GB1144070A - Hearth furnace - Google Patents
Hearth furnaceInfo
- Publication number
- GB1144070A GB1144070A GB32174/66A GB3217466A GB1144070A GB 1144070 A GB1144070 A GB 1144070A GB 32174/66 A GB32174/66 A GB 32174/66A GB 3217466 A GB3217466 A GB 3217466A GB 1144070 A GB1144070 A GB 1144070A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wustite
- surface layer
- inch
- layer
- hearth
- 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
Links
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 4
- 239000002344 surface layer Substances 0.000 abstract 4
- 239000010410 layer Substances 0.000 abstract 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 239000000395 magnesium oxide Substances 0.000 abstract 2
- 238000003801 milling Methods 0.000 abstract 2
- 239000000377 silicon dioxide Substances 0.000 abstract 2
- 239000004927 clay Substances 0.000 abstract 1
- 239000003245 coal Substances 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000000470 constituent Substances 0.000 abstract 1
- 239000010459 dolomite Substances 0.000 abstract 1
- 229910000514 dolomite Inorganic materials 0.000 abstract 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
- C21B13/105—Rotary hearth-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/08—Making spongy iron or liquid steel, by direct processes in rotary furnaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Manufacture Of Iron (AREA)
Abstract
1,144,070. Rotary hearths. MIDLANDROSS CORP. 18 July, 1966 [19 July, 1965], No. 32174/66. Heading F4B. An annular rotary hearth furnace for heattreating materials containing iron oxide is formed with a two-inch surface layer containing wustite as a major constituent. Below the wustite surface layer the hearth comprising a two-inch layer of 95% magnesium oxide castable refractory, a four-inch layer of hard clay castable refractory, and a six-inch layer of insulating castable fireclay refractory. The surface layer is formed by supplying a pelletized magnetite concentrate with 4% of silica and 5% of coal on to the hearth and reacting this as it rotates in a reducing furnace atmosphere. Vitrified wustite is formed at temperatures between 2100‹ and 2500‹ F. Excess wustite formation during operation of the furnace, may be milled off by a milling screw, particularly if the surface layer is heated prior to milling. The addition of silica, reduces the temperature of formation of vitrified wustite, whilst a dolomite or magnesia addition increases it.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47294865A | 1965-07-19 | 1965-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1144070A true GB1144070A (en) | 1969-03-05 |
Family
ID=23877546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32174/66A Expired GB1144070A (en) | 1965-07-19 | 1966-07-18 | Hearth furnace |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5227084B1 (en) |
| BE (1) | BE684180A (en) |
| DE (1) | DE1508052A1 (en) |
| GB (1) | GB1144070A (en) |
| NL (1) | NL6609484A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3617205A1 (en) * | 1985-05-23 | 1987-02-05 | Int Metals Reclamation Co | TURNOVER |
| DE19529925A1 (en) * | 1995-08-01 | 1997-02-06 | Mannesmann Ag | Method and device for entering bulk material in a rotary hearth furnace |
| WO1998046953A1 (en) * | 1997-04-11 | 1998-10-22 | Paul Wurth S.A. | Device for charging a rotary furnace |
| EP0961094A1 (en) * | 1998-04-29 | 1999-12-01 | Demag Italimpianti S.P.A. | Feeding and distributing device for rotary platforms, particularly for rotary-hearth furnaces |
| WO2000029628A1 (en) * | 1998-11-12 | 2000-05-25 | Midrex International B.V. Zürich Branch | Iron production method of operation in a rotary hearth furnace and improved furnace apparatus |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4701214A (en) * | 1986-04-30 | 1987-10-20 | Midrex International B.V. Rotterdam | Method of producing iron using rotary hearth and apparatus |
| JP7255272B2 (en) * | 2019-03-25 | 2023-04-11 | 住友金属鉱山株式会社 | Nickel oxide ore smelting method, reduction furnace |
-
1966
- 1966-07-06 NL NL6609484A patent/NL6609484A/xx unknown
- 1966-07-08 DE DE19661508052 patent/DE1508052A1/en active Pending
- 1966-07-15 BE BE684180D patent/BE684180A/xx unknown
- 1966-07-18 GB GB32174/66A patent/GB1144070A/en not_active Expired
- 1966-07-19 JP JP41046923A patent/JPS5227084B1/ja active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3617205A1 (en) * | 1985-05-23 | 1987-02-05 | Int Metals Reclamation Co | TURNOVER |
| DE19529925A1 (en) * | 1995-08-01 | 1997-02-06 | Mannesmann Ag | Method and device for entering bulk material in a rotary hearth furnace |
| WO1998046953A1 (en) * | 1997-04-11 | 1998-10-22 | Paul Wurth S.A. | Device for charging a rotary furnace |
| EP0961094A1 (en) * | 1998-04-29 | 1999-12-01 | Demag Italimpianti S.P.A. | Feeding and distributing device for rotary platforms, particularly for rotary-hearth furnaces |
| US6164891A (en) * | 1998-04-29 | 2000-12-26 | Demag Italimpianti S.P.A. | Feeding and distributing device for rotary platforms, particularly for rotary-hearth furnaces |
| WO2000029628A1 (en) * | 1998-11-12 | 2000-05-25 | Midrex International B.V. Zürich Branch | Iron production method of operation in a rotary hearth furnace and improved furnace apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| BE684180A (en) | 1967-01-16 |
| DE1508052A1 (en) | 1969-04-03 |
| JPS5227084B1 (en) | 1977-07-18 |
| NL6609484A (en) | 1967-01-20 |
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