CN105671331A - Coaxial conductive electroslag furnace for large slabs - Google Patents
Coaxial conductive electroslag furnace for large slabs Download PDFInfo
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- CN105671331A CN105671331A CN201610225196.3A CN201610225196A CN105671331A CN 105671331 A CN105671331 A CN 105671331A CN 201610225196 A CN201610225196 A CN 201610225196A CN 105671331 A CN105671331 A CN 105671331A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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Abstract
The invention discloses a coaxial conductive electroslag furnace for large slabs.The coaxial conductive electroslag furnace comprises a stand column type frame, a bottom water tank and a transformer.A movable beam is installed on the stand column type frame, an electrode swinging device is installed on the movable beam, and an electrode clamping conductive device is installed on the electrode swinging device.A plurality of conductive copper shafts are evenly distributed on the inner side of the stand column type frame in parallel in the vertical direction, and an electric brush assembly is installed on the conductive copper shafts in a sliding mode and connected with the electrode clamping conductive device.Conductive copper pipes with the same axis are correspondingly arranged below the conductive copper shafts respectively and connected with the bottom water tank through a current switch.The transformer is provided with a plurality of outlet copper bars and loop copper bars, all of which are correspondingly arranged in parallel.The outlet copper bars are connected with the conductive copper shafts, and the loop copper bars are connected with the conductive copper pipes.The coaxial conductive electroslag furnace has the advantages that the automation degree is high, the reactive loss of the transformer is low, and operation is easy and convenient.
Description
Technical field
The present invention relates to metal electroslag remelting device technical field, particularly relate to a kind of coaxial conductive heavy slab electroslag furnace.
Background technology
Metal is carried out a kind of metallurgical equipment of melting by the resistance heat that electroslag furnace produces when being and utilize electric current by slag as thermal source. Can reduce the content of gas and field trash in steel after electroslag remelting, and obtain composition uniformly, dense structure, good quality steel ingot.
There is techniques below problem in the electroslag furnace of current home or overseas:
(1) when the short net of smelting heavy slab steel ingot employing coaxial conductive, owing to slab steel ingot profile is huge and be flat, existing coaxial conductive technology cannot uniformly offset its magnetic field produced under big current conditions, short network loss is lost bigger, cause substantial amounts of non-power consumption loss, energy consumption waste height, adds the cost of electroslag ingot.
(2) in tradition large-size electroslag furnace, the pitch adjustment of heavy consutrode is always up a difficult problem for interference electroslag smelting casting quality, owing to dummy electrode and consutrode weight and entire length increase, when big packing ratio, electrode welding process is difficult to adjust in position, affects quality and the performance of the steel ingot that remelting produces.
(3) clip position of traditional electrode in electroslag furnace clamping device is on the top of dummy electrode, and the pressure in electrodes conduct face is provided by electrode holder holding force, the chucking power needed when the weight of electrode is relatively larger is very big, electrodes conduct face stress thus can be caused excessive and deform impaired, reduction of service life.
(4) demoulding (steel ingot being about to smelt takes out in the crystallizer) mode of conventional panels blank electroslag furnace is after steel ingot melting completes, pull down the cooling water pipe of crystallizer, the steel ingot vehicle being loaded with steel ingot and crystallizer is driven to preparation station from melting station, by in steel ingot and crystallizer integral hoisting to the platform of outside, fell and opened crystallizer, steel ingot was hung holding furnace inside holding. There is a lot of shortcoming in this stripping means: operative employee needs dismounting water pipe in pit, and operation is dangerous; Water in water pipe can flow formation hydrops in pit; After cooling water pipe pulled down by crystallizer, temperature raises and is easily caused deformation; Steel ingot melting hangs in holding furnace set-up procedure after completing is loaded down with trivial details, and oversize being unfavorable for of steel ingot traveling time ensures ingot quality.
Summary of the invention
The technical problem to be solved be to provide a kind of overall construction design rationally, transformator reactive loss is low, the coaxial conductive heavy slab electroslag furnace of simple and safe operation.
For solving above-mentioned technical problem, the technical scheme is that
Coaxial conductive heavy slab electroslag furnace, including column framework, bottom water case and transformator, described column framework is provided with the moving beam that can move up and down along column, and described column frame roof is provided with rise fall of electrodes drive system; Described moving beam is provided with electrode pendulous device, described electrode pendulous device is provided with electrode clamping electric installation; Inside described column framework, vertically uniform parallel is provided with some conductive copper axles, and described conductive copper axle is slidably fitted with brush assembly, and described brush assembly clamps electric installation with described electrode and is connected; Being correspondingly arranged on the contact tube that axis is identical below described conductive copper axle respectively, described contact tube is connected with described bottom water case by current switch; Described transformator is provided with outlet copper bar and the loop line copper bar that some correspondences are arranged in parallel, described outlet copper bar and described conductive copper axle and connects, and described loop line copper bar and described contact tube connect.
As preferred technical scheme, it is additionally included in line stripper apparatus, described online stripper apparatus includes the hoisting rig being installed on described moving beam, the column of described column framework is separately installed with hydraulic lifting apparatus, crystallizer outer wall is provided with the brace shoulder matched with described hydraulic lifting apparatus.
As preferred technical scheme, described electrode pendulous device includes the burner being installed on described moving beam, the two ends of described burner are respectively arranged with burner voussoir, the bottom being positioned at described burner voussoir on described moving beam is provided with the driving voussoir coordinated with described burner voussoir, being rotatablely equipped with roller between described driving voussoir and described burner voussoir, described driving voussoir is connected to servo-electric push rod.
As preferred technical scheme, described electrode clamping electric installation includes having rectangular aperture and downward opening electrode jaw, and electrode includes dummy electrode and consutrode, and described dummy electrode upper end is stretched in the rectangular aperture of described electrode jaw; The top of described electrode jaw is provided with the latch that the jack with dummy electrode upper end matches, and described latch is connected to wears pin oil cylinder; The bottom of described electrode jaw is provided with floating electric installation and driving clamping device.
As preferred technical scheme, described floating electric installation includes four groups of conducting blocks supported respectively by butterfly spring, and described conducting block is connected with described brush assembly by being flexible coupling.
As preferred technical scheme, described driving clamping device includes butterfly spring clamping cylinder, and the described telescopic end of butterfly spring clamping cylinder is connected with the lower end of described electrode jaw.
As preferred technical scheme, described rise fall of electrodes drive system includes two servomotors being installed on described column framework top, and the outfan of described servomotor is connected with ball-screw, and described ball-screw and described moving beam are in transmission connection; Described ball-screw is provided with absolute value encoder.
As preferred technical scheme, described column framework includes four root posts, and described column is separately installed with inserted guide rail, and described moving beam is provided with the some groups of directive wheels matched with described guide rail.
Owing to have employed technique scheme, the method have the advantages that
(1) utilize many coaxial conductives that electroslag furnace is smelted electric current and constitute, with loop current, the electrically conducting manner that is arranged in parallel, the magnetic field produced when counteracting electric current through conductor, reduce the reactive loss of transformator, successfully overcoming because slab steel ingot profile is huge and cannot uniformly offset the problem in its magnetic field produced under big current conditions for flat in prior art, the actual pressure drop when smelting 40 tons of slab steel ingots is at below 10V;
(2) by adopting described online stripper apparatus, crystallizer is first disengaged certain distance with steel ingot by the feature utilizing hydraulic system power powerful, then by the hoisting rig being arranged on moving beam, crystallizer is hung out completely again, complete stripping process, the founding garage being loaded with steel ingot sails to preparation station, steel ingot hangs in holding furnace insulation, and operational security is good, easy to operate; Hydraulic lifting apparatus can be accomplished to be synchronized with the movement by hydraulic balance system, it is ensured that the steady demoulding of crystallizer;
(3) by adopting described electrode pendulous device, control the driving voussoir bottom burner two ends to move, making to produce again with the burner on inclined-plane to swing, drive on voussoir equipped with multiple rows of roller, the movement of voussoir becomes the rolling of roller, rolling friction frictional force is only small, driving device can be made to promote voussoir to move easily, drive the inclined-plane that is moved through of voussoir to be converted to thrust upwards, make burner produce to swing, thus regulating the angle of electrode, it is ensured that electrode is parallel with crystallizer inwall;
(4) by adopting described electrode clamping electric installation, conducting block and electrodes conduct face pressure experienced are unrelated with electrode holder holding force, the clamping of electrode is to tangle electrode and then clamped by disc spring clamping cylinder again by wearing pin oil cylinder, the conduction of electrode is then provide pressure by the butterfly spring on floating electric installation, avoid and damage conducting surface when clamping heavier electrode because chucking power is excessive by pressure, and the contact position of electrodes conduct is in dummy electrode bottom, effectively reduce the length of short net, reduce further reactive loss.
Accompanying drawing explanation
The following drawings is only intended to, in the present invention being schematically illustrated and explaining, not delimit the scope of the invention. Wherein:
Fig. 1 is the main TV structure schematic diagram of the embodiment of the present invention;
Fig. 2 is the side-looking structural representation of the embodiment of the present invention;
Fig. 3 is the structural representation of the short net of many coaxial conductives;
Fig. 4 is the structural representation of electrode pendulous device;
Fig. 5 is the structural representation of electrode clamping electric installation;
Fig. 6 is the structural representation of online stripper apparatus.
In figure: 101-column framework; 102-electrode; 103-crystallizer; 104-bottom water case; 105-transformator; 106-moving beam; 107-conductive copper axle; 108-brush assembly; 109-contact tube; 110-current switch; 111-slag bath; 112-slab steel ingot; 200-rise fall of electrodes drive system; 201-servomotor; 202-reductor; 203-ball-screw; 300-electrode pendulous device; 301-burner; 302-burner voussoir; 303-drives voussoir; 304-roller; 305-servo-electric push rod; 400-electrode clamping electric installation; 401-rectangular aperture; 402-electrode jaw; 403-latch; 404-wears pin oil cylinder; 405-butterfly spring; 406-conducting block; 407-butterfly spring clamping cylinder; The online stripper apparatus of 500-; 501-hoisting rig; 502-hydraulic lifting apparatus; 503-props up brace shoulder; 504-founding car.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is expanded on further. In the following detailed description, some one exemplary embodiment of the present invention is only described by the mode of explanation. Undoubtedly, those of ordinary skill in the art will be consequently realised that, when without departing from the spirit and scope of the present invention, it is possible to by various different modes, described embodiment is modified. Therefore, accompanying drawing and description are inherently illustrative, rather than are used for limiting scope of the claims.
As shown in Figures 1 to 6, coaxial conductive heavy slab electroslag furnace, including column framework 101, electrode 102 (including dummy electrode and consutrode), crystallizer 103, bottom water case 104 and transformator 105, being provided with the moving beam 106 that can move up and down along column on described column framework 101, described column framework 101 top is provided with rise fall of electrodes drive system 200; Described moving beam 106 is provided with electrode pendulous device 300, described electrode pendulous device 300 is provided with electrode clamping electric installation 400; Be positioned at around described crystallizer 103 inside column framework 101 vertically uniform parallel be provided with some conductive copper axles 107, described conductive copper axle 107 is slidably fitted with brush assembly 108, described brush assembly 108 clamps electric installation 400 with described electrode and is connected; Being correspondingly arranged on the identical contact tube of axis 109 below described conductive copper axle 107 respectively, described contact tube 109 is connected with described bottom water case 104 by current switch 110 (adopting high-current switch, up to 44000A); Described transformator 105 is provided with outlet copper bar and the loop line copper bar that some correspondences are arranged in parallel, described outlet copper bar and described conductive copper axle 107 connect, described loop line copper bar and described contact tube 109 connect, and thus form the short net of many coaxial conductives between transformator and electroslag furnace.
Smelting current direction is: slag bath → slab steel ingot in transformator → outlet copper bar → conductive copper axle → brush assembly → electrode clamping electric installation → dummy electrode → consutrode → crystallizer;
Loop current flows to: slab steel ingot → bottom water case → current switch → contact tube → loop line copper bar → transformator.
Utilize many coaxial conductives that electroslag furnace is smelted electric current and constitute, with loop current, the electrically conducting manner being arranged in parallel, the magnetic field produced when counteracting electric current through conductor, reduce the reactive loss of transformator, successfully overcome in prior art because of slab steel ingot profile is huge and cannot uniformly offset its magnetic field produced under big current conditions for flat problem, it is demonstrated experimentally that the actual pressure drop when smelting 40 tons of slab steel ingots is at below 10V.
With reference to Fig. 4, described electrode pendulous device 300 includes the burner 301 being installed on described moving beam 106, the two ends of described burner 301 are respectively arranged with burner voussoir 302, the bottom being positioned at described burner voussoir 302 on described moving beam 106 is provided with the driving voussoir 303 coordinated with described burner voussoir 302, being rotatablely equipped with roller 304 between described driving wedge 303 pieces and described burner voussoir 302, described driving voussoir 303 is connected to servo-electric push rod 305. Realizing burner swing by controlling the burner two the servo-electric push rod with voussoir, just as lifting shoulder pole, the flexible of servo-electric push rod drives the movement driving voussoir, makes to produce again with the burner on inclined-plane to swing. Driving on voussoir equipped with multiple rows of roller, the movement of voussoir becomes the rolling of roller, and rolling friction frictional force is only small, and servo-electric push rod can be made to promote voussoir to move easily, and the inclined-plane that is moved through of voussoir is converted to thrust upwards, makes burner produce to swing. Servo-electric push rod is accurately controlled the angle that burner swings, thus regulating the angle of consutrode, it is ensured that consutrode is parallel with crystallizer inwall, improves electroslag remelting quality and performance.
With reference to Fig. 5, described electrode clamping electric installation 400 includes having rectangular aperture 401 and downward opening electrode jaw 402, and dummy electrode upper end is stretched in the rectangular aperture 401 of described electrode jaw 402; The top of described electrode jaw 402 is provided with the latch 403 that the tubaeform jack with dummy electrode upper end matches, and described latch 403 is connected to wears pin oil cylinder 404; The bottom of described electrode jaw 402 is provided with floating electric installation and driving clamping device. Described floating electric installation includes four groups of conducting blocks supported respectively 406 by butterfly spring 405, and described conducting block 406 is connected with described brush assembly 108 by being flexible coupling. Described driving clamping device includes butterfly spring clamping cylinder 407, and the telescopic end of described butterfly spring clamping cylinder 407 is connected with the lower end of described electrode jaw 402. In this device, conducting surface pressure experienced is unrelated with electrode holder holding force, the clamping of electrode is to tangle electrode and then clamped by disc spring clamping cylinder again by wearing pin oil cylinder, the conduction of electrode is then provide pressure by the butterfly spring on floating electric installation, avoid and damage conducting surface when clamping heavier electrode because chucking power is excessive by pressure, and the contact position of electrodes conduct is in dummy electrode bottom, thus effectively reduce the length of short net.
With reference to Fig. 6, it is additionally included in line stripper apparatus 500, described online stripper apparatus 500 includes the hoisting rig 501 being installed on described moving beam 106, the column of described column framework 101 is separately installed with hydraulic lifting apparatus 502, hydraulic lifting apparatus includes the known features such as hydraulic cylinder and lift arm, repeats no more; Described crystallizer 103 outer wall is provided with the brace shoulder 503 matched with described hydraulic lifting apparatus 502. During the demoulding, crystallizer 103 and slab steel ingot 112 are first disengaged certain distance by the feature utilizing hydraulic system power powerful, are then hung out completely by crystallizer by the hoisting rig 501 being arranged on moving beam 106 again, complete stripping process; Then the founding car 504 being loaded with steel ingot drives to preparation station, and steel ingot hangs in holding furnace insulation, job safety, convenience.
Referring again to Fig. 1 and Fig. 2, described rise fall of electrodes drive system 200 includes two servomotors 201 being installed on described column framework 101 top, the outfan of described servomotor 201 is connected with ball-screw 203 by reductor 202, and described ball-screw 203 is in transmission connection with described moving beam 106; Elevating mechanism load-bearing 100 tons, have employed the Redundancy Design of bi-motor reductor, and namely single motor can meet production requirement, it is ensured that the reliability of equipment, it is ensured that the seriality that electroslag produces; Described ball-screw 203 is provided with absolute value encoder, is accurately controlled electrode position by encoder position feedback.
In the present embodiment, body of heater adopts 4 column frame formula structures, and physical dimension is big, and manufacture difficulty is high. Body of heater is high about 16 meters, wide 7 meters, long 8 meters, deep 2.5 meters of pit. Being provided with inserted guide rail on 4 root posts, all column machined surfaces (including guide pass) are an overall processing molding.
Moving beam is that welding structural element, size and weight are all very big. Having 16 groups of directive wheels to be arranged on moving beam, moving beam can move up and down along 4 root post guide pass, adjusts directive wheel and can regulate the gap between moving beam and column guide rail level, to ensure that moving beam operates steadily up and down.
This equipment is provided with the weighing system of advanced person, is provided with 4 set Weighing cell modules, has the features such as high, easy for installation, the novel structure of weighing precision on moving beam; Steel ingot vehicle possesses lifting, translation, traversing, spinfunction, and steel ingot vehicle weighs 150 tons; High-current switch is arranged on steel ingot vehicle, and high-current switch is controlled folding by disc spring hydraulic cylinder. Transformator adopts single phase industrial frequence power supply mode, for T-shaped transformator, 1 grade of 1V;
The requirement of high-quality steel is produced in order to meet plate blank electroslag furnace; it is further equipped with atmosphere protection system, computer control system; computer control system possesses the plurality of advantages such as reliability, stability, seriality, process reproducibility, Redundant Control; there is automaticity height, control the various features such as steady, highly sensitive, easy and simple to handle, durable in use, trackability is strong; it is capable of automatically controlling and combines with Non-follow control; so that it is guaranteed that fusion process is uninterrupted, fully meet large power long time smelting requirements.
The foregoing is only the schematic detailed description of the invention of the present invention, be not limited to the scope of the present invention. Any those skilled in the art, equivalent variations done under without departing from the design of the present invention and the premise of principle and amendment, all should belong to the scope of protection of the invention.
Claims (8)
1. coaxial conductive heavy slab electroslag furnace, including column framework, bottom water case and transformator, described column framework is provided with the moving beam that can move up and down along column, and described column frame roof is provided with rise fall of electrodes drive system; It is characterized in that: described moving beam is provided with electrode pendulous device, described electrode pendulous device is provided with electrode clamping electric installation; Inside described column framework, vertically uniform parallel is provided with some conductive copper axles, and described conductive copper axle is slidably fitted with brush assembly, and described brush assembly clamps electric installation with described electrode and is connected; Being correspondingly arranged on the contact tube that axis is identical below described conductive copper axle respectively, described contact tube is connected with described bottom water case by current switch; Described transformator is provided with outlet copper bar and the loop line copper bar that some correspondences are arranged in parallel, described outlet copper bar and described conductive copper axle and connects, and described loop line copper bar and described contact tube connect.
2. coaxial conductive heavy slab electroslag furnace as claimed in claim 1, it is characterized in that: be additionally included in line stripper apparatus, described online stripper apparatus includes the hoisting rig being installed on described moving beam, the column of described column framework is separately installed with hydraulic lifting apparatus, crystallizer outer wall is provided with the brace shoulder matched with described hydraulic lifting apparatus.
3. coaxial conductive heavy slab electroslag furnace as claimed in claim 1, it is characterized in that: described electrode pendulous device includes the burner being installed on described moving beam, the two ends of described burner are respectively arranged with burner voussoir, the bottom being positioned at described burner voussoir on described moving beam is provided with the driving voussoir coordinated with described burner voussoir, being rotatablely equipped with roller between described driving voussoir and described burner voussoir, described driving voussoir is connected to servo-electric push rod.
4. coaxial conductive heavy slab electroslag furnace as claimed in claim 1, it is characterized in that: described electrode clamping electric installation includes having rectangular aperture and downward opening electrode jaw, electrode includes dummy electrode and consutrode, and described dummy electrode upper end is stretched in the rectangular aperture of described electrode jaw; The top of described electrode jaw is provided with the latch that the jack with dummy electrode upper end matches, and described latch is connected to wears pin oil cylinder; The bottom of described electrode jaw is provided with floating electric installation and driving clamping device.
5. coaxial conductive heavy slab electroslag furnace as claimed in claim 4, it is characterised in that: described floating electric installation includes four groups of conducting blocks supported respectively by butterfly spring, and described conducting block is connected with described brush assembly by being flexible coupling.
6. coaxial conductive heavy slab electroslag furnace as claimed in claim 5, it is characterised in that: described driving clamping device includes butterfly spring clamping cylinder, and the described telescopic end of butterfly spring clamping cylinder is connected with the lower end of described electrode jaw.
7. coaxial conductive heavy slab electroslag furnace as claimed in claim 1, it is characterized in that: described rise fall of electrodes drive system includes being installed on two servomotors on described column framework top, the outfan of described servomotor is connected with ball-screw, and described ball-screw and described moving beam are in transmission connection; Described ball-screw is provided with absolute value encoder.
8. the coaxial conductive heavy slab electroslag furnace as described in any one of claim 1 to 7, it is characterized in that: described column framework includes four root posts, described column is separately installed with inserted guide rail, described moving beam is provided with the some groups of directive wheels matched with described guide rail.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610225196.3A CN105671331B (en) | 2016-04-12 | 2016-04-12 | Coaxial conductive heavy slab electroslag furnace |
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| CN201610225196.3A CN105671331B (en) | 2016-04-12 | 2016-04-12 | Coaxial conductive heavy slab electroslag furnace |
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| CN105671331B CN105671331B (en) | 2017-06-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106086448A (en) * | 2016-08-02 | 2016-11-09 | 合智熔炼装备（上海）有限公司 | Electroslag furnace brush variable-ratio motion and control method |
| CN106756080A (en) * | 2017-02-20 | 2017-05-31 | 潍坊市众诚佳合环保科技股份有限公司 | Coaxial conductive electroslag refining furnace crystallizer |
| CN107604174A (en) * | 2017-10-23 | 2018-01-19 | 沈阳真空技术研究所 | Vacuum cold crucible skull crucible electrode transmission system |
| CN108118159A (en) * | 2017-11-21 | 2018-06-05 | 沈阳金正冶金技术有限公司 | A kind of new consumable metallurgical furnace conductive material bar |
| CN111727093A (en) * | 2018-02-14 | 2020-09-29 | Ald真空技术有限公司 | Remelting device and method for operating a remelting device |
| CN115910638A (en) * | 2022-09-07 | 2023-04-04 | 中国科学院电工研究所 | Large current loop on-off switching mechanism |
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| CN104561573A (en) * | 2014-12-30 | 2015-04-29 | 朱兴发 | Multi-station coaxial electric slag furnace short network device |
| CN205528968U (en) * | 2016-04-12 | 2016-08-31 | 潍坊亚东冶金设备有限公司 | With axle guide TV university template base electroslag furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106086448A (en) * | 2016-08-02 | 2016-11-09 | 合智熔炼装备（上海）有限公司 | Electroslag furnace brush variable-ratio motion and control method |
| CN106756080A (en) * | 2017-02-20 | 2017-05-31 | 潍坊市众诚佳合环保科技股份有限公司 | Coaxial conductive electroslag refining furnace crystallizer |
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| CN108118159A (en) * | 2017-11-21 | 2018-06-05 | 沈阳金正冶金技术有限公司 | A kind of new consumable metallurgical furnace conductive material bar |
| CN111727093A (en) * | 2018-02-14 | 2020-09-29 | Ald真空技术有限公司 | Remelting device and method for operating a remelting device |
| CN111727093B (en) * | 2018-02-14 | 2022-04-15 | Ald真空技术有限公司 | Remelting device and method for operating a remelting device |
| CN115910638A (en) * | 2022-09-07 | 2023-04-04 | 中国科学院电工研究所 | Large current loop on-off switching mechanism |
| CN115910638B (en) * | 2022-09-07 | 2023-11-14 | 中国科学院电工研究所 | High-current loop on-off switching mechanism |
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| CN105671331B (en) | 2017-06-20 |
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