EP0062986B1 - Lanze zum Ausbessern von Frischgefässen - Google Patents

Lanze zum Ausbessern von Frischgefässen Download PDF

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Publication number
EP0062986B1
EP0062986B1 EP19820301527 EP82301527A EP0062986B1 EP 0062986 B1 EP0062986 B1 EP 0062986B1 EP 19820301527 EP19820301527 EP 19820301527 EP 82301527 A EP82301527 A EP 82301527A EP 0062986 B1 EP0062986 B1 EP 0062986B1
Authority
EP
European Patent Office
Prior art keywords
lance
nozzles
repairing
nozzle
cylindrical surface
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
Application number
EP19820301527
Other languages
English (en)
French (fr)
Other versions
EP0062986A1 (de
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/de
Application granted granted Critical
Publication of EP0062986B1 publication Critical patent/EP0062986B1/de
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 the refractory linings of refining vessels such as converters for steel making and more particularly, but not exclusively, it is concerned with a lance for spraying melted or sintering or semisolid refractory material against the walls of vessels such as steel making converters and for removing accumulated adhering substances from the bottoms of furnaces.
  • a method of repairing partially damaged portions of the refractory lining of refining vessels such as steel making converters is disclosed in United States patent No. 3,883,078.
  • pulverized refractory repairing material pulverized solid fuel and oxygen are sprayed through a nozzle at the front end of a lance against the surface of the furnace wall of the refining vessel at a high temperature, for example, 1,350-1,500°C, immediately after delivery or removal of the molten steel from the furnace so that the damaged or consumed portion of the refractory lining is coated with the melted or semisolid refractory repairing material produced from the pulverized refractory repairing material by fuel combustion whereby the refractory repairing material becomes joined to the lining refractory.
  • the equipment used, in this gunning method is shown in Figure 1 of the accompanying drawings.
  • the equipment includes a spray lance having one end rotatably supported on a movable trolley 3.
  • the other end 1 is curved and has affixed thereto a nozzle 2 extending in a radial direction with respect to the lance axis.
  • the lance is required to have the curved end 1.
  • Such a conventional spray lance is suitable only for repairing a lining partially or locally and requires much time if it is used for repairing a wider area.
  • a lance for repairing the wall of a refining vessel by flame gunning said lance including (a) multiple concentric tubes forming a passage for repairing material to be sprayed and a passage for a combustion supporting gas and (b) at least one nozzle provided on the cylindrical surface of the lance and consisting of two concentric pipes communicating with said passages respectively characterised in that said nozzle is forwardly inclined at an angle to the longitudinal axis of the lance.
  • the lance includes a plurality of nozzles extending in various directions.
  • the nozzles may, for example, be provided along a generator of the cylindrical surface or in pairs at diametrically opposed positions.
  • the nozzles are selectively closable by means of plugs so as to be able to freely adjust the delivery amount, range and direction of the repairing material and the gas to effectively repair refractory walls in the most preferable condition.
  • the front end of the lance is such that combustion supporting gas only is emitted for the purpose of removing adherent substances accumulated on the bottom of the furnace.
  • the lance 12 consists of four concentric tubes forming four passages 18, 19, 20 and 21.
  • the central flow passage 18 is for powdered refractory repairing material (e.g. MgO and carbon powder) together with a carrier gas (N 2 ), the annular flow passage 19 surrounding the central flow passage 18 is for a combustion supporting gas (e.g. a gas including more than 50% oxygen), and the two outer annular passages 20 and 21 which communicate with each other and surround the passages 18 and 19 are for feeding and returning cooling water.
  • the central passage 18 may be used for the combustion supporting gas, and the annular passage 19 may be used for the repairing material.
  • the lance 12 includes a plurality of nozzles 16. These are located on the outer cylindrical surface and the front end of the lance and each nozzle 16 communicates with the central passage 18 and the annular passage 19.
  • Each nozzle 16 consists of an inner nozzle pipe 16a communicating with the central passage 18 and an outer nozzle pipe 16b concentric with the inner nozzle pipe 16a and communicating with the annular passage 19.
  • the nozzles 16 on the cylindrical surface of the lance are inclined forwardly at an angle to the longitudinal axis 1 of the lance and the nozzle at the front end of the lance extends in the axial direction. The inclination of the nozzles on the cylindrical surface is advantageous from the point of view of the resistance to the flow of the powder.
  • the lance 12 may be provided, on its cylindrical surface, with only one nozzle 16 or a plurulity of nozzles 16 as the case may be. Such a plurality of nozzles 16 is preferably arranged along at least one generator of the cylindrical lance.
  • a lance having thus arranged nozzles is advantageous for repairing wider areas of a wall at a time and, when some of the nozzles have been plugged, can also be used for local or partial repairing of the wall.
  • the use of plugs for some of the nozzles allows control of the direction of spraying and of the amount of combustion supporting gas and repairing material sprayed. In this way repairs can be effected appropriate to the position and the degree of damage without any superfluous effort.
  • Fig. 3 illustrates a further embodiment of the invention, wherein the lance 12 includes a furnace bottom cleaning device for removing adhesive substances from the furnace bottom. These adhesive substances decrease the volume of the furnace and arise as a consequence of insufficient slag removal in, for example an upper blow 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.
  • the front end of the passage 18 for the repairing material is closed at 24 to form a cleaning opening 23 extending in the axial direction of the lance and communicating with the annular passage 19 for the combustion supporting gas.
  • the cleaning opening 23 is in opposition in the furnace bottom, so that a part of the combustion supporting gas which is introduced contacts the high temperature adhesive substances on the furnace bottom and causes the same to melt so as to ensure the cleaning of the bottom.
  • the cleaning opening 23 is arranged at a location corresponding to the central passage 18.
  • the lance according to the invention can effectively perform controlled repairs to the 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 when hot repairing a refining furnace in that not only is it capable of repairing wider areas of the furnace wall at a time but also it is simultaneously capable of cleaning the 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)

Claims (7)

1. Eine Lanze zum Ausbessern der Wandung eines Frischgefäßes durch Flammenschießen, wobei besagte Lanze (a) eine Vielzahl konzentrischer Rohre, die eine Passage für das Ausbesserungsmaterial, das eingesprüht werden soll, und eine Passage für ein verbrennungspeisendes Gas bilden, und (b) zumindest eine Düse, die an der zylindrischen Oberfläche der Lanze vorgesehen ist und aus zwei konzentrischen Kanälen besteht, die mit,besagten Passagen kommunizieren, aufweist, dadurch gekennzeichnet, daß besagte Düse in einem Winkel zur Längsachse der Lanze nach vor geneigt ist.
2. Eine Lanze gemäß Anspruch 1, bei der eine Mehrzahl von besagten Düsen entlang einer Erzeugenden der zylindrischen Oberfläche der Lanze vorgesehen ist.
3. Eine Lanze gemäß dem Anspruch 1 oder 2, bei der eine Mehrzahl von besagten Düsen vorgesehen ist, wobei Paare von besagten Düsen an der zylindrischen Oberfläche der Lanze an genau entgegengesetzt liegenden Positionen vorgesehen sind.
4. Eine Lanze gemäß einem der vorhergehenden Ansprüche und eine Mehrzahl von Düsen aufweisend, bei der ein Stöpsel in zumindest eine Düse eingepaßt ist, um sie so zu verschließen.
5. Eine Lanze gemäß einem der vorhergehenden Ansprüche, bei der vier von besagten konzentrischen Rohren vorhanden sind, wobei die zwei inneren Rohre für das Ausbesserungsmaterial und das Gas und zwei äußere Rohre für das Anspeisen und Zurückführen eines kühlenden Mediums bestimmt sind.
6. Eine Lanze gemäß einem der Ansprüche 1 bis 5, bei der zusätzlich eine Düse am Frontende der Lanze vorgesehen ist.
7. Eine Lanze gemäß einem der Ansprüche 1 bis 5, bei der das Frontende der Lanze derartig ist, um ein Austreten von besagtem Gas, in einer axialen Richtung, nur ohne besagtes Ausbesserungsmaterial zu erlauben.
EP19820301527 1981-04-06 1982-03-24 Lanze zum Ausbessern von Frischgefässen Expired EP0062986B1 (de)

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
JP51392/81 1981-04-06
JP51391/81 1981-04-06
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

Publications (2)

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

Family

ID=26391927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820301527 Expired EP0062986B1 (de) 1981-04-06 1982-03-24 Lanze zum Ausbessern von Frischgefässen

Country Status (3)

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

Cited By (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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE61415T1 (de) * 1986-07-04 1991-03-15 Vgini I P Rabot Ogneupornoj Duese zum heissreperaturspritzen bei metallurgischen anlagen.
GB2269223B (en) * 1992-07-31 1996-03-06 Fosbel Int Ltd Surface treatment of refractories
GB9707369D0 (en) 1997-04-11 1997-05-28 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
FR3120937B1 (fr) * 2021-03-17 2023-04-28 Irf Europa S R L Procédé de réparation d’une sole d’un four par injection
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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365523A (en) * 1964-12-09 1968-01-23 Union Carbide Corp Method of removing encrusted slag from furnaces
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
SU914636A1 (ru) * 1979-04-16 1982-03-23 Do Nii Chernoj Metallurgii Способ факельного торкретирования футеровки металлургических агрегатов 1 2
GB2064992B (en) * 1979-05-30 1983-03-09 Do Nii Chernoj Metallurgii Flame guniting lance
AU514740B2 (en) * 1979-09-21 1981-02-26 Donetsky Nauchno-Issledovatelsky Institut Chernoi Metallurgii Hot patching of upright converter lining

Cited By (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

Also Published As

Publication number Publication date
DE3266479D1 (en) 1985-10-31
EP0062986A1 (de) 1982-10-20
CA1179119A (en) 1984-12-11

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