US3820770A - Sub hearth construction for metallurgical furnaces - Google Patents
Sub hearth construction for metallurgical furnaces Download PDFInfo
- Publication number
- US3820770A US3820770A US00382800A US38280073A US3820770A US 3820770 A US3820770 A US 3820770A US 00382800 A US00382800 A US 00382800A US 38280073 A US38280073 A US 38280073A US 3820770 A US3820770 A US 3820770A
- Authority
- US
- United States
- Prior art keywords
- hearth
- carbon
- sub
- construction
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 10
- 239000012809 cooling fluid Substances 0.000 claims abstract description 4
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 11
- 229910052863 mullite Inorganic materials 0.000 claims description 11
- 230000004927 fusion Effects 0.000 claims description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 2
- 229910052593 corundum Inorganic materials 0.000 claims 2
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 2
- 229910052681 coesite Inorganic materials 0.000 claims 1
- 229910052906 cristobalite Inorganic materials 0.000 claims 1
- 239000000377 silicon dioxide Substances 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 229910052682 stishovite Inorganic materials 0.000 claims 1
- 229910052905 tridymite Inorganic materials 0.000 claims 1
- 229910052845 zircon Inorganic materials 0.000 claims 1
- 239000011819 refractory material Substances 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 230000004888 barrier function Effects 0.000 description 13
- 229910052742 iron Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 229910006501 ZrSiO Inorganic materials 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
- C21B7/06—Linings for furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
- C21B7/106—Cooling of the furnace bottom
Definitions
- a bottom-cooled blast furnace hearth is conventionally installed with carbon side walls and a plug made up of layers of fireclay block disposed on a base made up of a plurality of layers of carbon blocks or beams.
- heat is removed from the lowermost layer of carbon beams or blocks by 'means of cooling air or water circulated through pipes that are installed in the lowermost layer of carbon beams or blocks.
- the fireclay plug of a conventional sub-hearth construction may be lost in the first 3 to 6 months of the furnace campaign, allowing molten iron to filter into the pores of the carbon beams thereby increasing the heat conductivity thereof.
- the molten iron on the hearth floor might sometimes be undersaturated with respect to carbon, and, in the absence of the fireclay plug, the deficient amount of carbon is obtained from the carbon beams. This results in erosionof the carbon beams or blocks.
- more important is the heat loss from the hearth throughthe carbon beams orblocks which normally have a heat conductivity of approximately 100 Btu/sq ft/F/hr/inch. The removal of this heatfro m the carbon beams or blocks is costly because of the coolingwater or air whichhas to be circulated in the pipes disposed in the earbon beams orblocks.
- FIG. 1 is a diagrammatic vertical section view of the prior art sub-hearth construction of a blast furnace.
- FIG. 3 is a modification of the sub-hearth construction shown in FIG. 2.
- FIG. 4 is another modification of the sub-hearth construction shown in FIG. 2.
- the barrier layer 12 may extend co-extensively with the carbon beams.
- Sub-hearth construction as defined by claim 1 including a conduit for cooling fluid extending through the lowermost of said plurality of layers of carbon.
- Sub-hearth construction as defined by claim 1 in which said layer of non-iron-reactive material is surrounded by said carbon inner lining.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Blast Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00382800A US3820770A (en) | 1973-07-26 | 1973-07-26 | Sub hearth construction for metallurgical furnaces |
AU69526/74A AU6952674A (en) | 1973-07-26 | 1974-05-29 | Metallurgical furnaces |
JP49068253A JPS5050204A (de) | 1973-07-26 | 1974-06-17 | |
IT69040/74A IT1014406B (it) | 1973-07-26 | 1974-06-27 | Struttura di sottocrogiuolo per forni metallurgici |
DE2432992A DE2432992A1 (de) | 1973-07-26 | 1974-07-09 | Unterherdkonstruktion fuer metallurgische oefen |
GB3192974A GB1427646A (en) | 1973-07-26 | 1974-07-18 | Sub-hearth construction for metallurgical furnaces |
BE146863A BE818002A (fr) | 1973-07-26 | 1974-07-23 | Infrastructure de creuset pour fours metallurgiques |
FR7425719A FR2238762B3 (de) | 1973-07-26 | 1974-07-24 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00382800A US3820770A (en) | 1973-07-26 | 1973-07-26 | Sub hearth construction for metallurgical furnaces |
Publications (1)
Publication Number | Publication Date |
---|---|
US3820770A true US3820770A (en) | 1974-06-28 |
Family
ID=23510458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00382800A Expired - Lifetime US3820770A (en) | 1973-07-26 | 1973-07-26 | Sub hearth construction for metallurgical furnaces |
Country Status (8)
Country | Link |
---|---|
US (1) | US3820770A (de) |
JP (1) | JPS5050204A (de) |
AU (1) | AU6952674A (de) |
BE (1) | BE818002A (de) |
DE (1) | DE2432992A1 (de) |
FR (1) | FR2238762B3 (de) |
GB (1) | GB1427646A (de) |
IT (1) | IT1014406B (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3858861A (en) * | 1974-01-17 | 1975-01-07 | United States Steel Corp | Underhearth cooling system |
US4325538A (en) * | 1979-12-27 | 1982-04-20 | Biuro Projektow Przemyslu Metali Niezelaznych "Bipromet" | Smelting furnace for direct obtaining of copper from ore concentrates/and copper ores |
US4377277A (en) * | 1979-08-03 | 1983-03-22 | Nippon Steel Corporation | Blast furnace having a cooling device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4157815A (en) * | 1978-04-28 | 1979-06-12 | Inland Steel Company | Furnace bottom construction with seal |
-
1973
- 1973-07-26 US US00382800A patent/US3820770A/en not_active Expired - Lifetime
-
1974
- 1974-05-29 AU AU69526/74A patent/AU6952674A/en not_active Expired
- 1974-06-17 JP JP49068253A patent/JPS5050204A/ja active Pending
- 1974-06-27 IT IT69040/74A patent/IT1014406B/it active
- 1974-07-09 DE DE2432992A patent/DE2432992A1/de active Pending
- 1974-07-18 GB GB3192974A patent/GB1427646A/en not_active Expired
- 1974-07-23 BE BE146863A patent/BE818002A/xx unknown
- 1974-07-24 FR FR7425719A patent/FR2238762B3/fr not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3858861A (en) * | 1974-01-17 | 1975-01-07 | United States Steel Corp | Underhearth cooling system |
US4377277A (en) * | 1979-08-03 | 1983-03-22 | Nippon Steel Corporation | Blast furnace having a cooling device |
US4325538A (en) * | 1979-12-27 | 1982-04-20 | Biuro Projektow Przemyslu Metali Niezelaznych "Bipromet" | Smelting furnace for direct obtaining of copper from ore concentrates/and copper ores |
Also Published As
Publication number | Publication date |
---|---|
FR2238762A1 (de) | 1975-02-21 |
BE818002A (fr) | 1975-01-23 |
JPS5050204A (de) | 1975-05-06 |
IT1014406B (it) | 1977-04-20 |
AU6952674A (en) | 1975-12-04 |
FR2238762B3 (de) | 1977-05-20 |
DE2432992A1 (de) | 1975-02-13 |
GB1427646A (en) | 1976-03-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: USX CORPORATION, A CORP. OF DE, STATELESS Free format text: MERGER;ASSIGNOR:UNITED STATES STEEL CORPORATION (MERGED INTO);REEL/FRAME:005060/0960 Effective date: 19880112 |