EP0123758A1 - Procédé pour projeter des réfractaires - Google Patents

Procédé pour projeter des réfractaires Download PDF

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Publication number
EP0123758A1
EP0123758A1 EP83420078A EP83420078A EP0123758A1 EP 0123758 A1 EP0123758 A1 EP 0123758A1 EP 83420078 A EP83420078 A EP 83420078A EP 83420078 A EP83420078 A EP 83420078A EP 0123758 A1 EP0123758 A1 EP 0123758A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
gunning
working surface
refractory
refractories
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Withdrawn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
EP83420078A
Other languages
German (de)
English (en)
Inventor
Masaru Takashima
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.)
Aikoh Co Ltd
Original Assignee
Aikoh Co Ltd
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 Aikoh Co Ltd filed Critical Aikoh Co Ltd
Priority to EP83420078A priority Critical patent/EP0123758A1/fr
Publication of EP0123758A1 publication Critical patent/EP0123758A1/fr
Withdrawn legal-status Critical Current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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02—Linings
    • B22D41/023—Apparatus used for making or repairing linings

Definitions

  • This invention relates to a gunning method in which refractories are suitably coated or filled to construction, vessel and apparatus for which a refractory property is required.
  • the nozzles generally used for apparatus of gunning refractory materials are expendables, and therefore they are of the shape of rectilinear pipe as it is or of the shape in which the end of pipe is bent at an angle of some degree, thus principally being of structure of very simple shape.
  • the most nozzles are fixed to a rectilinear pipe connected thereto, so that in gunning refractories by using such nozzles the gunning area is limited to a very narrow one ahead the nozzle and to move the working surface or change the direction of nozzle it is required to change the working position each time.
  • the present invention is to settle such problems and improve the grade and working property of gunning. It is possible to apply this invention for gunning a refractory where a refractory coating or filling is needed, not to speak of melting furnaces such as blast furnace, converter, electric furnace and reverberatory furnace, vessels for molten metal such as ladle and tundish, vessels for treating molten metals used in Rheinetahl-Hereus process and Dortmund Huettenunion process, various industrial heating furnaces, various accessories and accessory positions of all these furnaces and vessels, and appliances and apparatuses used in accompanying working
  • melting furnaces such as blast furnace, converter, electric furnace and reverberatory furnace
  • vessels for molten metal such as ladle and tundish
  • vessels for treating molten metals used in Rheinetahl-Hereus process and Dortmund Huettenunion process various industrial heating furnaces, various accessories and accessory positions of all these furnaces and vessels, and appliances and apparatuses used in accompanying working
  • the invention is to provide a method for the gunning of refractories characterized in that a refractory mixture consisting of a refractory aggregate and a binder is mixed in a nozzle with water, and thereafter the admixture is injected toward the working surface, while said nozzle is slidable and rotatable in the range from the vertical to 45° at the angle to the working surface and further it is turnable by 360° to the axis passing its fulcrum.
  • the nozzle In carrying out the present invention the nozzle, together with the support members connected thereto, carries out at least one of the advancing, traversing, lifting and turning movements to and the retracting movement from the working surface, and the gunning is possible even if the working surface is plane or curved at any angle from horizontal direction to vertical direction.
  • a nozzle mechanism which carries out at least one of the advancing, retracting, traversing, lifting and turning movements, and said nozzle mechanism is provided at the end of a support element (2) with a nozzle (4) through a universal joint (3).
  • the sliding and rotating angle ( ⁇ ) to the vertical line to the inside face (5) being the gunning surface of saif vessel (1) is up to 45° for said nozzle (4).
  • the sliding and rotating angle(8)to the vertical line to said bottom surface (6) is up to 45°.
  • the nozzle support element carries out at least one of the advancing, retracting, traversing, lifting and turning motions while the nozzle itself slides and rotates in the range ut to 45° to the vertical line to the working surface, and therefore it is capable of guuning under optimum conditions to all the working surfaces thereby to obtain homogeneous and strong refractory-coated layers and decrease the loss of gunning refractories.
  • the first feature is such that a refractory mixture consisting of a refractory aggregate and a binder is admixed within a nozzle with water, and therefore the admixture is injected toward the gunning surface. It is for such reason that this system called the nozzle mixing more eliminates the refractory feeding steps and presents more mechanical strength as well as excellent fire and corrosion resis- tancies than in a system in which a refractory mixture and water are previously fed as a slurry to the nozzle.
  • the allowables sliding and rotating range of the nozzle is the peak at the sliding and rotating portion of the nozzle and is limited to a conical range of the vertical angle 90 * wherein the perpendicular to the working surface is the center line, and it is beyond the present invention to slide or rotate the nozzle by exceeding said range.
  • said nozzle is turnable by 360° to the axis passing the nozzle fulcrum while retaining said allowable sliding and rotating range is for such reason that it is possible to make a gunning by turning from the fixed position to the working surface being approximately at the same distance frome the nozzle fulcrum, and in combination with the above features the working property for gunning is improved.
  • the refractory admixture consisting of a refractory aggregate and a binder is meant everything used as refractory gunning materials and it is possible to optionally select ones which meet the use conditions in operation after gunning.
  • the turning angle of the nozzle can be changed by connecting the nozzle to the support element through said universal joint and turning a nozzle arm.
  • the axis if it is the major shaft of an element supporting the nozzle and sometimes it may be a rectilinear pipe which feeds the refractory admixture.
  • the invention relates to a gunning method which jointly uses the nozzle mixing system and the system wherein the turning angle of the nozzle is changeable, so that the obtained refractory-coated layers are strong and homogeneous, and conventional problems can be overcome even in working and economical properties in that the working is simple and the rebound loss is less.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP83420078A 1983-05-02 1983-05-02 Procédé pour projeter des réfractaires Withdrawn EP0123758A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP83420078A EP0123758A1 (fr) 1983-05-02 1983-05-02 Procédé pour projeter des réfractaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83420078A EP0123758A1 (fr) 1983-05-02 1983-05-02 Procédé pour projeter des réfractaires

Publications (1)

Publication Number Publication Date
EP0123758A1 true EP0123758A1 (fr) 1984-11-07

Family

ID=8191487

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83420078A Withdrawn EP0123758A1 (fr) 1983-05-02 1983-05-02 Procédé pour projeter des réfractaires

Country Status (1)

Country Link
EP (1) EP0123758A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2593088A1 (fr) * 1986-01-17 1987-07-24 Godo Seitetsu Robot de pulverisation a chaud pour revetements de four.
EP0286513A1 (fr) * 1987-04-03 1988-10-12 Daussan Et Compagnie Procédé et installation pour projeter un revêtement isolant et réfractaire multicouche et revêtement ainsi obtenu
EP0365803A1 (fr) * 1988-10-01 1990-05-02 Didier-Werke Ag Dispositif pour la projection de matériau de réparation sur une brique perforée

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473737A (en) * 1966-03-09 1969-10-21 Kaiser Aluminium Chem Corp Apparatus for gunning refractory material having adjustable nozzle positioning means
DE2414503A1 (de) * 1973-04-30 1974-11-14 Pfizer Einrichtung zum auftragen eines hitzefesten materials
US4099708A (en) * 1977-08-03 1978-07-11 Riverside Clay Company Apparatus for applying granular refractory material to surfaces
US4163546A (en) * 1978-03-06 1979-08-07 Morris John C Apparatus for applying granular refractory material to surfaces
GB1592360A (en) * 1978-03-22 1981-07-08 Mono Construction Ltd Devices for the application of refractory materials to the walls of furnaces or the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3473737A (en) * 1966-03-09 1969-10-21 Kaiser Aluminium Chem Corp Apparatus for gunning refractory material having adjustable nozzle positioning means
DE2414503A1 (de) * 1973-04-30 1974-11-14 Pfizer Einrichtung zum auftragen eines hitzefesten materials
US4099708A (en) * 1977-08-03 1978-07-11 Riverside Clay Company Apparatus for applying granular refractory material to surfaces
US4163546A (en) * 1978-03-06 1979-08-07 Morris John C Apparatus for applying granular refractory material to surfaces
GB1592360A (en) * 1978-03-22 1981-07-08 Mono Construction Ltd Devices for the application of refractory materials to the walls of furnaces or the like

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2593088A1 (fr) * 1986-01-17 1987-07-24 Godo Seitetsu Robot de pulverisation a chaud pour revetements de four.
DE3639083A1 (de) * 1986-01-17 1987-08-13 Godo Seitetsu Roboter fuer das ausbessern der auskleidung von schmelzoefen durch ausbringen von auskleidungsmaterial unter hitzeeinwirkung des schmelzofens
EP0286513A1 (fr) * 1987-04-03 1988-10-12 Daussan Et Compagnie Procédé et installation pour projeter un revêtement isolant et réfractaire multicouche et revêtement ainsi obtenu
FR2619323A2 (fr) * 1987-04-03 1989-02-17 Daussan & Co Procede et installation pour projeter un revetement isolant et refractaire multicouche et revetement ainsi obtenu
US4908234A (en) * 1987-04-03 1990-03-13 Daussan Et Compagnie Method and installation for spraying a multi-layer insulating refractory coating, and the coating thus obtained
EP0365803A1 (fr) * 1988-10-01 1990-05-02 Didier-Werke Ag Dispositif pour la projection de matériau de réparation sur une brique perforée

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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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AK Designated contracting states

Designated state(s): BE DE FR GB IT LU NL

17P Request for examination filed

Effective date: 19841228

17Q First examination report despatched

Effective date: 19860319

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: 19860730

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TAKASHIMA, MASARU