Patent US6655955B2 successfully refreshed from Google Patents.
US6655955B2
Expired / Lapsed
US
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Coolable arched roof
Assignee: Kanadevia Inova AG
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Filing: 2002-12-31
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Granted: 2003-12-02
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Expires: 2022-12-31
Abstract
Abstract A coolable arched roof for a high-temperature melting furnace having a furnace interior. At least the following layers are present on that side of a layer of refractory bricks, which is remote from the furnace interior: a sealing layer, which is used to seal the furnace interior against the leakage or penetration of gas; an insulation layer having a thermally insulating action; and a cooling layer, which is designed to carry a cooling fluid. The arrangement of layers results in an increased gastightness and prevents premature aging of the refractory bricks.
Inventors
- 👤 Erwin Wachter
- 👤 Klaus Zoss
- 👤 Bruno Andreoli
- 👤 Werner Seglias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:06
CPC Classifications
F; F23; F23M; F23M5/00; F23M5/08
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
97 words
A coolable arched roof for a high-temperature melting furnace having a furnace interior, the arched roof comprising: at least one layer of refractory bricks having a side remote from the furnace interior; and an arrangement of layers on the side of the at least one layer of refractory bricks which is remote from the furnace interior, the arrangement of layers including: a sealing layer arranged so as to seal the furnace interior against an escape or penetration of gas; an insulation layer with a thermally insulating action; and a cooling layer designed to carry a cooling fluid.
Claim 2
Dependent Claim
97 words
A coolable arched roof for a high-temperature melting furnace having a furnace interior, the arched roof comprising: at least one layer of refractory bricks having a side remote from the furnace interior; and an arrangement of layers on the side of the at least one layer of refractory bricks which is remote from the furnace interior, the arrangement of layers including: a sealing layer arranged so as to seal the furnace interior against an escape or penetration of gas; an insulation layer with a thermally insulating action; and a cooling layer designed to carry a cooling fluid.
Claim 3
Dependent Claim
44 words
The arched roof as defined in claim 1 , wherein one of dissipation of heat effected by the cooling fluid and a thickness and material of the layers are such so that mean temperature in the refractory bricks does not exceed a predetermined temperature.
Claim 4
Dependent Claim
23 words
The arched roof as defined in claim 2 , wherein the predetermined temperature of the refractory bricks is between 1300 and 1600° C.
Claim 5
Dependent Claim
21 words
The arched roof as defined in claim 3 , wherein the predetermined temperature of the refractory bricks is about 1450° C.
Claim 6
Dependent Claim
44 words
The arched roof as defined in claim 2 , wherein the thickness and material of the layers and/or the dissipation of heat effected by the cooling fluid are such that a temperature of the sealing layer does not fall below a predetermined minimum temperature.
Claim 7
Dependent Claim
24 words
The arched roof as defined in claim 5 , wherein the minimum temperature o f the sealing layer is between 100 and 300° C.
Claim 8
Dependent Claim
20 words
The arched roof as defined in claim 6 , wherein the minimum temperature of the sealing layer is 200° C.
Claim 9
Dependent Claim
17 words
The arched roof as defined in claim 1 , wherein the sealing layer comprises a metal foil.
Claim 10
Dependent Claim
25 words
The arched roof as defined in claim 8 , wherein the metal foil is a steel foil with a thickness of 50 to 300 mm.
Claim 11
Dependent Claim
20 words
The arched roof as defined in claim 9 , wherein the steel foil h as a thickness of 250 mm.
Claim 12
Dependent Claim
25 words
The arched roof as defined in claim 8 , wherein the sealing layer comprises a glass fiber fabric which is joined to the metal foil.
Claim 13
Dependent Claim
35 words
The arched roof as defined in claim 1 , wherein the insulating layer has a thickness in a range from 50 to 200 mm, and a thermal conductivity in the range from 0.05 to 0.2.
Claim 14
Dependent Claim
25 words
The arched roof as defined in claim 8 , wherein the insulating layer consists of one of insulating fabric and felt based on rock wool.
Claim 15
Dependent Claim
49 words
The arched roof as defined in claim 1 , wherein the cooling layer comprises at least one covering layer which rests on the insulating layer and is made from a thermally conductive material, and pipes for the cooling fluid which are connected to the covering layer via heat bridges.
Claim 16
Dependent Claim
33 words
The arched roof as defined in claim 14 , wherein the pipes are connected to thermally conductive contact elements which run parallel to the covering layer and are in large area contact therewith.
Claim 17
Dependent Claim
17 words
The arched roof as defined in claim 14 , wherein the covering layer comprises a metal foil.
Claim 18
Dependent Claim
20 words
The arched roof as defined in claim 16 , wherein the metal foil is reinforced by a glass fiber fabric.
Claim 19
Dependent Claim
15 words
The arched roof as defined in claim 1 , wherein the cooling fluid is water.
Claim 20
Dependent Claim
26 words
The arched roof as defined in claim 1 , wherein dissipation of heat effected by the cooling fluid is between 1000 and 5000 W/m 2 .
Claim 21
Dependent Claim
24 words
The arched roof as defined in claim 19 , wherein the dissipation of heat affected by the cooling fluid is 3000 W/m 2 .
Claim 22
Dependent Claim
88 words
A melting furnace, comprising an arched roof having at least one layer of refractory bricks having a side remote from the furnace interior, and an arrangement of layers on the side of the at least one layer of refractory bricks which is remote from the furnace interior, the arrangement of layers including a sealing layer arranged so as to seal the furnace interior against an escape or penetration of gas, an insulation layer with a thermally insulating action, and a cooling layer designed to carry a cooling fluid.
Claim 23
Dependent Claim
88 words
A melting furnace, comprising an arched roof having at least one layer of refractory bricks having a side remote from the furnace interior, and an arrangement of layers on the side of the at least one layer of refractory bricks which is remote from the furnace interior, the arrangement of layers including a sealing layer arranged so as to seal the furnace interior against an escape or penetration of gas, an insulation layer with a thermally insulating action, and a cooling layer designed to carry a cooling fluid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-12-01 | 2007-06-02 | 2007-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-12-01 | 2011-06-02 | 2011-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-12-01 | 2015-06-02 | 2015-12-02 | $7700.00 | Window Closed / Lapsed |