EP0271580B1 - Procede de revetement par projection au chalumeau d'installations metallurgiques - Google Patents

Procede de revetement par projection au chalumeau d'installations metallurgiques Download PDF

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Publication number
EP0271580B1
EP0271580B1 EP86906033A EP86906033A EP0271580B1 EP 0271580 B1 EP0271580 B1 EP 0271580B1 EP 86906033 A EP86906033 A EP 86906033A EP 86906033 A EP86906033 A EP 86906033A EP 0271580 B1 EP0271580 B1 EP 0271580B1
Authority
EP
European Patent Office
Prior art keywords
flame
oxygen
guniting
gunite
acoustic vibrations
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 - Lifetime
Application number
EP86906033A
Other languages
German (de)
English (en)
Other versions
EP0271580A4 (fr
EP0271580A1 (fr
Inventor
Mikhail Vasilievich Malakhov
Albert Nikolaevich Ivoditov
Jury Ivanovich Zhavoronkov
Viktor Albertovich Breido
Izrail Abramovich Juzefovsky
Igor Pavlovich Tsibin
Alexandr Alexandrovich Shershnev
Oleg Nikolaevich Chemeris
Nina Pavlovna Chernova
Vyacheslav Fedorovich Badakh
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.)
VSESOJUZNY GOSUDARSTVENNY INSTITUT NAUCHNO-ISSLEDO
Original Assignee
VSESOJUZNY GOSUDARSTVENNY INSTITUT NAUCHNO-ISSLEDOVATELSKIKH I PROEKTNYKH RABOT OGNEUPORNOI PROMYSHLENNOSTI
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.)
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Publication of EP0271580A1 publication Critical patent/EP0271580A1/fr
Publication of EP0271580A4 publication Critical patent/EP0271580A4/fr
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0692—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by a fluid
    • 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
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/0021—Devices for monitoring linings for wear
    • 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
    • F27D2001/1657—Solid fuel

Definitions

  • the present invention relates to the metallurgical industry and relates in particular to methods for flame retarding a metallurgical aggregate.
  • a method for goal-locking the refractory lining of a metallurgical unit in which a goal-residue mass is directed in a flame jet over a nozzle onto the refractory lining and an electric constant field is generated between the nozzle and the refractory lining (certificate of origin No. 334464, issued in US Pat USSR and published on 30.03.82 in the bulletin "Discoveries, inventions, utility models and trademarks", No. 12).
  • the particles in the gate flame are charged with the same charge and during the production of the coating, the repulsive forces of the charge of the same name partially take effect, which leads to a lower density of the gate coating compared to the refractory basic lining and consequently to one leads to reduced durability of the door liner.
  • a flame spray device with rocket accelerators is known from EP-A-0052821.
  • a method for flame retarding the lining of a metallurgical unit in which a flame retardant flame consisting of forcretant, fuel and oxygen is directed onto the fire-resistant lining and the flame retardant flame simultaneously with an energetic wave field with an oscillation frequency of 1.0 to 20 kHz is acted on.
  • the energetic wave field propagates throughout the entire internal volume of the unit and acts on the door's torch flame (copyright notice No. 768819, issued in the USSR and published on October 7, 1980 in the bulletin "Discoveries, Inventions, Utility Models and Trademarks", No. 37 ).
  • the wave energy of the field is distributed over the entire internal volume of the unit and a relatively small part of it acts on the door locking flame.
  • the combustion and heat exchange processes in it are not intense enough, as a result of which the fuel particles do not burn completely during the flight time, penetrate into the coating to be applied and burn on its over surface or in it, which in turn leads to an increased porosity of the Goal liner cover and thus result in its lower durability.
  • An increase in the power of the source of the energy field to a value at which the intensification is sufficiently high is impossible due to a harmful field effect on the unit and the operating personnel.
  • the invention has for its object to provide such a method for flame retarding a metallurgical unit, in which the wave action on the goal retardant flame is such that a complete combustion of the fuel particles during their flight time in the goal retarding flame ensures and consequently the durability of the goal retardant coating is increased.
  • the energetic wave field by acoustic in a method for flame retarding a metallurgical unit in which a door torch flame consisting of gate residue mass, fuel and oxygen is directed onto the refractory lining of the unit and acted on it with an energetic wave field Vibrations are generated, where they are maximally concentrated in the gate flame and the acoustic vibrations are generated with an oxygen jet which is directed along the geometric axis of the gate flame and is passed through an ultrasonic whistle.
  • the acoustic shrinkage is generated with two oxygen jets which lie on the opposite sides of the geometric axis of the gate flame, each of them at an angle of max. Is directed 50 ° to this axis and is let through by ultrasonic peening.
  • the gate flame is particularly fully captured by them.
  • the acoustic vibrations are applied with a field intensity of not less than 100 dB.
  • the method according to the invention for flame retarding a metallurgical aggregate makes it possible to greatly increase the durability of the door retort coating with cheaper and simplest means.
  • the method for flame retarding a metallurgical aggregate consists in that a flame retardant flame 3 is directed onto the refractory lining 1 (FIG. 1) of a metallurgical aggregate (not shown) from a blow mold 2 and, at the same time, an energetic field is exerted on this retort flame 3 is generated by acute vibrations "a", these vibrations being maximally concentrated on the gate flame.
  • the blow mold 2 contains a pipeline 4 for the supply of a gate residue with a fuel, a pipeline 5 for the oxygen supply and a pipeline 6 for a coolant, which are arranged coaxially.
  • the pipeline 4 is provided with a nozzle 7 for supplying the gate residue with fuel and the pipeline 5 with a nozzle 8 for supplying oxygen.
  • the nozzle 8 consists of an ultrasound whistle 9 (FIG. 2) and a sound funnel 10.
  • the acoustic vibrations are generated by an oxygen jet which passes along the geometric axis "b" (FIG. 1) of the gate flame the ultrasonic whistle 9 (FIG. 2) flows out.
  • the acoustic vibrations are generated by two oxygen jets which are passed through ultrasonic whistles 11 (FIG. 1), which on the opposite sides of the geometric axis "b" of the gate flame 3 at an angle "a 'of max. 50 °
  • the ultrasonic whistle 11 is essentially similar to the whistle 9, but with an undivided middle part, because the garbage mass flows under the fuel through the nozzle 7 and the main amount of oxygen through the nozzle 12.
  • the method according to the invention for flame retardation was tested on converters in a metallurgical plant. A normal two-component gate secret compound, which contained a refractory and a fuel component, was used for the gate locking. The gate locking was carried out in the vertical position of the converter.
  • the blow mold 2 was placed in the Converter introduced and d
  • the supply of the garbage paste via the nozzle 7 and the oxygen via the nozzle 12 is switched on.
  • the additional oxygen jets were supplied via the ultrasonic pipes 11 arranged on the two sides of the nozzles 7 and 12.
  • the oxygen jets When flowing through the whistle 11, the oxygen jets cause the acoustic oscillations to oscillate, which are directed at an angle of 30 ° to the axis "b" of the gate flame 3.
  • a high-quality door chalk coating is applied to the door chimney flame with the concentrated acoustic vibrations with a field intensity of not less than 100 dB; the wear rate of the coating applied by the process according to the invention is twice as low as the wear rate of the coatings applied by the known processes. From the table it can be seen that the coating is applied particularly effectively under the influence of the acoustic vibrations with an intensity of 140 to 165 dB.
  • the present invention can be used particularly effectively in the repair of the lining of converters, arc beam melting furnaces, Siemens Martin furnaces, pans and other steel melting units in the hot state.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Discharge Heating (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)

Claims (4)

1. Procédé de gunitage à la flamme d'un aggrégat métallurgique, dans lequel une flamme de gunite (3), composée d'une masse de gunite, de combustible et d'oxygène, est dirigée sur le revêtement réfractaire (1) de l'aggrégat et on agit simultanément sur la flamme de gunite (3) par un champ d'ondes énergétique, caractérisé en ce que le champ d'ondes énergétique est produit par des oscillations acoustiques, celles-ci étant concentrées au maximum dans la flamme du gunite et en ce que les oscillations acoustiques sont produites par un jet d'oxygène qui est dirigé le long de l'axe géométrique (b) de la flamme de gunite (3) et amenée à passer à travers un sifflet à ultrasons (9).
2. Procédé selon la revendication 1, caractérisé en ce que les oscillations acoustiques sont produits par deux jets d'oxygène qui sont situés sur les côtés opposés de l'axe géométrique (b) de la flamme de gunite (3), chacun d'eux étant orienté sous un angle de 50° au maximum vers cet axe et ils sont amenés à passer à travers des sifflets à ultrasons (11).
3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que les oscillations acoustiques sont amenées avec une intensité de champ non inférieure à 100 dB.
EP86906033A 1986-06-20 1986-06-20 Procede de revetement par projection au chalumeau d'installations metallurgiques Expired - Lifetime EP0271580B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1986/000062 WO1987007914A1 (fr) 1986-06-20 1986-06-20 Procede de revetement par projection au chalumeau d'installations metallurgiques

Publications (3)

Publication Number Publication Date
EP0271580A1 EP0271580A1 (fr) 1988-06-22
EP0271580A4 EP0271580A4 (fr) 1988-10-06
EP0271580B1 true EP0271580B1 (fr) 1991-01-23

Family

ID=21617011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86906033A Expired - Lifetime EP0271580B1 (fr) 1986-06-20 1986-06-20 Procede de revetement par projection au chalumeau d'installations metallurgiques

Country Status (9)

Country Link
US (1) US4759531A (fr)
EP (1) EP0271580B1 (fr)
JP (1) JPH01500534A (fr)
AT (1) ATE60365T1 (fr)
AU (1) AU590635B2 (fr)
BR (1) BR8607174A (fr)
DE (1) DE3677230D1 (fr)
HU (1) HU199566B (fr)
WO (1) WO1987007914A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU381687A1 (ru) * 1968-03-22 1973-05-22 Способ горячего ремонта металлургических агрегатов цилиндрической формы
SU768819A1 (ru) * 1978-02-21 1980-10-07 Предприятие П/Я А-3244 Способ факельного торкретировани футеровки металлургического агрегата
US4358053A (en) * 1980-11-26 1982-11-09 Metco, Inc. Flame spraying device with rocket acceleration

Also Published As

Publication number Publication date
HUT46372A (en) 1988-10-28
EP0271580A4 (fr) 1988-10-06
DE3677230D1 (de) 1991-02-28
EP0271580A1 (fr) 1988-06-22
JPH01500534A (ja) 1989-02-23
AU590635B2 (en) 1989-11-09
AU6475486A (en) 1988-01-12
US4759531A (en) 1988-07-26
HU199566B (en) 1990-02-28
BR8607174A (pt) 1988-09-13
WO1987007914A1 (fr) 1987-12-30
ATE60365T1 (de) 1991-02-15

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