CN105567908B - Heat the double hose electromagnetic induction RH device and methods of molten steel and removal of inclusions - Google Patents
Heat the double hose electromagnetic induction RH device and methods of molten steel and removal of inclusions Download PDFInfo
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- CN105567908B CN105567908B CN201610027588.9A CN201610027588A CN105567908B CN 105567908 B CN105567908 B CN 105567908B CN 201610027588 A CN201610027588 A CN 201610027588A CN 105567908 B CN105567908 B CN 105567908B
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- tedge
- comer
- molten steel
- removal
- inclusions
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 67
- 239000010959 steel Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 230000006698 induction Effects 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 claims abstract description 3
- 230000007423 decrease Effects 0.000 claims abstract description 3
- 239000011162 core material Substances 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims description 2
- 239000010813 municipal solid waste Substances 0.000 description 16
- 229910000976 Electrical steel Inorganic materials 0.000 description 6
- 238000007670 refining Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000007872 degassing Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000009850 CAS-OB (composition adjustment by sealed argon bubbling with oxygen blowing) Methods 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention provides a kind of double hose electromagnetic induction RH device and methods for heating molten steel and removal of inclusions, described device includes ladle, vacuum chamber, tedge, down-comer, iron core and induction coil, wherein vacuum chamber bottom is equipped with tedge and down-comer, tedge and decline infratubal port are connected with ladle, iron core is solid construction, it is set around tedge or down-comer, coil is wound in by the core portion on the outside of tedge or on the outside of down-comer, and the axis of coil is vertical with the holding of the axis of tedge or down-comer.The method processing step is：（1）Using airlift pump principle molten steel is made to generate shuttling movement in vacuum chamber, tedge and down-comer；（2）Air-cooled or water cooling plant is opened, alternating current, continuous removal of inclusions are passed through in induction coil；（3）It treats that liquid steel temperature rises to more than liquidus curve 10 ~ 300 DEG C, stops being powered, and stop air-cooled or water cooling plant, molten steel is introduced into next process.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, and in particular to a kind of double hose electricity for heating molten steel and removal of inclusions
Magnetic induction RH device and methods.
Background technology
Market has promoted the wilderness demand of steel the exploitation of ultra-low-carbon steel production technology and perfect, the wherein life of most critical
Production. art and technical essential are the development and application of the Secondary Refining Technology of the ultra-clean steels such as ultra-low-carbon steel.In existing numerous stoves
In outer refining techniques, RH SECONDARY REFINING IN A VACUUM CHAMBERs are all with its refining effect is good, process cycle is short, adaptable, processing capacity is big etc.
More features are used by most of iron companies in the world, become the mainstream of secondary furnace outer refining technology.
RH equipment principles are to be equipped with two cycling communicated therewith in degassing room lower part used by RH SECONDARY REFINING IN A VACUUM CHAMBERs
Flow tube, wherein one is tedge, another is down-comer, by two cycle flow tubes insertion molten steel during degassing process, by de-
The pressure difference that gas chamber vacuumizes makes molten steel enter degassing room by pipeline, while driving gases argon is blown into tedge, utilizes bubble
Pump principle guides molten steel by room and the down-comer generation shuttling movement of deaerating, and in the indoor removing gas of degassing.RH purifiers
With vacuum decarburization, vacuum outgas, desulfurization, dephosphorization, heating, uniform liquid steel temperature and uniform molten steel composition and removal of inclusions
Function.On the one hand, the main functions of traditional RH are vacuum decarburizations, for field trash, its removal rate be not it is particularly evident, simultaneously
Add the aluminium temperature-rise period later stage, substantial amounts of alundum (Al2O3) field trash can be generated, influence the degree of purity of molten steel.On the other hand, RH
Vacuum decarburization early period carries out heat temperature raising using LF stoves and CAS-OB to molten steel, and link is more, time consumption and energy consumption, and operating process is more multiple
It is miscellaneous.
The content of the invention
In view of the problems of the existing technology, the present invention provides a kind of double hose electromagnetism for heating molten steel and removal of inclusions
Sense RH device and methods, efficient uniform heating molten steel and the field trash in molten steel can be removed.Technical scheme is as follows：
A kind of double hose electromagnetic induction RH devices for heating molten steel and removal of inclusions, including ladle, vacuum chamber, rising
Pipe, down-comer, iron core and induction coil, wherein vacuum chamber bottom are equipped with tedge and down-comer, tedge and down-comer lower end
Mouthful connect with ladle, iron core is solid construction, around tedge or down-comer setting, coil be wound in by tedge outside or under
Core portion on the outside of pipe drops, and the axis of coil is vertical with the holding of the axis of tedge or down-comer.
The iron core is equipped with supporting rod, is connected with outside support, for secured core；Iron core material is high permeability
Soft magnetic materials, preferably silicon steel sheet；Iron core size is formulated according to the caliber size and coil power of tedge or down-comer.
The heating power of the induction coil is 1 ~ 1000KW, and the material of induction coil is acid bronze alloy, including fine copper, purple
Copper.
Smelting steel grade includes silicon steel, ultra-low-carbon steel.
In above-mentioned two-tube RH devices, air-cooled or water cooling plant is additionally provided with, is arranged on outside the two-tube RH devices, for dropping
Low coil temperatures.
A kind of molten steel and the method for removal of inclusions of heating is to use above-mentioned double hose electromagnetic induction heating RH devices, according to
Following processing step carries out：
（1）Molten steel is introduced by down-comer in ladle from vacuum chamber using airlift pump principle；Drawn again by tedge again
Enter in vacuum chamber, molten steel is made to generate shuttling movement in vacuum chamber, tedge and down-comer；
（2）Air-cooled or water cooling plant is opened, alternating current is passed through in induction coil, makes to generate alternating flux in iron core,
Middle size of current is 10 ~ 3000A, and constantly removal of inclusions makes it float to molten steel surface and be attracted to tedge and decline
On the pipeline wall surface of pipe；
（3）It treats that liquid steel temperature rises to more than liquidus curve 10 ~ 300 DEG C, stops being powered, and stop air-cooled or water cooling plant, it will
Molten steel introduces next process.
The principle of apparatus of the present invention removal of inclusions and heating molten steel is construed to：Induction coil is equivalent to transformer once
The molten steel flowed in circuit, tedge and down-comer is equivalent to secondary circuit.According to the action principle of transformer, work as primary circuit
In coil feed after AC power, alternating current generates alternating flux, following alternating flux in the closed magnetic circuit of iron core
Induced potential is generated in the molten steel of tedge and down-comer, since molten steel is conductive, the induced potential is again in molten steel
Sensing electric current is generated, Joule heat is thus generated in molten steel to realize the purpose to molten steel heating, and with molten steel upper
Circulating in riser and down-comer, heat, into entire ladle, molten steel are heated so as to reach efficient uniform by uniform transmission
Purpose.Meanwhile in molten steel heating process, alternating current interacts with the Induced magnetic field generated, and then generates electromagnetic force.
Electromagnetic force presses to molten metal generation the constriction power in tedge or down-comer axle center, while field trash is biased towards the driving of tube wall
Power makes inclusion particle be moved to tube wall direction, is eventually adhering on tube wall, and refractory material in the pipe wall, which can adsorb, to be mingled with
Object and remove, while tedge and the substantial amounts of bubble of down-comer pipeline wall surface equally can also capture inclusion floating and remove.
Under the action of electromagnetic force, inclusion particle movement is accelerated, and particles collision probability is caused to become larger, can promote growing up for field trash.
The removal of field trash is mainly collided by Blang, turbulent flow collision and Stokes are collided, and field trash is promoted to grow up and floats and removes.
So under electromagnetic force, particles collision rate is substantially accelerated.It is effectively facilitated field trash（For example, main component is three oxygen
Change the field trash of two aluminium and silicate）It grows up removal.
Beneficial effects of the present invention are：Apparatus of the present invention are utilized installs iron core and induction coil generation joule outside down-comer
Heat and electromagnetic force, Joule heat can effectively heat molten steel, it is convenient to omit traditional RH early periods are risen by LF stoves and CAS-OB
Add in the link of temperature or omission RH in aluminium heating by O2 blowing technique or omission RH using electrode heating apparatus.Electromagnetic force can make
Field trash in tedge and down-comer in molten steel is moved to tube wall, make wall adsorption field trash, especially alundum (Al2O3) and
Silicate is effectively removed.Apparatus of the present invention are solving the problems, such as conventional apparatus using external heat time consumption and energy consumption, cumbersome
While, chemical composition in molten steel can also be made more uniform.And sense electric current also has during being heated to molten steel
The advantages of noise is small, and the efficiency of heating surface is up to 90%, and heat waste is few.In addition, apparatus of the present invention design is simple, it is easy to operate easily controllable.
Description of the drawings
Fig. 1 is the heating molten steel of the embodiment of the present invention 1 and the double hose electromagnetic induction heating RH devices of removal of inclusions
Front view, wherein iron core are single port type, are surrounded on down-comer；One coil is wrapped on iron core；
Fig. 2 is the sectional view in A-A faces in Fig. 1；
Wherein, 1 is vacuum chamber；2 be tedge；3 be ladle；4 be iron core；5 be induction coil；6 be down-comer；7 be branch
Strut.
Specific embodiment
An embodiment of the present invention is described further below in conjunction with the accompanying drawings.
A kind of double hose electromagnetic induction heating RH device devices for heating molten steel and removal of inclusions, as shown in Figure 1 and 2, bag
Ladle 3, vacuum chamber 1, tedge 2, down-comer 6, iron core 4 and induction coil 5 are included, wherein 1 bottom of vacuum chamber is equipped with 2 He of tedge
Down-comer 6, tedge 2 and 6 lower port of down-comer are connected with ladle 3, and iron core 4 is solid square structure, around tedge 2 or
Down-comer 6 is set, and coil 5 is wound in the core portion by 6 outside of down-comer, and the axis of coil 5 and the axis of down-comer 6 are protected
It holds vertical.
The iron core 4 is equipped with supporting rod 7, is connected with outside support, and for secured core, iron core material is silicon steel sheet.
The heating power of the induction coil is 100KW, and the material of induction coil is red copper.
In above-mentioned two-tube RH devices, air cooling equipment is additionally provided with, is arranged on outside the two-tube RH devices, for reducing coil
Temperature.
Using the method for above-mentioned two-tube RH devices heating silicon steel molten steel and removal of inclusions, according to following processing step into
Row：
（1）Silicon steel molten steel is introduced by down-comer in ladle from vacuum chamber using airlift pump principle；Pass through tedge again
It is introduced into again in vacuum chamber, molten steel is made to generate shuttling movement in vacuum chamber, tedge and down-comer；
（2）Air-cooled or water cooling plant is opened, alternating current is passed through in induction coil, makes to generate alternating flux in iron core,
Middle size of current is 1000A, and constantly removal of inclusions makes it float to molten steel surface and be attracted to tedge and down-comer
Pipeline wall surface on；
（3）It treats that liquid steel temperature is risen between 1510 ~ 1570 DEG C, stops being powered, and stop air-cooled or water cooling plant, by silicon steel
Molten steel introduces next process.
During above-mentioned double hose electromagnetic induction heating RH devices heating molten steel and removal of inclusions is used, gas is utilized
Bubble pump principle guides molten steel to enter from vacuum chamber 1 by down-comer 6 in ladle 3；Entered again in vacuum chamber 1 by tedge 2 again,
So as to the shuttling movement in vacuum chamber, tedge, down-comer and ladle.When being passed through alternating current in induction coil 5, generated in iron core
Exchange flux, tedge 2 and down-comer 6 form the secondary coil of single turn with vacuum chamber 1 and ladle 3, since iron core 4 has well
Magnetic conduction effect, more than 99% magnetic flux circulates along the iron core 4 being closed, generates electromagnetic field, sensing is generated in entire molten steel circuit
Electromotive force.Simultaneously because molten steel makes molten steel generate Joule heat, temperature constantly raises, and circulating for molten steel is proper there are resistance
Play the role of being sufficiently stirred well, so as to which entire liquid steel temperature be driven uniformly to raise.On the other hand, the electromagnetic force that molten steel generates, makes
Molten steel is shunk to pipeline center, and under the effect of constriction power, field trash is subject to the activation force to pipeline wall surface, makes field trash
It is moved to tube wall direction, a part by pipeline wall adsorption, by the produced bubble of driving gas taken away by another part；With this
Meanwhile field trash forces inclusion particle collision fiercer, promotes growing up for field trash, together after constriction power is subject to act on
When constantly to tube wall direction assemble, effectively facilitated the removal of field trash.
Claims (4)
1. a kind of double hose electromagnetic induction RH devices for heating molten steel and removal of inclusions, it is characterised in that including ladle, vacuum
Room, tedge, down-comer, iron core and induction coil, wherein vacuum chamber bottom are equipped with tedge and down-comer, tedge and decline
Infratubal port is connected with ladle, and iron core is solid construction, is set around tedge or down-comer, and coil is wound in outside by tedge
Core portion on the outside of side or down-comer, and the axis of coil is vertical with the holding of the axis of tedge or down-comer；The iron core
The supporting rod for secured core is equipped with, is connected with outside support.
2. a kind of double hose electromagnetic induction RH devices for heating molten steel and removal of inclusions according to claim 1, special
Sign is the soft magnetic materials that the iron core material is high permeability.
3. a kind of double hose electromagnetic induction RH devices for heating molten steel and removal of inclusions according to claim 1 or 2,
It is characterized in that being additionally provided with the air-cooled or water cooling plant for reducing coil temperature in described device, is arranged on the two-tube RH devices
It is external.
It is 4. special using the method for double hose electromagnetic induction RH devices described in claim 1 heating molten steel and removal of inclusions
Sign is to carry out according to following processing step：
（1）Molten steel is introduced by down-comer in ladle from vacuum chamber using airlift pump principle；It is introduced again by tedge again true
In empty room, molten steel is made to generate shuttling movement in vacuum chamber, tedge and down-comer；
（2）Air-cooled or water cooling plant is opened, alternating current is passed through in induction coil, makes to generate alternating flux in iron core, wherein electricity
Stream size is 10 ~ 3000A, and constantly removal of inclusions makes it float to molten steel surface and is attracted to tedge and down-comer
On pipeline wall surface；
（3）It treats that liquid steel temperature rises to more than liquidus curve 10 ~ 300 DEG C, stops being powered, and stop air-cooled or water cooling plant, by molten steel
Introduce next process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610027588.9A CN105567908B (en) | 2016-01-18 | 2016-01-18 | Heat the double hose electromagnetic induction RH device and methods of molten steel and removal of inclusions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610027588.9A CN105567908B (en) | 2016-01-18 | 2016-01-18 | Heat the double hose electromagnetic induction RH device and methods of molten steel and removal of inclusions |
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| Publication Number | Publication Date |
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| CN105567908A CN105567908A (en) | 2016-05-11 |
| CN105567908B true CN105567908B (en) | 2018-05-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106596669A (en) * | 2016-11-30 | 2017-04-26 | 东北大学 | Device and method for nondestructive testing of sulfide inclusions in steel |
| CN109128122A (en) * | 2018-10-22 | 2019-01-04 | 东北大学 | A kind of channel-type induction heating ladle device and heating means |
| CN109207675B (en) * | 2018-10-22 | 2019-09-27 | 东北大学 | A kind of channel-type induction heating single tube RH purifier and method |
| CN110220826B (en) * | 2019-05-28 | 2021-08-31 | 北京首钢股份有限公司 | Simulation test method and system for behavior of inclusions in molten steel |
| CN110423862B (en) * | 2019-09-12 | 2021-07-09 | 东北大学 | Double-pipe type electromagnetic stirring RH device and method |
| CN110918961B (en) * | 2019-12-24 | 2021-10-29 | 重庆大学 | Induction heating channel and tundish beneficial to removing inclusions in molten steel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1181211C (en) * | 2001-08-30 | 2004-12-22 | 宝山钢铁股份有限公司 | Vacuum deaeration refining process and equipment |
| CN1718759A (en) * | 2005-07-27 | 2006-01-11 | 东北大学 | Improved circulation type molten steel vacuum refining method and device |
| CN201214672Y (en) * | 2008-07-03 | 2009-04-01 | 山西太钢不锈钢股份有限公司 | Single nozzle refining furnace |
| CN201704354U (en) * | 2010-06-10 | 2011-01-12 | 上海东震冶金工程技术有限公司 | Single-pipe heating circulating degassing device |
| CN105149560A (en) * | 2015-10-23 | 2015-12-16 | 东北大学 | Tundish induction heating device having function of removing occluded foreign substances |
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Granted publication date: 20180529 |