are at elevated temperatures and vitrifying the binder on contact with the wall portion or portions at at least the boundary surfaces, said composition being selected in accordance with the composition of the main component of the refractory wall.
References Cited (Backward Citations)
GB621092A
Cited
US2809126A
Cited
US2968083A
Cited
DE1171323B
Cited
US3490930A
Cited
US3641229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |