CN108127090B - Molten steel alloying device for protecting tapping process and electric furnace steelmaking system with same - Google Patents
Molten steel alloying device for protecting tapping process and electric furnace steelmaking system with same Download PDFInfo
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- CN108127090B CN108127090B CN201710111610.2A CN201710111610A CN108127090B CN 108127090 B CN108127090 B CN 108127090B CN 201710111610 A CN201710111610 A CN 201710111610A CN 108127090 B CN108127090 B CN 108127090B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 397
- 239000010959 steel Substances 0.000 title claims abstract description 397
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 212
- 238000000034 method Methods 0.000 title claims abstract description 73
- 230000008569 process Effects 0.000 title claims abstract description 69
- 238000005275 alloying Methods 0.000 title claims abstract description 63
- 238000009628 steelmaking Methods 0.000 title claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 79
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 63
- 230000001105 regulatory effect Effects 0.000 claims abstract description 39
- 230000001276 controlling effect Effects 0.000 claims abstract description 31
- 230000001681 protective effect Effects 0.000 claims description 39
- 230000007246 mechanism Effects 0.000 claims description 36
- 239000011819 refractory material Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 238000009847 ladle furnace Methods 0.000 claims 1
- 230000002829 reductive effect Effects 0.000 abstract description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 34
- 239000007789 gas Substances 0.000 abstract description 27
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 17
- 239000001257 hydrogen Substances 0.000 abstract description 12
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000009827 uniform distribution Methods 0.000 abstract description 8
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 7
- 238000001179 sorption measurement Methods 0.000 abstract description 6
- 230000033228 biological regulation Effects 0.000 abstract description 5
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- 230000000670 limiting effect Effects 0.000 description 18
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 14
- 239000000945 filler Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 229910052786 argon Inorganic materials 0.000 description 7
- 239000011800 void material Substances 0.000 description 7
- 238000003723 Smelting Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 239000012774 insulation material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 150000004767 nitrides Chemical class 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000009991 scouring Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 3
- 238000009749 continuous casting Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
The application discloses a molten steel alloying device for protecting steel tapping process and an electric furnace steelmaking system with the device, and belongs to the technical field of ferrous metallurgy steelmaking. The steel ladle car comprises a protection pipe regulating and controlling unit, a feeder regulating and controlling unit and a steel ladle tank; the steel tapping protection pipe is arranged on the protection pipe regulating and controlling unit, the protection pipe regulating and controlling unit is used for regulating and controlling the position of the steel tapping protection pipe, and the steel tapping protection pipe is used for protecting molten steel in the steel tapping process; the alloy feeder is installed on feeder regulation and control unit, and feeder regulation and control unit is used for regulating and controlling the position of alloy feeder. The steel tapping protection pipe establishes a relatively closed molten steel channel, so that the gas flow on the surface of molten steel is limited, alloy materials are added into a steel ladle for alloying, the adsorption quantity of the molten steel to harmful gases such as nitrogen and hydrogen in the steel tapping and alloying processes is reduced, the flow of the molten steel promotes the uniform distribution of alloy elements in the molten steel, and the quality of the alloy steel is improved.
Description
Technical Field
The application relates to the technical field of ferrous metallurgy steelmaking, in particular to a molten steel alloying device for protecting a steel tapping process and an electric furnace steelmaking system with the device.
Background
The control of oxygen, nitrogen, hydrogen and temperature in steel is very strict by the external refining and continuous casting process after molten steel is smelted and tapped by an electric furnace. However, during the tapping process, the molten steel is directly contacted with air, so that a large amount of harmful gases such as nitrogen and hydrogen enter the molten steel, nitrogen is a harmful element in common steel types, and during the tapping process, the exposed molten steel is directly contacted with air, so that the nitrogen content in the molten steel is increased, and the nitrogen content is increased by 10-20ppm generally. Because the air contains a certain humidity, the hydrogen of the molten steel can be increased, white spots are easily generated in the steel by the hydrogen, and hydrogen induced cracks are generated in the steel; the quality of the product is reduced. In addition, particularly when alloy materials are added into a ladle for deoxidization alloying after tapping of molten steel, partial alloy elements (such as Al, nb, V, ti) are easy to combine with N elements in the molten steel to form nitride or carbo-nitride, so that the performance of the steel is seriously deteriorated, the pressure is brought to the subsequent external refining and continuous casting, the production cost is greatly increased, and the quality of the alloyed molten steel is reduced. Aiming at the existing steel tapping and alloying processes of molten steel, the protection of molten steel in the tapping and alloying processes is developed, and the quality of the alloyed molten steel is improved.
In addition, the influence on the temperature is very large, the process lasts for about 4-6 minutes, and the temperature of molten steel is reduced due to heat radiation, convection heat dissipation, deoxidization alloying, heat absorption of a ladle lining and the like in the tapping process. Therefore, alloy heating, ladle baking, optimal scheduling and the like are adopted in production, and the temperature drop in the tapping process is reduced. However, no measures are taken for radiation heat dissipation and convection heat dissipation generated between molten steel and air, so that the heat dissipation of the molten steel is serious, and the temperature drop of the molten steel is difficult to effectively control.
It has been found by search that during continuous casting, molten steel has been protected by a protection tube, such as: the name of the application is: composite molten steel protective sleeve (patent number: ZL99229239.5, application date: 1999-08-20), the name of the application is: a nitrogen increase prevention protective tube for molten steel pouring (patent application number: ZL201520734792.5, application date: 2015-09-22). However, such a protective tube is difficult to protect the molten steel during tapping.
In addition, the application is named as follows: a method for preventing nitrogen increase of molten steel in the tapping process of a converter (patent application number: 201010588760.0, application date: 2010-12-15) comprises the steps of controlling argon blowing time and argon flow in the tapping process of the converter before tapping and continuously blowing argon into a ladle in two sections until tapping is finished. Thereby the air in the ladle is discharged by the blown argon, the molten steel in the ladle is prevented from contacting with the air after tapping, the molten steel in the ladle is always in an argon protection state, the nitrogen increase caused by the contact of the molten steel with the air is prevented, and the [ N ] which is extremely easy to be adsorbed on the surface of the bubble in the molten steel can be removed along with the upward floating discharge of the argon bubble. Although the method can prevent nitrogen increase of molten steel to a certain extent, alloying is difficult to realize in the process of protecting tapping, and the alloying element and nitrogen element still easily form nitride or carbon-nitrogen compound in the tapping process.
Disclosure of Invention
1. Technical problem to be solved by the application
The application aims to solve the problem of molten steel quality reduction after molten steel tapping and alloying in the prior art, and provides a molten steel alloying device and an electric furnace steelmaking system with the same in the process of protecting tapping;
the steel tapping protection pipe and the alloy feeder are arranged on the ladle car, the steel tapping protection pipe can protect molten steel in the steel tapping process, the alloy feeder can carry out alloying, the adsorption quantity of the molten steel to harmful gases such as nitrogen and hydrogen in the steel tapping and alloying processes is reduced, and the quality of the molten steel can be improved; further, the heat loss of molten steel can be reduced, and the energy consumption of steelmaking can be reduced;
the electric furnace steelmaking system with the molten steel alloying device comprises an electric furnace body and the molten steel alloying device, wherein a steel tapping protection pipe can protect molten steel in the steel tapping process, an alloy feeder can conduct alloying, the adsorption quantity of the molten steel to harmful gases such as nitrogen and hydrogen in the steel tapping and alloying processes is reduced, and the quality of the molten steel can be improved; further, the heat loss of molten steel can be reduced, and the steelmaking energy consumption can be reduced.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the application is as follows:
the application relates to a molten steel alloying device in a protection tapping process, which comprises a ladle car, a tapping protection pipe and an alloy feeder, wherein the ladle car comprises a protection pipe regulation and control unit, a feeder regulation and control unit and a ladle tank; the steel tapping protection pipe is arranged on the protection pipe regulating and controlling unit, the protection pipe regulating and controlling unit is used for regulating and controlling the position of the steel tapping protection pipe, and the steel tapping protection pipe is used for protecting molten steel in the tapping process; the alloy feeder is arranged on the feeder regulating and controlling unit, the feeder regulating and controlling unit is used for regulating and controlling the position of the alloy feeder, and the alloy feeder is used for adding alloy materials into the ladle.
Preferably, the tapping protection tube comprises a protection sleeve and a connecting sleeve, and the connecting sleeve is used for being connected with the tapping hole; the sleeve inlet end of the protective sleeve is connected with the connecting sleeve and forms a through steel tapping protective tube, the inner diameter of the protective sleeve is larger than the diameter of the steel tapping hole, and a gap is reserved between the molten steel and the inner wall of the protective sleeve when the molten steel flows through the protective sleeve.
Preferably, the protection tube regulating and controlling unit and the feeder regulating and controlling unit have the same structure and comprise a vertical telescopic mechanism, a horizontal telescopic mechanism and a rotating mechanism, wherein the vertical telescopic mechanism is fixedly arranged on the buggy ladle, and the horizontal telescopic mechanism is rotatably arranged on the upper part of the vertical telescopic mechanism through the rotating mechanism.
Preferably, the alloy feeder is arranged obliquely, and the alloy feeder is used for feeding the alloy into the lower part of the steel tapping protection tube.
Preferably, a ladle cover is arranged on the ladle, an alloy material port matched with the alloy feeder is arranged on the ladle cover, and a molten steel inlet matched with the steel tapping protection pipe is also arranged on the ladle cover.
Preferably, the protection sleeve is a conical tube, and the inner diameter of the sleeve inlet end of the protection sleeve is smaller than the inner diameter of the sleeve outlet end, and the inner diameter of the sleeve inlet end is larger than the diameter of the tap hole.
Preferably, the wall of the protective sleeve is sequentially provided with the shell, the heat insulation layer and the refractory material layer from outside to inside.
Preferably, the connecting sleeve is internally provided with a containing cavity, and the containing cavity is used for being sleeved outside the tapping hole.
Preferably, the top of the connecting sleeve is provided with a fitting member comprising a guiding section for guiding the connecting sleeve into engagement with the tap hole and a vertical section for positioning engagement of the tap hole with the vertical section.
The application relates to an electric furnace steelmaking system with a molten steel alloying device, which comprises an electric furnace body and the molten steel alloying device, wherein the electric furnace body is provided with a steel tapping hole, the molten steel alloying device is the molten steel alloying device, a steel tapping protection pipe of the molten steel alloying device is matched with the steel tapping hole, the electric furnace protects molten steel in the steel tapping process, and molten steel alloying is carried out in a ladle.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the application has the following remarkable effects:
(1) According to the molten steel alloying device in the steel tapping protection process, the steel tapping protection pipe is arranged on the ladle car, the steel tapping protection pipe is matched with the steel tapping hole during steel tapping, a relatively closed molten steel channel is established by the steel tapping protection pipe, molten steel flows into the steel tapping protection pipe from the steel tapping hole, the gas flow on the surface of the molten steel is effectively limited, the diffusion of harmful gas in air into the molten steel is limited, after the molten steel enters the ladle, an alloy feeder adds alloy materials into the ladle for alloying, the adsorption quantity of the molten steel to harmful gas such as nitrogen and hydrogen in the steel tapping and alloying processes is reduced, the flow of the molten steel promotes the uniform distribution of alloy elements in the molten steel, and the quality of the alloy steel is improved;
(2) According to the molten steel alloying device for protecting the steel in the tapping process, the inner diameter of the protective sleeve of the tapping protective tube is larger than the diameter of the tapping hole, so that a gap is formed between the molten steel and the inner wall of the protective sleeve when the molten steel flows through the protective sleeve, a good heat-insulating gap layer is formed between the molten steel and the inner wall of the protective sleeve in the tapping process, a good heat-insulating effect is achieved on the molten steel, the heat loss of the molten steel is reduced, direct scouring of the molten steel to the inner wall of the protective sleeve is avoided, and the service life is greatly prolonged;
(3) According to the molten steel alloying device for protecting the steel tapping process, the alloy feeder is obliquely arranged, the alloy feeder is used for adding alloy materials into the lower part of the steel tapping protecting pipe, molten steel flowing out of the steel tapping protecting pipe can stir the alloy materials, the alloy materials added into the ladle tank are rapidly dispersed in the molten steel under the impact of the molten steel, and the rapid flow and impact of the molten steel promote the uniform distribution of alloy elements in the molten steel, so that the quality of the alloy steel is improved;
(4) According to the molten steel alloying device in the steel tapping protection process, the ladle cover is arranged on the ladle, the alloy material opening matched with the alloy feeder is arranged on the ladle cover, the molten steel inlet matched with the steel tapping protection pipe is also arranged on the ladle cover, the ladle cover protects molten steel entering the ladle, the gas flow in the ladle is reduced, the adsorption of harmful gas in alloying of the molten steel is weakened, and the quality of the molten steel is further improved;
(5) According to the molten steel alloying device in the steel tapping process, the shell, the heat insulation layer and the refractory material layer are sequentially arranged on the pipe wall of the protection sleeve from outside to inside, the heat insulation material of the heat insulation layer can effectively limit the heat of molten steel in the protection sleeve to radiate to the outside of the protection sleeve, the temperature loss in the steel tapping process is reduced, the steel tapping temperature is further reduced, and the steel-making energy consumption is saved;
(6) According to the molten steel alloying device for protecting the tapping process, the accommodating groove is formed in the connecting bottom plate and is arranged at the circumferential edge of the connecting bottom plate, when the tapping hole filler is splashed from the tapping hole pipeline, the tapping hole filler is sprayed into the accommodating groove of the connecting bottom plate, so that the mass of the tapping hole filler falling into the ladle can is reduced, the influence of the tapping hole filler on the molten steel mass can be avoided, and the smelting quality of molten steel is improved;
(7) According to the molten steel alloying device in the steel tapping protection process, the limiting plate is arranged at the lower part of the assembling component of the connecting sleeve, so that convection of gas on the surface of molten steel is limited, the severe flow of the gas in the protecting sleeve is restrained, further, the diffusion of harmful gas in air into the molten steel is limited, the heat loss of the molten steel is effectively reduced, and the temperature drop of the molten steel generated in the steel tapping process is reduced;
(8) According to the electric furnace steelmaking system with the molten steel alloying device, the steel tapping hole is arranged on the electric furnace body, the steel tapping protection pipe is regulated and controlled by the protection pipe regulating and controlling unit to be matched with the steel tapping hole, a relatively closed molten steel channel is established by the steel tapping protection pipe, molten steel flows into the steel tapping protection pipe from the steel tapping hole, the diffusion of harmful gas in air into the molten steel is limited, after the molten steel enters a ladle, an alloy feeder is used for alloying an alloy material into the ladle, the adsorption quantity of the molten steel to harmful gas such as nitrogen and hydrogen in the steel tapping and alloying processes is reduced, the flow of the molten steel promotes the uniform distribution of alloy elements in the molten steel, and the quality of alloy steel smelted by the electric furnace is improved.
Drawings
FIG. 1 is a schematic view of the structure of a steel tapping protection tube of the present application;
FIG. 2 is a schematic structural view of a steel tapping protection tube protection sleeve of the present application;
FIG. 3 is a schematic view of the structure of the accommodating recess of the present application;
fig. 4 is a schematic cross-sectional view of the steel tapping protection tube with the fitting member of the present application;
FIG. 5 is a schematic view showing the overall structure of a molten steel alloying device during the steel tapping process according to the present application;
FIG. 6 is a schematic overall structure of embodiment 7 of the present application;
FIG. 7 is a schematic view of the ladle cover of the present application;
FIG. 8 is a schematic structural view of an electric steelmaking system with a molten steel alloying apparatus according to the present application;
fig. 9 is a schematic structural view of embodiment 10 of the present application;
fig. 10 is a schematic view of the embodiment 10 of the present application during tapping.
Reference numerals in the schematic drawings illustrate:
100. a protective sleeve; 101. a refractory material layer; 102. a thermal insulation layer; 103. a void layer; 104. a housing; 110. a cannula inlet end; 120. an outlet end of the sleeve;
200. a connection sleeve; 210. a receiving chamber; 220. a connecting bottom plate; 221. an accommodating groove; 222. a groove inclined surface; 230. a fitting member; 231. a guide section; 232. a vertical section; 240. a limiting plate; 241. limiting through holes;
300. a ladle car; 310. a transport vehicle floor; 321. a protection tube regulating unit; 322. a feeder regulation unit; 301. a vertical telescoping mechanism; 302. a horizontal telescoping mechanism; 303. a rotation mechanism; 304. a clamping member; 330. a ladle tank; 331. a ladle cover; 332. a molten steel inlet; 333. an inlet cover; 334. a hinge; 335. an alloy port; 336. sealing the material port;
400. an electric furnace body; 410. discharging a steel box from the electric furnace; 411. a steel tapping hole; 420. eccentric furnace bottom; 430. a tilting mechanism;
500. an alloy feeder; 510. a charging bin; 520. a feeding pipeline.
Detailed Description
The following detailed description of exemplary embodiments of the application refers to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration exemplary embodiments in which the application may be practiced. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the application, it is to be understood that other embodiments may be realized and that various changes to the application may be made without departing from the spirit and scope of the application. The following more detailed description of the embodiments of the application is not intended to limit the scope of the application, as claimed, but is merely illustrative and not limiting of the application's features and characteristics in order to set forth the best mode of carrying out the application and to sufficiently enable those skilled in the art to practice the application. Accordingly, the scope of the application is limited only by the attached claims.
The following detailed description and example embodiments of the application may be better understood when read in conjunction with the accompanying drawings, in which elements and features of the application are identified by reference numerals.
Example 1
Referring to fig. 1 and 5, the molten steel alloying device in the tapping protection process of the present application comprises a ladle car 300, a tapping protection pipe and an alloy feeder 500, wherein the ladle car 300 comprises a transport vehicle bottom plate 310, a protection pipe regulating and controlling unit 321 and a ladle pot 330 (as shown in fig. 5); wheels are arranged on the transport vehicle bottom plate 310, so that the ladle car 300 can move conveniently; the ladle tank 330 is fixedly arranged on the bottom plate 310 of the transport vehicle, and the opening of the ladle tank 330 is upward;
the protection pipe regulating unit 321 and the feeder regulating unit 322 of this embodiment have the same structure, and comprise a vertical telescopic mechanism 301, a horizontal telescopic mechanism 302 and a rotating mechanism 303, wherein the vertical telescopic mechanism 301 is fixedly installed on a transport vehicle bottom plate 310 of a buggy ladle 300, the horizontal telescopic mechanism 302 is rotatably installed on the upper part of the vertical telescopic mechanism 301 through the rotating mechanism 303, under the action of the rotating mechanism 303, the horizontal telescopic mechanism 302 can rotate by taking the vertical telescopic mechanism 301 as a center, and the end part, far away from the vertical telescopic mechanism 301, of the horizontal telescopic mechanism 302 is provided with a clamping part 304, and the clamping part 304 is used for clamping a steel tapping protection pipe. The protection pipe regulating unit 321 and the feeder regulating unit 322 are respectively arranged at two sides of the ladle tank 330, namely, the bottoms of the protection pipe regulating unit 321 and the feeder regulating unit 322 are fixed on the transport vehicle bottom plate 310;
the steel tapping protection pipe is arranged on the protection pipe regulating and controlling unit 321, the protection pipe regulating and controlling unit 321 is used for regulating and controlling the position of the steel tapping protection pipe, and the steel tapping protection pipe is used for protecting molten steel in the steel tapping process; the alloy feeder 500 is mounted on the feeder adjusting and controlling unit 322, the feeder adjusting and controlling unit 322 is used for adjusting and controlling the position of the alloy feeder 500, the alloy feeder 500 is used for adding alloy materials into the ladle tank 330, the alloy feeder 500 comprises a feeding bin 510 and a feeding pipeline 520, the feeding bin 510 is arranged on the upper portion of the feeding pipeline 520, the alloy materials are added into the feeding bin 510, and the alloy materials can be added into molten steel through the feeding pipeline 520 and alloyed with the molten steel.
Referring to fig. 1, the steel tapping protection tube comprises a protection sleeve 100 and a connection sleeve 200, wherein the inner diameter of the protection sleeve 100 is larger than the diameter of a steel tapping hole 411, so that a gap is formed between the steel water flowing through the protection sleeve 100 and the inner wall of the protection sleeve 100; the connecting sleeve 200 is used for being connected with the steel-tapping hole 411, and a containing cavity 210 is formed in the connecting sleeve 200, and the containing cavity 210 is used for being sleeved outside the steel-tapping hole 411. Moreover, the receiving cavity 210 is a cylindrical cavity having an inner diameter greater than the inner diameter of the cannula inlet end 110.
The sleeve inlet end 110 of the protection sleeve 100 of the present embodiment is connected to the connection sleeve 200 and forms a through steel-tapping protection tube, and when the connection sleeve 200 is sleeved outside the steel-tapping hole 411, the protection sleeve 100 and the steel-tapping hole 411 are kept coaxial, that is, the axis of the protection sleeve 100 and the axis of the steel-tapping hole 411 are on the same straight line. After the steel-tapping hole 411 is opened, molten steel flows from the steel-tapping hole 411 to the protection sleeve 100 through the connecting sleeve 200, the inner diameter of the protection sleeve 100 is larger than the diameter of the steel-tapping hole 411, and a gap is reserved between the molten steel and the inner wall of the protection sleeve 100 when the molten steel flows through the protection sleeve 100, so that the molten steel is not contacted with the inner wall of the protection sleeve 100 or the molten steel is not completely contacted with the inner wall of the protection sleeve 100, thereby reducing scouring of the molten steel to the inner wall of the protection sleeve 100 and prolonging the service life.
Under the guidance of the inertia thinking of the prior art, the prior art usually thinks that the prior art does not need to protect in the tapping process, and even if the protection in the tapping process is concerned, the protection of the molten steel in the tapping process by adopting the tapping protection tube is difficult to imagine, so that the tapping protection tube in the tapping process provided by the application breaks the technical prejudice of the prior art and has remarkable progress. In the next step, even if the technician pays attention to the protection of the molten steel during the tapping process, in order to improve the protection effect during the tapping process and prevent the contact of the molten steel with air, the conventional technician often sets the protection sleeve 100 and the tap hole 411 to have equal diameters, so that the generation of a gap between the molten steel in the protection sleeve 100 and the inner wall of the protection sleeve 100 is avoided, and the molten steel and the air are necessarily contacted due to the gap, so that the technician in the prior art must set the protection sleeve 100 and the tap hole 411 to have equal diameters for obtaining a better protection effect; however, such design greatly reduces the service life of the protection sleeve 100, and not only does not achieve a good protection effect, but also increases the production cost. The application creatively proposes that the inner diameter of the protective sleeve 100 is larger than the diameter of the steel tapping hole 411, so that a gap is reserved between the molten steel and the inner wall of the protective sleeve 100 when the molten steel flows through the protective sleeve 100, and the molten steel is prevented from directly scouring the inner wall of the protective sleeve 100 in the tapping process, so that the service life is greatly prolonged. Meanwhile, the gaps between the molten steel and the inner wall of the protective sleeve 100 form good heat-insulating gaps, which have good heat-insulating effect and reduce heat loss of the molten steel.
The protection sleeve 100 is a tapered tube, and the inner diameter of the sleeve inlet end 110 of the protection sleeve 100 is smaller than the inner diameter of the sleeve outlet end 120 (as shown in fig. 1), and the inner diameter of the sleeve inlet end 110 is larger than the diameter of the tap hole 411; the diameter of the tap hole 411 in this embodiment is 1.5 times the inner diameter of the sleeve inlet end 110; the sleeve outlet end 120 has an inner diameter of 3.0 times the diameter of the tap hole 411. The inner diameter of the sleeve inlet end 110 is smaller than that of the sleeve outlet end 120, so that air convection is effectively limited, air is prevented from flowing vigorously in the protective sleeve 100, a relatively closed molten steel channel is established by the steel tapping protective tube, gas flow on the surface of molten steel is effectively limited, and accordingly diffusion of harmful gases in the air into the molten steel is limited, nitrogen and hydrogen and other harmful gases adsorbed by the molten steel are greatly reduced, and under the condition of small air convection, only the air in the protective sleeve 100 does not affect the quality of the molten steel. And the flow of the molten steel promotes the uniform distribution of the alloy elements in the molten steel, improves the quality of the alloy steel, ensures the rapid uniform distribution of the alloy elements in the molten steel, and further improves the quality of the molten steel. And the alloy element (such as Al, nb, V, ti) is reduced to be combined with N element in molten steel to form nitride or carbon nitrogen compound as much as possible, so that the quality of the molten steel after alloying is improved.
Meanwhile, the molten steel is exposed to the air in the steel-making process, so that the molten steel generates larger temperature drop in the steel-making process due to heat radiation and convection heat dissipation, and the temperature drop of the molten steel in the steel-making process of an electric furnace is even 50-80 ℃ for example. The design of the protective sleeve 100 in this embodiment limits the convective heat transfer of air at the surface of the molten steel and reduces the temperature drop of the molten steel at the protective sleeve 100. After the molten steel flows out of the steel outlet 411, the molten steel can be diffused when flowing into the ladle 330 due to the reduction of the pressure of the molten steel, namely, the diameter of the molten steel is larger than that of the molten steel flowing at the steel outlet 411 when flowing into the ladle 330, and the inner diameter of the sleeve inlet end 110 is smaller than that of the sleeve outlet end 120, so that the molten steel can still keep a gap with the inner wall of the protective sleeve 100 when flowing to the bottom, the service life of the protective sleeve 100 is prolonged, and a gap heat-insulating layer with good heat-insulating effect is formed, so that the method has remarkable progress.
Example 2
The basic content of this embodiment is the same as embodiment 1, except that: the wall of the protective sleeve 100 is provided with a shell 104, a heat insulating layer 102 and a refractory material layer 101 (shown in fig. 2) from outside to inside in sequence; the shell 104 is made of a steel structure with high mechanical strength, and the heat insulation layer 102 is made of a heat insulation material, wherein the heat insulation material is glass fiber, asbestos, rock wool or silicate, or a combination of the above; the heat insulation material of the heat insulation layer 102 can effectively limit the heat of the molten steel in the protective sleeve 100 to radiate to the outside of the protective sleeve 100, so that the temperature loss in the tapping process is reduced, the tapping temperature can be further reduced, and the steelmaking energy consumption is saved. The refractory material layer 101 is arranged on the inner wall of the protective sleeve 100, and the refractory material layer 101 is made of refractory material, so that the erosion and corrosion of molten steel can be effectively resisted. The insulating layer 102 is disposed between the outer shell 104 and the refractory layer 101.
Example 3
The basic content of this embodiment is the same as embodiment 2, except that: a void layer 103 (as shown in fig. 2) is further disposed between the housing 104 and the insulating layer 102, that is, a void is disposed between the housing 104 and the insulating layer 102, and the void layer 103 is formed, where the void layer 103 may be a vacuum condition or may be a void layer 103 filled with any gas, and in this embodiment, the void layer 103 is filled with air. The gap layer 103 between the outer shell 104 and the heat insulating layer 102 changes the heat transfer condition of the protection sleeve 100, thereby limiting the heat transfer of the molten steel in the protection sleeve 100 to the outside and reducing the heat loss in the molten steel tapping process.
Example 4
The basic content of this embodiment is the same as embodiment 1, except that: the connection sleeve 200 is connected with the sleeve inlet end 110 through the connection bottom plate 220 at the bottom, through holes are arranged on the connection bottom plate 220, the through holes are correspondingly arranged with the sleeve inlet end 110, the accommodating cavity 210 of the connection sleeve 200 is communicated with the protection sleeve 100 through the through holes, so that molten steel can flow into the protection sleeve 100 from the tapping hole 411 through the accommodating cavity 210, and the protection effect on the molten steel is realized. The connection base 220 is provided with a receiving groove 221, and the receiving groove 221 is provided at a circumferential edge position of the connection base 220 (as shown in fig. 3).
Before tapping, the electric furnace is used for preventing molten steel from directly flowing to the supporting plate to erode the supporting plate, and filling materials are filled in the pipe of the tapping hole 411 at the upper part of the supporting plate, wherein the filling materials are arranged between the supporting plate and the molten steel, but after the supporting plate is pulled out from a pipe of the tapping hole 411, the molten steel can extrude and splash the filling materials from the tapping hole 411 under the gravity action of the molten steel, and finally the splashed filling materials fall into the ladle pot 330 and are then melted in high-temperature molten steel. However, as the filler contains a large amount of impurities, the filler melted into the high-temperature molten steel can cause harmful elements to enter the molten steel, so that the performance of the steel is deteriorated, and pressure is brought to the subsequent external refining; therefore, for the steelmaking process of the electric furnace, a steel tapping protection pipe for steelmaking tapping of the electric furnace is designed, the connecting bottom plate 220 is provided with the accommodating groove 221, the accommodating groove 221 is arranged at the circumferential edge position of the connecting bottom plate 220, when the filler is splashed out of the steel tapping hole 411 pipeline, the spraying state of the filler is radial, and the filler is sprayed in the accommodating groove 221 of the connecting bottom plate 220, so that part of the filler cannot fall into the ladle tank 330, the influence of the filler on the quality of molten steel is reduced, the smelting quality of molten steel is improved, the smelting cost is reduced, and the remarkable progress is achieved.
Example 5
The basic content of this embodiment is the same as embodiment 4, except that: the inner side of the accommodating groove 221 is a groove inclined surface 222, the inclined angle of the groove inclined surface 222 is 45 degrees, and the groove inclined surface 222 ensures that the filler is easier to fall into the accommodating groove 221 when the filler is sprayed along a radial direction, so that the filler falls into a ladle is further reduced, the smelting quality of molten steel is further improved, and the smelting cost is reduced.
Example 6
The basic content of this embodiment is the same as embodiment 1, except that: the top of the connecting sleeve 200 is provided with an assembling member 230, the assembling member 230 comprises a guide section 231 and a vertical section 232 (as shown in fig. 4), the guide section 231 has a certain taper, that is, the inner diameter of the top of the guide section 231 is larger than the inner diameter of the bottom of the guide section 231, so that the top of the connecting sleeve 200 is more easily matched with the steel-tapping hole 411, after the top of the guide section 231 is matched with the steel-tapping hole 411, the steel-tapping hole 411 is continuously moved out of the steel-protecting tube, and can be assembled in the vertical section 232 under the action of the guide section 231; the guide section 231 thus serves to guide the connecting sleeve 200 into engagement with the tap hole 411 and to position the tap hole 411 into engagement with the vertical section 232. The lower part of the vertical section 232 is provided with a limiting plate 240, the center of the limiting plate 240 is provided with a limiting through hole 241, and the inner diameter of the limiting through hole 241 is between the inner diameter and the outer diameter of the steel-tapping hole 411, namely the inner diameter of the steel-tapping hole 411 is smaller than the inner diameter of the limiting through hole 241 is smaller than the outer diameter of the steel-tapping hole 411; so that the limiting plate 240 can limit the lower limit of the tap hole 411 and ensure normal tapping.
The steel tapping hole 411 is matched with a limiting through hole 241 in the center of the limiting plate 240, molten steel flows out from the steel tapping hole 411, and the molten steel flows into the protective sleeve 100 through the center of the limiting plate 240; the limiting plate 240 is used for limiting the downward movement of the steel outlet 411, so that the steel outlet 411 is prevented from being installed into the connecting sleeve 200 too deeply in the assembling process, the assembling efficiency is improved, and the connecting sleeve 200 is prevented from being collided with the steel outlet 411 to be damaged.
Meanwhile, during tapping of molten steel, molten steel flows from the tap hole 411 to the protection sleeve 100, and the surface of molten steel drives air to flow due to a gap between the molten steel and the receiving cavity 210 in the protection sleeve 100 and the connection sleeve 200, and the gas is caused to flow convectively on the surface of molten steel. The limiting plate 240 divides the space of the accommodating cavity 210 in the connecting sleeve 200 into 2 independent spaces while limiting, so that the convection of gas on the surface of molten steel is limited, the severe flow of the gas in the protecting sleeve 100 is inhibited, and the diffusion of harmful gas in the air into the molten steel is further limited; at the same time, the convective heat transfer of air on the surface of molten steel is also limited, the temperature drop of molten steel in the protective sleeve 100 is reduced, and the temperature drop in the tapping process is reduced.
Example 7
The basic content of this embodiment is the same as embodiment 1, except that: the ladle 330 is provided with a ladle cover 331, the ladle cover 331 is provided with an alloy port 335 matched with the alloy feeder 500, and the ladle cover 331 is also provided with a molten steel inlet 332 matched with a tapping protection tube (as shown in fig. 6).
The ladle cover 331 is provided with a molten steel inlet 332, and the molten steel inlet 332 is matched with the tapping protection tube; the molten steel inlet 332 is provided with an inlet cover 333 (shown in FIG. 7) that fits into the molten steel inlet. In the tapping process, the inlet closing cover 333 is opened first, and then the tapping protection pipe is inserted into the ladle tank 330, so that the whole process of protecting molten steel when the molten steel flows from the tapping hole 411 to the ladle tank 330 is realized, the molten steel is prevented from contacting with air in the ladle tank 330, and impurities in the molten steel are further reduced. And the outward heat dissipation of molten steel in the tapping process is avoided, and the heat loss in the tapping process is reduced. The inlet cover 333 is used for closing the molten steel inlet 332 after tapping, thereby preventing the molten steel from radiating outwards from the molten steel inlet 332, the inlet cover 333 is rotatably connected with the ladle cover 331 through the hinge 334, and the inlet cover 333 can rotate around the hinge 334 as an axis.
The ladle cover 331 is provided with an alloy port 335, and the alloy port 335 is matched with the alloy feeder 500, that is, a feeding pipeline 520 of the alloy feeder 500 can pass through the ladle cover 331 from the alloy port 335 and be inserted into the ladle pot 330. The alloy material hole 335 is provided with a material hole cover 336 matched with the alloy material hole, the material hole cover 336 is rotationally connected with the ladle cover 331 through a hinge 334, and the material hole cover 336 can rotate by taking the hinge 334 as an axis. After the alloy is added to the alloy feeder 500, the port cover 336 can be closed to prevent air from entering the ladle vessel 330 through the port cover 336, thereby preventing the molten steel from adsorbing harmful gases in the ladle vessel 330. After the ladle tank 330 is capped, argon can be blown into the ladle tank 330 at the same time, so that the ladle tank 330 is in a positive pressure state, and further, air is prevented from diffusing into the ladle tank 330.
Example 8
The basic content of this embodiment is the same as embodiment 1, except that: the alloy feeder 500 is arranged obliquely, and the alloy feeder 500 is used for adding alloy into the lower part of the steel tapping protection tube, and is specifically described: the charging pipe 520 of the alloy charger 500 extends to the lower portion of the sleeve outlet end 120 of the steel tapping protection tube, the alloy charger 500 adds alloy into the ladle tank 330, molten steel flowing out of the steel tapping protection tube can stir the alloy, the alloy added into the ladle tank 330 is rapidly dispersed in molten steel under the impact of the molten steel, the rapid flow and impact of the molten steel promote the uniform distribution of alloy elements in the molten steel, and the quality of the alloy steel is further improved.
Example 9
The application relates to an electric furnace steelmaking system with a molten steel alloying device, which comprises an electric furnace body 400 and the molten steel alloying device, wherein the electric furnace body 400 is provided with a steel outlet 411, the molten steel alloying device is the molten steel alloying device, a steel outlet protection pipe of the molten steel alloying device is matched with the steel outlet 411, the electric furnace protects molten steel in the steel outlet process and performs molten steel alloying in a ladle tank 330, the flow and stirring of the molten steel promote the uniform distribution of alloy elements in the molten steel, and the quality of alloy steel is improved.
The electric furnace body 400 comprises an electric furnace steel outlet box 410, an eccentric furnace bottom 420 and a tilting mechanism 430, wherein a steel outlet 411 is arranged on the electric furnace steel outlet box 410, the tilting mechanism 430 is driven in the steel outlet process, the electric furnace body 400 tilts under the action of the eccentric furnace bottom 420 and drives the electric furnace steel outlet box 410 to tilt at the same time, so that molten steel flows into the electric furnace steel outlet box 410 from the electric furnace body 400, then a protection tube regulating and controlling unit 321 regulates and controls the position of a steel outlet protection tube, the steel outlet protection tube is centered with the steel outlet 411, and then the vertical telescopic mechanism 301 is driven, so that a connecting sleeve 200 of the steel outlet protection tube is matched with the steel outlet 411; then, the supporting plate of the tapping hole 411 is opened, molten steel flows into the tapping protection pipe from the tapping hole 411, and tapping is performed under the protection of the tapping protection pipe. The steel tapping protection tube is matched with the steel tapping hole 411, a relatively closed molten steel channel is established by the steel tapping protection tube, molten steel flows into the steel tapping protection tube from the steel tapping hole 411, the gas flow on the surface of the molten steel is effectively limited, the diffusion of harmful gas in the air into the molten steel is limited, the combination of alloy elements (such as Al, nb, V, ti) and N elements in the molten steel to form nitride or carbon nitrogen compounds is reduced as much as possible, and the quality of the alloyed molten steel is further improved. And reduces the heat loss of the molten steel. On the basis, the production efficiency of the electric furnace is improved, the smelting time is shortened, and the equipment utilization rate is improved; and the tapping temperature is reduced, so that the erosion degree of molten steel to the electric furnace is reduced, and the service life of electric furnace system equipment is prolonged.
Example 10
The basic contents of an electric furnace steelmaking system with a molten steel alloying device in this embodiment are the same as those in embodiment 9, and the difference is that: the electric furnace body 400 is provided with an electric furnace steel outlet box 410, the lower part of the electric furnace steel outlet box 410 is provided with a steel outlet 411, the included angle between the steel outlet 411 and the vertical direction is epsilon (shown in fig. 9), epsilon is the steel outlet inclination angle of the electric furnace, epsilon is the steel outlet angle in the normal steel outlet process, and epsilon ranges from 10 degrees to 15 degrees, and the preferred range of epsilon is 12 degrees in the embodiment.
The clamping component 304 is installed at the tail end of the horizontal telescopic mechanism 302 through a rotating shaft, and the clamping component 304 can offset or deflect at a small angle relative to the horizontal telescopic mechanism 302 in the vertical direction, so that the clamping component 304 drives the steel tapping protection tube to adaptively offset or deflect in the vertical direction. The adaptive offset makes the steel-tapping protection tube coaxial with the tap hole 411 after the steel-tapping protection tube is matched with the tap hole 411, namely, the axis of the steel-tapping protection tube and the axis of the tap hole 411 are on the same straight line.
In the tapping process, the tilting mechanism 430 is driven in the tapping process, the electric furnace body 400 tilts under the action of the eccentric furnace bottom 420, and simultaneously the electric furnace steel outlet box 410 is driven to tilt, so that molten steel flows into the electric furnace steel outlet box 410 from the electric furnace body 400, and when the tilting angle of the electric furnace body 400 reaches epsilon=12°. The protection tube regulating unit 321 regulates the position of the steel-tapping protection tube, the steel-tapping protection tube is kept vertical (as shown in fig. 10), and after molten steel flows into the steel-tapping protection tube through the steel-tapping hole 411, the molten steel vertically flows out of the steel-tapping protection tube under the action of gravity. And the steel tapping protection tube is coaxial with the steel tapping hole 411, the inner diameter of the protection sleeve 100 of the steel tapping protection tube is larger than the diameter of the steel tapping hole 411, and when molten steel vertically flows through the steel tapping protection tube, the molten steel is not contacted with the inner wall of the protection sleeve 100 or is not completely contacted with the inner wall of the protection sleeve 100, so that the scouring of the molten steel on the inner wall of the protection sleeve 100 is reduced.
In the tapping process, molten steel flows into a tapping protection pipe from a tapping hole 411, and the tapping protection pipe protects the molten steel in the tapping process, so that harmful gases such as nitrogen and hydrogen are adsorbed by the molten steel in the air; and the temperature loss in the tapping process can be effectively reduced, and the energy consumption of steelmaking is reduced.
The application has been described in detail hereinabove with reference to specific exemplary embodiments thereof. It will be understood that various modifications and changes may be made without departing from the scope of the application as defined by the appended claims. The detailed description and drawings are to be regarded in an illustrative rather than a restrictive sense, and if any such modifications and variations are desired to be included within the scope of the application described herein. Furthermore, the background art is intended to illustrate the state of the art and the meaning of the development and is not intended to limit the application or the field of application of the application.
More specifically, although exemplary embodiments of the present application have been described herein, the present application is not limited to these embodiments, but includes any and all embodiments modified, omitted, combined (e.g., between various embodiments), adapted, and/or substituted as would be recognized by those skilled in the art in light of the foregoing detailed description. The limitations in the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the foregoing detailed description or during the prosecution of the application, which examples are to be construed as non-exclusive. For example, in the present application, the term "preferably" is not exclusive, and here it means "preferably, but not limited to". Any steps recited in any method or process claims may be executed in any order and are not limited to the order presented in the claims. The scope of the application should, therefore, be determined only by the appended claims and their legal equivalents, rather than by the descriptions and examples given above.
Claims (7)
1. The utility model provides a molten steel alloying device in protection tapping process which characterized in that: the steel ladle car comprises a steel ladle car (300), a steel tapping protection pipe and an alloy feeder (500), wherein the steel ladle car (300) comprises a protection pipe regulating and controlling unit (321), a feeder regulating and controlling unit (322) and a steel ladle tank (330); the steel tapping protection pipe is arranged on the protection pipe regulating and controlling unit (321), the protection pipe regulating and controlling unit (321) is used for regulating and controlling the position of the steel tapping protection pipe, and the steel tapping protection pipe is used for protecting molten steel in the steel tapping process; the alloy feeder (500) is arranged on the feeder regulating unit (322), the feeder regulating unit (322) is used for regulating the position of the alloy feeder (500), and the alloy feeder (500) is used for feeding alloy into the ladle (330);
the steel tapping protection tube comprises a protection sleeve (100) and a connecting sleeve (200), and the connecting sleeve (200) is used for being connected with the steel tapping hole (411); the sleeve inlet end (110) of the protective sleeve (100) is connected with the connecting sleeve (200) and forms a through steel tapping protective tube, the inner diameter of the protective sleeve (100) is larger than the diameter of the steel tapping hole (411), and a gap is reserved between the molten steel and the inner wall of the protective sleeve (100) when the molten steel flows through the protective sleeve (100); the protection sleeve (100) is a conical tube, the inner diameter of the sleeve inlet end (110) of the protection sleeve (100) is smaller than the inner diameter of the sleeve outlet end (120), and the inner diameter of the sleeve inlet end (110) is larger than the diameter of the steel tapping hole (411);
the alloy feeder (500) is obliquely arranged, and the alloy feeder (500) is used for feeding alloy into the lower part of the steel tapping protection tube.
2. The molten steel alloying device for protecting steel tapping according to claim 1, wherein: the protection tube regulating and controlling unit (321) and the feeder regulating and controlling unit (322) are identical in structure and comprise a vertical telescopic mechanism (301), a horizontal telescopic mechanism (302) and a rotating mechanism (303), wherein the vertical telescopic mechanism (301) is fixedly arranged on the buggy ladle (300), and the horizontal telescopic mechanism (302) is rotatably arranged on the upper portion of the vertical telescopic mechanism (301) through the rotating mechanism (303).
3. The molten steel alloying device for protecting steel tapping according to claim 1, wherein: the ladle tank (330) is provided with a ladle cover (331), the ladle cover (331) is provided with an alloy material port (335) matched with the alloy feeder (500), and the ladle cover (331) is also provided with a molten steel inlet (332) matched with the tapping protection tube.
4. The molten steel alloying device for protecting steel tapping according to claim 1, wherein: the pipe wall of the protection sleeve (100) is sequentially provided with a shell (104), a heat insulation layer (102) and a refractory material layer (101) from outside to inside.
5. The molten steel alloying apparatus for protecting a steel discharge process according to claim 4, wherein: the connecting sleeve (200) is internally provided with a containing cavity (210), and the containing cavity (210) is used for being sleeved outside the steel tapping hole (411).
6. A molten steel alloying device for protecting steel during tapping according to any one of claims 1-5, wherein: the top of the connecting sleeve (200) is provided with a fitting member (230), the fitting member (230) comprises a guide section (231) and a vertical section (232), and the guide section (231) is used for guiding the connecting sleeve (200) to be matched with the steel tapping hole (411) and enabling the steel tapping hole (411) to be matched with the vertical section (232) in a positioning mode.
7. An electric furnace steelmaking system with a molten steel alloying device, which is characterized in that: the steel ladle furnace comprises an electric furnace body (400) and a molten steel alloying device, wherein a steel tapping hole (411) is formed in the electric furnace body (400), the molten steel alloying device is the molten steel alloying device according to any one of claims 1-6, a steel tapping protection pipe of the molten steel alloying device is matched with the steel tapping hole (411), the electric furnace protects molten steel in the steel tapping process, and molten steel alloying is carried out in a ladle (330).
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| CN201710111610.2A CN108127090B (en) | 2017-02-28 | 2017-02-28 | Molten steel alloying device for protecting tapping process and electric furnace steelmaking system with same |
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| CN201710111610.2A CN108127090B (en) | 2017-02-28 | 2017-02-28 | Molten steel alloying device for protecting tapping process and electric furnace steelmaking system with same |
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| CN108127090A (en) | 2018-06-08 |
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