US2797251A - Device for holding and moving forward electrodes - Google Patents

Device for holding and moving forward electrodes Download PDF

Info

Publication number
US2797251A
US2797251A US512468A US51246855A US2797251A US 2797251 A US2797251 A US 2797251A US 512468 A US512468 A US 512468A US 51246855 A US51246855 A US 51246855A US 2797251 A US2797251 A US 2797251A
Authority
US
United States
Prior art keywords
electrode
lifting
supporting
shell
electrodes
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
US512468A
Inventor
Damgen Wilhelm
Rumberg Alfred
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.)
Knapsack AG
Knapsack Griesheim AG
Original Assignee
Knapsack AG
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 Knapsack AG filed Critical Knapsack AG
Priority to US512468A priority Critical patent/US2797251A/en
Application granted granted Critical
Publication of US2797251A publication Critical patent/US2797251A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B7/00Heating by electric discharge
    • H05B7/02Details
    • H05B7/10Mountings, supports, terminals or arrangements for feeding or guiding electrodes
    • H05B7/107Mountings, supports, terminals or arrangements for feeding or guiding electrodes specially adapted for self-baking electrodes
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00Chucks or sockets
    • Y10T279/10Expanding

Definitions

  • nzzvzcs FOR HOLDING AND movmc FORWARD ELECTRODES Filed June 1, 1955 v S'Sheets-Sheet 2 INVENTQRS: WILHELM DAMGEN ALFRED RUMBERG THEIR ATTORNEYS June 25, 1957 w. DRMGEN ETAL 2,797,251
  • the present-invention relates to a device for holding and moving forward continuous electrodes in electric furnaces.
  • a lifting device there may be used a supporting device.
  • the term supporting device means a device by which the electrodes are kept at a certain height.
  • the lifting devices may be connected with the electrode by means of a detachable bolt construction, the nuts for the screws or a fiat steel ring provided with female threads being fixed at the inner side of the electrode shell, for example, by welding; the lifting device may also be connected with the electrode by means of a profiled ring, for example a U-shaped steel ring, provided with nuts and fixed at the inner side of the electrode shell, for instance, by welding.
  • Fig. 2 is a cross-sectional view taken on'the line 2-2 of the Fig. 1.
  • Fig. 3 is a sectional elevation of a modified form of lifting mechanism.
  • Figs. 4, 5 and 6 are fragmentary elevations, partly in section, of encircling rings joined to the electrode shell.
  • Figs. 7, 8, 9 and 10 are enlarged sections of details of several parts shown in Figs. 4, 5 and 6 including one variation.
  • Fig. 11 is a side elevation of the outer casing which surrounds a section of electrode. 7
  • Fig. 12 is a top plan view of Fig. 11.
  • Current supply line 1 is arranged in flexible manner between the source of current 2 and current supply plates 3 enabling the latter to follow the movement of electrode shell 4 and electrode 5.
  • Protective shell 6 surrounds current supply plates 3.
  • 7 represents one lifting device group.
  • the second lifting device group is 7a.
  • Lifting devices 7 and 7a carry a ring 8 which encircles electrode 5 and is connected with electrode shell 4 in detachable manner, for example, by means of screws 21, in Figures 4, 5, 6, 8, 9 and 10. Lifting devices 7 and 7a thus carry electrode shell 4 by means of ring 8 and, consequently, electrode 5.
  • Lifting devices 7 and 7a are connected with yoke 9 carrying by means of draw rods 10, if desired replaced by a sheet metal cylinder 15, Figure 3, current supply plates 3 with protective shell 6.
  • Yoke 9 is lifted and lowered by a further lifting device 11 mounted at supporting beam 12.
  • Lifting device 11 carries a second yoke 13 connected with yoke 9 by rods 14.
  • Another construction of the lifting device is shown in Figure 3. It consists of two lifting cylinders 15 mounted on supporting beam 12 and carrying yoke 16.
  • Lifting devices 17 and 17a which correspond to lifting devices 7 and 7a of Figures 1 and 2, are arranged in a manner such that they can also be used for pressing.
  • part 20 is a nut provided with a base plate, the nut being welded, 2d to electrode shell 4.
  • Screw 21 provides the detachable connection of ring 8 with electrode shell 4.
  • Figures 5 and 8 illustrate another method for fixing the out at the electrode shell 4.
  • the sheet metal of the electrode shell is bent towards the inside in a nozzle-like manner 26.
  • Nut 22 provided with a flange, 27 engages the edge of the sheet metal and is welded thereto, 28.
  • the holes in the nuts (2%, 22 or 24) are blind towards the inside of the electrode so that no electrode mass penetrates through the holes when the screws 21 are removed.
  • FIG. 11 illustrates an embodiment of electrode shell a which surrounds a section of electrode 5.
  • the device according to this invention in such a manner that, generally, one of the two lifting device groups is in operation, whilst the other group serves to shift the load to the electrode shell section which has been introduced.
  • the force applied acts on the upper end of the electrode shell.
  • the joints must be welded so that they can carry the total weight of the electrode. This is achieved either by using an electrode shell of sufficient sheet thickness so that the cross section of the sheet metal carries the weight of the electrode, or the electrode shell must correspondingly be reinforced, as illustrated in Figure 12.
  • a hydraulic lifting gear is advantageously used.
  • a process for continuously holding and advancing a continuous electrode in an electro-thermal furnace which comprises the steps 'of supporting an electrode in a vertical position and continuously advancing said electrode downwardly as it is consumed by at least one means capable of lifting and supporting said electrode, supporting a supply segment of additional electrode by another separate means capable of independently lifting and supporting said electrode, adjusting the vertical position of the two lifting and supporting means relative to the other to engage the bottom of the electrode segment and the top of the non-consumed portion of the electrode, joining the segment of electrode to the unconsumed portion of the electrode, and adjusting current resistance in the eleetro-thermal furnace by means of raising and lowering the electrode independently of the other two means for lifting and supporting the electrode.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Description

- June 25, 1957 w. DKMGEN EI'AL 2,797,251
DEVICE FOR HOLDING AND MOVING FORWARD ELECTRQDES 8 N6 H N l GE m 9 Z THAM T G MD ,A h R S M R v NLD I w 155 E 6 HR H 8 LF T a M 1 A 5 Y B 5 5 9 1 m J 7 8 1 1 HP June 1957 w. DKMGEN EI'AL 2,797,251
nzzvzcs: FOR HOLDING AND movmc FORWARD ELECTRODES Filed June 1, 1955 v S'Sheets-Sheet 2 INVENTQRS: WILHELM DAMGEN ALFRED RUMBERG THEIR ATTORNEYS June 25, 1957 w. DRMGEN ETAL 2,797,251
DEVICE FOR HOLDING AND MOVING FORWARD ELECTRODES INVEJKTORS. WILHELM DAMGEN BY ALFRED RUMBERQ THEIR ATTORNEYS United States Patent DEVICE FOR HOLDING AND MOVING FORWARD ELECTRODES Wilhelm Diimgen and Alfred Rumherg, Hurth, near Koln,
Germany, assignors t0 Knapsack-Griesheim Aktiengesellschaft, a corporation of Germany Application June 1, 1955, Serial No. 512,468
7 Claims. (Cl. 13-14) The present-invention relates to a device for holding and moving forward continuous electrodes in electric furnaces.
For the purposes of this invention, the term lifting device means a device by which the electrodes are lifted and lowered. As lifting devices of this kind there may be used mechanical, electric or pneumatic and, more especially, hydraulic devices.
Instead of a lifting device there may be used a supporting device. As used herein, the term supporting device means a device by which the electrodes are kept at a certain height.
It is also possible to use a lifting device together with a bearing device.
We have found a device for holding and moving forward continuous electrodes, for example, Sbderberg electrodes, in electro-therrnal furnaces. This device comprises at least two groups of the lifting and supporting devices. Either of these groups is capable 'of bearing the whole electrode and both are arranged independently of the current supply facilities. The lifting and supporting devices are arranged at a yoke-like mechanism which itself is operated by another lifting device that controls the position of the electrode for regulating the furnace resistance.
The lifting devices may be connected with the electrode by means of a detachable bolt construction, the nuts for the screws or a fiat steel ring provided with female threads being fixed at the inner side of the electrode shell, for example, by welding; the lifting device may also be connected with the electrode by means of a profiled ring, for example a U-shaped steel ring, provided with nuts and fixed at the inner side of the electrode shell, for instance, by welding.
It has proved advantageous to use nuts the holes of which are blind towards the inside of the electrode shell. In practice, the device of this invention is operated in a manner such that the electrodes are moved forward pari passu with their consumption, the forward movement of the electrodes being controlled either from a suitable central point, for example, a switchgear, or they may be moved forward continuously by means of the lifting devices according to their consumption.
In the drawings:
Fig. 1 is a side elevational view partly in section of an embodiment of the present invention.
Fig. 2 is a cross-sectional view taken on'the line 2-2 of the Fig. 1. I
Fig. 3 is a sectional elevation of a modified form of lifting mechanism.
Figs. 4, 5 and 6 are fragmentary elevations, partly in section, of encircling rings joined to the electrode shell.
Figs. 7, 8, 9 and 10 are enlarged sections of details of several parts shown in Figs. 4, 5 and 6 including one variation.
Fig. 11 is a side elevation of the outer casing which surrounds a section of electrode. 7
Fig. 12 is a top plan view of Fig. 11.
In Figures 1 and 2 the numerals designate the following parts:
Current supply line 1 is arranged in flexible manner between the source of current 2 and current supply plates 3 enabling the latter to follow the movement of electrode shell 4 and electrode 5. Protective shell 6 surrounds current supply plates 3. 7 represents one lifting device group. The second lifting device group is 7a. Lifting devices 7 and 7a carry a ring 8 which encircles electrode 5 and is connected with electrode shell 4 in detachable manner, for example, by means of screws 21, in Figures 4, 5, 6, 8, 9 and 10. Lifting devices 7 and 7a thus carry electrode shell 4 by means of ring 8 and, consequently, electrode 5. Lifting devices 7 and 7a are connected with yoke 9 carrying by means of draw rods 10, if desired replaced by a sheet metal cylinder 15, Figure 3, current supply plates 3 with protective shell 6. Yoke 9 is lifted and lowered by a further lifting device 11 mounted at supporting beam 12. Lifting device 11 carries a second yoke 13 connected with yoke 9 by rods 14. Another construction of the lifting device is shown in Figure 3. It consists of two lifting cylinders 15 mounted on supporting beam 12 and carrying yoke 16. Lifting devices 17 and 17a, which correspond to lifting devices 7 and 7a of Figures 1 and 2, are arranged in a manner such that they can also be used for pressing.
the electrode downward by means of yoke 13 and cover 19 which engages ring 8, if the electrode sticks to the current supply plates.
In Figures 4 and 9 part 20 is a nut provided with a base plate, the nut being welded, 2d to electrode shell 4. Screw 21 provides the detachable connection of ring 8 with electrode shell 4.
Figures 5 and 8 illustrate another method for fixing the out at the electrode shell 4. In this embodiment the sheet metal of the electrode shell is bent towards the inside in a nozzle-like manner 26. Nut 22 provided with a flange, 27 engages the edge of the sheet metal and is welded thereto, 28.
Under certain circumstances, for instance, when an electrode shell of minor wall thickness is used, it is advisable to weld the nuts 24 to a fiat steel ring 23 and to connect this ring with the shell by welding (as shown in Figures 6 and 10).
In all cases, the holes in the nuts (2%, 22 or 24) are blind towards the inside of the electrode so that no electrode mass penetrates through the holes when the screws 21 are removed.
When using the device of this invention, it has proved advantageous to control the feed of the electrodes par-i passu with their consumption from a suitable central point, for example, a switchgear, or to move the electrodes continuously forward in accordance with their consumption by means of the lifting devices. As compared with the known devices, the device according to this invention offers the advantage that the expenditure of energy spent on the lowering operation of the electrodes is saved. The electrode must, however, be moved forward not only according to its consumption but it must also be adjusted to comply with the electric conditions desired in the electric furnace.
When a new electrode shell section has been introduced into the furnace, the load is transferred in each particular case from the one lifting device group to the other. it is also possible to operate in such a manner that, generally, both lifting device groups are in operation, one group of which, after introduction of a new electrode shell section, serves to shift the load to the latter. Figure 11 illustrates an embodiment of electrode shell a which surrounds a section of electrode 5.
Finally, it is also possible to use the device according to this invention in such a manner that, generally, one of the two lifting device groups is in operation, whilst the other group serves to shift the load to the electrode shell section which has been introduced. With the, device of this invention, the force applied acts on the upper end of the electrode shell. In view of the fact that the electrode shell consists of various sections welded together, the joints must be welded so that they can carry the total weight of the electrode. This is achieved either by using an electrode shell of sufficient sheet thickness so that the cross section of the sheet metal carries the weight of the electrode, or the electrode shell must correspondingly be reinforced, as illustrated in Figure 12.
Instead of the screws 21 used for connecting the lifting devices with the electrode shell 4, there may also be used other reliable but readily detachable connections, for example, wedges 25, Figure 7.
A hydraulic lifting gear is advantageously used.
We claim:
1. Apparatus for holding and moving forward a continuous electrode in an electro-thermal furnace, said apparatus comprising a plurality of groups of electrode lifting and supporting means, at least two groups of the electrode lifting and supporting means being each capable of independently lifting and supporting an electrode and each of said two groups being arranged independently of current supply means for said electrode, said two electrode lifting and supporting means being arranged and supported by a yoke means, another group of electrode lifting and supporting means connected to said yoke means, and means associated with another group of electrode and supporting means for controlling the position of the said current supply means with reference to said electrode.
2. Apparatus as set forth in claim 1, including an electrode shell supporting said electrode and means detachably connecting said at least two groups of electrode lifting and supporting means to said electrode shell.
3. Apparatus as set forth in claim 2 wherein the electrode shell is of sheet metal, the sheet metal being pierced to provide inwardly extending excess metal portions defining a nozzle-like arrangement and encompassing means forming part of the means for detachably connecting the at least two groups of lifting and supporting means.
4. Apparatus as set forth in claim 3 wherein the means forming part of the means for detachably connecting the at least two groups of lifting and supporting means is a female threaded member.
5. Apparatus as set forth in claim 2 including a ring member fixed to said electrode shell and arranged for detachable connection with each of said at least two groups of electrode lifting and supporting means.
6. Apparatus as set forth in claim 2 wherein said electrode shell and said detachable connecting means form an electrode impervious side wall casing for said electrode.
7. A process for continuously holding and advancing a continuous electrode in an electro-thermal furnace which comprises the steps 'of supporting an electrode in a vertical position and continuously advancing said electrode downwardly as it is consumed by at least one means capable of lifting and supporting said electrode, supporting a supply segment of additional electrode by another separate means capable of independently lifting and supporting said electrode, adjusting the vertical position of the two lifting and supporting means relative to the other to engage the bottom of the electrode segment and the top of the non-consumed portion of the electrode, joining the segment of electrode to the unconsumed portion of the electrode, and adjusting current resistance in the eleetro-thermal furnace by means of raising and lowering the electrode independently of the other two means for lifting and supporting the electrode.
References Cited in the file of this patent UNITED STATES PATENTS 1,972,849 Wisdom Sept. 4, 1934
US512468A 1955-06-01 1955-06-01 Device for holding and moving forward electrodes Expired - Lifetime US2797251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US512468A US2797251A (en) 1955-06-01 1955-06-01 Device for holding and moving forward electrodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US512468A US2797251A (en) 1955-06-01 1955-06-01 Device for holding and moving forward electrodes

Publications (1)

Publication Number Publication Date
US2797251A true US2797251A (en) 1957-06-25

Family

ID=24039224

Family Applications (1)

Application Number Title Priority Date Filing Date
US512468A Expired - Lifetime US2797251A (en) 1955-06-01 1955-06-01 Device for holding and moving forward electrodes

Country Status (1)

Country Link
US (1) US2797251A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896003A (en) * 1957-06-07 1959-07-21 Shawinigan Chem Ltd Apparatus for controlling slipping of continuous electrodes
US2996559A (en) * 1957-06-11 1961-08-15 Heraeus Gmbh W C Method and apparatus for operating a vacuum arc smelting furnace
FR2514981A1 (en) * 1981-10-19 1983-04-22 Elkem As Self-baking Soderberg electrode mounting - with suspended clamping devices on radial ribs of electrode shell

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1972849A (en) * 1929-09-11 1934-09-04 Norske Elektrokemisk Ind As Safety device for electrodes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1972849A (en) * 1929-09-11 1934-09-04 Norske Elektrokemisk Ind As Safety device for electrodes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896003A (en) * 1957-06-07 1959-07-21 Shawinigan Chem Ltd Apparatus for controlling slipping of continuous electrodes
US2996559A (en) * 1957-06-11 1961-08-15 Heraeus Gmbh W C Method and apparatus for operating a vacuum arc smelting furnace
FR2514981A1 (en) * 1981-10-19 1983-04-22 Elkem As Self-baking Soderberg electrode mounting - with suspended clamping devices on radial ribs of electrode shell

Similar Documents

Publication Publication Date Title
US2797251A (en) Device for holding and moving forward electrodes
CN111238221A (en) Rotary sintering furnace and rotary sintering process for diamond saw blade
EP3196575B1 (en) Device and method for positioning at least one electrode for smelting furnaces
US2396663A (en) Electric arc furnace
GB1156273A (en) Walking Beam Furnace
CN104818497A (en) Electrolytic aluminum cathode carbon block preheating device and application method thereof
EP0733299B1 (en) Submerged arc furnace with vertically movable frame
EP0914481A1 (en) Vertical annealing furnace for a strip treatment device
US2469740A (en) Arc furnace with lift and swing aside roof
US4133968A (en) Apparatus for forming self-sintering electrodes
US4438516A (en) Means for an electrothermal smelting furnace
ES2000046A4 (en) PROCEDURE AND INSTALLATION FOR THE MAINTENANCE OF THE COATING OF AN OVEN TANK.
US4646318A (en) Crucible furnace with adjustable electrodes
CA1310048C (en) Self-baking electrode with pressure advancement
US2969454A (en) Welding method and apparatus
US3582483A (en) Process for electrolytically producing aluminum
CN210980832U (en) Electrode clamping device of smelting furnace
CN204608178U (en) Electrolgtic aluminium cathode carbon pieces primary heater unit
US4458352A (en) Method and device providing mobility to a contact shoe independent of an electrode in an electric-arc furnace
US2313837A (en) Electric arc furnace with removable hearth or roof
US2468456A (en) Furnace muffle and supporting means therefor
US2911455A (en) Electrode clamp
US1018727A (en) Electric furnace.
US4216347A (en) Vacuum-electric arc heating system
US1420561A (en) Electric furnace