US3290031A - Smelting-furnace, particularly for the production of steel - Google Patents

Smelting-furnace, particularly for the production of steel Download PDF

Info

Publication number
US3290031A
US3290031A US295491A US29549163A US3290031A US 3290031 A US3290031 A US 3290031A US 295491 A US295491 A US 295491A US 29549163 A US29549163 A US 29549163A US 3290031 A US3290031 A US 3290031A
Authority
US
United States
Prior art keywords
furnace
burners
smelting
arch
steel
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
US295491A
Other languages
English (en)
Inventor
Maatsch Jurgen
Borowski Kurt
Hofmann Fritz Justus
Hess Walter
Sixel Gustav-Adolf
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.)
Beteiligungs und Patentverwaltungs GmbH
Original Assignee
Beteiligungs und Patentverwaltungs GmbH
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 Beteiligungs und Patentverwaltungs GmbH filed Critical Beteiligungs und Patentverwaltungs GmbH
Application granted granted Critical
Publication of US3290031A publication Critical patent/US3290031A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5252—Manufacture of steel in electric furnaces in an electrically heated multi-chamber furnace, a combination of electric furnaces or an electric furnace arranged for associated working with a non electric furnace
    • 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
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/30—Arrangements for extraction or collection of waste gases; Hoods therefor
    • F27D17/304—Arrangements for extraction or collection of waste gases; Hoods therefor specially adapted for electric arc furnaces

Definitions

  • the present invention relates to a smelting-furnace, particularly for the production of steel from scrap iron and carburization material, which is heated by means of burners for gaseous, liquid or powdery fuel and oxygen or air enriched with oxygen and in which the discharge of the gases takes place through an opening of the furnace arch over which a movable, for instance, rollable or swingable flue is disposed.
  • the present invention is based on the discovery that the furnace described in said copending patent application, Serial No. 264,635, is particularly suitable for all steel production methods combined with a fining process and in particular also for such methods, in which the fining takes place by blowing of oxygen and/ or in which the reduction is performed with a slag poor in FeO, in such manner, as it is conventional in an arc furnace.
  • the smelting and fining is performed by means of burner heating and the reduction by means of heating with electrodes.
  • oxygen can be blown onto the bath, and in particular, either the burner or predetermined burners can be used for the blowing of the oxygen or particular nozzles are provided for this purpose.
  • Practically all specialties of steel can be produced in this furnace and also such specialties, in which particularly high requirements are put on the quality, as for electric steel, since the reduction of the steel takes place by means of heating the melt with electrodes.
  • the reduction can be performed in the same manner as in an electro furnace with slag poor in FeO.
  • the decarburization and the dephosphorizing can take place, as it is conventional, in connection with open hearth furnaces, by means of the oxydizing flame over the slag. It is also possible, however, to perform the fining step with oxygen, which is blown onto the bath and which reacts directly with the melt.
  • Patented Dec. 6, 1966 It is still another object of the present invention to provide a smelting furnace, particularly for the production of steel, wherein the furnace is fed with liquid pig iron and the latter is subjected to a fining step with oxygen, as in an LD-converter, whereby more scrap iron is added, as it would be done in the normal LD-process, because the heating of the furnace makes possible the feeding of heat for the melting of the scrap iron in larger quantities. After the fining step, and under circumstances upon tapping the dephosphorizing slag, the reduction can then be performed with new slag and with heating of the melt by means of electrodes.
  • FIGURE 1 is a elevation, partly in section, of a melting furnace with swung out electrodes, in case of burner heating; a
  • FIG. 2 is an elevation, partly in section, of the furnace shown in FIG. 1, indicating the position in case of electrode heating;
  • FIG. 3 is a top plan view of two melting furnaces designed in accordance with the present invention.
  • FIG. 4 is an elevation of one of the furnaces shown in FIG. 3, seen from the tapping side in case of operation with burners;
  • FIG. 5 is an elevation of one of the furnaces shown in FIG. 3 seen from slag-out side in case of operation with electrodes.
  • the furnace comprises a circular furnace vessel 1 which is equipped with a central head burner 2 and which includes a hearth 3 receiving the charge, which is molten by means of the central head burner 2.
  • the furnace vessel 1 is tippingly mounted on the rocker 5.
  • a furnace arch 6 is exchangeably mounted on top of the furnace vessel 1 and has a central opening 7 (FIG. 1), through which the furnace gases are discharged into the gas flue 8 and are fed into a waste heat vessel 9.
  • tiltingly disposed lateral burners 12 are provided, which can be lifted and lowered, respectively, in the same manner as the central burner 2, which lateral burners 12 can be adjusted in their position during the melting period to the prevailing surface of the melting charge.
  • the burners 2 and 12 can be used selectively also for blowing-on of oxygen onto the melt, whereby the fuel feed is closed completely or partly, so that free oxygen can be fed to the bath with a quantity of 15 Nm. /t.u.min. preferably about 3 Nm. /t.u.min.
  • One or a plurality of doors 13 and an inspection hole 15 for the observation of the melt are provided in the furnace vessel 1. False air is sucked into the furnace by means of channels 16 which are equally distributed about the periphery of the furnace, which false air cools the arch 6.
  • the flue 8 is swingable by means of a swingable column 19.
  • swingable lifting cylinder 20 is disposed adjacent the furnace, which lifting cylinder 20 serves the purpose of swinging in and out, respectively, the arch lid 6' (FIG. 2) and the electrodes 22, including their carrying device 23 by means of a swinging arm 21.
  • the feed of electric current to the electrodes 22 takes place by means of the current rails 25 and flexible conduits 24.
  • two furnaces are disclosed designed in accordance with the present invention, which are coupled together' such that the burners and the electrodes can be exchangeably used for both furnaces.
  • This has the advantage, that the voluminous device for the electrode operation is better exploited and that the rest and cooling occurring during the burner heating, which reduces the wear on the electrodes, is avoided and shortened, respectively.
  • the two furnaces 31 and 32 are arranged in such mannet, that they can be tapped into a ladel car 33 which is rollable on the tracks 34.
  • Slag buckets 33 and 36 are arranged on the opposite sides on the furnaces 31 and 32.
  • a single gas flue 37 is provided for both furnaces and only one swinging frame 38 is arranged for the electrodes 39.
  • a saturation device and a dust separator 42 are disposed on the swinging arm 41 arranged on the swinging column 40 for the gas flue 37, from which saturation device and dust separator 43 are fed off the gases through the conduit 43, which is rotatable relative to the conduit 43' (FIG. 4).
  • the electrodes 39 are swingable from one furnace to the other by means of the swinging frame 38, which is rollable on a track 44.
  • Both furnace vessels 31 and 32 are not only tiltable on the rockers 46 and 47, but are mounted also rotatably on the rotary devices 48 and 49.
  • the rotation of the furnace vessels should accelerate the melting of the charge. Since the furnace arohes 50 and 51 do not join the rotation, it is possible to reach the entire hearth with the burner flames by a corresponding arrangement of the burners 52 (FIG. 4) on the swinging arm 41 at different distances from the rotating axis of the furnace vessel.
  • the electrode carrying frame 53 is disposed on the swinging frame 38.
  • a transformer 54 which is likewise operative for both furnaces, swings with the swinging frame 38, whereby the latter is supported by the rolling track 44.
  • the dimensioning of the transformer can take into consideration, that it is designed not for the high current requirement for the melting, but for the appreciably lesser current requirement in the fining period.
  • the current is fed to the electrodes 39 by flexible electrical conduits 55.
  • the furnace arch 50, as well as the lid 56 closing the discharge opening, are suspended from the swinging frame 38 for a lifting and lowering movement.
  • the furnace 31 While in the positions of the swinging frames 38 and 40 shown in FIG. 3 of the drawings, the furnace 31 performs a fining operation, the charge is either molten in the furnace 32 by means of the burners 52, or the melt is subjected to fining with oxygen, which is blown thereon through the burners 52 or by means of particular oxygen nozzles. If the devices are to be exchanged after tapping of the fined melt of the furnace 31 into the container 33, the swinging arm 41 is shifted from the position shown in full lines into the position indicated in dash-pointed lines as B in FIG.
  • a smelting furnace particularly for the production of steel, comprising a furnace vessel, an arch having an opening supported by said furnace vessel, said opening in said arch being adapted to discharge gases from said furnace vessel, burner means disposed in the upper portion of said furnace vessel for heating the latter, a flue movably disposed on top of said arch, said burner comprising fuel burners and electrode burners, the latter including a transformer, to be used selectively and exchangeably, and said electrode burners extending through said opening in said arch.
  • the smelting furnace as set forth in claim 1, which includes means for rolling said flue-from its operative, arch covering position into its lateral inoperative position. 3.
  • the smelting furnace as set forth in claim 1, which includes means for swinging said flue from its operative, aroh covering position into its lateral inoperative position. 4.
  • the smelting furnace as set forth in claim 1, which includes means for fining melt formed in said furnace vessel including means for feeding oxygen to said melt. 5.
  • the smelting furnace as set forth in claim 1, which includes a first swinging device carrying said electrode burners,
  • the smelting furnace as set forth in claim 5, wherein said first swinging device carries said electrode burners and said transformer. 7. The smelting furnace, as set forth in claim 5, which includes a lid covering said opening of said arch and being suspended from said first swinging device for a lifting and lowering movement, respectively. 8. The smelting furnace, as set forth in claim 5, wherein said second swinging device carrying said movable flue supports simultaneously said fuel burners. 9. The smelting furnace, as set forth in claim 1, which includes means for coupling said furnace with an equal second furnace, and said electrode burners and said transformer selectively heating one of said furnaces. 10. The smelting furnace, as set forth in claim 9, wherein said flue and said fuel burners are operatively connected selectively with one of said furnaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Details (AREA)
US295491A 1962-11-29 1963-07-16 Smelting-furnace, particularly for the production of steel Expired - Lifetime US3290031A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB0069790 1962-11-29

Publications (1)

Publication Number Publication Date
US3290031A true US3290031A (en) 1966-12-06

Family

ID=6976417

Family Applications (1)

Application Number Title Priority Date Filing Date
US295491A Expired - Lifetime US3290031A (en) 1962-11-29 1963-07-16 Smelting-furnace, particularly for the production of steel

Country Status (3)

Country Link
US (1) US3290031A (de)
AT (1) AT254924B (de)
DE (1) DE1433424B2 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3379815A (en) * 1965-09-08 1968-04-23 Lectromelt Corp Electric arc furnace having two hearths and interchangeable roofs therefor
US3413113A (en) * 1964-07-22 1968-11-26 Rheinstahl Huettenwerke Ag Method of melting metal
US3880648A (en) * 1973-06-27 1975-04-29 Bethlehem Steel Corp Method for producing steel in an electric arc furnace
JPS5016727B1 (de) * 1970-01-19 1975-06-16
US4027862A (en) * 1975-12-19 1977-06-07 Frank W. Schaefer Inc. Metal melting furnace with alternate heating systems
US4755137A (en) * 1985-12-13 1988-07-05 Clecim Process and installation for maintaining the lining of a furnace shell

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1583271C2 (de) * 1967-11-22 1974-11-07 Maerz Ofenbau Gmbh, 4000 Duesseldorf Schmelzgefäß mit aufsetzbarem Deckel zum Vorwärmen von Schrott und zur Stahlerzeugung
DE3102499A1 (de) * 1981-01-27 1982-08-05 Mannesmann AG, 4000 Düsseldorf "stahlschmelzanlage"
JPS6260810A (ja) * 1985-09-10 1987-03-17 Daido Steel Co Ltd スクラツプ溶解方法
DE3840486A1 (de) * 1988-12-01 1990-06-07 Mannesmann Ag Ofenanlage zum einschmelzen von schrott
DE3921807A1 (de) * 1989-07-03 1991-01-10 Mannesmann Ag Verfahren und vorrichtung zum beheizen eines metallurgischen ofens
DE4015916A1 (de) * 1990-05-17 1991-11-21 Fuchs Technology Ag Einschmelzaggregat mit zwei nebeneinander angeordneten schmelzoefen
DE4138120A1 (de) * 1991-11-19 1993-05-27 Fuchs Technology Ag Einschmelzaggregat mit ofenwiege
DE4138118A1 (de) * 1991-11-19 1993-05-27 Fuchs Systemtechnik Gmbh Verfahren und vorrichtung zur stahlherstellung aus metallischem einsatzmaterial
DE4445209C2 (de) * 1994-12-17 1999-01-21 Schloemann Siemag Ag Verfahren und Vorrichtung zum Betreiben eines Doppelgefäß-Lichtbogenofens
DE19509285C2 (de) * 1995-03-15 1997-03-20 Gutehoffnungshuette Man Schmelzgefäßanlage
DE19526704C1 (de) * 1995-07-24 1997-05-07 Asea Brown Boveri Einschmelzaggregat
DE102008012280A1 (de) 2008-03-03 2009-09-10 Fuchs Technology Ag Lichtbogenofen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927142A (en) * 1957-10-30 1960-03-01 Ritetherm Inc Combined electric arc and hydrocarbon fuel heated metal melting furnace and method of melting therewith
US3188065A (en) * 1962-03-15 1965-06-08 Beteiligungs & Patentverw Gmbh Smelting-furnace, particularly for the production of steel
US3197539A (en) * 1962-07-11 1965-07-27 Union Carbide Corp Method of operating electric arc furnace
US3207596A (en) * 1960-09-21 1965-09-21 Richard Thomas & Baldwins Ltd Production of steel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927142A (en) * 1957-10-30 1960-03-01 Ritetherm Inc Combined electric arc and hydrocarbon fuel heated metal melting furnace and method of melting therewith
US3207596A (en) * 1960-09-21 1965-09-21 Richard Thomas & Baldwins Ltd Production of steel
US3188065A (en) * 1962-03-15 1965-06-08 Beteiligungs & Patentverw Gmbh Smelting-furnace, particularly for the production of steel
US3197539A (en) * 1962-07-11 1965-07-27 Union Carbide Corp Method of operating electric arc furnace

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3413113A (en) * 1964-07-22 1968-11-26 Rheinstahl Huettenwerke Ag Method of melting metal
US3379815A (en) * 1965-09-08 1968-04-23 Lectromelt Corp Electric arc furnace having two hearths and interchangeable roofs therefor
JPS5016727B1 (de) * 1970-01-19 1975-06-16
US3880648A (en) * 1973-06-27 1975-04-29 Bethlehem Steel Corp Method for producing steel in an electric arc furnace
US4027862A (en) * 1975-12-19 1977-06-07 Frank W. Schaefer Inc. Metal melting furnace with alternate heating systems
US4755137A (en) * 1985-12-13 1988-07-05 Clecim Process and installation for maintaining the lining of a furnace shell

Also Published As

Publication number Publication date
DE1433424A1 (de) 1969-02-20
AT254924B (de) 1967-06-12
DE1433424B2 (de) 1971-01-28

Similar Documents

Publication Publication Date Title
US3290031A (en) Smelting-furnace, particularly for the production of steel
US5602867A (en) Method of and device for operating an arc furnace with two vessels
US4543124A (en) Apparatus for continuous steelmaking
AU571109B2 (en) Method and apparatus for continuous steelmaking
US5217527A (en) Process for continuous copper smelting
BRPI0706624A2 (pt) processo para fabricar um produto contendo ferro a partir de minério de ferro
US5320799A (en) Apparatus for continuous copper smelting
JPS6294792A (ja) 製鋼炉用装入原料の連続予熱方法および装置
DE3269731D1 (en) Method and apparatus for the direct production of liquid iron
US6544471B1 (en) Method and apparatus for producing high chromium content steels and/or ferroalloys in an electric arc converter
US20250383152A1 (en) Method for operating electric furnace
CN211522247U (zh) 吹氩气精炼高锰钢的系统
US3746325A (en) Basic oxygen steel making facility and method of oxygen refining of steel
US4124200A (en) Converter for refining liquid metals, with heating and blowing in means
AU2009351077A1 (en) Furnace for lead-slag reduction and process for lead-slag reduction
US5380353A (en) Copper smelting apparatus
US2868860A (en) Furnace for steel production
CA2349060A1 (en) Process for melting sponge iron and electric-arc furnace for carrying out the process
US3207596A (en) Production of steel
JP7772242B2 (ja) 溶鉄の製造方法
US3775544A (en) Apparatus for making steel from scrap metal
JPH08311522A (ja) 溶湯容器装置
JPH0867907A (ja) 竪型鉄スクラップ溶解炉の操業方法
NO322992B1 (no) Fremgangsmate og apparat for fremstilling av metaller og metallegeringer
JPS62188715A (ja) スクラツプ溶解装置