KR20020035874A - Method and device for introducing bulk material into a metallurgical vessel - Google Patents

Abstract

The present invention relates to a method for introducing bulk material into a metal container, in particular to a method of introducing scrap into an arc furnace comprising at least one electrode aligned at a center in a top of the container hermetically sealed with a cover. The bulk material is transferred to the head of the metallurgical vessel in each bulk material reservoir. The opening of the bulk material reservoir is connected to the joining portion of the cover. The bulk material is conveyed from the reservoir through conveying portions connected to the reservoir and passed through the access opening of the cover into the metallurgical vessel. A device capable of practicing the present invention is characterized in that at least one annular portion (16) of the cover (15) is connected to the cover drive device (51) rotatably on the cover plane; The rotatable cover portion (16) comprises at least one conveyance opening (17) through which the bulk material can convey the bulk material into the container top (11); The conveying openings (17) are docked by a docking portion (31) having a sealable wall portion (32); The docking portion 31 may be docked with a bulk material reservoir 41 filled with bulk material; In addition, the bulk material reservoir 41 is connected to one transfer unit 42, 43, 44, wherein the bulk material passes through the transfer opening 17 through which the bulk material passes through the cover 16. It is characterized in that the transfer into the metallurgical vessel top (11) through.

Description

TECHNICAL AND DEVICE FOR INTRODUCING BULK MATERIAL INTO A METALLURGICAL VESSEL

Metal containers are usually filled in batches, whereby electric arc furnaces are charged regularly using scrap baskets.

EP 0 646 652 B1 discloses a steel making apparatus with hermetically sealed electric arc furnace. The electric arc furnace comprises one charging device with at least two reservoirs. The reservoirs are secured to the hanger platform in a manner arranged with respect to both sides of the electrode support arm. The reservoirs have a removable bottom during charging. With these reservoirs, continuous charging of the furnace vessel is not possible.

In DE 197 53 184 A1 a furnace plant for melting metals is known. In the case of the plant, a central tube is provided coaxially with respect to the main shaft of the furnace, and one vessel may be installed in the furnace head, and at least one electrode is disposed in the central tube. In such a reservoir, the contents are interim stored above the upper vessel of the furnace, which is sealed using a cover, and the contents of the contents are charged into the furnace internal space by opening the furnace cover. In such known devices also continuous charging of the furnace is not possible.

In DE 44 07 861 C1 a charging device for electric arc furnaces is known. In the case of the arc furnace, one annular chamber is arranged in the furnace cover, and at the same time, one movable apparatus is provided in the annular chamber, and the movable apparatus is suspended by switching lifting magnets. On the side of the furnace vessel, at least one material feeder protrudes therein, and the material feeder is provided with a lifting magnet which is fixed to the moving device, and the lifting magnets are capable of magnetic reception of the charging material. And throwing the material at any location inside the furnace. The material supply in the furnace direction is via a continuous conveyor belt. This is not the case for batch operation with a standalone bulk material reservoir.

The present invention includes a method for introducing bulk material into a metallurgical vessel, in particular at least one electrode aligned centrally within a vessel hermetically sealed with a cover and scrap in an electric arc furnace comprising a device corresponding to the electrode. It relates to a method for introducing.

1 is a schematic view of a furnace vessel with one bulk material reservoir disposed on a rotatable cover;

2 is a schematic view of a furnace with two bulk material reservoirs projecting outwardly;

3 is a schematic representation of an electric arc furnace with one docking station; And

4A-4C are reduced views of a top view of a furnace vessel with the alignment of the bulk material reservoir.

(Part Number List)

Location list

10 Metallurgical vessels 11 Top 12 Bottom

13 Sleeve 14 Sleeve lock 15 Cover

16 Annular cover 17 Feed opening 18 Charging space

19 Cover Supports / Rollers

Electrical connection

21 Electrode 22 Electrode holder 23 Support arm

24 support column

Docking section

31 Docking station 32 Sealable walls / blinds

33 Molded member 34 Gasket 35 Cover opening

Conveying part

41 Bulk Material Storage 42 Slide Transfer Unit / Slide

43 Transport conveying unit 44 Tilting feeder

45 drive rod 46 tilting and / or pivot unit

47 Covering hood M Center line G Straight

Driving part

51 Cover rotary actuator 52 Slide-driven bulk material reservoir, motor

53 Tilting Drive Bulk Material Storage 54 Conveyor Belt Bulk Material Storage Motor

55 Blyde-Motor 56 Pivot-Driven Bulk Material Reservoir

57 electrode drive

Measuring unit

61 Measuring device 62 Measuring and adjusting unit

It is an object of the present invention to introduce bulk material in a metal container, which transfers the bulk material to the container head part in a batch manner, which is simply constructed and reliably operated, and which enables continuous charging of the bulk material in the top of the container. The present invention provides a method and apparatus for the same.

This object is solved by the features of claim 1 relating to the method and of claim 4 which describe the apparatus.

The mutually independent bulk material units are used for supplying metallurgical vessels according to the invention, for example chutes known in the field of steel fabrication, such as those used in converter operation.

The cover that seals the upper portion of the container of the metallurgical vessel is rotatably formed and has at least one opening. Within the area of the opening is a docking device which is connected to a bulk material reservoir filled with scrap. The bulk material exits the reservoir when the cover is rotated simultaneously. In this way it is possible to reach each arbitrary point of the charge located above the container in the annular region of the core.

Extracting the bulk material from the bulk material reservoir is done in a controlled manner, more precisely by discharging with one slide, by conveying through one conveyor belt or by tilting the entire reservoir. By using independent chutes, operational reliability is increased and the requirement for scrap yards is reduced. In addition, during use of the transport material reservoir in the furnace head, the function of the reservoir can be performed by one other reservoir even in the event of a failure of the reservoir. In this case, another storage device may be installed in the charging area instead of the failed device. In addition, possible defects in the reservoir, in particular in the drive of the conveying mechanism, can be serviced within a separate maintenance area.

As the conveying apparatus, a conveyor belt and an oscillating conveyor driven in any manner are used, together with one slide driven by electricity or by one hydraulic motor.

In a preferred refinement, the bulk material reservoir is placed in one fixture. The fixture acts to change the bulk material angle to a vertical position and, in some cases, to a horizontal position. By means of this tilting unit and / or pivot unit the bulk material reservoir is adjusted, thereby allowing the bulk material to be filled even in areas inaccessible in the furnace top. At this point, it may be considered that the bulk material reservoir itself is simply configured.

In a special embodiment, one measuring and adjusting device is provided for grasping the state of charge in the furnace head, and at the same time control of the feed rate of the conveying device as well as the cover rotation is made via a computer.

Bulk material reservoirs are each placed in docking devices, which ensure an environmentally friendly charging of the metallurgical vessel through suitable gaskets. In a preferred refinement of the invention the gasket is supported in an elastic manner.

Some bulk material reservoirs may be docked in any position of the cover in accordance with the present invention.

In a first embodiment, the bulk material reservoir is placed diagonally on a circular cover while at the same time the bulk material reservoir does not protrude above the cover edge during charging.

In a second embodiment, only the lips of the bulk material reservoir protrude toward the cover, while most of the reservoir surface protrudes above the cover edge. In this case, one or more reservoirs may be docked to the furnace head. In this respect at least two docking units are provided, since continuous charging is possible in this way without interruption.

In a further preferred embodiment, at least three bulk material reservoirs are docked in the furnace head, while at the same time some reservoirs are guided in one line, which is guided in a direction tangential to the centerline of the conveying opening. . In this way some reservoirs never protrude above the cover edge and nevertheless allow for continuous filling of the metal container even in the event of a failure of the bulk material reservoir.

Embodiments of the invention are illustrated in the accompanying drawings.

1 to 3 show metallurgical containers, respectively. In this case the vessel has the form of an electric arc furnace with one vessel top 12 covered by one vessel bottom 12 and a cover 15. The cover 15 or the annular cover portion 16 is rotatably supported in the opening of the upper portion of the container 11 through rollers 19 and is driven by a single cover rotary actuator 51.

1 and 2, one sleeve 13 is provided concentrically with respect to the container top 11, in which one electrode 21 is arranged.

In FIG. 1, the electrode is located in one sleeve 13 which is sealable to the opening of the container top 11, while the electrode 21 is connected to the support arm 23 via one electrode holder 22. The support arm is connected to the support column 24, and the support column is vertically transported through one electrode driving device 57. The sleeve 13 is secured to the vessel top 11 via one sleeve fixture 14.

One annular cover portion 16 is rotatably supported on the cover support 19 not only on the opening of the sleeve 13 but also on the opening of the container top 11. The cover portion 16 includes one conveying opening 17. Within this conveying opening area, a single docking station 31 with a wall 32 formed as a flap, in the present case, is situated.

The docking station 31 is dockable with one bulk material reservoir 41. The docking station 31 is provided with one gasket 34 toward the reservoir 41 to avoid the discharge of dust-containing gas.

The bulk material reservoir 41 is provided with one motor 52 externally, which motor is associated with the drive rod 45, which is connected to the slide 42. By means of the slide 42 the bulk material is moved in the direction of the opening of the bulk material reservoir 41 in a preconfigurable manner and subsequently transferred into the charging space 18 of the container top 11.

In FIG. 2, the electrode is fixed to the opening of the sleeve 13 which is inclined toward the lower part of the container 12 through the electrode holder 22.

The annular charging space 18 is sealed by the annular cover part 16 in its opening part. The annular cover portion 16 is rotatable through the cover support 19, and in this respect is driven by the rotary actuator 51. In the annular cover part 16 there are provided conveying openings 17. In the right part, the conveying opening 17 is covered by the docking part 31, and the docking part has a wall part (blind) 32 which can be sealed.

The bulk material reservoir 41 is placed in the tilting feeder 44, which tilts the bulk material reservoir 41 via one tilting drive 53 or one pivot drive 56. Pivoting the bulk material reservoir in relation to the horizontal alignment through.

The wall portion 32 which can be sealed not only at the time of tilting but also at the turn includes a forming member 33, which ensures an airtight sealing between the docking portion 31 and the front portion of the bulk material reservoir 41. .

On the left side, the bulk material reservoir 41 has one conveying conveying unit 43 in the bottom area, which conveying unit is driveable through one conveyor belt motor 54. The lower belt of the conveyor belt is arranged outside the bulk material reservoir 41, which in this case is formed as a chute.

The conveying conveying unit 43 is connected to one filling state measuring device 61 provided in the upper part of the container 11 via one measuring and adjusting unit 62.

The bulk material reservoir 41 is also covered with a covering hood 47 in this case. The covering hood 47 projects above the lip of the bulk material reservoir 41 in the size of the conveying opening of the annular cover 16.

In the example of the formation of the bulk material reservoir 41 shown here, the docking station is formed as a simple transfer opening 17, which can be sealed using a cover 35.

Two bulk material reservoirs 41 clearly protrude above the cover 16 in FIG. 2. In this case the required support in the steel fabrication bay is no longer shown.

In FIG. 3, the electrode 21 is fixed to the support arm 23 through one fixing device 22, and the fixing arm is vertically transportable through one driving device 57.

In the case of the electric arc furnace according to the invention, a complete cover 15 is supported on the cover support 19 and driven by the drive 51. Shown in the upper right is a front view of the docking station 31, which is transportable by means of one adjustable wall part 32, here a drive 55 together with a blind.

3 clearly shows that the docking station 31 has a specified height, so that the docking station 31 and optionally the bulk material reservoir 41 docked are free of obstructions at the bottom of the support arm 23. It becomes possible to pass.

4A through 4C, plan views of the cover 15 are shown. In the case of FIG. 4A, one bulk material reservoir 41 is docked to the docking station 31 while being guided across the cover 15 in the transverse direction above the sleeve 13 to be disposed.

In figure 4b two docking stations 31 are shown, each with one bulk material reservoir 41. In the right part of FIG. 4 b), the bulk material reservoir can be introduced and discharged, while only being docked to the docking station 31, but the reservoir may be pivoted and tilted.

In FIG. 4 c) several bulk material reservoirs 41 are arranged with the bulk material reservoir 41 centered on a straight line G while the straight line G passes through the conveying opening 17. It is connected to the docking station 31 in such a way that it is arranged in a diagonal direction with respect to the centerline guided.

With such a configuration, the bulk material in the metal container is transferred to the container head portion in a batch manner, which is simply constructed and reliably operated, and enables continuous charging of the bulk material in the upper part of the container. Methods and apparatus for introduction can be provided.

Claims (15)

A method for introducing a bulk material into a metallurgical vessel, in particular a method for introducing scrap into an electric arc furnace comprising at least one electrode disposed centrally in a top of a container hermetically sealed with one cover, The following steps, i.e. a) bulk material is transferred to the head of the metallurgical vessel in several bulk material reservoirs; b) an opening of the bulk material reservoir is connected with a docking portion of the cover; c) bulk material is conveyed from the reservoir through conveying portions connected with the bulk material reservoirs; And d) the bulk material comprising the step of introducing into the metallurgical vessel through the conveying openings in the cover. The method of claim 1 wherein the bulk material is discharged out of the bulk material reservoir. The method of claim 1 wherein the bulk material angle of the bulk material transferred into the metallurgical vessel is preset by controlling the position of the bulk material reservoir. Apparatus for introducing a bulk material into a metal container for carrying out the method according to claim 1, in particular a scrap in an electric arc furnace comprising at least one electrode centrally located within the top of the container sealed by one cover. In the device for introduction, At least one annular portion 16 of the cover 15 is connected to the cover drive 51 so as to be rotatable within the cover plane; The rotatable cover portion (16) comprises at least one conveying opening (17) through which the bulk material is capable of conveying into the container top (11); The conveying openings (17) are docked by a docking portion (31) having a sealable wall portion (32); The docking portion 31 may be docked with a bulk material reservoir 41 filled with bulk material; In addition, the bulk material reservoir 41 is connected to one transfer unit 42, 43, 44, wherein the bulk material passes through the transfer opening 17 through which the bulk material passes through the cover 16. Apparatus, characterized in that the transfer to the metallurgical vessel top (11) through. 5. The conveying unit according to claim 4, wherein the conveying unit has one slide unit (43) in the form of a cross section of the bulk material reservoir (41), said slide unit being the drive rod (45) of the slide motor (52). Device characterized in that it can be driven through. 6. The device according to claim 5, wherein the slide drive (52) is an electric motor or a motor driven by a fluid. 7. Device according to claim 6, characterized in that the slide drive (52) is fixed to the bulk material reservoir (41). 5. Apparatus according to claim 4, characterized in that the bulk material reservoir (41) has a shape at its tip that is associated with the sealable wall portion (32) of the docking portion (31). 9. The docking portion (31) according to claim 8, characterized in that the docking portion (31) comprises one molding member (33) which allows for a preset horizontal and / or vertical position of the docked bulk material reservoir (41). Device. 10. The cover 16 is provided with one tilting and / or pivot unit 46, wherein the bulk material reservoir 41 is horizontal. And vertically movable. Device according to one of the claims 4 to 10, characterized in that the wall of the dock (31) and / or the front of the bulk material reservoir (41) comprises a gasket (34). 12. The device according to claim 11, wherein said gasket (34) is supported in an elastic manner. 5. The device according to claim 4, wherein the conveying units 42, 43, 44 are connected with one state of charge measuring device 61, which is provided in the vessel top 11 via one measuring- and adjusting unit 62. Device characterized in that. 5. The metallurgical vessel according to claim 4, wherein the metallurgical vessel is an electric arc furnace, the arc furnace comprising an annular charging space (18) passing through one sleeve (13) arranged concentrically with respect to the casing of the upper vessel (11); The annular cover part (16) in the shadow area of the charging space (18) is characterized in that it is rotatably formed about the sleeve. 15. The annular cover (10) according to claim 14, wherein the annular cover (10) has at least two conveying openings (17); And the bulk material reservoir 41 can be placed on a straight line G in a diagonal direction with respect to the line guided through the center M of the conveying openings 17, and can be accommodated again. Device.