EP0103515B1 - Embout de lance de gunitage à chaud - Google Patents

Embout de lance de gunitage à chaud Download PDF

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Publication number
EP0103515B1
EP0103515B1 EP83401750A EP83401750A EP0103515B1 EP 0103515 B1 EP0103515 B1 EP 0103515B1 EP 83401750 A EP83401750 A EP 83401750A EP 83401750 A EP83401750 A EP 83401750A EP 0103515 B1 EP0103515 B1 EP 0103515B1
Authority
EP
European Patent Office
Prior art keywords
nozzle
tubes
carrier gas
level
refractory powder
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
EP83401750A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0103515A1 (fr
Inventor
Claude Guenard
Hugues Zanetta
Jean-Claude Grosjean
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.)
Institut de Recherches de la Siderurgie Francaise IRSID
Original Assignee
Institut de Recherches de la Siderurgie Francaise IRSID
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 Institut de Recherches de la Siderurgie Francaise IRSID filed Critical Institut de Recherches de la Siderurgie Francaise IRSID
Priority to AT83401750T priority Critical patent/ATE26884T1/de
Publication of EP0103515A1 publication Critical patent/EP0103515A1/fr
Application granted granted Critical
Publication of EP0103515B1 publication Critical patent/EP0103515B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/16—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed
    • B05B7/20—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion
    • B05B7/201—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion downstream of the nozzle
    • B05B7/205—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas incorporating means for heating or cooling the material to be sprayed by flame or combustion downstream of the nozzle the material to be sprayed being originally a particulate material
    • 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
    • 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

  • the invention relates to a gunning lance tip for projecting a refractory powder through a flame, the lance being connected to a supply of oxidizing gas, combustible gas and refractory powder, one of the gases being the carrier gas. the powder in the nozzle.
  • a gunning lance of this type is known in particular from the document FR 2 419 484. More generally, the guniting techniques have been the subject of numerous studies and patents: reference may be made, for example, to the documents FR 2 168 916 and FR 2 066 355.
  • GB-A-933839 describes a head of this type constituted by a metal block drilled longitudinally several times so as to make a plurality of longitudinal passages therein. Half of them are reserved for the powder, the other half for the combustible gas stream, the passages reserved for the powder more precisely serving as accommodation for attached tubes, which channel the powder to them.
  • the object of the invention is to propose a gunning lance which, while retaining the greatest technical simplicity, nevertheless allows the powder to reach high temperatures, without however having the drawbacks of the solutions mentioned above.
  • the internal cylinder being provided with a front closure at the nose of the nozzle, while it has orifices making the interstitial passage space communicate with its hollow interior volume, this volume being itself even intended to be connected to the non-carrier gas supply.
  • the powder particles are also found to be more homogeneous in pressure and velocities. As a long flame is obtained, the contact time of the particles and the flame is sufficient to ensure a high temperature of the powder.
  • the rejected product is homogeneous and of low porosity. The yield is high.
  • the invention allows the use of a fully pneumatic distribution system, better suited than mechanical distributor systems.
  • the tubes of the same ring are arranged contiguously, at least at the nose of the nozzle.
  • the tube crowns are arranged substantially contiguous with one another and with respect to the cylindrical walls, at least at the level of the nose of the end piece, the ratio of the outlet surfaces thus obtained for the various conduits (tubes on the one hand, interstices on the other hand) allowing a good combination of flow rates and pressures.
  • the endpiece is adaptable to the end of a gunning lance of the type comprising a central duct connected to the supply of non-carrier gas and surrounded by an annular duct connected to the carrier gas supply and refractory powder.
  • the end piece comprises at least thirty tubes.
  • the nozzle 1 subject to the gunning lance 2, comprises a barrel 3 tube holder maintained on the front end of the lance 2 by means of a stainless steel retaining ring 4 brazed at 5 and 6 to the barrel 3 and the cylindrical outline of the lance 2.
  • the stainless steel barrel 3 comprises a central bore 7 of relatively large diameter and two bore crowns 8a and 8b into which 35 copper tubes are inserted distributed over two crowns of tubes 9a and 9b of 150 m long and 3 , 8 mm inside diameter fixed at one of their ends by solder 10.
  • the tubes 9a and 9b form at their other end the nose 11 of the end piece 1: they are contiguous to each other at this level, and are sandwiched between the ends of two substantially cylindrical walls, internal 12 and external 13 respectively.
  • the external wall 13 of copper surrounds the crown of tubes 9b and is brazed on the barrel 3. Although it can be described as substantially cylindrical, it has, in the embodiment shown, in fact a low taper of the order of 3% adapted to the convergence of the tubes 9. The wall 13 can project slightly beyond the nose 11 of the nozzle 1.
  • the internal wall 12 has the shape of a generally hollow cylinder, leveling the nose 11 of the end piece 1, closed on this side by a front wall 14 providing a cavity receiving an insulating refractory 15.
  • the cylindrical wall 12 passes through the central bore 7 of the barrel in which it is centered by centering ribs 16. It has a shoulder 17 in the vicinity of the nose of the lance 2.
  • the lance 2 comprises a central duct 18 connected to a supply of gas which does not carry refractory powder, for example the oxidizer (here oxygen).
  • the central conduit 18 is separated by an annular wall 19 of an annular conduit 20 connected to a supply of refractory powder and carrier gas, for example Is combustible gas.
  • the shoulder 17 has a conical contour 21 which forms an annular passage with an equally conical contour 22 of the barrel 3 leading the refractory powder conveyed by its carrier gas from the outlet of the annulus 20 to the inlets of the tubes 9.
  • a joint in copper 23 ensures the seal between said annular passage and the interstitial space between the tubes 9 and the walls 12 and 13.
  • the cylindrical wall 12 extends towards the inside of the duct 18 of the lance 2 and comes to bear on a surface 25 of an adapter tube 26 to which it is brazed at 27.
  • Eight orifices 28 pass the oxygen arriving through the central duct 18, into the interstitial passage space 24 from which it opens at the level of the nose 11 of the nozzle.
  • a thin brass ring 29 (for example 1/2 mm of splicer) can be interposed between the two tube crowns 9a and 9b, over a short length (15 mm for example).
  • the operation of the device is clear: by injecting into the lance on the one hand gaseous oxygen and on the other hand the refractory powder carried by the combustible gas, the powder and the flame are fractionated, which allows maximum heating of the powder without involving the temperature of the wall.
  • the tip of the invention is therefore particularly well suited to the projection of products with high refractoriness whose use is necessary in steel works.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Finger-Pressure Massage (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
EP83401750A 1982-09-13 1983-09-06 Embout de lance de gunitage à chaud Expired EP0103515B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401750T ATE26884T1 (de) 1982-09-13 1983-09-06 Duese fuer flammspritzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8215461 1982-09-13
FR8215461A FR2533020A1 (fr) 1982-09-13 1982-09-13 Embout de lance de gunitage a chaud

Publications (2)

Publication Number Publication Date
EP0103515A1 EP0103515A1 (fr) 1984-03-21
EP0103515B1 true EP0103515B1 (fr) 1987-04-29

Family

ID=9277405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401750A Expired EP0103515B1 (fr) 1982-09-13 1983-09-06 Embout de lance de gunitage à chaud

Country Status (10)

Country Link
US (1) US4562961A (ja)
EP (1) EP0103515B1 (ja)
JP (1) JPS5966368A (ja)
AT (1) ATE26884T1 (ja)
AU (1) AU564811B2 (ja)
CA (1) CA1200689A (ja)
DE (1) DE3371246D1 (ja)
ES (1) ES525581A0 (ja)
FR (1) FR2533020A1 (ja)
ZA (1) ZA836319B (ja)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2170122B (en) * 1985-01-26 1988-11-30 Glaverbel Process of forming a refractory mass and lance for spraying particulate exothermically oxidisable material
KR960004799B1 (ko) * 1986-12-22 1996-04-13 가와사끼 세이데쓰 가부시끼가이샤 내화 구조물에 내화제를 분무 도포하는 방법 및 장치
US5206059A (en) * 1988-09-20 1993-04-27 Plasma-Technik Ag Method of forming metal-matrix composites and composite materials
US5262206A (en) * 1988-09-20 1993-11-16 Plasma Technik Ag Method for making an abradable material by thermal spraying
US5019686A (en) * 1988-09-20 1991-05-28 Alloy Metals, Inc. High-velocity flame spray apparatus and method of forming materials
US5135166A (en) * 1991-05-08 1992-08-04 Plasma-Technik Ag High-velocity thermal spray apparatus
US5520334A (en) * 1993-01-21 1996-05-28 White; Randall R. Air and fuel mixing chamber for a tuneable high velocity thermal spray gun
US5405085A (en) * 1993-01-21 1995-04-11 White; Randall R. Tuneable high velocity thermal spray gun
US5445325A (en) * 1993-01-21 1995-08-29 White; Randall R. Tuneable high velocity thermal spray gun
US5486676A (en) * 1994-11-14 1996-01-23 General Electric Company Coaxial single point powder feed nozzle
US5692678A (en) * 1995-05-01 1997-12-02 Kawasaki Steel Corporation Flame spraying burner
US6579085B1 (en) 2000-05-05 2003-06-17 The Boc Group, Inc. Burner and combustion method for the production of flame jet sheets in industrial furnaces
US7854397B2 (en) * 2005-01-21 2010-12-21 Specialty Minerals (Michigan) Inc. Long throw shotcrete nozzle
CN103075887A (zh) * 2013-01-24 2013-05-01 张立生 超音速高温陶瓷焊补枪

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1758473A (en) * 1924-06-30 1930-05-13 Schoop Max Ulrich Coating articles, particularly with metals
US1721381A (en) * 1928-02-02 1929-07-16 Gen Electric Gas burner
US2544259A (en) * 1944-11-25 1951-03-06 Duccini Gaetano Metallizing spray gun
US3111267A (en) * 1957-04-18 1963-11-19 Metco Inc Apparatus for applying heat-fusible coatings on solid objects
NL274228A (ja) * 1961-02-01
US3118758A (en) * 1961-03-27 1964-01-21 Union Carbide Canada Ltd Post-mixed oxy-fuel oxide reduction
GB933839A (en) * 1961-06-12 1963-08-14 Pollock & Peel Ltd Improvements in nozzles and a method of making the same
DE1265630B (de) * 1962-02-08 1968-04-04 Metallgesellschaft Ag Flammspritzpistole, insbesondere fuer oxydkeramische Pulver
US3814327A (en) * 1971-04-06 1974-06-04 Gen Electric Nozzle for chemical reaction processes
LU80997A1 (fr) * 1978-03-09 1979-06-18 Centre Rech Metallurgique Procede pour la protection des parois refractaires des recipients metallurgiques
DE7908047U1 (de) * 1979-02-16 1982-04-08 Castolin S.A., 1025 St. Sulpice, Vaud Brennerduese fuer flammspritzgeraete

Also Published As

Publication number Publication date
ES8405507A1 (es) 1984-06-01
EP0103515A1 (fr) 1984-03-21
DE3371246D1 (en) 1987-06-04
JPS5966368A (ja) 1984-04-14
ATE26884T1 (de) 1987-05-15
AU1853383A (en) 1984-03-22
FR2533020B1 (ja) 1985-04-19
ZA836319B (en) 1984-04-25
US4562961A (en) 1986-01-07
FR2533020A1 (fr) 1984-03-16
AU564811B2 (en) 1987-08-27
ES525581A0 (es) 1984-06-01
CA1200689A (fr) 1986-02-18

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