EP0062986A1 - Lance pour réparer des récipients d'affinage - Google Patents

Lance pour réparer des récipients d'affinage Download PDF

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Publication number
EP0062986A1
EP0062986A1 EP82301527A EP82301527A EP0062986A1 EP 0062986 A1 EP0062986 A1 EP 0062986A1 EP 82301527 A EP82301527 A EP 82301527A EP 82301527 A EP82301527 A EP 82301527A EP 0062986 A1 EP0062986 A1 EP 0062986A1
Authority
EP
European Patent Office
Prior art keywords
lance
repairing
set forth
passage
combustible gas
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
EP82301527A
Other languages
German (de)
English (en)
Other versions
EP0062986B1 (fr
Inventor
Teruo Hiramatsu
Teifi Tanaka
Eiichi Tanno
Tsuneo Nagamine
Tadashi Morimoto
Masaaki Tsukamoto
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.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
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
Priority claimed from JP5139181A external-priority patent/JPS6015872B2/ja
Priority claimed from JP5139281A external-priority patent/JPS5949515B2/ja
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to AT82301527T priority Critical patent/ATE15814T1/de
Publication of EP0062986A1 publication Critical patent/EP0062986A1/fr
Application granted granted Critical
Publication of EP0062986B1 publication Critical patent/EP0062986B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1636—Repairing linings by projecting or spraying refractory materials on the lining
    • F27D1/1642—Repairing linings by projecting or spraying refractory materials on the lining using a gunning apparatus
    • F27D1/1647—Repairing linings by projecting or spraying refractory materials on the lining using a gunning apparatus the projected materials being partly melted, e.g. by exothermic reactions of metals (Al, Si) with oxygen
    • F27D1/1652—Flame guniting; Use of a fuel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/44—Refractory linings
    • C21C5/441—Equipment used for making or repairing linings
    • C21C5/443—Hot fettling; Flame gunning
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1636—Repairing linings by projecting or spraying refractory materials on the lining
    • F27D1/1642—Repairing linings by projecting or spraying refractory materials on the lining using a gunning apparatus
    • F27D1/1647—Repairing linings by projecting or spraying refractory materials on the lining using a gunning apparatus the projected materials being partly melted, e.g. by exothermic reactions of metals (Al, Si) with oxygen
    • F27D1/1652—Flame guniting; Use of a fuel
    • F27D2001/1663—Fluid fuel, e.g. gas

Definitions

  • This invention relates to a spray lance for a flame gunning device for repairing partially damaged portions of refractory linings of refining vessels such as converters for steel making, and more particularly to a lance for spraying melted or sintering or semisolid refractory against walls of vessels such as steel making converters, while cleaning raised bottoms of furnaces with accumulated adhering substances.
  • a method of repairing partially damaged portions of refractory lining of refining vessels such as steel making converters has been known as a repairing method disclosed in United States Patent No. 3,883,078.
  • This repairing method is referred to as wet gunniting process wherein pulverized refractory, pulverized solid fuel and oxygen are sprayed through a nozzle at a front end of a lance against a furnace wall surface of a refining vessel at a high temperature, for example, 1,350-1,500°C immediately after delivery or removal of melt steel from the furnace so that the damaged or consumed portion of the refractory lining is coated with the melted or semisolid refractory produced from the pulverized refractory by fuel combustion to join the melted refractory with the lining refractory.
  • a high temperature for example, 1,350-1,500°C
  • the spray lance for use in the gunniting process has one end rotatably supported on a movable trolley 3 and the other curved end 1 to which is fixed a nozzle 2 directing in a radial direction of a lance tube axis (Fig. 1).
  • a nozzle 2 directing in a radial direction of a lance tube axis (Fig. 1).
  • a conventional spray lance serves only to repair a lining partially or locally and requires much time for repairing a wider area.
  • the lance 12 consists of four concentric tubes to form four passages 18, 19, 20 and 21, the central flow passage 18 for flowing therethrough a repairing material (MgO and carbon powder) together with a carrier gas (N 2 ), the annular flow passage 19 surrounding the central flow passage 18 for flowing an oxygen gas (including more than 50% oxygen), and two outer annular passages 20 and 21 communicating with each other and surrounding the passages 18 and 19 for flowing feeding and returning cooling water.
  • the central passage 18 may be used for the oxygen gas, and the annular passage 19 for the repairing material.
  • the lance 12 is provided in outer cylindrical surfaces and front end with a plurality of nozzles 16 respectively communicating with the central passage 18 and the annular passage 19.
  • the nozzle 16 consists of an inner nozzle pipe 16a to form a passage communicating with the central passage 18 and an outer nozzle pipe 16b concentric to the inner nozzle pipe 16a to form a passage communicating with the annular passage 19.
  • the nozzles 16 extend branched from the passages of the lance 12 away from an axis I thereof and the nozzle at the front end of the lance extends in the axial direction.
  • the nozzles on the cylindrical surfaces are inclined to the axis A of the lance in consideration of flow resistance of the powder flowing through the central passage 18.
  • Fig. 3 illustrates nozzles 16 radially outwardly extending from a lance 12.
  • the lance 12 may be provided with only one nozzle 16 or a plurality of nozzles 16 as the case may be. Such a plurality of nozzles 16 are preferably arranged along at least one generator of the cylindrical lance.
  • the lance with thus arranged nozzles is advantageous for repairing wider areas of a wall at a time, and is also applicable to local or partial repairing of the wall by plugging some of the nozzles as shown at 26 in Fig. 3.
  • the use of the plugs 26 controls the directions and amount of the oxygen and repairing materials and sprayed areas to effect the repairing dependent upon positions and degrees of the damaged portions without any superfluous effort.
  • Fig. 5 illustrates a further embodiment of the invention, wherein a lance 2 includes a furnace bottom cleaning structure for removing adhesives on a furnace bottom.
  • the adhesives would decrease a volume in a furnace and be resulting from insufficient slag removal as in an upper blown converter or the like requiring agitation gas to be blown into the converter through the furnace bottom.
  • a nozzle 16 is not provided at the front end of the lance and a front end of a passage 18 for the repairing material is closed at 24 to form a cleaning opening 23 which opens in an axial direction of the lance and communicates with the annular passage 19 for the oxygen gas.
  • the cleaning opening 23 when the lance is inserted into the converter, the cleaning opening 23 is in opposition to the furnace bottom, so that part of the introduced oxygen gas contacting the high temperature adhesives on the furnace bottom burns so as to melt the adhesives to ensure the cleaning of the bottom.
  • the cleaning opening 23 may be arranged at a location corresponding to the central passage 18.
  • FIG. 6 An embodiment shown in Fig. 6 is substantially the same as that shown in Fig. 5 with exception of nozzles radially outwardly extend.
  • the lance according to the invention can effectively perform aimed repairing of linings of furnaces to bring good results in life, cost and rate of operation of the furnaces.
  • the lance according to the invention has a remarkable advantage in hot repairing a refining furnace which is not only capable of repairing wider areas of a furnace wall at a time but also simultaneously cleaning a furnace bottom.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP19820301527 1981-04-06 1982-03-24 Lance pour réparer des récipients d'affinage Expired EP0062986B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82301527T ATE15814T1 (de) 1981-04-06 1982-03-24 Lanze zum ausbessern von frischgefaessen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP5139181A JPS6015872B2 (ja) 1981-04-06 1981-04-06 フレ−ムガンニング装置の溶射ランス
JP5139281A JPS5949515B2 (ja) 1981-04-06 1981-04-06 精錬容器壁補修用ランス
JP51392/81 1981-04-06
JP51391/81 1981-04-06

Publications (2)

Publication Number Publication Date
EP0062986A1 true EP0062986A1 (fr) 1982-10-20
EP0062986B1 EP0062986B1 (fr) 1985-09-25

Family

ID=26391927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820301527 Expired EP0062986B1 (fr) 1981-04-06 1982-03-24 Lance pour réparer des récipients d'affinage

Country Status (3)

Country Link
EP (1) EP0062986B1 (fr)
CA (1) CA1179119A (fr)
DE (1) DE3266479D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277232A1 (fr) * 1986-07-04 1988-08-10 Vsesojuzny Gosudarstvenny Institut Nauchno-Issledovatelskikh I Proektnykh Rabot Ogneupornoi Promushlennosti Tuyere pour le gunitage au chalumeau d'installations metallurgiques
ES2088725A2 (es) * 1992-07-31 1996-08-16 Fosbel Int Ltd Procedimiento para limpiar la superficie de una estructura refractaria.
US6186410B1 (en) 1997-04-11 2001-02-13 Glaverbel Lance for heating or ceramic welding
JP2021000592A (ja) * 2019-06-20 2021-01-07 三浦工業株式会社 水分配器、水蒸発器、および水蒸発システム
CN114504938A (zh) * 2022-01-28 2022-05-17 大冶有色金属有限责任公司 一种用于连续精炼炉的喷枪保护方法
EP4060270A1 (fr) * 2021-03-17 2022-09-21 IRF Europa S.r.l. Procédé de réparation d'une sole d'un four par injection

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007054949B4 (de) * 2007-11-17 2016-09-29 Airbus Defence and Space GmbH Sprühpistole

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458945A1 (de) * 1965-03-25 1969-01-23 Union Carbide Corp Feuerfeste Auskleidung fuer OEfen und Verfahren zu ihrer Herstellung
DE1458948A1 (de) * 1964-12-09 1969-01-23 Union Carbide Corp Verfahren zum Entfernen von schwer schmelzbaren Schlacken-Verkrustungen
US3883078A (en) * 1972-01-28 1975-05-13 Oleg Nikolaevich Chemeris Method and a device for gunniting converter linings
WO1980002320A1 (fr) * 1979-04-16 1980-10-30 Do Nii Chernoj Metallurgii Methode de revetement par torche gunite d'installations metallurgiques
WO1980002739A1 (fr) * 1979-05-30 1980-12-11 Do Nii Chernoj Metallurgii Cuillere pour torche a gunite
AU514740B2 (en) * 1979-09-21 1981-02-26 Donetsky Nauchno-Issledovatelsky Institut Chernoi Metallurgii Hot patching of upright converter lining

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1458948A1 (de) * 1964-12-09 1969-01-23 Union Carbide Corp Verfahren zum Entfernen von schwer schmelzbaren Schlacken-Verkrustungen
DE1458945A1 (de) * 1965-03-25 1969-01-23 Union Carbide Corp Feuerfeste Auskleidung fuer OEfen und Verfahren zu ihrer Herstellung
US3883078A (en) * 1972-01-28 1975-05-13 Oleg Nikolaevich Chemeris Method and a device for gunniting converter linings
WO1980002320A1 (fr) * 1979-04-16 1980-10-30 Do Nii Chernoj Metallurgii Methode de revetement par torche gunite d'installations metallurgiques
WO1980002739A1 (fr) * 1979-05-30 1980-12-11 Do Nii Chernoj Metallurgii Cuillere pour torche a gunite
AU514740B2 (en) * 1979-09-21 1981-02-26 Donetsky Nauchno-Issledovatelsky Institut Chernoi Metallurgii Hot patching of upright converter lining

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
STAHL UND EISEN, Vol. 100, No. 3, 11 February 1980, Düsseldorf; H. SPERL: "Das Flammspritzverfahren zur Reparatur der Konverterzustellung in der Sowjetunion", pages 125 to 127 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277232A1 (fr) * 1986-07-04 1988-08-10 Vsesojuzny Gosudarstvenny Institut Nauchno-Issledovatelskikh I Proektnykh Rabot Ogneupornoi Promushlennosti Tuyere pour le gunitage au chalumeau d'installations metallurgiques
EP0277232A4 (fr) * 1986-07-04 1988-10-27 Vgini I P Rabot Ogneupornoj Tuyere pour le gunitage au chalumeau d'installations metallurgiques.
ES2088725A2 (es) * 1992-07-31 1996-08-16 Fosbel Int Ltd Procedimiento para limpiar la superficie de una estructura refractaria.
US6186410B1 (en) 1997-04-11 2001-02-13 Glaverbel Lance for heating or ceramic welding
JP2021000592A (ja) * 2019-06-20 2021-01-07 三浦工業株式会社 水分配器、水蒸発器、および水蒸発システム
EP4060270A1 (fr) * 2021-03-17 2022-09-21 IRF Europa S.r.l. Procédé de réparation d'une sole d'un four par injection
FR3120937A1 (fr) * 2021-03-17 2022-09-23 Irf Europa S.R.L. Procédé de réparation d’une sole d’un four par injection
CN114504938A (zh) * 2022-01-28 2022-05-17 大冶有色金属有限责任公司 一种用于连续精炼炉的喷枪保护方法
CN114504938B (zh) * 2022-01-28 2023-12-12 大冶有色金属有限责任公司 一种用于连续精炼炉的喷枪保护方法

Also Published As

Publication number Publication date
CA1179119A (fr) 1984-12-11
EP0062986B1 (fr) 1985-09-25
DE3266479D1 (en) 1985-10-31

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