US4294431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing and maintaining a wear-lining of a steel converter and a steel converter having such a lining
Assignee: Hoogovens Ijmuiden BV
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Filing: 1979-07-06
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Granted: 1981-10-13
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Expires: 1999-07-06
Abstract
Abstract The basic wear-lining of a steel converter is made of refractory material at least partly composed of burnt magnesite. Maintenance is performed by spraying refractory material onto this lining or by "slagging-in". The effect of this maintenance procedure, in terms of the duration of the lining, are improved if the particles of the magnesite component of the wear-lining contain on average more than 61/4 percent monticellite. Material of this kind has not in the past been found suitable for a wear-lining.
Inventors
- 👤 Adam Steen
- 👤 Hendrik M. Verhoog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:10
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/16; F27D1/1678; F27D1/1684; C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/043; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/44; F27D1/1636; F27D2001/1605; F27D2001/161
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
In a method of operating a steel converter which has a basic wear-lining formed of refractory material at least partly composed of burnt magnesite, including the step of performing maintenance on the said lining by intermittently spraying refractory material onto the wear-lining and/or slagging-in while the wear-lining is hot, the improvement that the particles of the magnesite component of the wear-lining contain on average more than 6% monticellite.
Claim 2
Dependent Claim
68 words
In a method of operating a steel converter which has a basic wear-lining formed of refractory material at least partly composed of burnt magnesite, including the step of performing maintenance on the said lining by intermittently spraying refractory material onto the wear-lining and/or slagging-in while the wear-lining is hot, the improvement that the particles of the magnesite component of the wear-lining contain on average more than 6% monticellite.
Claim 3
Dependent Claim
29 words
Method according to claim 1 wherein said particles of the magnesite component of the wear-lining contain not less than 2.7% and not more than 6% of SiO 2 .
Claim 4
Dependent Claim
17 words
Method according to one of claims 1 and 2 wherein the wear-lining is at least 50% MgO.
Claim 5
Dependent Claim
27 words
Method according to one of claims 1 and 2 wherein the material of wear-lining is a mixture of about equal amounts of burnt magnesite and burnt dolomite.
Claim 6
Dependent Claim
63 words
Method of providing and maintaining a wear-lining of a steel converter, comprising the steps of (a) initially providing a basic wear-lining of refractory material which is at least partly composed of burnt magnesite which consists of particles containing on average more than 6% monticellite and (b), during the operation of the steel converter, intermittently spraying refractory material onto the hot wear-lining and/or slagging-in.
Claim 7
Dependent Claim
63 words
Method of providing and maintaining a wear-lining of a steel converter, comprising the steps of (a) initially providing a basic wear-lining of refractory material which is at least partly composed of burnt magnesite which consists of particles containing on average more than 6% monticellite and (b), during the operation of the steel converter, intermittently spraying refractory material onto the hot wear-lining and/or slagging-in.
Claim 8
Dependent Claim
62 words
A steel converter having a basic wear-lining formed of refractory material at least partly composed of burnt magnesite, wherein, in order to improve the wear-resistance of the lining when maintained during operation of the converter by spraying refractory material onto the hot wear-lining and/or by slagging-in, the particles of the magnesite component of the wear-lining contain on average more than 6% monticellite.
Claim 9
Dependent Claim
62 words
A steel converter having a basic wear-lining formed of refractory material at least partly composed of burnt magnesite, wherein, in order to improve the wear-resistance of the lining when maintained during operation of the converter by spraying refractory material onto the hot wear-lining and/or by slagging-in, the particles of the magnesite component of the wear-lining contain on average more than 6% monticellite.
Claim 10
Dependent Claim
31 words
A steel converter according to claim 6 wherein said particles of the magnesite component of the wear-lining contain not less than 2.7% and not more than 6% of SiO 2 .
Claim 11
Dependent Claim
19 words
A steel converter according to one of claims 6 and 7 wherein the wear-lining is at least 50% MgO.
Claim 12
Dependent Claim
28 words
A steel converter according to one of claims 6 and 7 the material of wear-lining is a mixture of about equal amounts of burnt magnesite and burnt dolomite.
References Cited (Backward Citations)
US2801099A
Cited
US3994676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |