CN110184415A - A kind of ladle refining Yarn feeding device and line feeding method - Google Patents
A kind of ladle refining Yarn feeding device and line feeding method Download PDFInfo
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- CN110184415A CN110184415A CN201910457696.3A CN201910457696A CN110184415A CN 110184415 A CN110184415 A CN 110184415A CN 201910457696 A CN201910457696 A CN 201910457696A CN 110184415 A CN110184415 A CN 110184415A
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- feeding
- impregnating cover
- wire machine
- cantilever
- ladle
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- 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
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
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- 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
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
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- 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 ladle refining Yarn feeding device and line feeding method, it is low to solve the problems, such as that traditional line feeding process alloy wire passes through alloy recovery caused by slag blanket, secondary oxidation and the factors such as vapour pressure is low.The device includes feeding wire machine and line feeding arm；Line feeding arm includes cantilever and impregnating cover；One end of cantilever and the outlet of feeding wire machine connect, and the other end is connect with impregnating cover, and cantilever can move along the vertical and lateral under the braking of feeding wire machine.The present invention can be improved yield of alloy, and process flue dust can be effectively reduced, and reduce environmental pollution.
Description
Technical field
The invention belongs to field of steel metallurgy more particularly to a kind of ladle refining Yarn feeding devices and line feeding method.
Background technique
In steel manufacture process, for guarantee steel various physical and chemical performances, need to add into molten steel various alloying elements with
Ensure the various physical and chemical indexes of steel, is at present universal with the line feeding that metallic iron skin is wrapped in alloy to molten steel addition alloying element
One of alloying technology of use.
Alloy wire is up to 10000kwh or more, belongs to as one of material important in steel production, production process energy consumption
In high energy consumption, improves yield of alloy and be of great significance to the utilization of resources and friendly, green, harmonious development.
Traditional Yarn feeding device, alloy wire have to pass through slag blanket, molten steel are caused to seethe, and secondary oxidation occur, while by low
The restrictive factors such as melting alloy gasification influence, and caused alloying element recovery rate is low, yield of alloy it is low only 10%, it is high
Only 30%；Ladle refining process is stirred with argon bottom-blowing and is refined, and Argon Bubble enters the gas that molten bath not only generates disperse
Bubble, and cause the circulation of molten steel；Therefore, from raising yield of alloy, drop low alloy-consumption and alloy wire and ladle flow field phase
The angle of matched technique provides a kind of Yarn feeding device and method to solving the problems, such as that the developing resource and environment of steel industry has
It is significant.
Summary of the invention
The object of the present invention is to provide a kind of ladle refining Yarn feeding device and methods, solve traditional line feeding process alloy wire
The problem low across alloy recovery caused by the factors such as slag blanket, secondary oxidation be low with vapour pressure, and process can be effectively reduced
Flue dust improves yield of alloy.
Specifically, the device includes feeding wire machine and line feeding arm the present invention provides a kind of ladle refining Yarn feeding device；Hello
Line arm includes cantilever and impregnating cover；One end of cantilever and the outlet of feeding wire machine connect, and the other end is connect with impregnating cover, and cantilever can
It moves along the vertical and lateral under the braking of feeding wire machine.
Further, which further includes cleaner, and cleaner includes sequentially connected metal tube, pumping wind
One end of machine and flue dust collecting device, the cleaner is connect by metal tube with cantilever, and pumping blower will generate in impregnating cover
Flue gas suck flue dust collecting device, flue dust collecting device and external dedusting piping connection.
Further, cantilever is hollow steel casing.
Further, the top of impregnating cover is hollow connecting tube, and connecting tube is detachably connected with cantilever；Under impregnating cover
Portion is hollow conical shell structure, and impregnating cover includes metal shell, thermal insulation layer and inner metal shell from outer to inner.
Further, the conical shell internal height of cone shell is 200-1000mm, the diameter of a circle of the bottom of cone shell
For 200-800mm.
Further, the material of thermal insulation layer is magnesium-based or aluminium base castable.
Further, metal shell with a thickness of 15-25mm, thermal insulation layer with a thickness of 45-55mm, the thickness of inner metal shell
For 10-20mm.
Further, which further includes workbench and ladle；Workbench is for placing feeding wire machine.
In addition, including the following steps: the present invention also provides a kind of ladle refining line feeding method
Step 1: ladle bottom argon bottom-blowing, bottom blowing flow are Q1, stable slag blister is formed in the ladle top of the slag；
Step 2: transverse shifting feeding wire machine moves to impregnating cover right above slag blister, improves argon bottom-blowing flow to Q2；
Step 3: longitudinal movement feeding wire machine immerses impregnating cover at slag blister below molten steel, reduces argon bottom-blowing flow to Q3；
Step 4: impregnating cover is moved to the position of the stream stock decline opposite with slag blister by transverse shifting feeding wire machine；
Step 5: starting Yarn feeding device carries out line feeding；
Step 6: line feeding terminates, and vertically moves feeding wire machine, is promoted above impregnating cover to steel ladle edge；Transverse shifting feeding wire machine,
Impregnating cover is moved away from above ladle.
Further, step 1 to step 5 stage closes pumping blower, and the flue gas that line feeding generates is enclosed in impregnating cover,
Before step 6 impregnating cover is moved away from above ladle starting pumping blower by the flue gas in impregnating cover first after flue dust collecting device dedusting, will
Exhaust gas is discharged into external dedusting pipeline.
Compared with prior art, the present invention is at least able to achieve one of following beneficial effect:
(1) cantilever of Yarn feeding device provided by the invention, impregnating cover and feeding wire machine connect to form hollow channel, alloy wire
It is provided by feeding wire machine, passes through cantilever and impregnating cover, avoid slag blanket, be directly entered molten steel, avoid alloy wire across slag blanket by oxygen
The problem that change or gasification cause yield of alloy low.
(2) Yarn feeding device provided by the invention includes cleaner, the flue dust during line feeding can be made full use of it
After be discharged, can be effectively reduced process flue dust, improve yield of alloy, reduce environmental pollution.
(3) impregnating cover is first put by line feeding method provided by the invention from slag blister, then that impregnating cover moved to slag blister is opposite
Position start line feeding, when reaction around have skull protection, melt tank reaction is violent when avoiding reacting directly at slag blister, reduces steel
Liquid, which acutely seethes, causes secondary oxidation.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is Yarn feeding device overall structure diagram of the invention；
Fig. 2 is the line feeding arm configuration schematic diagram of Yarn feeding device of the invention；
Fig. 3 is the impregnating cover structural schematic diagram of Yarn feeding device of the invention；
Fig. 4 is the main view of the impregnating cover of Yarn feeding device of the invention；
Fig. 5 is the structural schematic diagram of the cantilever of Yarn feeding device of the invention；
Fig. 6 is the main view of the cantilever of Yarn feeding device of the invention；
Fig. 7 is flow field and impregnating cover position main view in line feeding method of the invention；
Fig. 8 is the cross-sectional view of A-A in Fig. 7；
Fig. 9 is the bottom blowing gas pattern diagram in line feeding method of the invention.
In figure: 1- feeding wire machine, 2- workbench, 3- line feeding arm, 3-1- cantilever, 3-2- impregnating cover, 3-2-1- flange, 3-2-
2- connecting tube, 3-3 alloy line passage, 3-4 alloy wire, 4- ladle, 4-1- slag blanket, 4-2 molten steel, 4-3- slag-steel interface, 5- bottom blowing
Brick, 6- slag blister, 7- flow the position of stock decline.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Embodiment 1
A kind of ladle refining Yarn feeding device is present embodiments provided, as shown in figures 1 to 6, comprising: feeding wire machine 1 and line feeding arm
3；Line feeding arm 3 includes cantilever 3-1 and impregnating cover 3-2；One end of cantilever 3-1 is connect by flange with the outlet of feeding wire machine 1, another
End is detachably connected by flange and impregnating cover 3-2, and feeding wire machine 1 is placed on workbench 2；Wheel is provided with below feeding wire machine
Son can move along workbench, lifting platform is provided in feeding wire machine, and line feeding arm 3 can be driven to realize longitudinal movement.
Compared with prior art, the cantilever of Yarn feeding device provided in this embodiment, impregnating cover and feeding wire machine, which connect, to form
The hollow alloy line passage of empty formation, alloy wire are provided by feeding wire machine, pass through cantilever and impregnating cover, avoid slag blanket, directly into
Enter molten steel, avoids alloy wire across slag blanket and be oxidized or gasify the problem for causing yield of alloy low, conjunction can be significantly improved
Golden recovery rate.
Specifically, the Yarn feeding device further includes cleaner, cleaner includes sequentially connected metal tube, pumping blower
It is connect by metal tube with cantilever 3-1 with one end of flue dust collecting device, the cleaner, pumping blower will generate in impregnating cover
Flue gas suck flue dust collecting device, flue dust collecting device and external dedusting piping connection.The flue dust generated in line feeding implementation Process
Amount is smaller, and the flue dust of generation is not expelled directly out, but the flue dust that line feeding process generates is enclosed in impregnating cover, utilizes impregnating cover
Interior flue gas partial pressure, improves line feeding recovery rate of iron；Starting is evacuated blower for impregnating cover before impregnating cover is removed after to line feeding
Interior flue dust is first through flue dust after collector dedusting, then exhaust gas is discharged into external dedusting pipeline, and the setting of cleaner can be with
The flue dust during line feeding can be effectively reduced, improve yield of alloy, avoid exhaust gas direct emission in workshop, it is dirty to reduce environment
Dye.
Meet extension, weight demands that are mobile and bearing impregnating cover, another party in view of cantilever needs certain intensity
Face also needs to meet light-weighted design requirement, and therefore, cantilever uses hollow steel bilayer sleeve, is not lonely each other between casing
It is vertical, but there is gusset to be attached, reinforce the weight that cantilever is reduced while the intensity of two layers of pipe.
It is worth noting that, the structure of impregnating cover 3-2 is as shown in figure 4, the top of impregnating cover 3-2 is hollow connecting tube 3-
2-2, the connecting tube 3-2-2 are detachably connected by flange 3-2-1 and cantilever 3-1；When impregnating cover 3-2 is needed using a period of time
It can directly dismantle and be replaced when replacing, it is convenient and efficient, and save the cost；Specifically, the lower part of impregnating cover 3-2 is hollow
Conical shell structure, it is contemplated that cone shell it is undersized, be unfavorable for impregnating cover collect flue gas, do not open preceding appearance in blower
Easily lead to flue gas evolution；Oversized, one side weight increases, and is unfavorable for operating, and increases cantilever burden, and line feeding process
In without fume treatment be flue gas partial pressure in impregnating cover to be utilized, improve line feeding recovery rate of iron, impregnating cover size is larger
It is easy to cause flue gas partial pressure low, is unfavorable for improving line feeding recovery rate.It is preferred, therefore, that the conical shell inner height of cone shell is
200-1000mm, the diameter of a circle of the bottom of cone shell are 200-800mm.
Specifically, improving the impregnating cover service life to improve the erosiveness resistant to high temperatures of impregnating cover 3-2, impregnating cover 3-2 is outside
And interior includes metal shell, thermal insulation layer and inner metal shell three-decker；In order to guarantee not pollute molten steel, the material and steel of thermal insulation layer
Bao Naicai is consistent, such as low-carbon magnesium oxide, middle magnesium oxycarbide, high-carbon magnesia, low-carbon aluminium oxide, middle oxidation of coal aluminium or high carbon-oxygen
Change aluminium；The material of metal shell and inner metal shell be and the handled consistent steel of molten steel composition.
In order to guarantee the intensity of impregnating cover, improve service life, the metal shell of use with a thickness of 15-25mm, such as
20mm；Thermal insulation layer with a thickness of 45-55mm, such as 50mm；Inner metal shell with a thickness of 10-20mm, such as 15mm.
Specifically, the Yarn feeding device further includes ladle 4, it from top to bottom include slag blanket 4-1, slag-steel interface 4-3 in ladle 4
With molten steel 4-2, in line feeding implementation process, impregnating cover 3-2 can be extended in molten steel 4-2；The bottom of ladle 4 is provided with for bottom blowing
The air brick 5 of argon gas, in refining process into molten steel argon bottom-blowing, play certain stirring action, while can allow one
Divide field trash to follow bubble floating into slag blanket, the field trash in steel can be effectively removed.
Embodiment 2
A kind of line feeding method is present embodiments provided, as Figure 7-9, using the Yarn feeding device of above-described embodiment 1, specifically
Include the following steps:
Step 1: in ladle bottom argon bottom-blowing, bottom blowing flow is Q1, Q1For 8-11NL/min, such as 10NL/min, in steel
Cinder inclusion face forms stable slag blister 6；
Step 2: impregnating cover is moved to the surface of slag blister 6 by transverse shifting feeding wire machine, improves argon bottom-blowing flow to Q2, Q2
For 13-17NL/min, such as 15NL/min；At this point, slag blister diameter is 490-510mm, such as 500mm；
Step 3: longitudinal movement feeding wire machine immerses impregnating cover at slag blister below molten steel, and impregnating cover immerses the depth in molten steel
Spend H and slag blanket depth HSlag blanketDifference be 50-200mm, such as 50mm；Argon bottom-blowing flow is reduced to Q3, Q3For 6-9NL/min, example
Such as 8NL/min；
Step 4: impregnating cover is moved to the position 7 of the stream stock decline opposite with slag blister by transverse shifting feeding wire machine；Due to ladle
Bottom-blowing air feed element is asymmetric distribution, and bottom blown gas is blown into, and generates and rises bubble, causes molten steel face side higher, is formed
Circulation as shown in Figure 8, bottom blown gas are blown into side in upper up-flow, and opposite side is sinking, are at the position 7 of stream stock decline herein
The metal wire of feeding is preferably mixed with molten steel, is improved efficiency using the circulation of molten steel by the position of sinking；
Step 5: starting Yarn feeding device carries out line feeding；Wire-feeding velocity is 2.0m/s；
Specifically, under the premise of bottom blown gas does not blow break layer and forms slag blister, the tolerance of adjustable bottom blown gas, gas
The increase of amount can cause the acceleration of molten steel circulation, and the mixing of line feeding metal can be improved, therefore, adjustable bottom blowing in step 5
Flow to 4NL/min, wire-feeding velocity is promoted to 2.5m/s；
Step 6: line feeding terminates, and vertically moves feeding wire machine, is promoted above impregnating cover (3-2) to steel ladle edge；Transverse shifting is fed
Impregnating cover is moved away from above ladle by line machine.
Specifically, the step 1 to step 5 stage closes pumping blower, the flue gas that line feeding generates is enclosed within impregnating cover
It is interior, it is divided using the flue gas in impregnating cover, improves line feeding recovery rate of iron；Starting is taken out before step 6 impregnating cover is moved away from above ladle
Exhaust gas first after flue dust collecting device dedusting, is discharged into external dedusting pipeline by the flue gas in impregnating cover by gas blower.
Specifically, the difference of the conical shell base diameter of the diameter and impregnating cover of slag blister is 100~200mm in the step 2,
Guarantee there is no slag blanket in impregnating cover during guarantee line feeding without slag blanket in impregnating cover.
Specifically, reduction argon bottom-blowing flow can be in ladle in argon bottom-blowing flow and step 3 by improving in step 2
One circulating current of interior formation forms the position 7 of stream stock decline, at this point, impregnating cover is moved at the position 7 of stream stock decline, opens
Beginning line feeding；Since impregnating cover is to extend to from slag blister below molten steel, so do not have slag blanket between impregnating cover and molten steel, when implementation, will
Impregnating cover moves at the position 7 of stream stock decline, is surrounded around impregnating cover by slag blanket at this time, and when line feeding, alloy wire is reacted with molten steel
When the violent spark that generates stopped by slag blanket, be unlikely to cause molten steel acutely to roll to contacting with air and cause to aoxidize, at the same by
To flow at stock decline at position 7, vapour pressure is high herein, promotes alloy to react more abundant with molten steel, uniformly, significantly improves
Yield of alloy.
Specifically, needing to adjust wire-feeding velocity and line feeding amount by feeding wire machine according to technique in step 5.
Specifically, the bottom blowing gas mode in line feeding method is as shown in Figure 9.
In the present embodiment, for certain factory SPHC steel LF refining using the present apparatus and method replace original device and process into
Row wire feeding process.Use in the present embodiment has the technological parameter such as table that technique handle and use line feeding method of the present invention
Shown in 1.As it can be seen from table 1 yield of alloy has obtained significantly after using Yarn feeding device of the invention and line feeding method processing
It improves, for example, yield of alloy reaches 42.5-53.3%, while the present invention protects line feeding process using impregnating cover, it is possible to reduce
Molten steel face is seethed, and secondary oxidation is reduced, and molten steel nitrogen pick-up and oxygenation amount are reduced, and improves Cleanliness of Molten Steel；During line feeding simultaneously
Flue dust effectively discharged, reduce environmental pollution.
1 technological parameter of table and effect
In conclusion the present invention overcomes alloy wires during traditional line feeding across slag blanket oxidation or gasifies and steam forces down
Etc. the factors problem that causes yield of alloy low, solve that melt tank reaction is violent, the serious disadvantage of secondary oxidation of steel, while
The shortcomings that overcoming soot emissions in use process, pollution environment.This method is simple and reliable, easy to use, and applicability is wide, can
Significantly improve the economic benefit of iron and steel enterprise.
Although having been combined preferred embodiment to be described in detail the present invention, those skilled in the art are answered
What it is when understanding is without prejudice to spirit of that invention and essence, and various amendments are all allowed, they both fall within this hair
Among bright scope of protection of the claims.
Claims (10)
1. a kind of ladle refining Yarn feeding device, which is characterized in that including feeding wire machine (1) and line feeding arm (3)；The line feeding arm
It (3) include cantilever (3-1) and impregnating cover (3-2)；One end of the cantilever (3-1) is connect with the outlet of feeding wire machine (1), the other end
It is connect with impregnating cover (3-2), the cantilever (3-1) can move along the vertical and lateral under the braking of feeding wire machine (1).
2. Yarn feeding device according to claim 1, which is characterized in that the Yarn feeding device further includes cleaner, described to remove
Dirt equipment includes that sequentially connected metal tube, pumping blower and flue dust collecting device, one end of the cleaner pass through metal tube
It is connect with cantilever (3-1), the flue gas generated in impregnating cover is sucked flue dust collecting device, flue dust collecting device and outside by pumping blower
Dedusting piping connection.
3. Yarn feeding device according to claim 2, which is characterized in that the cantilever (3-1) is hollow steel casing.
4. Yarn feeding device according to claim 3, which is characterized in that the top of the impregnating cover (3-2) is hollow company
It takes over (3-2-2), the connecting tube is detachably connected with cantilever (3-1)；The lower part of the impregnating cover (3-2) is hollow circular cone
Shell structure, the impregnating cover (3-2) include metal shell, thermal insulation layer and inner metal shell from outer to inner.
5. Yarn feeding device according to claim 4, which is characterized in that the conical shell internal height of the cone shell is 200-
1000mm, the diameter of a circle of the bottom of cone shell are 200-800mm.
6. Yarn feeding device according to claim 4, which is characterized in that the material of the thermal insulation layer is that magnesium-based or aluminium base are poured
Material.
7. Yarn feeding device according to claim 6, which is characterized in that the metal shell with a thickness of 15-25mm, it is described
Thermal insulation layer with a thickness of 45-55mm, the inner metal shell with a thickness of 10-20mm.
8. Yarn feeding device according to claim 7, which is characterized in that further include workbench (2) and ladle (4)；It is described
Workbench (2) is for placing feeding wire machine (1).
9. a kind of ladle refining line feeding method, which is characterized in that using the Yarn feeding device as described in claim 1 to 8, the side
Method includes the following steps:
Step 1: ladle bottom argon bottom-blowing, bottom blowing flow are Q1, stable slag blister is formed in the ladle top of the slag；
Step 2: transverse shifting feeding wire machine moves to impregnating cover right above slag blister, improves argon bottom-blowing flow to Q2；
Step 3: longitudinal movement feeding wire machine immerses impregnating cover at slag blister below molten steel, reduces argon bottom-blowing flow to Q3；
Step 4: impregnating cover is moved to the position of the stream stock decline opposite with slag blister by transverse shifting feeding wire machine；
Step 5: starting Yarn feeding device carries out line feeding；
Step 6: line feeding terminates, and vertically moves feeding wire machine, is promoted above impregnating cover to steel ladle edge；Transverse shifting feeding wire machine will soak
Stain cover is moved away from above ladle.
10. line feeding method according to claim 9, which is characterized in that the step 1 to step 5 stage closes pumping wind
The flue gas that line feeding generates is enclosed in impregnating cover by machine, and starting pumping blower will impregnate before step 6 impregnating cover is moved away from above ladle
Exhaust gas first after flue dust collecting device dedusting, is discharged into external dedusting pipeline by the flue gas in cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910457696.3A CN110184415B (en) | 2019-05-29 | 2019-05-29 | Wire feeding device and method for ladle refining |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910457696.3A CN110184415B (en) | 2019-05-29 | 2019-05-29 | Wire feeding device and method for ladle refining |
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| CN110184415B CN110184415B (en) | 2020-08-14 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110842163A (en) * | 2019-09-30 | 2020-02-28 | 鞍钢股份有限公司 | Wire feeding method and device for reducing oxygen content of rare earth wire |
| CN111394540A (en) * | 2020-04-13 | 2020-07-10 | 南京钢铁股份有限公司 | CAS furnace wire feeding machine and manufacturing method thereof |
| CN111394541A (en) * | 2020-04-13 | 2020-07-10 | 南京钢铁股份有限公司 | CAS furnace wire feeding machine and application method |
| CN111842819A (en) * | 2020-08-26 | 2020-10-30 | 安徽林洪重工科技有限公司 | Ingot mold casting device based on flow field control and using method thereof |
| CN112210640A (en) * | 2020-09-10 | 2021-01-12 | 广东韶钢松山股份有限公司 | Refining wire feeder |
| CN113736953A (en) * | 2021-09-26 | 2021-12-03 | 华北理工大学 | Production equipment and method for welding microalloy steel by high heat input |
| CN115161431A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | Steel ladle wire feeding process protected by double-layer air curtain |
| CN115161433A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | Steel ladle wire feeding device protected by double-layer air curtain |
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| CN110842163A (en) * | 2019-09-30 | 2020-02-28 | 鞍钢股份有限公司 | Wire feeding method and device for reducing oxygen content of rare earth wire |
| CN111394540A (en) * | 2020-04-13 | 2020-07-10 | 南京钢铁股份有限公司 | CAS furnace wire feeding machine and manufacturing method thereof |
| CN111394541A (en) * | 2020-04-13 | 2020-07-10 | 南京钢铁股份有限公司 | CAS furnace wire feeding machine and application method |
| CN111842819A (en) * | 2020-08-26 | 2020-10-30 | 安徽林洪重工科技有限公司 | Ingot mold casting device based on flow field control and using method thereof |
| CN112210640A (en) * | 2020-09-10 | 2021-01-12 | 广东韶钢松山股份有限公司 | Refining wire feeder |
| CN112210640B (en) * | 2020-09-10 | 2022-05-20 | 广东韶钢松山股份有限公司 | Refining wire feeder |
| CN113736953A (en) * | 2021-09-26 | 2021-12-03 | 华北理工大学 | Production equipment and method for welding microalloy steel by high heat input |
| CN115161431A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | Steel ladle wire feeding process protected by double-layer air curtain |
| CN115161433A (en) * | 2022-07-22 | 2022-10-11 | 北京科技大学 | Steel ladle wire feeding device protected by double-layer air curtain |
| CN115161431B (en) * | 2022-07-22 | 2023-12-15 | 北京科技大学 | Ladle wire feeding process with double-layer air curtain protection |
| CN115161433B (en) * | 2022-07-22 | 2023-12-15 | 北京科技大学 | Ladle wire feeding device with double-layer air curtain protection |
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