EP0501045A1 - Iron runner - Google Patents
Iron runner Download PDFInfo
- Publication number
- EP0501045A1 EP0501045A1 EP91200420A EP91200420A EP0501045A1 EP 0501045 A1 EP0501045 A1 EP 0501045A1 EP 91200420 A EP91200420 A EP 91200420A EP 91200420 A EP91200420 A EP 91200420A EP 0501045 A1 EP0501045 A1 EP 0501045A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lining
- iron
- wear
- runner
- thickening
- 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.)
- Withdrawn
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/14—Discharging devices, e.g. for slag
Definitions
- the invention relates to an iron runner for tapping molten crude iron from a blast furnace, comprising at least a wear lining which forms a boundary carrying the iron during operation and a permanent lining in which the wear lining is contained, a steel or concrete outer boundary and at least an outer lining with a high coefficient of thermal conductivity which lining is provided between the outer boundary and the permanent lining.
- Such an iron runner is known from the 'Iron & Steel Engineer' of October 1988, pages 47 - 51.
- a problem of this known iron runner is the substantial wear which occurs especially at the level of the iron/slag interface-layer, and which eventually necessitates repair of the wear lining carrying iron during operation. This is particularly a problem because this wear is quite substantial in the vicinity of the interface-layer due to the highly abrasive action of the slag, which when repairing makes it necessary to pull down a wear lining that is still intact for the greater part.
- the object of the invention is to make the wear of the wear lining proceed more evenly, which enables the service life of the iron runner to be prolonged and the iron runner to be operated at lower operational costs.
- the iron runner in accordance with the invention is characterised in that the outer lining is provided with a thickening in the direction of the wear lining, which thickening is applied at the level of the interface-layer being present during operation between the iron being carried through the runner and a slag layer floating on the iron.
- Fig. 1 shows a cross-section of the iron runner in accordance with the invention.
- Fig. 1 the iron runner (1) is shown of which the boundary carrying the iron is formed by a wear lining (2).
- the wear lining (2) which may consist of a number of layers able to move relative to each other, different kinds of material may be used, but it is normal to use a refractory concrete for this.
- a carbon intermediate lining (3) may be used as a permanent lining for temperature equalisation of the wear lining (2).
- this intermediate lining (3) is not essential to the invention.
- an insulating layer (4) Adjoining this intermediate lining (3) and in the absence thereof, adjoining the wear lining (2), an insulating layer (4) is provided which consists of a refractory concrete.
- the outer lining (6, 7) consists of a bottom plate (6) and side walls (7) which are thermally interconnected.
- carbon, graphite or semi-graphite, but preferably graphite for the outer lining (6, 7) the required thermal conductivity is obtained in this place and it is possible to apply insulating refractory lining layers (8, 9) directly adjoining the side walls (7).
- the thermally high-conducting side walls (7) of the iron runner (1) are now also provided with a thickening (10) in the direction of the wear lining (2), which thickening (10) is applied at the level of the interface-layer being present during operation between the iron (11) being carried and the slag layer (12) floating on it.
- the thickening (10) adjoins directly the wear lining (2).
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
An iron runner for tapping molten crude iron from a blast furnace is proposed, comprising at least a wear lining which forms a boundary carrying the iron during operation and a permanent lining in which the wear lining is contained, an outer boundary and at least an outer lining with a high coefficient of thermal conductivity which is provided between the outer boundary and the permanent lining, wherein the outer lining is provided with a thickening in the direction of the wear lining, which thickening is applied at the level of the interface-layer being present during operation between the iron being carried through the runner and a slag layer floating on the iron.
Description
- The invention relates to an iron runner for tapping molten crude iron from a blast furnace, comprising at least a wear lining which forms a boundary carrying the iron during operation and a permanent lining in which the wear lining is contained, a steel or concrete outer boundary and at least an outer lining with a high coefficient of thermal conductivity which lining is provided between the outer boundary and the permanent lining.
- Such an iron runner is known from the 'Iron & Steel Engineer' of October 1988, pages 47 - 51. A problem of this known iron runner is the substantial wear which occurs especially at the level of the iron/slag interface-layer, and which eventually necessitates repair of the wear lining carrying iron during operation. This is particularly a problem because this wear is quite substantial in the vicinity of the interface-layer due to the highly abrasive action of the slag, which when repairing makes it necessary to pull down a wear lining that is still intact for the greater part.
- The object of the invention is to make the wear of the wear lining proceed more evenly, which enables the service life of the iron runner to be prolonged and the iron runner to be operated at lower operational costs.
- To that end the iron runner in accordance with the invention is characterised in that the outer lining is provided with a thickening in the direction of the wear lining, which thickening is applied at the level of the interface-layer being present during operation between the iron being carried through the runner and a slag layer floating on the iron.
- Surprisingly it has been found that the better cooling of the wear lining obtained by this, at the level of the iron/slag interface-layer being present during operation, counteracts the wear of the wear lining there. This effect is highly enhanced by the embodiment of the iron runner in which the thickening of the outer lining adjoins directly the permanent lining.
- In the following the invention will be illustrated by reference to the drawing of a non-limitative example of embodiment of the iron runner in accordance with the invention.
- Fig. 1 shows a cross-section of the iron runner in accordance with the invention.
- In Fig. 1 the iron runner (1) is shown of which the boundary carrying the iron is formed by a wear lining (2). For the wear lining (2), which may consist of a number of layers able to move relative to each other, different kinds of material may be used, but it is normal to use a refractory concrete for this. Directly adjoining the wear lining (2) a carbon intermediate lining (3) may be used as a permanent lining for temperature equalisation of the wear lining (2). However, this intermediate lining (3) is not essential to the invention. Adjoining this intermediate lining (3) and in the absence thereof, adjoining the wear lining (2), an insulating layer (4) is provided which consists of a refractory concrete. The outer lining (6, 7) consists of a bottom plate (6) and side walls (7) which are thermally interconnected.
By using carbon, graphite or semi-graphite, but preferably graphite for the outer lining (6, 7) the required thermal conductivity is obtained in this place and it is possible to apply insulating refractory lining layers (8, 9) directly adjoining the side walls (7). - In accordance with the invention the thermally high-conducting side walls (7) of the iron runner (1) are now also provided with a thickening (10) in the direction of the wear lining (2), which thickening (10) is applied at the level of the interface-layer being present during operation between the iron (11) being carried and the slag layer (12) floating on it. Preferably the thickening (10) adjoins directly the wear lining (2). By this an especially effective local cooling of the wear lining (2) is obtained at the level of the iron/slag interface-layer, by which the wear of the wear lining (2) at the level of said interface-layer is counteracted and a longer service life of the wear lining is achieved.
Claims (2)
- Iron runner for tapping molten crude iron from a blast furnace, comprising at least a wear lining which forms a boundary carrying the iron during operation and a permanent lining in which the wear lining is contained, an outer boundary and at least an outer lining with a high coefficient of thermal conductivity which lining is provided between the outer boundary and the permanent lining, characterised in that the outer lining is provided with a thickening in the direction of the wear lining, which thickening is applied at the level of the interface-layer being present during operation between the iron being carried through the runner and a slag layer floating on the iron.
- Iron runner in accordance with claim 1, characterised in that the thickening of the outer lining adjoins directly the wear lining.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP91200420A EP0501045A1 (en) | 1991-02-27 | 1991-02-27 | Iron runner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP91200420A EP0501045A1 (en) | 1991-02-27 | 1991-02-27 | Iron runner |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0501045A1 true EP0501045A1 (en) | 1992-09-02 |
Family
ID=8207530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91200420A Withdrawn EP0501045A1 (en) | 1991-02-27 | 1991-02-27 | Iron runner |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0501045A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0090761A1 (en) * | 1982-03-26 | 1983-10-05 | Arbed S.A. | Spout for molten metal |
EP0143971A1 (en) * | 1983-10-28 | 1985-06-12 | Betriebsforschungsinstitut VDEh Institut für angewandte Forschung GmbH | Runner for a shaft furnace |
EP0375007A1 (en) * | 1988-12-19 | 1990-06-27 | Hoogovens Groep B.V. | Handling molten materials |
-
1991
- 1991-02-27 EP EP91200420A patent/EP0501045A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0090761A1 (en) * | 1982-03-26 | 1983-10-05 | Arbed S.A. | Spout for molten metal |
EP0143971A1 (en) * | 1983-10-28 | 1985-06-12 | Betriebsforschungsinstitut VDEh Institut für angewandte Forschung GmbH | Runner for a shaft furnace |
EP0375007A1 (en) * | 1988-12-19 | 1990-06-27 | Hoogovens Groep B.V. | Handling molten materials |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4453253A (en) | Electric arc furnace component | |
CN1023568C (en) | Guide groove for conveying molten iron and cooling method thereof | |
UA55443C2 (en) | A refractory wall, a metallic vessel containing the refractory wall, and a process using such refractory wall | |
US5088695A (en) | Iron runner | |
EP0922115B1 (en) | Runner for a hot melt, runner system and method for conveying a hot melt | |
MY141390A (en) | Refractory wall structure | |
EP0501045A1 (en) | Iron runner | |
EP0076577A1 (en) | Molten metal transfer channels | |
CA2037648A1 (en) | Iron runner | |
EP0434421A3 (en) | Protective layer for linings in metallurgical furnaces and the like | |
Van Larr et al. | Blast furnace refractories and cooling systems-the Hoogovens solution | |
NL8903009A (en) | Gulley for tapping molten iron from blast furnace - has wear lining with heat conductive backing layer extended to withdraw heat at the molten metal-slag interface height in the wear layer | |
Van Laar | Iron Runner | |
US4418893A (en) | Water-cooled refractory lined furnaces | |
US3399267A (en) | Induction furnace | |
US3810610A (en) | Bosh construction for metallurgical furnaces | |
Griffiths | Technical and Economic Advantages of Long-Campaign Cold-Blast Cupolas | |
US2085925A (en) | Tuyere | |
forms SiC | Development of refractories for BF troughs | |
Mizoguchi et al. | IMPROVEMENT ACTIVITIES OF LIFE PROLONGATION AT NAKAYAMA NO. 2 BLAST FURNACE | |
JPH04319066A (en) | Vessel for receiving molten metal | |
Morimoto et al. | Upgrading relining of Mizushima no. 4 blast furnace for a longer Campaign | |
McLaughlin | Slab Shortage Frustrates Gulf States Sales | |
Elwell | DEVELOPMENT OF IMPROVED REFRACTORIES FOR SECONDARY STEEL REFINING AND TEEMING LADLES | |
McCombe | The Development of the Cupola. 1950's--Hot Blast: the Introduction of Water-Cooled Shells |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19910227 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE ES FR IT LU NL |
|
17Q | First examination report despatched |
Effective date: 19940630 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19950207 |