Patent US2794342A successfully refreshed from Google Patents.
Patent US3849587A successfully refreshed from Google Patents.
US3849587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling devices for protecting refractory linings of furnaces
Assignee: Hatch Associates Ltd
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Filing: 1973-12-13
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Granted: 1974-11-19
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Expires: 1993-12-13
Abstract
Abstract Erosion and penetration of refractory linings in high temperature furnaces are prevented by placing through the furnace walls and into the linings solid cooling members of high thermal conductivity. The length, cross-sectional area, spacing and material of the solid members are selected so as to avoid melting thereof and to conduct sufficient heat from the lining to limit erosion of the lining and, in applications in which molten process materials are in contact with the refractory lining, to maintain some thickness of refractory or frozen process material between the ends of the cooling members and the bath of molten process material.
Inventors
- 👤 G Hatch
- 👤 B Wasmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:39
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/10; F; F27; F27B; F27B3/00; F27B3/10; F27B3/24; F27D; F27D1/00; F27D1/12; F27D9/00; F27D2009/0002; F27D2009/0056; F27D2009/0062
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
92 words
A method for protecting the refractory lining of a furnace operating at high temperatures comprising placing solid cooling members of high thermal conductivity into the lining, the outer portions of the cooling members remaining outside of the refractory lining, said cooling members being substantially devoid of water cooled channels in the portions thereof located Inside the lining, and selecting the length, cross-sectional area, spacing and material of said cooling members to avoid melting thereof and to result in withdrawal of sufficient heat from the furnace lining to limit erosion of the lining.
Claim 2
Independent Claim
92 words
A method for protecting the refractory lining of a furnace operating at high temperatures comprising placing solid cooling members of high thermal conductivity into the lining, the outer portions of the cooling members remaining outside of the refractory lining, said cooling members being substantially devoid of water cooled channels in the portions thereof located Inside the lining, and selecting the length, cross-sectional area, spacing and material of said cooling members to avoid melting thereof and to result in withdrawal of sufficient heat from the furnace lining to limit erosion of the lining.
Claim 3
Dependent Claim
79 words
A method as claimed in claim 1 in which the solid cooling members are installed in the sidewall lining of a furnace near or below the surface of a bath of molten process material, and additionally comprising withdrawing sufficient heat through the solid coolers to maintain a thickness of solid material consisting of refractory lining material, frozen process material or mixtures thereof around the coolers and between the hot ends of the cooling members and the molten process material.
Claim 4
Dependent Claim
48 words
A method as claimed in claim 2 in which the molten process material is highly fluid with a tendency to penetrate cracks or void spaces in the lining, and maintaining the boundary between frozen and molten process material a desired distance from the outside of the furnace wall.
Claim 5
Dependent Claim
27 words
A method as claimed in claim 2 wherein the ends of the cooling members outside of the refractory lining are cooled by the circulation of water therein.
Claim 6
Dependent Claim
26 words
A method as claimed in claim 2 wherein the ends of the cooling members outside of the refractory lining are cooled by finned surfaces integral therewith.
Claim 7
Dependent Claim
27 words
A method as claimed in claim 1 wherein the cooling members are installed in an electric arc furnace at the arc flare zones of the furnace walls.
Claim 8
Dependent Claim
23 words
A method as claimed in claim 2 wherein the cooling members are installed slanted upwardly from a bath of molten material being treated.
Claim 9
Dependent Claim
109 words
An arrangement for protecting the refractory lining of a furnace operating at high temperatures, said lining having an inner face subjected to said high temperatures, comprising solid cooling members of high thermal conductivity embedded in the lining, the outer portions of the cooling members being located outside of the refractory lining, said cooling members being substantially devoid of any water cooling channels in the portions thereof located inside the lining of the furnace, and the length, cross-sectional area, spacing and material of said cooling members being selected to avoid melting thereof and to result in withdrawal of sufficient heat from the furnace lining to limit erosion of the lining.
Claim 10
Dependent Claim
109 words
An arrangement for protecting the refractory lining of a furnace operating at high temperatures, said lining having an inner face subjected to said high temperatures, comprising solid cooling members of high thermal conductivity embedded in the lining, the outer portions of the cooling members being located outside of the refractory lining, said cooling members being substantially devoid of any water cooling channels in the portions thereof located inside the lining of the furnace, and the length, cross-sectional area, spacing and material of said cooling members being selected to avoid melting thereof and to result in withdrawal of sufficient heat from the furnace lining to limit erosion of the lining.
Claim 11
Dependent Claim
34 words
An arrangement as claimed in claim 8 in which the solid cooling members are installed in the sidewall lining of a furnace near or below the surface of a bath of molten process material.
Claim 12
Dependent Claim
32 words
An arrangement as claimed in claim 8 wherein the cooling members are a material selected from the group consisting of copper, graphite, iron, stainless steel, molybdenum, titanium and aluminum and combinations thereof.
Claim 13
Dependent Claim
15 words
An arrangement as claimed in claim 8 wherein the cooling members are high purity copper.
Claim 14
Dependent Claim
19 words
An arrangement as defined in claim 8 wherein cooling members are installed in the sidewalls of an electric furnace.
Claim 15
Dependent Claim
24 words
An arrangement as defined in claim 9 wherein the ends of the cooling members outside of the refractory lining have water cooling passages therein.
Claim 16
Dependent Claim
19 words
An arrangement as defined in claim 9 wherein the cooling members have finned surfaces integral with their outside ends.
Claim 17
Dependent Claim
27 words
An arrangement as defined in claim 8 wherein the cooling members are installed in an electric arc furnace at the arc flare zones of the furnace walls.
Claim 18
Dependent Claim
23 words
An arrangement as claimed in claim 9 wherein the cooling members are installed slanted upwardly from a bath of molten material being treated.
Claim 19
Dependent Claim
18 words
An arrangement as claimed in claim 8 wherein cooling members are installed in the roof of the furnace.
Claim 20
Dependent Claim
17 words
An arrangement as claimed in claim 8 wherein cooling members are installed around tapholes in the furnace.
Claim 21
Dependent Claim
21 words
An arrangement as claimed in claim 8 wherein cooling members are installed around gas off-takes and feed ports on the furnace.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |