EP0017211A1 - Four électrique de fusion à chauffage par rayonnement - Google Patents

Four électrique de fusion à chauffage par rayonnement Download PDF

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Publication number
EP0017211A1
EP0017211A1 EP19800101714 EP80101714A EP0017211A1 EP 0017211 A1 EP0017211 A1 EP 0017211A1 EP 19800101714 EP19800101714 EP 19800101714 EP 80101714 A EP80101714 A EP 80101714A EP 0017211 A1 EP0017211 A1 EP 0017211A1
Authority
EP
European Patent Office
Prior art keywords
tank
vault
oven according
carriage
jacks
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.)
Ceased
Application number
EP19800101714
Other languages
German (de)
English (en)
French (fr)
Inventor
François Bollee
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.)
Mancelle de Fonderie SA
Original Assignee
Mancelle de Fonderie SA
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 Mancelle de Fonderie SA filed Critical Mancelle de Fonderie SA
Publication of EP0017211A1 publication Critical patent/EP0017211A1/fr
Ceased 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/08—Heating by electric discharge, e.g. arc discharge
    • F27D11/10—Disposition of electrodes
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F27D3/0027—Charging vertically with corbs
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00—Heating by electric discharge
    • H05B7/18—Heating by arc discharge
    • H05B7/22—Indirect heating by arc discharge

Definitions

  • the invention relates to electric melting furnaces with radiation heating, that is to say without direct passage of electric current in the products subjected to melting.
  • Electric radiant heating melting furnaces are usually constituted, in a first embodiment, by a cylindrical melting chamber with a horizontal axis, fixed or oscillating around this axis, and traversed by one or more heating electrodes arranged horizontally, or in another embodiment, by a vertical melting chamber, crossed by one or more heating electrodes arranged horizontally.
  • Certain operations, in particular the loading of these ovens are made by a lateral opening after having removed the electrode (s), and the loading requires placing the various elements of the charge to be melted inside the melting chamber so as to leave the passage for the electrodes which are then returned. This operation, which is generally long and tedious due to the temperature of the oven and the mass of the products, is carried out using cheesy or hooks and causes significant losses of calories and time.
  • the object of the invention is to remedy these losses of time and calories and to bring about an improvement in working conditions by arranging the oven so that all the operations can be done mechanically and without the need to remove the electrodes. nor store the charges to let the electrodes pass.
  • the melting chamber of the furnace is split into two parts, including a lower part 1 or cuvé and an upper part 2 or vault, the latter being placed on the previous one in the manner of a cover and connecting thereto along an appropriate joint surface 3.
  • the - heating electrodes 4 are permanently fixed inside the vault 2 and electrically connected in a suitable manner not shown.
  • the tank 1 can advantageously include a side door 5 making it possible to carry out various current operations in the oven, and a channel or spout 6 which can advantageously be just under the door 5, or any other usual draining method for the metal liquid.
  • any suitable handling means for example an overhead crane or a forklift which lifts and horizontally displaces the arch 2 as shown in FIG. 3, where we see that the vault 2, placed next to the tank 1 on a suitable support not shown, completely releases the upper part of the tank and completely removes the electrodes 4 from the loading operations which take place on this tank .
  • a basket 7 can be used, manipulated by the same overhead crane if necessary, and directly discharging the products into the tank 1.
  • the loading of the tank 1 is therefore carried out without special precautions up to the upper level represented by 8 in FIG. 1 and which must simply be lower than the electrodes 4, for example just below the joint plane 3.
  • This approximately flat distribution is obtained quite naturally by emptying the basket 6 or the loading means used and may in the event of need to be easily retouched by the same mechanical means without requiring a human presence nearby.
  • flexible or sliding electrical connections can be provided to supply the electrodes 4 so as not to have to disconnect and reconnect this supply during movements of movement of the vault or tilting of the tank-vault assembly.
  • the tank 1 is mounted on a carriage 10 by means of a hinge pin 11 preferably located in the vicinity of the pouring spout 6, and a jack 12 carried by this carriage, or even located at a fixed station, makes it possible to cause the desired quantity to gradually switch over.
  • the carriage 10 further comprises wheels 13 and 14, preferably with a traction motor 15 making it possible to move the carriage on rails 16 between two positions, one of which located to the right of the freeze 4 places the tank in the 'interval between two frames 17 serving as support for the vault 2, and another position shown in FIG. 4 where the tank is released from this support.
  • the vault comprises ears or support pieces 19 protruding from the horizontal contour and under each of which comes to apply the rod 20 of a jack 21 carried by the support frames 17 when the assembly is located at the of this support.
  • the flexible connections 22 serving as a current supply for the electrodes.
  • the oven is loaded in the open position shown in fig. 4, exactly as described with reference to FIG. 3. Then instead of bringing the vault 2 onto the tank 1, the carriage is actuated so that it is the tank 1 which is placed under its vault 2. We then only have to lower the vault 2 on this tank by releasing the action of the jacks 21, after which the tank and vault assembly is ready to carry out the melting and emptying operations.
  • the vault 2 separated from the tank 1 undergoes significant losses of calories when it is in position on the support, which can be easily avoided by providing in accordance with the invention, and as shown in broken line in fig. 4, a refractory isolation screen 23 which is fixed by an appropriate support 24 on the carriage 10 at the height just sufficient to come and hide the base of the arch 2.
  • the tank 1 naturally must remain open for loading, but the losses of calories are practically recovered by the load as soon as the loading is started.
  • this chassis also includes the support ears 19, so that all the operations for handling the vault previously described are carried out by resting on the ears of this chassis.
  • the vault is made integral with this chassis by rigid, but easily removable fixing means 40, of known type such as screws and nuts, wing nuts, quarter-turn nuts, or keys, while the part of this chassis which serves for supporting the electrodes can advantageously be provided telescopic by any conventional means known to allow the extraction of the electrode (s) from the vault, in particular with a view to replacing it when it is worn, as shown in lines on the right side of fig. 7b.
  • the advantage of this arrangement is that it makes it possible to use the handling means specific to the oven to facilitate the vault change operations simply by lifting the frame 38 without the vault 2 using the jacks 20 FIG. 4, 5 and 8 and by moving the vault together on the tank if this oven is manufactured according to the second embodiment, or by lifting and moving the frame 3-8 using the U-shaped carriage 29 if this oven is manufactured according to the third embodiment.
  • Fig. 8 shows another arrangement of the jacks 21 for lifting the arch 2, applied to the second embodiment.
  • the jacks 21 are mounted integral with the roof 2 and their piston rods 20 apply their forces to the fixed supports 17. It is obvious that such an arrangement is also applicable to the other embodiments.
  • a fifth embodiment there is still the same set of tank 1 and arch 2 as in the previous examples, and whose handling means can be the same as in the previous examples, but whose refractory screen 23 closing the base of the vault may advantageously be secured to a carriage specially designed to move this screen from its rest position to its position for closing the arch.
  • the invention in particular in its embodiment corresponding to FIG. 4, lends itself to an organization of multiple treatments station by station as illustrated diagrammatically in FIG. 6. It is indeed possible to organize a circuit using the rails 16 of FIG. 4 making it possible to bring the carriages 10 to various stations, including a station 34 where the tank 1 devoid of a vault undergoes a loading operation represented by the arrow. It is then brought by rotation to a station 35 of the type described with reference to FIG. 4 where it receives a fusion vault 2 to undergo the previously described fusion operations.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Furnace Details (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
EP19800101714 1979-04-02 1980-04-01 Four électrique de fusion à chauffage par rayonnement Ceased EP0017211A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7908270 1979-04-02
FR7908270A FR2453578A1 (fr) 1979-04-02 1979-04-02 Four electrique de fusion a chauffage par rayonnement

Publications (1)

Publication Number Publication Date
EP0017211A1 true EP0017211A1 (fr) 1980-10-15

Family

ID=9223849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800101714 Ceased EP0017211A1 (fr) 1979-04-02 1980-04-01 Four électrique de fusion à chauffage par rayonnement

Country Status (2)

Country Link
EP (1) EP0017211A1 (enExample)
FR (1) FR2453578A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478285A1 (fr) * 1978-07-24 1981-09-18 Electro Minerals Inc Four et procede de chargement et d'obturation de la chambre d'un tel four
WO1986003282A1 (en) * 1984-11-19 1986-06-05 Noel Henry Wilson Carbon electrode electric furnace for smelting and refining ores

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR384096A (fr) * 1907-11-16 1908-03-28 Friedrich Bergmann Four à arc électrique
US1359067A (en) * 1919-03-19 1920-11-16 Norske Elektrokemisk Ind As Arrangement of electric-furnace electrodes
DE496463C (de) * 1928-10-27 1930-04-22 Demag Akt Ges Anlage zum Betreiben eines Elektroschmelzofens
CH176748A (de) * 1934-05-03 1935-04-30 Bbc Brown Boveri & Cie Verfahren zur Beschickung von Elektroschmelzöfen mit durch den Deckel eingeführten Elektroden.
FR1187359A (fr) * 1957-11-29 1959-09-10 Protection des voûtes de fours à arcs
DE2049278A1 (de) * 1969-10-09 1971-07-15 Urban Reclamation Technologies Verfahren und Anlage zur kontinuierh chen Herstellung von Stahl

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR384096A (fr) * 1907-11-16 1908-03-28 Friedrich Bergmann Four à arc électrique
US1359067A (en) * 1919-03-19 1920-11-16 Norske Elektrokemisk Ind As Arrangement of electric-furnace electrodes
DE496463C (de) * 1928-10-27 1930-04-22 Demag Akt Ges Anlage zum Betreiben eines Elektroschmelzofens
CH176748A (de) * 1934-05-03 1935-04-30 Bbc Brown Boveri & Cie Verfahren zur Beschickung von Elektroschmelzöfen mit durch den Deckel eingeführten Elektroden.
FR1187359A (fr) * 1957-11-29 1959-09-10 Protection des voûtes de fours à arcs
DE2049278A1 (de) * 1969-10-09 1971-07-15 Urban Reclamation Technologies Verfahren und Anlage zur kontinuierh chen Herstellung von Stahl

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478285A1 (fr) * 1978-07-24 1981-09-18 Electro Minerals Inc Four et procede de chargement et d'obturation de la chambre d'un tel four
WO1986003282A1 (en) * 1984-11-19 1986-06-05 Noel Henry Wilson Carbon electrode electric furnace for smelting and refining ores

Also Published As

Publication number Publication date
FR2453578B1 (enExample) 1982-07-23
FR2453578A1 (fr) 1980-10-31

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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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Inventor name: BOLLEE, FRANCOIS