CN105925816B - A kind of inert gas shielding cover structure - Google Patents
A kind of inert gas shielding cover structure Download PDFInfo
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- CN105925816B CN105925816B CN201610413194.7A CN201610413194A CN105925816B CN 105925816 B CN105925816 B CN 105925816B CN 201610413194 A CN201610413194 A CN 201610413194A CN 105925816 B CN105925816 B CN 105925816B
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- protective cover
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- Vertical, Hearth, Or Arc Furnaces (AREA)
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a kind of inert gas shielding cover structure; including the protective cover that is arranged between dummy electrode and crystallizer upper end face and can be in air inlet to protective cover air inlet pipe; it is characterized in that; the protective cover includes internal layer cover body and outer layer cover body; the air inlet pipe is communicated between outer layer cover body and internal layer cover body; gas outlet, which is provided with, on the internal layer cover body connects out internal layer cover body; protective gas preheating chamber is formed between outer layer cover body and internal layer cover body, protective gas preheating chamber forms protective cover cooling structure after entering protective gas.The present invention has simple in construction, is hardly damaged, atmosphere protection is stable, it is possible to increase smelts security, the advantages that improving metallurgical effect.
Description
Technical field
The present invention relates to the inert gas of a kind of electroslag refining furnace of metal smelt, more particularly to a kind of electroslag refining furnace to protect
Shield structure.
Background technology
Metal electroslag furnace（Also known as electroslag refining furnace）It is to be used as thermal source by resistance heat caused by slag by the use of electric current to enter
A kind of metallurgical equipment of row melting, its structure mainly include overall crystallizer, the column positioned at crystallizer side in oven-like, stood
Horizontal cantilever is provided with above post, is provided with horizontal cantilever by electrode bar chuck face crystallizer and extends down into crystallizer
Electrode bar.
When electroslag furnace smelts work, electroslag is put into crystallizer, and slag bath to be melted is formed above crystallizer, is used
Electrode bar chuck clamps cylindricality electrode bar, and allow electrode bar, slag bath, metal bath, steel ingot, bottom water tank by short net wire and
Transformer can form current loop.When carrying out electroslag smelting, first by the electrode bar away from electroslag smelting electrode bar chuck
In end insertion slag, then electrode bar is powered, in galvanization, electrode bar and slag bath release Joule heat, by slag
Regulus fusing in pond.Molten metal pools liquid, through slag bath, falls into and metal bath is formed in crystallizer, and simultaneously
Acted on by water cooling, be quickly solidified to form steel ingot.Before ingot solidification, metal bath and slag bath in its top, play insulation and mend
Contracting acts on, and ensures the compactness of steel ingot.In smelting process, formed with one layer of thin skull on crystallizer inwall, not only make steel ingot table
Face is bright and clean, also plays insulation and heat-blocking action, more heats is advantageous to the orientation knot of steel ingot from bottom to top to lower conduction
It is brilliant.Based on above reason, the ingot quality produced by electroslag smelting is good, performance is excellent, low temperature, room temperature and the high temperature of steel alloy
Under plasticity and impact flexibility enhancing, steel service life extend, therefore electroslag smelting technique widely uses in this industry.
But in existing electroslag smelting technique, use mostly under atmospheric pressure state and carry out electroslag remelting, remelting is easy under air
Cause the secondary oxidation of steel ingot, cause the scaling loss of active element so that the oxygen content and inclusion content in steel are higher, it is difficult to raw
The special steel of output high-cleanness, high.Atmosphere protection technology, but existing electroslag smelting are provided with the existing electroslag smelting device in part
Training of qi atmosphere protection technique is mainly divided to two kinds：1st, general EAR stove is protected using direct blown inert gas, top of the slag sealing effect
Difference, melting loss of elements are still more serious；2nd, it is in protective atmosphere electroslag furnace that crystallizer to dummy electrode part is all overall by protective cover
Sealing, crystallizer in reflow process, the top of the slag is set to be protected all the time with air exclusion and logical protective gas.Such as
A kind of coaxial atmosphere protected electro-slag re-melting stove disclosed in ZL201420422529.8.
But in the remelting furnace, dummy electrode part needs to set movable sealing structure, movable sealing structure is complicated and hot environment under
It is easily damaged, protective cover upper end can be along dummy electrode upward sliding during dummy electrode is descending during smelting, therefore dummy electrode need to be set very
Length is stepped down, and is so unfavorable for the axiality control of electrode, easily arc phenomenon is beaten in generation causes crystallizer to damage；Use simultaneously
Water-cooling pattern protects integral seal structure, and protecting effect is preferable but device structure is complicated, remelting preparation time length, safeguards and protects
Support difficulty；When implementing in addition in existing electroslag refining furnace, its transformation process is often required that the transmission of whole existing electroslag
It is expensive to substantially increase production cost, and complex operation in equipment use and control system is replaced.In addition in weight
There is also the potential safety hazard of larger generation leakage accident for the water-cooling system that its device is set above molten bath.
The content of the invention
For above-mentioned the deficiencies in the prior art, the technical problems to be solved by the invention are：How a kind of structure letter is provided
It is single, it is hardly damaged, atmosphere protection is stable, it is possible to increase smelt security, improve the inert gas shielding cover structure of metallurgical effect.
In order to solve the above-mentioned technical problem, present invention employs following technical scheme：
A kind of inert gas shielding cover structure, including the protective cover being arranged between dummy electrode and crystallizer upper end face and
Air inlet pipe that can be in air inlet to protective cover, it is characterised in that the protective cover includes internal layer cover body and outer layer cover body, it is described enter
Tracheae is communicated between outer layer cover body and internal layer cover body, and being provided with gas outlet on the internal layer cover body connects out internal layer cover body, outside
Protective gas preheating chamber is formed between layer cover body and internal layer cover body, protective gas preheating chamber forms guarantor after entering protective gas
Shield cooling structure.
So, the very simple double-deck cover body structure of use, dexterously makes it realize charge heating and protective cover simultaneously
The double effectses of cooling protection, extra cooling source and pre- thermal source are not added, dramatically saves on cost.Protective gas preheats
After enter back into crystallizer, avoid protective gas temperature too low in crystallizer smelt reaction caused by impact fluctuate and influence
Smelting quality.Particularly protective gas is usually that compression is stored in storage tank, and discharge rear gas volume change has one greatly
The process of heat absorption, the heat of contact object can be consumingly drawn, if entered directly into without preheating in crystallizer, is easy for
Influence metallurgical effect.Simultaneously because in crystallizer smelting process, internal hot gas rises, and heat obtains protective cover, can caused quickly
Protective cover temperature raises, therefore sets double-deck cover body to carry out cooling down the protecting effect that can preferably improve to protective cover itself, keeps away
Exempt to damage because temperature is too high, extend protective cover service life.In addition, the structure of double-deck cover body so that when in smelting process,
When having any layer cover body breakage, protective cover can continue to use and continue to the gas shield atmosphere in crystallizer, to smelting
Mending-leakage is carried out after end again, drastically increases the reliability and security of gas shield in smelting process.
As optimization, protective cover upper end is fixedly connected on dummy electrode, and protective cover is that airtight asbestos cloth is vertically flexible
When folding is made so that dummy electrode is descending, protective cover can produce vertical folding shrinking.
So, when electroslag refining furnace is smelted, protective cover upper end is fixedly installed on dummy electrode, passes through air inlet pipe before smelting
Control protective gas enters and atmosphere protection is carried out in crystallizer, and dummy electrode is descending in smelting process drives protective cover upper end descending
Drawn close with protective cover lower end, reduce protective cover inner space volume, the progress so that with smelting can step up protective cover
The air pressure of interior protective gas, preferably force molten metal liquid to flow down in crystallizer by the air pressure, improve and smelt
Efficiency.Simultaneously protective cover upper end and dummy electrode linkage, therefore dummy electrode length need not set it is long so that protective cover upper end is thereon
Slide, dummy electrode lower end is easy to keep from molten electrode axiality, improves and smelts stability and security.In addition, on protective cover
End is fixed on that dummy electrode is motionless, is servo-actuated by the flexible folding and dummy electrode of protective cover itself, such protective cover upper end and dummy electrode
For secure fit, structure is more stable in high-temperature severe environment, is more hardly damaged.Meanwhile be located at can on crystallizer for protective cover
It is enough preferably to avoid smelting high temperature, extend the atmosphere protection device life-span, and protective cover can be given when smelting inside to crystallizer
Certain protective gas positive pressure is provided, in favor of the progress of smelting, improves smelting quality and efficiency.
As optimization, protective cover upper end is fixedly connected on dummy electrode by a upper retainer ring, and upper Fixing shrink ring is connected on
Dummy electrode is outer and bottom is the discoid connecting portion to be extended radially outwardly along dummy electrode, connects lower surface and protective cover upper end
It is tightly connected, upper retainer ring top is the fixed part extended axially upward along dummy electrode, and screw is horizontally arranged with simultaneously on fixed part
Top screw is fixed on dummy electrode inwardly through screw, and bleed passage is additionally provided with upper retainer ring.
So, upper retainer ring facilitates the installation of protective cover upper end to fix, quick and easy for installation, fixed reliable, sets simultaneously
Bleed passage can when protective gas is passed through, by air in protective cover from bleed passage extrude, beneficial to the shape of protective atmosphere
Into.
As optimization, discouraged governor motion is additionally provided with upper retainer ring, the discouraged governor motion includes one and lost heart
Regulating bolt, regulating bolt of losing heart laterally is set and screw thread coordinates on the connecting portion of upper retainer ring, regulating bolt outer end of losing heart
It is exposed to connecting portion outer surface and forms regulation handle, the inner rotatable and axial limiting of regulating bolt of losing heart coordinates at one
On the regulating block inside retainer ring, regulating block is inner interior positioned at bleed passage and regulating block can be with discouraged regulating bolt
Rotation is displaced outwardly gradually to close bleed passage.
So, regulating bolt of losing heart can be relied on conveniently and efficiently to adjust the cross section size of bleed passage, is let out with regulation
The size of tolerance so that maintain the size of positive air pressure in crystallizer adjustable during smelting after protective gas air inlet, to cause the pressure
Power can better adapt to smelting demand, improve metallurgical effect.Simultaneously when protective gas air inlet formation protection atmosphere in crystallizer
Afterwards, it can also in time turn down as needed and be even switched off bleed passage, to keep protective gas atmosphere and the protection in crystallizer
Gas positive pressure, and save protective gas consumption.
As optimization, sealing structure is additionally provided between upper retainer ring and dummy electrode, upper sealing structure is convex including one
Go out to be formed at the spacing circle convex platform of dummy electrode outer surface, in addition to be compressed in spacing circle convex platform upper surface and upper retainer ring
Upper sealing ring between lower surface.
So, it is convenient to realize upper sealed connection between retainer ring and dummy electrode, avoid losing heart from junction.
As optimization, protective cover lower end is connected to crystallizer upper end face by a discoid lower fixed ring seals,
Air inlet pipe is arranged in lower retainer ring.
So, the setting of lower retainer ring more facilitates being fixedly connected for protective cover lower end.
As optimization, the inner position of crystallizer upper end face is provided with the limited block of inverted L-shaped, in the lower retainer ring
Sidepiece card pressure is spacing in limited block, and lower retainer ring outside portion is run through by vertically arranged connecting bolt to be connected on crystallizer
End, pressure is provided with lower seal and realizes sealing between lower retainer ring lower surface and crystallizer upper end face.
So so that lower retainer ring is quick and easy for installation, fixed reliable and good sealing effect.
As optimization, escape pipe is provided with the gas outlet, escape pipe is located at internal layer cover body lower position and escape pipe
Face crystallizer internal cavity is set outgassing direction obliquely.
So, escape pipe is set up on gas outlet and carries out outlet, outgassing direction lower section outlet inwardly can be better ensured that, carried
High atmosphere protection effect.
As further optimization, escape pipe horizontal plane vertical projection along between electrode and crystallizer internal cavity among space
Round tangential direction is set.So, the protective gas of entrance can along spatially spiral between electrode and crystallizer internal cavity to flow down
It is dynamic, atmosphere protection is realized preferably to reach smelting position, improves atmosphere protection effect.
As further optimization, one-way pressure valve is provided with escape pipe, for when between outer layer cover body and internal layer cover body
After accumulating certain gas pressure, escape pipe outlet is just unidirectionally opened, ensures filling gas between outer layer cover body and internal layer cover body
Quantity, to ensure to the cooling effect of protective cover.
As further optimization, air inlet pipe and escape pipe are arranged at unilateral above crystallizer and are located at opposite direction.This
Sample escape pipe is unilateral to be set, and is more favorable for the discharge of opposite side air, beneficial to the foundation of protective gas atmosphere, while air inlet pipe and
Escape pipe is located at opposite direction, can extend flow path of the protective gas between two layers of cover body, preferably improves to protecting
Protect the pre-heat effect of gas.
As further optimization, the outer layer cover body upper end is additionally provided with the pump drainage feed channel of belt switch valve and the external world connects
It is logical.So, pump drainage feed channel can be first passed through by evacuating air in double casing body before being passed through protective gas so that double-deck cover body
It is bonded to each other, is then shut off switch valve, then be passed through protective gas so that protective gas is packed into double casing body internal cavities, shape
Entered again from escape pipe after into certain pressure and atmosphere protection is realized in crystallizer.Thus can be when being passed through protective gas more
Full double casing body inner space is first filled well, and protective gas pre-heat effect and the protective cover that double-deck cover body has been better achieved are cold
But effect.
In summary, the present invention has simple in construction, is hardly damaged, and atmosphere protection is stable, it is possible to increase security is smelted,
The advantages that improving metallurgical effect.
Brief description of the drawings
Fig. 1 is a kind of structural representation for the electroslag refining furnace for employing structure of the present invention.
Fig. 2 is the structural representation of separately protected cover portion point in Fig. 1.
Embodiment
The present invention is made with reference to a kind of electroslag refining furnace for employing structure of the present invention and its accompanying drawing further detailed
Describe in detail bright.
During specific implementation：As shown in Figure 1-2, a kind of electroslag refining furnace, including crystallizer 1, it is vertically arranged to crystallizer one
The column 2 of side, the top of column 2 are provided with horizontal cantilever 3, are provided with downwards by terminal clamp face crystallizer on horizontal cantilever 3
The dummy electrode 4 of extension, in addition to for driving the lowering or hoisting gear of horizontal cantilever elevating movement on column；Also include atmosphere protection
Device, atmosphere protection device include being arranged at protective cover 5 between dummy electrode 4 and the upper end face of crystallizer 1 and can air inlet arrive
Air inlet pipe 6 in protective cover 5, its feature are that the upper end of protective cover 5 is fixedly connected on dummy electrode 4, and protective cover 5 is airtight
Material vertically flexible folding be made cause dummy electrode it is descending when, protective cover can produce vertical folding shrinking.During implementation, institute
Stating lowering or hoisting gear includes a leading screw 7 being vertically set up in parallel with column, and leading screw 7, which is rotatably engaged to be arranged on, is fixed on transverse direction
In one nut of cantilever 3, the lower end of leading screw 7 is connected by reductor with lifting motor 8；It can so realize to horizontal cantilever
Elevating control, and it is simple in construction, control is reliable and stable.During implementation, air inlet pipe and inert gas source are connected to crystallizer and provide guarantor
Protect gas.During implementation, protective cover uses to be made of non-ignitable exotic material, can be preferably specifically that airtight asbestos cloth obtains
Arrive.
So, when electroslag refining furnace is smelted, protective cover upper end is fixedly installed on dummy electrode, passes through air inlet pipe before smelting
Control protective gas enters and atmosphere protection is carried out in crystallizer, and dummy electrode is descending in smelting process drives protective cover upper end descending
Drawn close with protective cover lower end, reduce protective cover inner space volume, the progress so that with smelting can step up protective cover
The air pressure of interior protective gas, preferably force molten metal liquid to flow down in crystallizer by the air pressure, improve and smelt
Efficiency.Simultaneously protective cover upper end and dummy electrode linkage, therefore dummy electrode length need not set it is long so that protective cover upper end is thereon
Slide, dummy electrode lower end is easy to keep from molten electrode axiality, improves and smelts stability and security.In addition, on protective cover
End is fixed on that dummy electrode is motionless, is servo-actuated by the flexible folding and dummy electrode of protective cover itself, such protective cover upper end and dummy electrode
For secure fit, structure is more stable in high-temperature severe environment, is more hardly damaged.Meanwhile be located at can on crystallizer for protective cover
It is enough preferably to avoid smelting high temperature, extend the atmosphere protection device life-span, and protective cover can be given when smelting inside to crystallizer
Certain protective gas positive pressure is provided, in favor of the progress of smelting, improves smelting quality and efficiency.
Wherein, the upper end of protective cover 5 is fixedly connected on dummy electrode 4 by a upper retainer ring 9, and upper retainer ring 9 is socketed in
Dummy electrode is outer and bottom is the discoid connecting portion to be extended radially outwardly along dummy electrode, connects lower surface and protective cover upper end
It is tightly connected, the upper top of retainer ring 9 is the fixed part extended axially upward along dummy electrode, and screw is horizontally arranged with simultaneously on fixed part
Top screw is fixed on dummy electrode inwardly through screw, and bleed passage 10 is additionally provided with upper retainer ring.
So, upper retainer ring facilitates the installation of protective cover upper end to fix, quick and easy for installation, fixed reliable, sets simultaneously
Bleed passage can when protective gas is passed through, by air in protective cover from bleed passage extrude, beneficial to the shape of protective atmosphere
Into.
Wherein, discouraged governor motion is additionally provided with upper retainer ring, the discouraged governor motion includes a regulation of losing heart
Bolt 11, regulating bolt of losing heart 11 is laterally set and screw thread coordinates on the connecting portion of upper retainer ring, outside regulating bolt 11 of losing heart
End is exposed to connecting portion outer surface and forms regulation handle, and the inner rotatable and axial limiting of regulating bolt of losing heart 11 coordinates
On one regulating block 12 being located inside retainer ring, the inner and regulating block interior positioned at bleed passage 10 of regulating block 12 can be with discouraged
The rotation of regulating bolt is displaced outwardly gradually to close bleed passage 10.
So, regulating bolt of losing heart can be relied on conveniently and efficiently to adjust the cross section size of bleed passage, is let out with regulation
The size of tolerance so that maintain the size of positive air pressure in crystallizer adjustable during smelting after protective gas air inlet, to cause the pressure
Power can better adapt to smelting demand, improve metallurgical effect.Simultaneously when protective gas air inlet formation protection atmosphere in crystallizer
Afterwards, it can also in time turn down as needed and be even switched off bleed passage, to keep protective gas atmosphere and the protection in crystallizer
Gas positive pressure, and save protective gas consumption.
Wherein, sealing structure is additionally provided between upper retainer ring 9 and dummy electrode 4, upper sealing structure includes a protrusion
The spacing circle convex platform 13 of dummy electrode outer surface is formed at, in addition to is compressed in the spacing upper surface of circle convex platform 13 and upper fixation
Upper sealing ring 14 between the lower surface of ring 9.During implementation, upper sealing ring 14 preferably uses high-temperature flame-proof cotton to obtain and uses the longevity to extend
Life.
So, it is convenient to realize upper sealed connection between retainer ring and dummy electrode, avoid losing heart from junction.
Wherein, the lower end of protective cover 5 is sealedly connected on the upper end face of crystallizer 1 by a discoid lower retainer ring 15,
Air inlet pipe is arranged in lower retainer ring.
So, the setting of lower retainer ring more facilitates being fixedly connected for protective cover lower end.
Wherein, the inner position of the upper end face of crystallizer 1 is provided with the limited block 16 of inverted L-shaped, the lower retainer ring 15
Inside portion card pressure is spacing in limited block 16, and the lower outside portion of retainer ring 15 is run through by vertically arranged connecting bolt 17 is connected to knot
Brilliant device upper end, pressure is provided with lower seal 18 and realizes sealing between lower retainer ring lower surface and crystallizer upper end face.
So so that lower retainer ring is quick and easy for installation, fixed reliable and good sealing effect.During implementation, lower seal 18
It is preferred that high-temperature flame-proof cotton is used to obtain to increase the service life.
Wherein, in addition to protective gas preheating structure, protective gas preheating structure include a protective gas preheating chamber
19, the air inlet pipe 6 is connected after air inlet preheats to protective gas preheating chamber 19 and reconnected in air inlet to protective cover.
So, entered back into after protective gas preheating in crystallizer, avoid protective gas temperature too low to smelting in crystallizer
Impact caused by refining reaction is fluctuated and influences smelting quality.Particularly protective gas is usually that compression is stored in storage tank, is released
Release rear gas volume and become the big process for having a heat absorption, the heat of contact object can be consumingly drawn, if without pre-
Heat is entered directly into crystallizer, is easy for influenceing metallurgical effect.
Wherein, in addition to for realizing the protective cover cooling structure cooled down to protective cover.This is due to that crystallizer was smelted
Cheng Zhong, internal hot gas rise, and heat obtains protective cover, and protective cover temperature can be caused to raise quickly, therefore set cooling structure to carry out
Cooling can preferably improve the protecting effect to protective cover itself, avoid damaging because temperature is too high, and extending protective cover makes
Use the life-span.
Wherein, the protective cover includes internal layer cover body and outer layer cover body, and the air inlet pipe is communicated to outer layer cover body and internal layer
Between cover body, gas outlet is provided with the internal layer cover body and connects out internal layer cover body, is formed between outer layer cover body and internal layer cover body
Protective gas preheating chamber, protective gas preheating chamber form protective cover cooling structure after entering protective gas.
So, the very simple double-deck cover body structure of use, dexterously makes it realize above-mentioned charge heating and guarantor simultaneously
The double effectses of shield cooling protection, extra cooling source and pre- thermal source are not added, dramatically saves on cost.It is simultaneously double-deck
The structure of cover body so that when in smelting process, there is any layer cover body breakage, protective cover can continue to use and continue to tie
Gas shield atmosphere in brilliant device, carries out mending-leakage again after terminating to smelting, drastically increase gas shield in smelting process
Reliability and security.
Wherein, escape pipe 20 is provided with the gas outlet, escape pipe 20 is located at internal layer cover body lower position and escape pipe
The inner chamber of face crystallizer 1 is set outgassing direction obliquely.
So, escape pipe is set up on gas outlet and carries out outlet, outgassing direction lower section outlet inwardly can be better ensured that, carried
High atmosphere protection effect.
Wherein, vertical projection tangent line along electrode and crystallizer internal cavity between space middle circle of the escape pipe 20 in horizontal plane
Direction is set.So, the protective gas of entrance can flow downward along spatially spiral between electrode and crystallizer internal cavity, with more preferable
Ground reaches smelting position and realizes atmosphere protection, improves atmosphere protection effect.
Wherein, one-way pressure valve is provided with escape pipe 20, for when accumulating one between outer layer cover body and internal layer cover body
After determining gas pressure, escape pipe outlet is just unidirectionally opened, ensures the quantity of filling gas between outer layer cover body and internal layer cover body, with
Ensure the cooling effect to protective cover.
Wherein, air inlet pipe 6 and escape pipe 20 are arranged at unilateral above crystallizer and are located at opposite direction.Such escape pipe
One side is set, and is more favorable for the discharge of opposite side air, beneficial to the foundation of protective gas atmosphere, while air inlet pipe and escape pipe position
In opposite direction, flow path of the protective gas between two layers of cover body can be extended, preferably improved to protective gas
Pre-heat effect.
Wherein, the outer layer cover body upper end is additionally provided with the pump drainage feed channel 21 of belt switch valve and connected with the external world.So, lead to
Pump drainage feed channel can be first passed through by evacuating air in double casing body before entering protective gas so that double casing body is bonded to each other,
Switch valve is then shut off, then is passed through protective gas so that protective gas is packed into double casing body internal cavities, forms certain pressure
Entered again from escape pipe afterwards and atmosphere protection is realized in crystallizer.Thus preferably can first it be filled when being passed through protective gas
Full double casing body inner space, has been better achieved the protective gas pre-heat effect and protective cover cooling effect of double-deck cover body.
In summary, the present invention has simple in construction, is hardly damaged, and atmosphere protection is stable, it is possible to increase security is smelted,
The advantages that improving metallurgical effect.
Claims (7)
1. a kind of inert gas shielding cover structure, including the protective cover and energy being arranged between dummy electrode and crystallizer upper end face
Air inlet pipe in enough air inlets to protective cover, it is characterised in that the protective cover includes internal layer cover body and outer layer cover body, the air inlet
Pipe is communicated between outer layer cover body and internal layer cover body, and being provided with gas outlet on the internal layer cover body connects out internal layer cover body, outer layer
Protective gas preheating chamber is formed between cover body and internal layer cover body, protective gas preheating chamber forms protection after entering protective gas
Cover cooling structure；
Protective cover upper end is fixedly connected on dummy electrode, and protective cover is that vertically flexible folding is made so that vacation airtight asbestos cloth
When electrode is descending, protective cover can produce vertical folding shrinking.
2. inert gas shielding cover structure as claimed in claim 1, it is characterised in that protective cover upper end passes through a upper fixation
Ring is fixedly connected on dummy electrode, and upper Fixing shrink ring is connected on outside dummy electrode and bottom is the disk to be extended radially outwardly along dummy electrode
The connecting portion of shape, connects lower surface and protective cover upper end is tightly connected, and upper retainer ring top is to prolong axially upwards along dummy electrode
The fixed part stretched, screw is horizontally arranged with fixed part and top screw is fixed on dummy electrode inwardly through screw, upper fixation
Bleed passage is additionally provided with ring.
3. inert gas shielding cover structure as claimed in claim 2, it is characterised in that be additionally provided with discouraged tune in upper retainer ring
Mechanism is saved, the discouraged governor motion includes a discouraged regulating bolt, and regulating bolt of losing heart laterally is set and screw thread coordinates
On the connecting portion of upper retainer ring, regulating bolt outer end of losing heart is exposed to connecting portion outer surface and forms regulation handle, loses heart and adjusts
Section bolt the inner is rotatable and axial limiting coordinates at one on the regulating block inside retainer ring, and regulating block the inner, which is located at, lets out
In gas passage and regulating block can be displaced outwardly with the rotation of discouraged regulating bolt gradually to close bleed passage.
4. inert gas shielding cover structure as claimed in claim 2, it is characterised in that upper also to be set between retainer ring and dummy electrode
Sealing structure is equipped with, upper sealing structure includes one and protrudes the spacing circle convex platform for being formed at dummy electrode outer surface, in addition to
The upper sealing ring being compressed between spacing circle convex platform upper surface and upper retainer ring lower surface.
5. inert gas shielding cover structure as claimed in claim 1, it is characterised in that protective cover lower end is discoid by one
Lower fixed ring seals be connected to crystallizer upper end face, air inlet pipe is arranged in lower retainer ring.
6. inert gas shielding cover structure as claimed in claim 5, it is characterised in that the inner position of crystallizer upper end face
The limited block for being equipped with inverted L-shaped is installed, the lower retainer ring inside portion card pressure is spacing in limited block, and lower retainer ring outside portion is by perpendicular
Run through to the connecting bolt of setting and be connected to crystallizer upper end, press and be provided between lower retainer ring lower surface and crystallizer upper end face
Lower seal realizes sealing.
7. inert gas shielding cover structure as claimed in claim 1, it is characterised in that be provided with outlet in the gas outlet
Pipe, escape pipe is located at internal layer cover body lower position and the face crystallizer internal cavity setting obliquely of escape pipe outgassing direction.
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| CN201610413194.7A CN105925816B (en) | 2016-06-13 | 2016-06-13 | A kind of inert gas shielding cover structure |
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| CN201610413194.7A CN105925816B (en) | 2016-06-13 | 2016-06-13 | A kind of inert gas shielding cover structure |
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| CN108436044B (en) * | 2018-05-31 | 2020-05-05 | 佛山峰合精密喷射成形科技有限公司 | Smelting and casting equipment |
| CN112760492A (en) * | 2020-12-31 | 2021-05-07 | 中兴能源装备有限公司 | Positive pressure flexible atmosphere protection cover and electroslag furnace |
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| CN2660454Y (en) * | 2003-09-12 | 2004-12-01 | 河南中原特殊钢厂 | Fire hole gas protector for electric slag resmelting |
| CN200952900Y (en) * | 2006-09-27 | 2007-09-26 | 比亚迪股份有限公司 | Atmosphere protecting device |
| CN200996038Y (en) * | 2007-01-18 | 2007-12-26 | 东北大学 | Sealing protecter during electroslag remelting process |
| CN104451182A (en) * | 2014-12-15 | 2015-03-25 | 重庆钢铁(集团)有限责任公司 | Metal electroslag remelting smelting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205907335U (en) * | 2016-06-13 | 2017-01-25 | 重庆钢铁(集团)有限责任公司 | Atmosphere protecting device |
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2016
- 2016-06-13 CN CN201610413194.7A patent/CN105925816B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2139362C1 (en) * | 1998-04-14 | 1999-10-10 | Общество с ограниченной ответственностью Научно-производственное предприятие "Валок" | Crystallizer for electroslag fusion |
| CN2660454Y (en) * | 2003-09-12 | 2004-12-01 | 河南中原特殊钢厂 | Fire hole gas protector for electric slag resmelting |
| CN200952900Y (en) * | 2006-09-27 | 2007-09-26 | 比亚迪股份有限公司 | Atmosphere protecting device |
| CN200996038Y (en) * | 2007-01-18 | 2007-12-26 | 东北大学 | Sealing protecter during electroslag remelting process |
| CN104451182A (en) * | 2014-12-15 | 2015-03-25 | 重庆钢铁(集团)有限责任公司 | Metal electroslag remelting smelting device |
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