US3705713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bottom cooling device for shaft furnaces
Assignee: Mannesmann Demag AG
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Filing: 1970-11-02
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Granted: 1972-12-12
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Expires: 1990-11-02
Abstract
Abstract A bottom cooling device for shaft furnaces, particularly for blast furnaces, comprises an arrangement of cooling pipes behind a layer of lining bricks which are made of graphite or carbon. The lining bricks are adapted to contain a liquid metal which has a destructive effect on the bricks particularly a metal such as pig iron. The device includes a metal layer of high thermal conductivity which is arranged between a lining layer and a terminal plate and within which there is embedded a grid of cooling ducts. The cooling ducts form a secant in respect to the base circle of the furnace and they connect to a ring duct having diametrically opposite inlet and outlet connections.
Inventors
- 👤 Walter Wirtz
- 👤 Ulrich Genge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:07
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/10; C21B7/106
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
70 words
A bottom wall construction for shaft furnaces, particularly blast furnaces, and which is adapted to be arranged behind a layer of carbon lining bricks which are exposed, on the interior of the furnace, to a liquid metal particularly pig iron which has a destructive on the bricks, comprising a metal layer of highthermal conductivity, and a plurality of cooling ducts arranged in a pattern and embedded within the metal layer.
Claim 2
Dependent Claim
70 words
A bottom wall construction for shaft furnaces, particularly blast furnaces, and which is adapted to be arranged behind a layer of carbon lining bricks which are exposed, on the interior of the furnace, to a liquid metal particularly pig iron which has a destructive on the bricks, comprising a metal layer of highthermal conductivity, and a plurality of cooling ducts arranged in a pattern and embedded within the metal layer.
Claim 3
Dependent Claim
22 words
A bottom wall construction, according to claim 1, including a terminal steel plate arranged outside of said metal layer of high-thermal conductivity.
Claim 4
Dependent Claim
27 words
A bottom wall construction, according to claim 1, wherein said highly conductive layer comprises an aluminum metal material said cooling ducts comprising cooling pipes made of copper.
Claim 5
Dependent Claim
96 words
A furnace construction comprising an outer shell, an inner tamping layer, a brickwork lining within said inner tamping layer forming the interior wall of said furnace, said furnace having a bottom wall comprising an interior layer of graphite bricks, an intermediate conductive layer assembly comprising a metal layer of high-thermal conductivity, a plurality of tubes arranged in a pattern and adapted to be interconnected for the flow of a coolant therethrough and embedded within said metal layer of high-thermal conductivity, and a terminal steel plate arranged on the exterior of said metal layer of high-thermal conductivity.
Claim 6
Dependent Claim
96 words
A furnace construction comprising an outer shell, an inner tamping layer, a brickwork lining within said inner tamping layer forming the interior wall of said furnace, said furnace having a bottom wall comprising an interior layer of graphite bricks, an intermediate conductive layer assembly comprising a metal layer of high-thermal conductivity, a plurality of tubes arranged in a pattern and adapted to be interconnected for the flow of a coolant therethrough and embedded within said metal layer of high-thermal conductivity, and a terminal steel plate arranged on the exterior of said metal layer of high-thermal conductivity.
Claim 7
Dependent Claim
32 words
A furnace construction, according to claim 4, wherein said conductive layer comprises hollow aluminum plates, said cooling pipes having an inlet and an outlet for the passage of a cooling medium therethrough.
Claim 8
Dependent Claim
31 words
A furnace construction, according to claim 4, wherein said cooling ducts are arranged in a pattern such that each tube forms a secant to a base circle of said furnace wall.
Claim 9
Dependent Claim
35 words
A furnace wall construction, according to claim 4, wherein said cooling ducts extend outside said furnace wall, and a socket connected to said ducts having a closable opening for the introduction of a cleaning agent.
Claim 10
Dependent Claim
42 words
A furnace construction, according to claim 4, including an inlet connected to said cooling ducts for the inflow of the cooling medium thereto and an outlet connected to said duct for the return flow of the cooling medium arranged above said inlet.
Claim 11
Dependent Claim
23 words
A furnace construction, according to claim 8, including compensator means connected within each of said ducts and permitting longitudinal expansion and contraction thereof.
Claim 12
Dependent Claim
55 words
A furnace wall construction, according to claim 4, including an annular connector ring connected to the ends of said ducts having inlet and outlet means for the cooling medium, said ducts extending in spaced parallel relationship and wherein the longest of said ducts have a diameter which is larger than the shortest of said ducts.
Claim 13
Dependent Claim
27 words
A furnace construction, according to claim 4, including means for circulating a cooling medium through said ducts, said cooling medium comprising a portion thereof which is glycerin.
Claim 14
Independent Claim
58 words
A method for producing a highly conductive assembly for the bottom of a shaft furnace using a casting mold, comprising arranging a plurality of cooling pipes within the mold in spaced parallel relationship, and then applying a metal to completely cover the pipes and be cast thereover while regulating the temperature of the pipes from the interiors thereof.
Claim 15
Independent Claim
58 words
A method for producing a highly conductive assembly for the bottom of a shaft furnace using a casting mold, comprising arranging a plurality of cooling pipes within the mold in spaced parallel relationship, and then applying a metal to completely cover the pipes and be cast thereover while regulating the temperature of the pipes from the interiors thereof.
Claim 16
Dependent Claim
57 words
A method according to claim 12, wherein the cooling ducts are madeup of a plurality of straight single pipe having a bar-shaped cross-sectional form and wherein the pipes are formed within a frame of annular configuration, comprising forming the central pipes of a standard length interconnecting the frame and forming the others of shorter length by cutting.
References Cited (Backward Citations)
US2514871A
Cited
US2673083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |