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EP0501045A1 - Iron runner - Google Patents

Iron runner Download PDF

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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Withdrawn
Application number
EP91200420A
Other languages
German (de)
French (fr)
Inventor
Jacobus Van Laar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tata Steel Ijmuiden BV
Original Assignee
Hoogovens Groep BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoogovens Groep BV filed Critical Hoogovens Groep BV
Priority to EP91200420A priority Critical patent/EP0501045A1/en
Publication of EP0501045A1 publication Critical patent/EP0501045A1/en
Withdrawn legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/14Discharging 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).

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  • 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)

  1. 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.
  2. Iron runner in accordance with claim 1, characterised in that the thickening of the outer lining adjoins directly the wear lining.
EP91200420A 1991-02-27 1991-02-27 Iron runner Withdrawn EP0501045A1 (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19910227

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Effective date: 19940630

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18D Application deemed to be withdrawn

Effective date: 19950207