EP2486159A1 - Sinter cooler with adjustable cooling gas seal - Google Patents

Sinter cooler with adjustable cooling gas seal

Info

Publication number
EP2486159A1
EP2486159A1 EP10755100A EP10755100A EP2486159A1 EP 2486159 A1 EP2486159 A1 EP 2486159A1 EP 10755100 A EP10755100 A EP 10755100A EP 10755100 A EP10755100 A EP 10755100A EP 2486159 A1 EP2486159 A1 EP 2486159A1
Authority
EP
European Patent Office
Prior art keywords
sinter
cooling
sealing
cooler according
sealing elements
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.)
Granted
Application number
EP10755100A
Other languages
German (de)
French (fr)
Other versions
EP2486159B1 (en
Inventor
Alan Chambers
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.)
Outotec Finland Oy
Original Assignee
Outotec Oyj
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 Outotec Oyj filed Critical Outotec Oyj
Publication of EP2486159A1 publication Critical patent/EP2486159A1/en
Application granted granted Critical
Publication of EP2486159B1 publication Critical patent/EP2486159B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/26—Cooling of roasted, sintered, or agglomerated ores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/02—Sintering grates or tables
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/04—Sintering pots or sintering pans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals

Definitions

  • This invention relates to a sinter cooler for use in metallurgy, comprising a cooling-air chamber and a sinter cooling chamber including a perforated plate, which can travel over the same, and comprising a cooling gas seal between the upper surface of the cooling-air chamber and the lower surface of the sinter cooling chamber.
  • cooling gas seal as a stationary sealing support of the cooling-air chamber wall for sealing elements of elastomeric material carried along with the sinter cooling chamber includes a sealing strip with round, preferably circular cross-section.
  • Ring in the sense of the present invention should cover all rounded, i.e. both circular and oval sealing strips, but also profiles with a substantially rectangular cross- section, which in any case on their side facing the sealing elements of the traveling sinter cooling chamber are distinctly rounded or at least beveled to reduce the contact surface with the sealing elements.
  • sealing strip e.g. inexpensive commercially available metallic strand material can be used.
  • the sealing strip is arranged on the upper surface of a stationary sealing plate of the cooling-air chamber wall and in particular provided to be replaceable.
  • the part of the cooling gas seal carried along with the sinter cooling chamber includes sealing elements of a preferably heat-resistant elastomeric material, which are mounted with a vertical play such that they are seated on the sealing strip and slide along the sealing strip during the travel of the sinter cooling chamber.
  • Such seal is self-compensating, because in the case of the end-face wear of the sealing elements, the same automatically maintain their sealing function with respect to the sealing support by readjustment. In this way, the service life of the cooling gas seal is improved considerably.
  • the sealing elements are mounted in a vertically movable manner by means of a possibly weight-loaded holder and a guide pin.
  • the weight load can provide a sufficient contact pressure of the sealing elements on the sealing strip of the stationary cooling-air chamber wall, without impairing the slidability.
  • the guide pins can be received in possibly angular and releasable brackets of the sinter cooling chamber wall.
  • the respective, possibly two-part sealing element holder overlaps the associated sealing element e.g. in the manner of a framework, preferably in a roof-like manner with corresponding inclined surfaces, so that fine sinter dust easily can slip off downwards.
  • the end face of the sealing elements is formed with such a width that even in the case of lateral displacements of the traveling sinter cooling chamber they will always rest on the sealing strip.
  • the sealing elements preferably are made of a wear-resistant, creep-resistant polymer having good sliding properties, in particular of ultra-high molecular weight polyethylene, whereas in their upper region they are made of a polymer that bonds well to metal, in particular of ultra-high molecular weight polyethylene.
  • the two polymer components should also be easily connectable with each other, e.g. by bonding or by co-extrusion.
  • Fig. 1 shows a vertical section of a sinter cooler including the invention
  • Fig. 2 shows a slightly enlarged segment of such sinter cooler in a side view.
  • the embodiment of a sinter cooler including the invention as shown in the Figures is part of a sintering plant for use in metallurgy. It serves to cool the lumpy sintered ore to be supplied to a blast furnace by means of cooling air and to supply the recovered thermal energy of the hot waste air for example to another load.
  • the sinter cooler has a cooling-air chamber 1 and a sinter cooling chamber 3 for the hot sinter material accommodated therein, which for example by means of bogie wheels 9 can travel over the same on a rail track 17, 19 and includes a perforated or slotted plate 2 for the supply of cooling air.
  • a cooling gas seal 4 is provided between the upper surface of the cooling-air chamber 1 and the lower surface of the sinter cooling chamber 3.
  • the upper portion of the cooling-air chamber wall 7 is formed by stationary sealing plates 18 on whose upper surface a sealing strip 5 with round, preferably circular cross-section is arranged as a stationary sealing support.
  • the part of the cooling gas seal 4 carried along with the sinter cooling chamber 3 includes sealing elements 6 of an elastomeric material.
  • the sealing elements 6 are mounted with a vertical play such that they are seated on the upper surface of the sealing strip 5 substantially round in cross-section of the stationary vertical cooling-air chamber wall 7, and during travel of the sinter cooling chamber 3 slide along the sealing strip 5.
  • the sealing elements 6 are arranged behind a protective side wall 8 of the sinter cooling chamber 3 such that they are protected against sinter dust and heat.
  • the sealing elements 6 are mounted in a vertically movable manner by means of a possibly weight- loaded holder 12 and a guide pin 10, so that they can compensate a possible wear by automatic readjustment.
  • the upper head 21 of the guide pin 10 forms a stop when the sealing elements 6 have reached their maximum of admissible wear.
  • the guide pins 10 are received in angular, possibly releasable brackets 11 in a vertically movable manner, wherein the through holes through which the guide pins 10 are passed are large enough to provide for freely shifting the sealing elements 6 with respect to the sealing strip 5.
  • the holders 12 overlap the associated sealing element 6 in a roof-like manner by forming corresponding inclined surfaces, so that sinter dust obtained is easily discharged downwards.
  • the end face 16 of the respective sealing elements 6 is formed with such a width that it will always rest on the sealing strip 5, even in the case of a lateral displacement of the traveling sinter cooling chamber 3 by e.g. ⁇ 25 mm.
  • the end faces 16 have a width of about 4 to 12 cm.
  • the sealing elements 6 can be formed in their lower region of another wear-resistant, creep- resistant polymer having good sliding properties and in their upper region of a polymer that bonds well to metal.
  • the polymers expediently should be selected such that they can easily be connected with each other, e.g. by bonding or by co- extrusion. It is, however, less expensive to use only one single material for the sealing elements.
  • ultra-high molecular weight polyethylenes are used for manufacturing the sealing elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Furnace Details (AREA)
  • Powder Metallurgy (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)

Abstract

This invention relates to a sinter cooler of a sintering plant for use in metallurgy, comprising a cooling-air chamber (1 ) and a sinter cooling chamber (3) including a perforated plate (2) which can travel over the same, and comprising a cooling gas seal (4) between the upper surface of the cooling-air chamber (1 ) and the lower surface of the sinter cooling chamber (3), in which the cooling gas seal (4) as a stationary sealing support of the cooling-air chamber wall (17) for sealing elements (6) of an elastomeric material carried along with the sinter cooling chamber (3) includes a sealing strip (5) with substantially round, preferably circular cross-section.

Description

SINTER COOLER WITH ADJUSTABLE COOLING GAS SEAL
This invention relates to a sinter cooler for use in metallurgy, comprising a cooling-air chamber and a sinter cooling chamber including a perforated plate, which can travel over the same, and comprising a cooling gas seal between the upper surface of the cooling-air chamber and the lower surface of the sinter cooling chamber.
In such sinter coolers, external seals of cotton laminate (e.g. Laminex®), which are provided on the upper surface of rigid rubber strips, previously have been used to avoid cooling air losses. The rubber strips are arranged on adjustable angular brackets, which in turn are fixed on vertical stationary sealing plates. These seals wear relatively quickly and frequently must be readjusted by hand. It is the object of the present invention to equip a sinter cooler as mentioned above with a novel cooling gas seal, which with an improved durability safely reduces cooling air losses and hence the amount of required cooling air, without increasing the frictional resistance. This should lead to a saving of operating costs and improve the effectiveness of the cooler.
In a sinter cooler as mentioned above, this object in particular is solved in that the cooling gas seal as a stationary sealing support of the cooling-air chamber wall for sealing elements of elastomeric material carried along with the sinter cooling chamber includes a sealing strip with round, preferably circular cross-section.
"Round" in the sense of the present invention should cover all rounded, i.e. both circular and oval sealing strips, but also profiles with a substantially rectangular cross- section, which in any case on their side facing the sealing elements of the traveling sinter cooling chamber are distinctly rounded or at least beveled to reduce the contact surface with the sealing elements.
In such configuration of the cooling gas seal, dust deposits on the sealing surface are largely avoided and due to the "line contact" of the sealing elements of an elastomeric material with the stationary sealing support a high contact pressure and good tightness are achieved. As sealing strip, e.g. inexpensive commercially available metallic strand material can be used. Preferably, the sealing strip is arranged on the upper surface of a stationary sealing plate of the cooling-air chamber wall and in particular provided to be replaceable.
In a development of the invention, it is provided that the part of the cooling gas seal carried along with the sinter cooling chamber includes sealing elements of a preferably heat-resistant elastomeric material, which are mounted with a vertical play such that they are seated on the sealing strip and slide along the sealing strip during the travel of the sinter cooling chamber. Such seal is self-compensating, because in the case of the end-face wear of the sealing elements, the same automatically maintain their sealing function with respect to the sealing support by readjustment. In this way, the service life of the cooling gas seal is improved considerably.
To realize the self-adjusting sealing function, it is furthermore advantageous when the sealing elements are mounted in a vertically movable manner by means of a possibly weight-loaded holder and a guide pin. The weight load can provide a sufficient contact pressure of the sealing elements on the sealing strip of the stationary cooling-air chamber wall, without impairing the slidability.
For an easily replaceable assembly of the sealing elements, the guide pins can be received in possibly angular and releasable brackets of the sinter cooling chamber wall.
The respective, possibly two-part sealing element holder overlaps the associated sealing element e.g. in the manner of a framework, preferably in a roof-like manner with corresponding inclined surfaces, so that fine sinter dust easily can slip off downwards. In a development of the invention the end face of the sealing elements is formed with such a width that even in the case of lateral displacements of the traveling sinter cooling chamber they will always rest on the sealing strip. In their lower region, the sealing elements preferably are made of a wear-resistant, creep-resistant polymer having good sliding properties, in particular of ultra-high molecular weight polyethylene, whereas in their upper region they are made of a polymer that bonds well to metal, in particular of ultra-high molecular weight polyethylene. The two polymer components should also be easily connectable with each other, e.g. by bonding or by co-extrusion.
Further developments, advantages and possible applications of the invention can be taken from the following description of an embodiment and the drawing. All features described and/or illustrated form the subject-matter of the invention per se or in any combination, also independent of their inclusion in individual claims and/or their back- reference.
In the drawing:
Fig. 1 shows a vertical section of a sinter cooler including the invention, and
Fig. 2 shows a slightly enlarged segment of such sinter cooler in a side view. The embodiment of a sinter cooler including the invention as shown in the Figures is part of a sintering plant for use in metallurgy. It serves to cool the lumpy sintered ore to be supplied to a blast furnace by means of cooling air and to supply the recovered thermal energy of the hot waste air for example to another load. The sinter cooler has a cooling-air chamber 1 and a sinter cooling chamber 3 for the hot sinter material accommodated therein, which for example by means of bogie wheels 9 can travel over the same on a rail track 17, 19 and includes a perforated or slotted plate 2 for the supply of cooling air. To minimize a loss of cooling air, a cooling gas seal 4 is provided between the upper surface of the cooling-air chamber 1 and the lower surface of the sinter cooling chamber 3. The upper portion of the cooling-air chamber wall 7 is formed by stationary sealing plates 18 on whose upper surface a sealing strip 5 with round, preferably circular cross-section is arranged as a stationary sealing support. The part of the cooling gas seal 4 carried along with the sinter cooling chamber 3 includes sealing elements 6 of an elastomeric material. The sealing elements 6 are mounted with a vertical play such that they are seated on the upper surface of the sealing strip 5 substantially round in cross-section of the stationary vertical cooling-air chamber wall 7, and during travel of the sinter cooling chamber 3 slide along the sealing strip 5.
The sealing elements 6 are arranged behind a protective side wall 8 of the sinter cooling chamber 3 such that they are protected against sinter dust and heat. The sealing elements 6 are mounted in a vertically movable manner by means of a possibly weight- loaded holder 12 and a guide pin 10, so that they can compensate a possible wear by automatic readjustment. The upper head 21 of the guide pin 10 forms a stop when the sealing elements 6 have reached their maximum of admissible wear. In the illustrated embodiment, the guide pins 10 are received in angular, possibly releasable brackets 11 in a vertically movable manner, wherein the through holes through which the guide pins 10 are passed are large enough to provide for freely shifting the sealing elements 6 with respect to the sealing strip 5. The holders 12 overlap the associated sealing element 6 in a roof-like manner by forming corresponding inclined surfaces, so that sinter dust obtained is easily discharged downwards.
The end face 16 of the respective sealing elements 6 is formed with such a width that it will always rest on the sealing strip 5, even in the case of a lateral displacement of the traveling sinter cooling chamber 3 by e.g. ± 25 mm. Preferably, the end faces 16 have a width of about 4 to 12 cm.
For further improvement of a permanent operability of the cooling gas seal 4, the sealing elements 6 can be formed in their lower region of another wear-resistant, creep- resistant polymer having good sliding properties and in their upper region of a polymer that bonds well to metal. Furthermore, the polymers expediently should be selected such that they can easily be connected with each other, e.g. by bonding or by co- extrusion. It is, however, less expensive to use only one single material for the sealing elements. Preferably, ultra-high molecular weight polyethylenes are used for manufacturing the sealing elements.
List of Reference Numerals:
1 cooling-air chamber
2 perforated plate
3 sinter cooling chamber
4 cooling gas seal
5 sealing strip
6 sealing elements
7 cooling-air chamber wall
8 protective side wall
9 bogie wheels
10 guide pins
1 1 bracket
12 holder
14 sinter cooling chamber wall
16 end face
17 rail base
18 stationary sealing plates
19 rails for sinter cooling chamber
20 stationary sealing elements
21 head

Claims

Claims:
1. A sinter cooler of a sintering plant for use in metallurgy, comprising a cooling-air chamber (1 ) and a sinter cooling chamber (3) including a perforated plate (2), which can travel over the same, and comprising a cooling gas seal (4) between the upper surface of the cooling-air chamber (1 ) and the lower surface of the sinter cooling chamber (3), characterized in that the cooling gas seal (4) as stationary sealing support of the cooling-air chamber wall (7) for sealing elements (6) of an elastomeric material carried along with the sinter cooling chamber (3) includes a sealing strip (5) with substantially round, preferably circular cross-section.
2. The sinter cooler according to claim 1 , characterized in that the sealing strip (5) is arranged on the upper surface of a stationary sealing plate (18) of the cooling-air chamber wall (7).
3. The sinter cooler according to claim 1 or 2, characterized in that the part of the cooling gas seal (4) carried along with the sinter cooling chamber (3) includes sealing elements (6) of an elastomeric material, which are mounted with a vertical play such that they are seated on the sealing strip (5) and during travel of the sinter cooling chamber (3) slide along the sealing strip (5) .
4. The sinter cooler according to any of the preceding claims, characterized in that the sealing elements (6) are mounted in a vertically movable manner by means of a possibly weight-loaded holder (12) and a guide pin (10).
5. The sinter cooler according to any of the preceding claims, characterized in that the guide pins (10) are received in possibly angular brackets (11 ) on the sinter cooling chamber wall (14).
6. The sinter cooler according to any of the preceding claims, characterized in that the respective sealing element holder (12) overlaps the associated sealing element (6) in a roof-like manner with corresponding inclined surfaces.
7. The sinter cooler according to any of the preceding claims, characterized in that the end face (16) of the sealing elements (6) is formed with such a width that they will always rest on the sealing strip (5) even in the case of lateral displacements of the traveling sinter cooling chamber (3).
8. The sinter cooler according to any of the preceding claims, characterized in that in their lower region the sealing elements (6) are made of a wear-resistant, creep- resistant polymer having good sliding properties.
9. The sinter cooler according to any of the preceding claims, characterized in that in their upper region the sealing elements (6) are made of a polymer that bonds well to metal.
EP10755100.4A 2009-10-08 2010-09-08 Sinter cooler with adjustable cooling gas seal Not-in-force EP2486159B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910048722 DE102009048722A1 (en) 2009-10-08 2009-10-08 sinter cooler
PCT/EP2010/005520 WO2011042102A1 (en) 2009-10-08 2010-09-08 Sinter cooler with adjustable cooling gas seal

Publications (2)

Publication Number Publication Date
EP2486159A1 true EP2486159A1 (en) 2012-08-15
EP2486159B1 EP2486159B1 (en) 2016-01-27

Family

ID=43304152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10755100.4A Not-in-force EP2486159B1 (en) 2009-10-08 2010-09-08 Sinter cooler with adjustable cooling gas seal

Country Status (9)

Country Link
EP (1) EP2486159B1 (en)
AU (1) AU2010305133B2 (en)
BR (1) BR112012007982A2 (en)
DE (1) DE102009048722A1 (en)
EA (1) EA020678B1 (en)
ES (1) ES2568646T3 (en)
UA (1) UA103112C2 (en)
WO (1) WO2011042102A1 (en)
ZA (1) ZA201202057B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102865743B (en) * 2012-10-23 2014-06-04 中冶长天国际工程有限责任公司 Sealing device and method used between ignition furnace in sintering device and trolley
CN106959016B (en) * 2016-01-08 2019-03-05 宝山钢铁股份有限公司 A kind of chute-type sealing device for upper portion of annular cooler trolley
CN106482528A (en) * 2016-11-11 2017-03-08 攀钢集团西昌钢钒有限公司 A kind of sealing device of sintering circular cooler
CN109612281B (en) * 2016-11-29 2020-07-07 安徽工业大学 Sintering cooling machine

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
DE2844227A1 (en) * 1978-10-11 1980-04-24 Metallgesellschaft Ag ROUND COOLER FOR HOT PIECE MATERIAL
DE3037222A1 (en) * 1980-10-02 1982-04-29 TKV Transportanlagen - Konstruktions- und Vertriebs-Gesellschaft mbH, 6380 Bad Homburg DEVICE FOR THE THERMAL TREATMENT OF PIECE OF GOODS IN CIRCULAR TROUGHS WITH GAS-PERMANENT FLOORS
JPS5877537A (en) * 1981-11-04 1983-05-10 Nagata Seisakusho:Kk Preventing method for escape of air from sintered ore cooler
JPS5913891A (en) * 1982-07-15 1984-01-24 三菱重工業株式会社 Sealing device for grate machine
US5148687A (en) * 1990-09-28 1992-09-22 Hitachi Zosen Corporation Cooling apparatus for bulk material
JP3146151B2 (en) * 1996-04-04 2001-03-12 中外炉工業株式会社 Strip furnace sealing device
KR100435484B1 (en) * 1999-12-28 2004-06-10 주식회사 포스코 Sliding seal apparatus of pallet
CN201032376Y (en) * 2007-04-05 2008-03-05 中冶长天国际工程有限责任公司 Trolley lower part sealing device for circular cooler

Non-Patent Citations (1)

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Title
See references of WO2011042102A1 *

Also Published As

Publication number Publication date
AU2010305133B2 (en) 2015-01-22
BR112012007982A2 (en) 2016-03-29
DE102009048722A1 (en) 2011-04-21
EP2486159B1 (en) 2016-01-27
UA103112C2 (en) 2013-09-10
AU2010305133A1 (en) 2012-04-26
EA020678B1 (en) 2014-12-30
WO2011042102A1 (en) 2011-04-14
EA201290180A1 (en) 2012-11-30
ZA201202057B (en) 2013-05-29
ES2568646T3 (en) 2016-05-03

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