CN110273048A - Online processing position wire feeding device and method for VD furnace - Google Patents
Online processing position wire feeding device and method for VD furnace Download PDFInfo
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- CN110273048A CN110273048A CN201910499603.3A CN201910499603A CN110273048A CN 110273048 A CN110273048 A CN 110273048A CN 201910499603 A CN201910499603 A CN 201910499603A CN 110273048 A CN110273048 A CN 110273048A
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- vacuum
- silk
- vacuum tank
- container cover
- feeding
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 17
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 36
- 229910052786 argon Inorganic materials 0.000 claims description 19
- 238000007664 blowing Methods 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 11
- 229910052791 calcium Inorganic materials 0.000 claims description 11
- 239000011575 calcium Substances 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 244000144985 peep Species 0.000 claims description 9
- 230000001681 protective effect Effects 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
- 238000009966 trimming Methods 0.000 claims description 6
- 239000012716 precipitator Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000003912 environmental pollution Methods 0.000 abstract description 7
- 238000007670 refining Methods 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000001737 promoting effect Effects 0.000 description 5
- 238000003723 Smelting Methods 0.000 description 4
- 230000006837 decompression Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000011449 brick Substances 0.000 description 3
- 238000005453 pelletization Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a wire feeding device and a method for an online processing position of a VD furnace, belonging to the technical field of secondary refining, wherein a vacuum tank is provided with an accommodating space, and a steel ladle can be accommodated in the accommodating space; the vacuum tank cover is detachably buckled at the top of the vacuum tank; the wire feeding hole is formed in the vacuum tank cover; the flap valve is arranged at the wire feeding hole and opens or closes the wire feeding hole; the bottom of the wire feeding guide pipe vertically penetrates through the vacuum tank cover and extends into the vacuum tank; the guide pipe lifting component is welded on the vacuum tank cover and is in sliding connection with the wire feeding guide pipe through a guide rail. And then reached and need not promote VD vacuum tank cover to reduce the temperature loss in the wire feeding process, improve the silk thread absorptivity, reduce environmental pollution's technical effect.
Description
Technical field
The present invention relates to furnace outer refining technology field, in particular to a kind of VD furnace online processing position threads feeding apparatus and method.
Background technique
Wire feeding process is main to feed proof gold to molten steel by wire feeder with certain speed as a kind of furnace outer refining technology
Belong to line, alloy core wire, to the deoxidation of molten steel, desulfurization, non-metallic inclusion denaturation treatment and accurately finely tunes alloying component, mention
High alloy recovery rate and Molten Steel Cleanliness, to improve the quality and performance of steel.
VD purifier is generally using single tank single-station, single double tank positions of lid and double-canopy three kinds of arrangement modes in double tank positions, operation
Mode has vehicle-mounted cover formula and vehicle-mounted pot type.No matter VD purifier using which kind of arrangement mode and which kind of method of operation, feeds silk
Before operation, after all needing brokenly sky to be pressed onto atmospheric pressure again, after promoting vacuum container cover, running vacuum container cover or the vehicle-mounted tank car of operation makes ladle
Reach and feed silk position, then carries out feeding silk operation.Since molten steel is exposed and silk thread is quickly fed, steel slag easily splash, while in steel slag
On interface, the silk thread easily scaling loss by air vigorous oxidation makes molten steel nitrogen pick-up, for highly volatile micro alloying element easily
It is prominent, generate a large amount of flue gas.
Summary of the invention
The present invention provides a kind of VD furnace online processing position threads feeding apparatus and methods, to solve in the prior art due to mentioning
After rising vacuum container cover, so that molten steel is exposed and silk thread is quickly fed, steel slag easily splash causes silk thread easily by air vigorous oxidation
And scaling loss, the technical issues of polluting is generated, VD vacuum container cover need not be promoted by having reached, so that temperature damage during silk is fed in reduction
It loses, improves silk thread absorptivity, the technical effect to reduce environmental pollution.
On the one hand, the present invention provides a kind of VD furnace online processing position threads feeding apparatus, comprising: vacuum tank, the vacuum tank
With an accommodating space, and ladle can be accommodated in the accommodating space；Vacuum container cover, the vacuum container cover are removably fastened on
The top of the vacuum tank；Wire hole is fed, the wire hole of feeding is provided on the vacuum container cover；Flap valve, the flap valve setting
It is fed at wire hole in described, and opens or close hello the wire hole；Silk conduit is fed, the bottom for feeding silk conduit passes perpendicularly through described
Vacuum container cover, and protrude into the vacuum tank；Conduit lift component, the conduit lift component are welded on the vacuum container cover
On, and the conduit lift component is slidably connected by guide rail and the silk conduit of feeding.
Preferably, further includes: vacuum lead, one end of the vacuum lead are connect with the vacuum tank, the other end
It is connect with deduster.
Preferably, further includes: peep hole, the peep hole are arranged on the vacuum container cover；Or, industrial television images
Machine, the industrial television camera are monitored the Filamentous condition of feeding in the vacuum tank.
Preferably, further includes: the combination of the vacuum container cover and the vacuum tank is arranged in protective cover, the protective cover
Place.
Preferably, described feed is provided with a ring flange at wire hole, and, the ring flange is equipped with sealing ring.
On the other hand, the present invention provides a kind of VD furnace online processing positions to feed silk method, comprising: step 1: when VD furnace vacuum
When the processing time meets preset condition, vacuum main valve is closed, and nitrogen is inputted into vacuum tank using nitrogen air valve；Step 2:
After the vacuum degree of nitrogen reaches 20kpa, using the broken sky of air；Step 3: when broken empty multiple pressure meets atmospheric pressure, opening pneumatic
Flap valve, and adjust and feed the distance between silk conduit and molten steel face；Step 4: control ladle bottom blowing argon flow drives wire feeder
Alloy core wire is fed, trimming or Calcium treatment are carried out.
Preferably, further includes: be monitored by setting peep hole or by industrial television camera to silk process is fed.
Preferably, further includes: by the way that vacuum lead is arranged on the vacuum tank, by feeding, the flue gas that silk process generates is defeated
It send to gravitational precipitator.
Preferably, further includes: during broken empty multiple pressure and hello silk, bottom blowing persistently carries out Argon, and keeps argon gas stirring strong
Degree meets metallurgical function.
Preferably, further includes: feed silk conduit after feeding silk, described in automatic lifting and reach the first predetermined position, and close
The Pneumatic flap valve promotes the second predetermined position of the vacuum container cover arrival.
Said one or multiple technical solutions in the embodiment of the present invention at least have following one or more technology effects
Fruit:
A kind of VD furnace online processing position threads feeding apparatus provided in an embodiment of the present invention and method, including vacuum tank, vacuum tank
Lid feeds wire hole, Pneumatic flap valve, feeds silk conduit and conduit lift component, wherein and the vacuum tank also has an accommodating space,
And then ladle can be accommodated in the accommodating space；Hello the wire hole, Pneumatic flap valve, hello silk conduit and conduit lift component are equal
It is provided on the vacuum container cover, wherein the Pneumatic flap valve can match with hello the wire hole to work；It is described to lead
Pipe lift component is used to control the lifting for feeding silk conduit.Further, when VD furnace vacuum processing time meets technique requirement
Afterwards, vacuum main valve is closed, nitrogen decompression explosion-proof is led to vacuum tank using nitrogen air valve first, after vacuum degree reaches 20kpa,
Using the broken sky of air, after broken sky is pressed onto atmospheric pressure again, the Pneumatic flap valve will be opened, according to molten steel face actual height,
Silk conduit is fed described in procedure auto-control, and proper height on liquid level is dropped to by the wire hole of feeding.According to technique smelting requirements,
Rationally control ladle bottom blowing argon flow drives wire feeder to feed different types of alloy core wire with different silks of feeding, carry out at
Divide fine tuning or Calcium treatment.To solve in the prior art due to promoting vacuum container cover after so that molten steel is exposed and silk thread is quick
The technical issues of feeding, steel slag easily splash causes the silk thread easily scaling loss by air vigorous oxidation, generates pollution, nothing is reached
VD vacuum container cover must be promoted, to reduce temperature loss during hello silk, improves silk thread absorptivity, the technology to reduce environmental pollution
Effect.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of VD furnace online processing position threads feeding apparatus in the embodiment of the present invention；
Fig. 2 is a kind of flow diagram of VD furnace online processing position hello silk method in the embodiment of the present invention.
Description of symbols: 1- vacuum tank；2- vacuum container cover；3- Pneumatic flap valve；4- feeds wire hole；5- feeds silk conduit；6-
Conduit lift component；7- vacuum lead；8- protective cover；9- ladle.
Specific embodiment
The embodiment of the invention provides a kind of VD furnace online processing position threads feeding apparatus and methods, to solve in the prior art
After promoting vacuum container cover, so that molten steel is exposed and silk thread is quickly fed, steel slag easily splash, cause silk thread easily by air play
It is strong oxidation and scaling loss, generate pollution the technical issues of.
Technical solution in the embodiment of the present invention, general thought are as follows:
A kind of VD furnace online processing position threads feeding apparatus provided in an embodiment of the present invention and method are described true by vacuum tank
Slack tank has an accommodating space, and ladle can be accommodated in the accommodating space；Vacuum container cover, the vacuum container cover are removably detained
It closes at the top of the vacuum tank；Wire hole is fed, the wire hole of feeding is provided on the vacuum container cover；Flap valve, the flap valve
It is set at hello the wire hole, and feeds wire hole described in opening or closing；Silk conduit is fed, the bottom for feeding silk conduit passes perpendicularly through
The vacuum container cover, and protrude into the vacuum tank；Conduit lift component, the conduit lift component are welded on the vacuum tank
It covers, and the conduit lift component is slidably connected by guide rail and the silk conduit of feeding.VD vacuum tank need not be promoted by having reached
Lid improves silk thread absorptivity, the technical effect to reduce environmental pollution to reduce temperature loss during hello silk.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
Fig. 1 is a kind of structural schematic diagram of VD furnace online processing position threads feeding apparatus in the embodiment of the present invention, as shown in Figure 1,
VD furnace online processing position threads feeding apparatus includes:
Vacuum tank 1, the vacuum tank 1 has an accommodating space, and ladle 9 can be accommodated in the accommodating space.
Specifically, threads feeding apparatus is in the overhead arrangement in VD furnace online processing position half, wherein the vacuum tank 1 is main
The shape of contained structure, the vacuum tank 1 can need to be designed according to real work, and cylindrical structure can be used, can also adopt
It with rectangular parallelepiped structure, and also include an accommodating space in the inside of the vacuum tank 1, and then can in the accommodating space
Accommodate other relevant elements or material.
Vacuum container cover 2, the vacuum container cover 2 are removably fastened on the top of the vacuum tank 1.
Further, VD furnace online processing position threads feeding apparatus further include: protective cover 8, the protective cover 8 are arranged in institute
State the junction of vacuum container cover 2 Yu the vacuum tank 1.
Specifically, the vacuum container cover 2 is the covering implements at 1 top of vacuum tank, main purpose is to hide
Dust and pollutant are covered, avoids impacting the course of work of equipment.The vacuum container cover 2 is in contact with the vacuum tank 1
Section shape and size match, further, the vacuum container cover 2 shape can be designed according to actual needs, can
To be designed as semicircle, it is also designed to rectangular etc..The protective cover 8 is a Splashproof cover, and the protective cover 8 is mounted on described true
The junction of slack tank lid 2 and the vacuum tank 1, and be arranged towards molten steel face, main purpose is to feed silk in order to prevent
Splash occurs with molten steel in the process, is had an impact to silk process is fed.
Wire hole 4 is fed, the wire hole 4 of feeding is provided on the vacuum container cover 2.
Flap valve 3, the flap valve 3 are set at hello the wire hole 4, and feed wire hole 4 described in opening or closing.
Further, described feed is provided with a ring flange at wire hole 4, and, the ring flange is equipped with sealing ring.
Wire hole 4 and Pneumatic flap valve 3 are fed specifically, being provided on the vacuum container cover 2, wherein described to feed wire hole 4
It is opened in the center position of the vacuum container cover 2, the Pneumatic flap valve 3 matches with the wire hole 4 of feeding, is convenient for beating to reach
The purpose for feeding wire hole is closed on or off.Further, it adopts and is water-cooled in the hole flange port for feeding wire hole 4, and fed described
O-ring seal is installed on ring flange at wire hole 4, thus reached prevent be vacuum-treated when, from close feed wire hole from air-breathing
Influence the purpose for being vacuum-treated effect.
Silk conduit 5 is fed, the bottom for feeding silk conduit 5 passes perpendicularly through the vacuum container cover 2, and protrudes into the vacuum tank 1
It is interior.
Conduit lift component 6, the conduit lift component 6 are welded on the vacuum container cover 2, and the conduit goes up and down structure
Part 6 is slidably connected by guide rail and the silk conduit 5 of feeding.
Specifically, the silk conduit 5 of feeding is the main conveying device for feeding silk, it is described to feed silk conduit 5 and hello the wire hole 4
Matching, that is to say, that the silk conduit 5 of feeding may pass through hello the wire hole 4, then pass through the vacuum container cover 4 straight down,
And further go deep into the vacuum tank 1, towards molten steel face.VD vacuum container cover need not be promoted by having reached, and feed silk mistake to reduce
Temperature loss in journey improves silk thread absorptivity, the technical effect to reduce environmental pollution.
Further, VD furnace online processing position threads feeding apparatus further include: vacuum lead 7, the vacuum lead 7
One end connect with the vacuum tank 1, the other end is connect with deduster.
Specifically, the vacuum lead 7 is mounted on the side of the vacuum tank 1 close to the position at top, pass through institute
Dust pelletizing system pipeline can be entered for the flue dust that hello silk handles generation by stating vacuum lead 7, will feed silk processing using dust pelletizing system
The flue dust of generation is removed.Specifically, feeding the flue gas that silk process generates, by the vacuum lead 7, flue gas enters gravitational dust collection
Device separates dust with gas, and gas is discharged into atmosphere.
Further, VD furnace online processing position threads feeding apparatus further include: peep hole, the peep hole are arranged described
On vacuum container cover；Or, industrial television camera, the industrial television camera supervises the Filamentous condition of feeding in the vacuum tank
Control.
Specifically, being imaged during feeding silk using the artificial observation hole being arranged on vacuum container cover or industrial television
Machine observes line feeding process condition.Can be noted abnormalities situation in time, avoid the generation of safety accident.
Embodiment two
Fig. 2 is a kind of flow diagram of VD furnace online processing position hello silk method in the embodiment of the present invention, as shown in Fig. 2,
Feed silk method in the VD furnace online processing position
Step 1: when VD furnace vacuum processing time meets preset condition, closing vacuum main valve, and use nitrogen air valve
Nitrogen is inputted into vacuum tank 1, wherein the top of the vacuum tank 1 is additionally provided with a vacuum container cover 2, on the vacuum container cover 2
It offers respectively and feeds wire hole 4, Pneumatic flap valve 3, feeds silk conduit 5, wherein the Pneumatic flap valve 3 feeds wire hole 4 with described
Match.
Step 2: after the vacuum degree of nitrogen reaches 20kpa, using the broken sky of air.
Specifically, vacuum main valve is closed after VD furnace vacuum processing time meets technique requirement, it is broken using nitrogen first
Empty valve leads to nitrogen decompression explosion-proof to vacuum tank, after vacuum degree reaches 20kpa, using the broken sky of air.
Step 3: when the multiple pressure of broken sky meets atmospheric pressure, opening the Pneumatic flap valve 3, and adjust hello the silk conduit 5
The distance between molten steel face.
Step 4: control ladle bottom blowing argon flow, driving wire feeder feed alloy core wire, carry out at trimming or calcium
Reason.
Specifically, terminating in the vacuum processing of VD furnace, after breaking empty multiple pressure, under the premise of not promoting vacuum container cover 2, lead to
It crosses automatic control system and opens the Pneumatic flap valve 3 being arranged on the vacuum container cover 2, automatic decline is described to feed silk conduit
5 rationally control ladle bottom blowing argon flow, driving wire feeder feeding according to technique smelting requirements to proper height on molten steel face
Different types of alloy core wire carries out trimming or Calcium treatment.Specifically, after broken sky is pressed onto atmospheric pressure again, it is described pneumatic
Flap valve 3 will be opened, and according to molten steel face actual height, silk conduit 5 is fed described in procedure auto-control and is fed under wire hole 4 by described
Drop to proper height on liquid level.According to technique smelting requirements, ladle bottom blowing argon flow is rationally controlled, drives wire feeder with difference
Silk of feeding feed different types of alloy core wire, carry out trimming or Calcium treatment.
Further, further includes:, can by the way that peep hole is arranged on the vacuum container cover or by industrial television camera
It is monitored to silk process is fed.
Further, further includes: the flue gas that silk process generates is fed, by the way that vacuum lead is arranged on the vacuum tank,
Flue gas is delivered to gravitational precipitator.
Further, further includes: during broken empty multiple pressure and hello silk, bottom blowing persistently carries out Argon, and stirs argon gas
Intensity meets metallurgical function.
Further, further includes: feed silk conduit after feeding silk, described in automatic lifting and reach the first predetermined position, and close
It closes the Pneumatic flap valve, promote the second predetermined position of the vacuum container cover arrival.
Specifically, during feeding silk, using the artificial observation hole or industrial electro being arranged on the vacuum container cover 2
Depending on video camera, line feeding process condition is observed.And the flue gas generated during feeding silk, can pass through the vacuum lead 7, cigarette
Gas enters gravitational precipitator and separates dust with gas, and gas is discharged into atmosphere.Further, in broken do-nothing operation, hello silk behaviour
When making, bottom blowing whole process Argon, argon gas stirring intensity, which is subject to, meets metallurgical function.After feeding silk, silk is fed described in automatic lifting
Conduit 5 promotes vacuum container cover to a high position, carries out the operation such as subsequent thermometric, sampling, soft blow to high-order, Pneumatic flap valve closing.
Further, silk method is fed to a kind of VD furnace online processing position provided in this embodiment to be described in detail, illustrate
For, it is arranged when VD furnace using double-canopy double-pot type, and two processing positions correspond to a set of vacuum flush system, using cargo tank
Formula operation, specific using steps are as follows:
Firstly, adjusting argon bottom-blowing list brick stirring intensity after 1# processing position vacuum processing time meets technique requirement
For 25-35W/t.Vacuum main valve is closed, nitrogen decompression explosion-proof is led to 1# processing position vacuum tank using nitrogen air valve, works as vacuum degree
After reaching 20kpa, using the broken sky of air.When A vacuum pressure inside the tanks reach 101KPa, adjustment argon bottom-blowing list brick stirring is strong
Degree is 8-12W/t.
Further, the Pneumatic flap valve 3 is opened, then hello the wire hole 4 described in of silk conduit 5 of feeding drops to Xia Kou
It feeds alloy core wire (C line, Ti line or B line) according to metallurgical requirements to molten steel face 100mm and carries out trimming, wire-feeding velocity is
3-6m/s；It feeds pure calcium line and carries out Calcium treatment, feeding speed 2-3m/s is fed during silk using setting on the vacuum container cover 2
The industry camera shooting observation line feeding effect set.During line feeding, argon bottom-blowing stirring intensity is controlled according to single bottom blowing brick 8-12W/t,
Bottom blowing intensity is controlled according to the upper limit when feeding carbon line, Ti line, B line, and bottom blowing intensity is controlled according to lower limit when feeding calcium line.Line feeding
Flue gas is generated in journey, by the vacuum lead 7, flue gas enters gravitational precipitator and separates dust with gas, gas discharge
Into atmosphere.
Finally, feeding silk conduit 5 after feeding silk, described in automatic lifting to a high position, Pneumatic flap valve is closed, described in promotion
Vacuum container cover 2 carries out the operation such as subsequent thermometric, sampling, soft blow to a high position.
In aforesaid operations step, when 1# handles position hello silk processing, 2# processing position is not influenced and is vacuum-treated, to reach
Shorten the technical effect of process cycle.It when line feeding operates, is carried out in the inert atmosphere space of a relative closure, bottom blowing
Argon gas non-uniform components simultaneously, can be effectively prevented useful element oxidation and improve absorptivity.The absorptivity of C line, Ti line, B line
More conventional wire feeding process promotes 3-5%, and pure calcium line absorptivity reaches 35-40%, 3 DEG C of molten steel temperature drop < during line feeding, feeds
Generated flue gas is discharged into dust pelletizing system when silk, reduces environmental pollution.
Therefore, silk method is fed in the furnace online processing position VD provided through this embodiment, can satisfy the valuable of easy scaling loss
Special silk thread made of element feeds silk requirement, reduces and feeds the loss of silk process liquid steel temperature, improve silk thread absorptivity, reduces life
Cost is produced, while solving the problems, such as that flue gas is excessive during feeding silk, improves working environment.
Said one or multiple technical solutions in the embodiment of the present invention at least have following one or more technology effects
Fruit:
A kind of VD furnace online processing position threads feeding apparatus provided in an embodiment of the present invention and method, including vacuum tank, vacuum tank
Lid feeds wire hole, Pneumatic flap valve, feeds silk conduit and conduit lift component, wherein and the vacuum tank also has an accommodating space,
And then ladle can be accommodated in the accommodating space；Hello the wire hole, Pneumatic flap valve, hello silk conduit and conduit lift component are equal
It is provided on the vacuum container cover, wherein the Pneumatic flap valve can match with hello the wire hole to work；It is described to lead
Pipe lift component is used to control the lifting for feeding silk conduit.Further, when VD furnace vacuum processing time meets technique requirement
Afterwards, vacuum main valve is closed, nitrogen decompression explosion-proof is led to vacuum tank using nitrogen air valve first, after vacuum degree reaches 20kpa,
Using the broken sky of air, after broken sky is pressed onto atmospheric pressure again, the Pneumatic flap valve will be opened, according to molten steel face actual height,
Silk conduit is fed described in procedure auto-control, and proper height on liquid level is dropped to by the wire hole of feeding.According to technique smelting requirements,
Rationally control ladle bottom blowing argon flow drives wire feeder to feed different types of alloy core wire with different silks of feeding, carry out at
Divide fine tuning or Calcium treatment.To solve in the prior art due to promoting vacuum container cover after so that molten steel is exposed and silk thread is quick
The technical issues of feeding, steel slag easily splash causes the silk thread easily scaling loss by air vigorous oxidation, generates pollution, nothing is reached
VD vacuum container cover must be promoted, to reduce temperature loss during hello silk, improves silk thread absorptivity, the technology to reduce environmental pollution
Effect.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
The spirit and scope of bright embodiment.In this way, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of VD furnace online processing position threads feeding apparatus characterized by comprising
Vacuum tank, the vacuum tank has an accommodating space, and ladle can be accommodated in the accommodating space；
Vacuum container cover, the vacuum container cover are removably fastened on the top of the vacuum tank；
Wire hole is fed, the wire hole of feeding is provided on the vacuum container cover；
Flap valve, the flap valve are set at hello the wire hole, and feed wire hole described in opening or closing；
Silk conduit is fed, the bottom for feeding silk conduit passes perpendicularly through the vacuum container cover, and protrudes into the vacuum tank；
Conduit lift component, the conduit lift component are fixedly mounted on the vacuum container cover, and the conduit lift component
It is slidably connected by guide rail and the silk conduit of feeding.
2. VD furnace online processing position as described in claim 1 threads feeding apparatus, which is characterized in that further include:
Vacuum lead, one end of the vacuum lead are connect with the vacuum tank, and the other end is connect with deduster.
3. VD furnace online processing position as described in claim 1 threads feeding apparatus, which is characterized in that further include:
Peep hole, the peep hole are arranged on the vacuum container cover；
Or, industrial television camera, the industrial television camera is monitored the Filamentous condition of feeding in the vacuum tank.
4. VD furnace online processing position as described in claim 1 threads feeding apparatus, which is characterized in that further include:
The junction of the vacuum container cover Yu the vacuum tank is arranged in protective cover, the protective cover.
5. VD furnace online processing position as described in claim 1 threads feeding apparatus, which is characterized in that described feed is provided with one at wire hole
Ring flange, and the ring flange is equipped with sealing ring.
6. silk method is fed in a kind of VD furnace online processing position characterized by comprising
Step 1: when VD furnace vacuum processing time meets preset condition, closing vacuum main valve, and using nitrogen air valve to true
Nitrogen is inputted in slack tank；
Step 2: after the vacuum degree of nitrogen reaches 20kpa, using the broken sky of air；
Step 3: when broken empty multiple pressure meets atmospheric pressure, opening Pneumatic flap valve, and adjust and feed between silk conduit and molten steel face
Distance；
Step 4: control ladle bottom blowing argon flow, driving wire feeder feed alloy core wire, carry out trimming or Calcium treatment.
7. method as claimed in claim 6, which is characterized in that further include:
It is monitored by setting peep hole or by industrial television camera to silk process is fed.
8. method as claimed in claim 6, which is characterized in that further include:
By the way that vacuum lead is arranged on the vacuum tank, the flue gas that silk process generates will be fed and be delivered to gravitational precipitator.
9. method as claimed in claim 6, which is characterized in that further include:
During broken empty multiple pressure and hello silk, bottom blowing persistently carries out Argon, and argon gas stirring intensity is made to meet metallurgical function.
10. method as claimed in claim 6, which is characterized in that further include:
Silk conduit is fed after feeding silk, described in automatic lifting and reaches the first predetermined position, and closes the Pneumatic flap valve, promotion
The vacuum container cover reaches the second predetermined position.
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| CN201910499603.3A CN110273048A (en) | 2019-06-11 | 2019-06-11 | Online processing position wire feeding device and method for VD furnace |
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| CN201910499603.3A CN110273048A (en) | 2019-06-11 | 2019-06-11 | Online processing position wire feeding device and method for VD furnace |
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