FR2681937A3 - Device for continuously loading metallic products in loose form into a metallurgical furnace and metallurgical furnace equipped with a loading device - Google Patents
Device for continuously loading metallic products in loose form into a metallurgical furnace and metallurgical furnace equipped with a loading device Download PDFInfo
- Publication number
- FR2681937A3 FR2681937A3 FR9112002A FR9112002A FR2681937A3 FR 2681937 A3 FR2681937 A3 FR 2681937A3 FR 9112002 A FR9112002 A FR 9112002A FR 9112002 A FR9112002 A FR 9112002A FR 2681937 A3 FR2681937 A3 FR 2681937A3
- Authority
- FR
- France
- Prior art keywords
- pipe
- metallurgical furnace
- electromagnet
- furnace
- loading
- 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.)
- Pending
Links
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
- C21C5/5229—Manufacture of steel in electric furnaces in a direct current [DC] electric arc furnace
-
- 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
- C21C5/527—Charging of the electric furnace
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/18—Arrangements of devices for charging
- F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points
-
- 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
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
- F27D13/002—Preheating scrap
-
- 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
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
-
- 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
- F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
- F27D2003/0039—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising magnetic means
-
- 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
- F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
- F27D2003/0063—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities comprising endless belts
-
- 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
- F27D2003/0085—Movement of the container or support of the charge in the furnace or in the charging facilities
- F27D2003/0093—Movement on a slope
-
- 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
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0075—Regulation of the charge quantity
-
- 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
- F27D3/10—Charging directly from hoppers or shoots
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
Description
L'invention est relative au chargement en continu de produits ferromagnétiques susceptibles d'être magnétisés, notamment de ferrailles, dans un four métallurgique par exemple dans un four à arc électrique pour élaboration de l'acier. The invention relates to the continuous loading of ferromagnetic products capable of being magnetized, in particular of scrap, in a metallurgical furnace, for example in an electric arc furnace for steelmaking.
Des dispositifs de chargement en continu de four électrique d'élaboration d'acier sont connus. Des bandes transporteuses amènent de la ferraille qui est déversée dans une goulotte débouchant dans le four à travers un trou percé dans la voûte. Ces dispositifs présentent l'inconvénient que les ferrailles tombent rapidement et de façon dispersée dans le four, ce qui, en particulier, ne permet pas de les préchauffer à l'aide des fumées produites dans le four et les répartit mal dans le bain d'acier liquide. Devices for continuously charging an electric steel-making furnace are known. Conveyor belts bring scrap metal which is poured into a chute opening into the oven through a hole drilled in the roof. These devices have the disadvantage that the scrap falls quickly and dispersed in the oven, which, in particular, does not allow them to preheat using the fumes produced in the oven and distributes them poorly in the bath. liquid steel.
Le but de la présente invention est de remédier à cet inconvénient en proposant un dispositif permettant de contrôler la chute des ferrailles afin soit de les préchauffer soit de les faire tomber dans le four par paquets compacts. The object of the present invention is to remedy this drawback by proposing a device making it possible to control the fall of the scrap in order either to preheat it or to drop it in the oven in compact packages.
A cet effet, l'invention a pour objet un dispositif de chargement en continu de produits métalliques ferromagnétiques susceptibles d'être magnétisés, notamment de ferrailles, dans un four métallurgique fermé à sa partie supérieure par une voûte, par exemple dans un four à arc électrique pour élaboration de l'acier, du type comprenant une conduite débouchant dans le four par un orifice percé dans la voûte et une bande transporteuse d'amenée des produits métalliques dans la conduite caractérisé en ce qu'au moins un électro-aimant associé à des moyens d'activation et de désactivation de ce dernier est disposé sur la paroi de ladite conduite à l'extérieur de celle-ci. To this end, the subject of the invention is a device for continuously loading ferromagnetic metallic products capable of being magnetized, in particular scrap metal, in a metallurgical furnace closed at its upper part by a vault, for example in an arc furnace electric for steelmaking, of the type comprising a pipe opening into the furnace through an orifice drilled in the vault and a conveyor belt for bringing metallic products into the pipe, characterized in that at least one electromagnet associated with means for activating and deactivating the latter is arranged on the wall of said pipe outside thereof.
Les moyens d'activation et de désactivation de l'électro-aimant peuvent être constitués par des moyens de commande de l'alimentation électrique des électro-aimants. The means for activating and deactivating the electromagnet may be constituted by means for controlling the electrical supply of the electromagnets.
Le ou les tronçons de la conduite autour du ou desquels sont disposés les électro-aimants est ou sont inclinés par rapport à la verticale. The section or sections of the pipe around which the electromagnets are arranged is or are inclined relative to the vertical.
De préférence l'angle que fait ou font le ou les tronçons de la conduite autour du ou desquels sont disposés les électro-aimants avec la verticale est compris entre 20 et 40". Preferably the angle made or made by the section or sections of the pipe around which the electromagnets are arranged with the vertical is between 20 and 40 ".
La paroi de la conduite est réalisée en un matériau amagnétique, par exemple en acier inoxydable amagnétique au moins dans ses parties sur lesquelles sont disposés les électro-aimants. The wall of the pipe is made of a non-magnetic material, for example non-magnetic stainless steel at least in its parts on which the electromagnets are arranged.
La conduite d'introduction des produits métalliques susceptibles d'être magnétisés peut être une conduite d'évacuation des fumées produites dans le four. The pipe for introducing metallic products capable of being magnetized can be a pipe for discharging the fumes produced in the furnace.
L'invention concerne également un four métallurgique, notamment un four à arc électrique muni d'un dispositif selon l'invention. The invention also relates to a metallurgical furnace, in particular an electric arc furnace provided with a device according to the invention.
L'invention va maintenant être décrite de façon plus précise mais non limitative en regard des figures annexées. The invention will now be described in a more precise but nonlimiting manner with reference to the appended figures.
La figure 1 est une vue en coupe schématique d'un four à arc électrique à courant continu à une électrode de voûte muni d'un dispositif correspondant à un premier mode de réalisation de l'invention. Figure 1 is a schematic sectional view of a direct current electric arc furnace to a roof electrode provided with a device corresponding to a first embodiment of the invention.
La figure 2 est une vue en coupe schématique d'un four à arc électrique à courant continu à trois électrodes de voûte muni d'un dispositif correspondant à un second mode de réalisation de l'invention. Figure 2 is a schematic sectional view of a direct current electric arc furnace with three vault electrodes provided with a device corresponding to a second embodiment of the invention.
Le four repéré généralement par 1 à la figure 1 comprend une sole 2 en matériau réfractaire, des murs 3 verticaux et une voûte 4 fermant l'enceinte du four 1 à sa partie supérieure. Dans la sole 2 est implantée une électrode 5 de sole et une électrode 6 de voûte pénètre par la voûte 4. Les électrodes 5 et 6 sont connectées à un dispositif d'alimentation électrique non représenté. Le four contient un bain d'acier liquide 7. The oven generally identified by 1 in FIG. 1 comprises a bottom 2 made of refractory material, vertical walls 3 and a vault 4 closing the enclosure of the oven 1 at its upper part. In the sole 2 is located an electrode 5 of the sole and an arch electrode 6 penetrates through the arch 4. The electrodes 5 and 6 are connected to an electrical supply device, not shown. The oven contains a bath of liquid steel 7.
Une canalisation 8 d'évacuation des fumées débouche dans la voûte par une ouverture 9. A smoke evacuation pipe 8 opens into the vault through an opening 9.
Un dispositif selon l'invention, repéré généralement par 10 est implanté sur la voûte 4. A device according to the invention, generally identified by 10, is installed on the roof 4.
Ce dispositif 10 comporte une canalisation 11 qui débouche dans le four par une ouverture 12 percée dans la voûte 4. This device 10 comprises a pipe 11 which opens into the oven through an opening 12 pierced in the roof 4.
La canalisation 11 comporte un premier tronçon 13 incliné par rapport à la verticale, un deuxième tronçon 14 vertical et un troisième tronçon 15 incliné par rapport à la verticale ; ce dernier tronçon se termine par une goulotte 16. The pipe 11 comprises a first section 13 inclined relative to the vertical, a second vertical section 14 and a third section 15 inclined relative to the vertical; this last section ends with a chute 16.
Autour des tronçons 13 et 15 inclinés par rapport à la verticale sont disposés des électro-aimants 17 qui sont reliés à un dispositif 18 d'alimentation électrique et de commande de cette alimentation. Around the sections 13 and 15 inclined relative to the vertical are arranged electromagnets 17 which are connected to a device 18 for supplying power and controlling this supply.
Une bande transporteuse 19 dont l'extrémité 20 se trouve à l'aplomb de la goulotte 16, transporte des amas de ferraille 21 qui tombent dans la goulotte 16 et circulent dans la canalisation 11. Lorsque les électroaimants 17 sont activés, le champ magnétique engendré attire la ferraille qui vient s'agglomérer en des paquets compacts 22 sur la paroi de la conduite au droit des électro-aimants. Lorsqu'on désexcite les aimants les paquets 22 de ferraille se décollent de la paroi de la conduite et tombent dans le four après avoir circulé dans la conduite 11. On introduit ainsi des paquets plus réguliers, ce qui permet d'obtenir une meilleure maîtrise du débit de ferraille que celle apportée par la bande transporteuse seule. A conveyor belt 19, the end 20 of which is plumb with the chute 16, transports clumps of scrap metal which fall into the chute 16 and circulate in the pipe 11. When the electromagnets 17 are activated, the magnetic field generated attracts the scrap metal which comes to agglomerate into compact bundles 22 on the wall of the pipe in line with the electromagnets. When the magnets are de-energized, the packages 22 of scrap metal peel off from the wall of the pipe and fall into the oven after having circulated in the pipe 11. More regular packages are thus introduced, which allows better control of the scrap flow than that provided by the conveyor belt alone.
Pour favoriser le fonctionnement de ce dispositif il est préférable que les tronçons 13 et 15 de la canalisation soient réalisés en acier inoxydable amagnétique. To promote the operation of this device it is preferable that the sections 13 and 15 of the pipe are made of non-magnetic stainless steel.
A la figure 2 on a représenté un deuxième mode de réalisation de l'invention. In Figure 2 there is shown a second embodiment of the invention.
Le four repéré généralement par 30 comporte une sole 31, des murs 32 et une voûte 33. C'est un four à arc à courant continu comportant trois électrodes de sole 34 (deux seulement sont visibles) et trois électrodes de voûte 35 (deux seulement sont visibles). Les électrodes de voûte sont disposées en cercle autour de l'axe du four. The oven generally identified by 30 has a hearth 31, walls 32 and a vault 33. It is a direct current arc furnace comprising three hearth electrodes 34 (only two are visible) and three vault electrodes 35 (only two are visible). The vault electrodes are arranged in a circle around the axis of the furnace.
Entre les électrodes 35 de voûte, la voûte 33 comporte un trou 36 permettant à la fois l'évacuation des fumées produites dans le four et l'alimentation en continu des ferrailles.Between the vault electrodes 35, the vault 33 has a hole 36 allowing both the evacuation of the fumes produced in the oven and the continuous supply of scrap.
Le trou 36 est l'extrémité d'une conduite 37 inclinée par rapport à la verticale d'un angle compris entre 20C et 40 . La conduite 37 est ouverte à son extrémité la plus éloignée du four et par cette ouverture 38 on peut introduire des ferrailles 39 amenées par une bande transporteuse 40. The hole 36 is the end of a pipe 37 inclined relative to the vertical by an angle between 20C and 40. Line 37 is open at its end furthest from the furnace and through this opening 38 it is possible to introduce scrap metal 39 brought by a conveyor belt 40.
Pres de l'extrémité 38, une canalisation 41 est branchée sur la conduite 37. La canalisation 41 sert à l'évacuation des fumées ; elle est reliée à un dispositif d'extraction de fumées non représenté. Near the end 38, a pipe 41 is connected to the pipe 37. The pipe 41 is used for the evacuation of the fumes; it is connected to a smoke extraction device not shown.
Autour de la conduite 37 sont disposés en quinconce contre sa paroi externe, des électro-aimants 42 reliés à un dispositif 43 d'alimentation électrique et de commande de l'alimentation. Around the pipe 37 are arranged staggered against its outer wall, electromagnets 42 connected to a device 43 for power supply and power control.
De préférence, la conduite 37 est réalisée, au moins au droit des électro-aimants en acier inoxydable amagnétique. Preferably, the pipe 37 is made, at least in line with the electromagnets made of non-magnetic stainless steel.
Lorsque les électro-aimants 42 sont activés, le champ magnétique qu'ils créent attire la ferraille qui est déversée par la bande transporteuse et l'agglomère en des paquets 44. Ces paquets de ferraille sont léchés par les fumées chaudes qui sont émises par le four. Ces fumées échauffent les paquets de ferraille et assurent ainsi un préchauffage de la ferraille. Lorsqu'on désactive les électro-aimants, les paquets de ferraille se détachent de la paroi de la canalisation et tombent dans le four. When the electromagnets 42 are activated, the magnetic field which they create attracts the scrap which is poured out by the conveyor belt and agglomerates it in bundles 44. These bundles of scrap are licked by the hot fumes which are emitted by the oven. This smoke heats up the scrap packages and thus ensures that the scrap is preheated. When the electromagnets are deactivated, the scrap bundles detach from the wall of the pipeline and fall into the furnace.
En activant et désactivant alternativement les électro-aimants, on peut réguler le débit de ferraille qui passe par la canalisation et ainsi ajuster le préchauffage. By alternately activating and deactivating the electromagnets, it is possible to regulate the flow of scrap metal which passes through the pipeline and thus adjust the preheating.
I1 est à noter que des dispositifs tels qu'ils viennent d'être décrits peuvent être installés sur tout type de four métallurgique pour l'élaboration de l'acier et en particulier sur des fours à arc électrique à courant alternatif. Ils trouvent application dans le cadre général du chargement continu de tout produit métallifère en vrac comme les ferrailles, mais aussi les préréduits, etc dans la mesure où leur taux de métallisation est suffisamment élevé pour qu'ils se comportent comme des ferrailles sous l'influence d'un champ magnétique. It should be noted that devices as they have just been described can be installed on any type of metallurgical furnace for the production of steel and in particular on alternating current electric arc furnaces. They find application in the general context of the continuous loading of any loose metalliferous product such as scrap, but also pre-reduced, etc. insofar as their metallization rate is high enough for them to behave like scrap under the influence of a magnetic field.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9112002A FR2681937A3 (en) | 1991-09-30 | 1991-09-30 | Device for continuously loading metallic products in loose form into a metallurgical furnace and metallurgical furnace equipped with a loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9112002A FR2681937A3 (en) | 1991-09-30 | 1991-09-30 | Device for continuously loading metallic products in loose form into a metallurgical furnace and metallurgical furnace equipped with a loading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2681937A3 true FR2681937A3 (en) | 1993-04-02 |
Family
ID=9417423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9112002A Pending FR2681937A3 (en) | 1991-09-30 | 1991-09-30 | Device for continuously loading metallic products in loose form into a metallurgical furnace and metallurgical furnace equipped with a loading device |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2681937A3 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005014868A1 (en) * | 2003-07-23 | 2005-02-17 | Outokumpu Technology Oy | Method of charging fine-grained metals into an electric-arc furnace |
| EP2781867A1 (en) * | 2013-03-21 | 2014-09-24 | Siemens VAI Metals Technologies GmbH | Fixing device for steel scrap to be fed into a metallurgical melt container and preheating device |
| EP2792984A1 (en) * | 2013-04-17 | 2014-10-22 | Tekel SA | Method for preparing and feeding metal scrap to an electric smelting furnace for making steel and apparatus for performing the method |
| EP2982922A1 (en) | 2014-08-08 | 2016-02-10 | Primetals Technologies Austria GmbH | Device and method for controlling a retention unit of a shaft arrangement of a smelting furnace |
| EP3559281A4 (en) * | 2016-12-22 | 2020-05-13 | Valery Shver | Systems and methods to preheat ferromagnetic scrap |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1234653A (en) * | 1968-05-27 | 1971-06-09 | ||
| DE2119692A1 (en) * | 1970-04-23 | 1971-11-04 | Goodman D | Method and arrangement for protecting furnace lining |
| EP0187861A1 (en) * | 1984-06-30 | 1986-07-23 | Kim Youn Su | Apparatus for preheating and charging raw materials for electric furnace |
| EP0291701A1 (en) * | 1987-04-21 | 1988-11-23 | Kortec Ag | Charge preheater for preheating the charge of a metallurgical melting installation |
-
1991
- 1991-09-30 FR FR9112002A patent/FR2681937A3/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1234653A (en) * | 1968-05-27 | 1971-06-09 | ||
| DE2119692A1 (en) * | 1970-04-23 | 1971-11-04 | Goodman D | Method and arrangement for protecting furnace lining |
| EP0187861A1 (en) * | 1984-06-30 | 1986-07-23 | Kim Youn Su | Apparatus for preheating and charging raw materials for electric furnace |
| EP0291701A1 (en) * | 1987-04-21 | 1988-11-23 | Kortec Ag | Charge preheater for preheating the charge of a metallurgical melting installation |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005014868A1 (en) * | 2003-07-23 | 2005-02-17 | Outokumpu Technology Oy | Method of charging fine-grained metals into an electric-arc furnace |
| EA008735B1 (en) * | 2003-07-23 | 2007-08-31 | Оутокумпу Текнолоджи Ой | Method of charging fine-grained metals into an electric-arc furnace |
| CN1826417B (en) * | 2003-07-23 | 2012-06-20 | 奥托昆普技术公司 | Method of charging fine-grained metals into an electric-arc furnace and electric-arc furnace |
| US8391331B2 (en) | 2003-07-23 | 2013-03-05 | Outotec Oyj | Method of charging fine-grained metals into an electric-arc furnace |
| EP2781867A1 (en) * | 2013-03-21 | 2014-09-24 | Siemens VAI Metals Technologies GmbH | Fixing device for steel scrap to be fed into a metallurgical melt container and preheating device |
| WO2014146853A1 (en) * | 2013-03-21 | 2014-09-25 | Siemens Vai Metals Technologies Gmbh | Fixing device for steel scrap to be charged in a metallurgical melting vessel, and preheating device |
| EP2792984A1 (en) * | 2013-04-17 | 2014-10-22 | Tekel SA | Method for preparing and feeding metal scrap to an electric smelting furnace for making steel and apparatus for performing the method |
| EP2982922A1 (en) | 2014-08-08 | 2016-02-10 | Primetals Technologies Austria GmbH | Device and method for controlling a retention unit of a shaft arrangement of a smelting furnace |
| EP3559281A4 (en) * | 2016-12-22 | 2020-05-13 | Valery Shver | Systems and methods to preheat ferromagnetic scrap |
| US10989475B2 (en) | 2016-12-22 | 2021-04-27 | Valery Shver | Systems and methods to preheat ferromagnetic scrap |
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