CN105861849A - Electroslag remelting furnace - Google Patents
Electroslag remelting furnace Download PDFInfo
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- CN105861849A CN105861849A CN201610410331.1A CN201610410331A CN105861849A CN 105861849 A CN105861849 A CN 105861849A CN 201610410331 A CN201610410331 A CN 201610410331A CN 105861849 A CN105861849 A CN 105861849A
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- 230000001681 protective effect Effects 0.000 claims abstract description 161
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 23
- 238000007670 refining Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 9
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 6
- 238000010943 off-gassing Methods 0.000 claims description 5
- 230000003028 elevating effect Effects 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 abstract description 40
- 230000000694 effects Effects 0.000 abstract description 29
- 239000007789 gas Substances 0.000 description 76
- 238000000034 method Methods 0.000 description 15
- 239000002893 slag Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 9
- 238000005457 optimization Methods 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 239000002184 metal Substances 0.000 description 8
- 241001062472 Stokellia anisodon Species 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 241000722270 Regulus Species 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000003031 feeding effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses an electroslag remelting furnace. The electroslag remelting furnace comprises a crystallizer and a vertical column vertically arranged at one end of the crystallizer. A transverse cantilever is arranged above the vertical column. A fake electrode stretching downwards is arranged at the position, close to an electrode chuck and right opposite to the crystallizer, of the transverse cantilever. The electroslag remelting furnace further comprises a lifting device for driving the transverse cantilever to ascend and descend on the vertical column and an atmosphere protection device, wherein the atmosphere protection device comprises a protective cover arranged between the surface of the upper end of the fake electrode and the surface of the upper end of the crystallizer and a gas inflow pipe enabling gas to enter the protective cover. The electroslag remelting furnace is characterized in that the upper end of the protective cover is fixedly connected to the fake electrode, and the protective cover is made of an airtight material and is flexibly folded in the vertical direction, so that when the fake electrode moves downwards, the protective cover generates vertical folding shrinkage. The electroslag remelting furnace has the advantages of being simple in structure, not prone to damage, stable in atmosphere protection, capable of improving smelting safety and the smelting effect and the like.
Description
Technical field
The present invention relates to a kind of metal smelt technology, particularly relate to a kind of electroslag refining furnace.
Background technology
The resistance heat that metal electroslag furnace (having another name called electroslag refining furnace) produces when being and utilize electric current by slag carries out a kind of metallurgical equipment of melting as thermal source, its structure mainly includes the entirety crystallizer in oven-like, is positioned at the column of crystallizer side, column is provided above horizontal cantilever, and horizontal cantilever is just being provided with, by electrode bar chuck, the electrode bar extending down into crystallizer to crystallizer.
During electroslag furnace smelting work, electroslag puts into crystallizer, and above crystallizer, form slag bath to be melted, use electrode bar chuck to clamp cylindricality electrode bar, and allow electrode bar, slag bath, metal bath, steel ingot, bottom water case can form current loop by short net wire and transformator.When carrying out electroslag smelting, first being inserted in slag away from the end of electroslag smelting electrode bar chuck by this electrode bar, be energized electrode bar subsequently, in galvanization, electrode bar and slag bath release Joule heat, are melted by the regulus in slag bath.Motlten metal pools liquid, through slag bath, falls into formation metal bath in crystallizer, and simultaneously by water-cooled effect, is quickly solidified to form steel ingot.Before ingot solidification, the metal bath above it and slag bath, play insulation and feeding effect, it is ensured that the compactness of steel ingot.In smelting process, crystallizer inwall is formed with one layer of thin skull, not only makes surface of steel ingot bright and clean, also play insulation and heat-blocking action, make more heat to lower conduction, beneficially steel ingot crystallographic orientation from bottom to top.Based on above reason, the ingot quality produced by electroslag smelting is good, performance is excellent, and plasticity and impact flexibility under the low temperature of steel alloy, room temperature and high temperature strengthen, and steel extend service life, therefore electroslag smelting technique is widely used in this industry.
But in existing electroslag smelting technique, mostly using under atmospheric pressure state and carry out electroslag remelting, under air, remelting easily causes the secondary oxidation of steel ingot, causes the scaling loss of active element, make the oxygen content in steel and inclusion content higher, be difficult to produce the special steel of high-cleanness, high.Part existing electroslag smelting device is provided with atmosphere protection technology, but existing electroslag smelting atmosphere protection technology mainly divides two kinds
: 1, general EAR stove uses direct blown inert gas to protect, and top of the slag sealing effect is poor, and melting loss of elements is the most more serious；2, in protective atmosphere electroslag furnace by crystallizer to dummy electrode part all by protective cover integral sealing, make crystallizer in reflow process, the top of the slag protect with air exclusion logical protective gas all the time.Such as disclosed in ZL201420422529.8 a kind of coaxial atmosphere protected electro-slag re-melting stove.
But in this remelting furnace; dummy electrode part needs to arrange movable sealing structure; it is easily damaged under movable sealing structure complexity and hot environment; during during smelting, dummy electrode is descending, protective cover upper end can be along dummy electrode upward sliding; therefore dummy electrode need to arrange the longest stepping down; so being unfavorable for that the axiality of electrode controls, easy generation is beaten arc phenomenon and is caused crystallizer to damage；Using water-cooling pattern protection integral seal structure, preferably but device structure is complicated for protected effect, and the remelting preparation time is long simultaneously, maintaining difficulty；During when additionally implementing in existing electroslag refining furnace, its transformation process often requires that and transmission and the control system of whole existing electroslag is replaced, the expensive production cost that substantially increases, and equipment uses, operation is complicated.The water-cooling system that additionally its device is arranged above remelting pond there is also the bigger potential safety hazard that leakage accident occurs.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the technical problem to be solved is: how to provide a kind of simple in construction, be hardly damaged, atmosphere protection is stable, it is possible to increase smelt safety, improves the electroslag refining furnace of metallurgical effect.
In order to solve above-mentioned technical problem, present invention employs following technical scheme:
A kind of electroslag refining furnace, including crystallizer, the column that is vertically arranged to crystallizer side, column is provided above horizontal cantilever, horizontal cantilever is just provided with, by terminal clamp, the dummy electrode downwardly extended to crystallizer, also includes for driving horizontal cantilever lowering or hoisting gear of elevating movement on column；Also include atmosphere protection device; atmosphere protection device include the protective cover that is arranged between dummy electrode and crystallizer upper end face and can air inlet to the air inlet pipe in protective cover; it is characterized in that; protective cover upper end is fixedly connected on dummy electrode; protective cover is that gas impermeable material vertically flexible folding prepares when making dummy electrode descending, and protective cover can produce vertical folding shrinking.
So; when electroslag refining furnace is smelted; protective cover upper end is fixedly installed on dummy electrode; control to carry out atmosphere protection in protective gas enters into crystallizer by air inlet pipe before smelting; in smelting process, dummy electrode descending drive protective cover upper end is descending and protective cover lower end is drawn close; reduce protective cover inner space volume; the air pressure of the protective gas in protective cover can be stepped up so that with the carrying out smelted; preferably force molten metal liquid to flow down in crystallizer by this air pressure, improve efficiency.Protective cover upper end and dummy electrode linkage simultaneously, therefore dummy electrode length long slides on for protective cover upper end without arranging, dummy electrode lower end is prone to keep from molten electrode axiality, improves smelting stability and safety.It addition, to be fixed on dummy electrode motionless in protective cover upper end, flexible folding and dummy electrode by protective cover self are servo-actuated, and such protective cover upper end and dummy electrode are secure fit, and in high-temperature severe environment, structure is more stable, is more hardly damaged.Simultaneously; protective cover is positioned at above crystallizer can preferably be avoided smelting high temperature, extends the atmosphere protection device life-span, and protective cover can be given when smelting and provide certain protective gas positive pressure to crystallizer inside; it is beneficial to the carrying out smelted, improves smelting quality and efficiency.
As optimization; protective cover upper end is fixedly connected on dummy electrode by a upper retainer ring; upper Fixing shrink ring is connected on outside dummy electrode and bottom is the discoid connecting portion extended radially outwardly along dummy electrode; connecting portion lower surface and protective cover upper end are tightly connected; upper retainer ring top is the fixed part extended axially upward along dummy electrode; it is horizontally arranged with screw on fixed part and top screw is fixed on dummy electrode inwardly through screw, upper retainer ring is additionally provided with bleed passage.
So, upper retainer ring facilitates the installation of protective cover upper end to fix, quick and easy for installation, fixing reliable, and air in protective cover can be extruded from bleed passage, the beneficially formation of protective atmosphere by the bleed passage simultaneously arranged when protective gas is passed through.
As optimization, disappointing governor motion it is additionally provided with in upper retainer ring, described disappointing adjustment structure includes the regulation bolt that loses heart, lose heart and regulate bolt horizontally set and threaded engagement on the connecting portion of upper retainer ring, disappointing regulation bolt outer end is exposed to connecting portion outer surface and constitutes regulation handle, the regulation bolt that loses heart is inner rotatable and axial limiting coordinates on a regulating block being positioned within retainer ring, and regulating block the inner is positioned at bleed passage and regulating block can be displaced outwardly gradually closing bleed passage with the rotation of disappointing regulation bolt.
So; the regulation bolt that loses heart can be relied on to regulate the cross section size of bleed passage conveniently and efficiently; to regulate the size of air leakage amount; when making to smelt, after protective gas air inlet, in maintenance crystallizer, the size of positive air pressure is adjustable; so that this pressure can better adapt to smelting demand, improve metallurgical effect.Simultaneously after protective gas air inlet forms protection atmosphere in crystallizer, it is also possible to turn down the most in time and be even switched off bleed passage, to keep the protective gas atmosphere in crystallizer and protective gas positive pressure, and save protective gas consumption.
As optimization, sealing structure it is additionally provided with between upper retainer ring and dummy electrode, upper sealing structure includes that a protrusion is formed at the spacing annulus boss of dummy electrode outer surface, also includes the upper sealing ring being compressed between spacing annulus boss upper surface and upper retainer ring lower surface.
So, upper being tightly connected between retainer ring and dummy electrode of convenient realization, it is to avoid lose heart from junction.
As optimization, protective cover lower end is connected to crystallizer upper end face by a discoid lower fixed ring seals, and air inlet pipe is arranged in lower retainer ring.
So, the fixing connection that convenient protective cover lower end is set of lower retainer ring.
As optimization, the described inner position of crystallizer upper end face is provided with the limited block of inverted L-shaped, described lower retainer ring medial part card pressure is spacing in limited block, lower retainer ring lateral part leans on vertically arranged connecting bolt to run through and is connected to crystallizer upper end, and between lower retainer ring lower surface and crystallizer upper end face, pressure is provided with lower seal and realizes sealing.
So so that lower retainer ring is quick and easy for installation, reliable and good sealing effect is fixed.
As optimization, also including that protective gas preheating structure, protective gas preheating structure include protective gas preheating chamber, described air inlet pipe connects air inlet to reconnecting air inlet after protective gas preheating chamber preheating in protective cover.
So, enter back in crystallizer after protective gas preheating, it is to avoid the too low impact causing smelting reaction in crystallizer of protective gas temperature is fluctuated and affected smelting quality.Particularly protective gas is in usually compression is stored in storage tank, discharges rear gas volume and becomes and have greatly process absorb heat, drawing the heat contacting object consumingly, if entering directly in crystallizer without preheating, being easy for affecting metallurgical effect.
As optimization, also include the protective cover cooling structure for protective cover being realized cooling.This is owing to, in crystallizer smelting process, internal steam rises, and heat obtains protective cover; protective cover temperature can be quickly caused to raise; therefore cooling structure is set and carries out cooling and can preferably improve the protected effect to protective cover self, it is to avoid owing to temperature is too high and damage, extend protective cover service life.
As optimization; described protective cover includes internal layer cover body and outer layer cover body; described air inlet pipe is communicated between outer layer cover body and internal layer cover body; it is provided with gas outlet on described internal layer cover body and connects internal layer cover body; constituting protective gas preheating chamber between outer layer cover body and internal layer cover body, protective gas preheating chamber constitutes protective cover cooling structure after entering protective gas.
So, use very simple double-deck cover body structure, make it be simultaneously achieved above-mentioned charge heating and the double effects of protective cover cooling protection dexterously, do not add extra cooling source and pre-thermal source, dramatically saves on cost.The structure of the most double-deck cover body; make when, in smelting process, when having any layer cover body breakage, protective cover can continue to the gas shield atmosphere using and continuing in crystallizer; carry out mending-leakage after terminating to smelting again, drastically increase reliability and the safety of gas shield in smelting process.
As optimization, being provided with escape pipe in described gas outlet, escape pipe is positioned at inner side cover body lower position and crystallizer internal cavity is the most just arranged by escape pipe outgassing direction.
So, gas outlet is set up escape pipe to give vent to anger, it is possible to better ensure that to give vent to anger in outgassing direction lower section inwardly, improve atmosphere protection effect.
As optimizing further, escape pipe is arranged along the tangential direction of space middle circle between electrode and crystallizer internal cavity in the vertical projection of horizontal plane.So, the protective gas of entrance can flow downward along spatially spiral between electrode and crystallizer internal cavity, realizes atmosphere protection preferably arriving smelting position, improves atmosphere protection effect.
As optimizing further; being provided with one-way pressure valve in escape pipe, after accumulating certain gas pressure between outer layer cover body and internal layer cover body, the most unidirectional escape pipe of opening is given vent to anger; ensure to fill between outer layer cover body and internal layer cover body the quantity of gas, to ensure the cooling effect to protective cover.
As optimizing further, air inlet pipe and escape pipe are arranged at unilateral above crystallizer and are positioned at contrary direction.So escape pipe one side is arranged; being more favorable for the discharge of opposite side air, the beneficially foundation of protective gas atmosphere, air inlet pipe and escape pipe are positioned at contrary direction simultaneously; protective gas flow path between two-layer cover body can be extended, preferably improve the pre-heat effect to protective gas.
As optimizing further, described outer layer cover body upper end is additionally provided with the exhaust pipeline of belt switch valve and connects with the external world.So; exhaust pipeline can be first passed through by evacuating air in double casing body before being passed through protective gas; make double-deck cover body bonded to each other; it is then shut off switch valve; it is passed through protective gas again; make protective gas be packed into double casing body internal cavities, enter into from escape pipe again after forming certain pressure and in crystallizer, realize atmosphere protection.Thus can the most first fill full double casing body inner space when being passed through protective gas, protective gas pre-heat effect and the protective cover cooling effect of double-deck cover body have been better achieved.
In sum, the present invention has simple in construction, is hardly damaged, and atmosphere protection is stable, it is possible to increase smelt safety, improves the advantages such as metallurgical effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of separately protected cover part in Fig. 1.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings.
When being embodied as: as shown in Figure 1-2, a kind of electroslag refining furnace, including crystallizer 1, the column 2 that is vertically arranged to crystallizer side, column 2 is provided above horizontal cantilever 3, by terminal clamp, just crystallizer is provided with the dummy electrode 4 downwardly extended on horizontal cantilever 3, also includes for driving horizontal cantilever lowering or hoisting gear of elevating movement on column；Also include atmosphere protection device; protective cover 5 that atmosphere protection device includes being arranged between dummy electrode 4 and crystallizer 1 upper end face and can air inlet to the air inlet pipe 6 in protective cover 5; its feature is; protective cover 5 upper end is fixedly connected on dummy electrode 4; protective cover 5 prepares for gas impermeable material vertically flexible folding when making dummy electrode descending, and protective cover can produce vertical folding shrinking.During enforcement, described lowering or hoisting gear includes a leading screw 7 being vertically set up in parallel with column, and leading screw 7 is rotatably engaged and is arranged in the nut being fixed on horizontal cantilever 3, and leading screw 7 lower end is connected with lifting motor 8 by reductor；So it is capable of the elevating control to horizontal cantilever, and simple in construction, controls reliable and stable.During enforcement, air inlet pipe and inert gas source are connected to crystallizer and provide protective gas.During enforcement, protective cover uses and does not fire exotic material and make, and specifically can be preferably airtight asbestos cloth and obtain.
So; when electroslag refining furnace is smelted; protective cover upper end is fixedly installed on dummy electrode; control to carry out atmosphere protection in protective gas enters into crystallizer by air inlet pipe before smelting; in smelting process, dummy electrode descending drive protective cover upper end is descending and protective cover lower end is drawn close; reduce protective cover inner space volume; the air pressure of the protective gas in protective cover can be stepped up so that with the carrying out smelted; preferably force molten metal liquid to flow down in crystallizer by this air pressure, improve efficiency.Protective cover upper end and dummy electrode linkage simultaneously, therefore dummy electrode length long slides on for protective cover upper end without arranging, dummy electrode lower end is prone to keep from molten electrode axiality, improves smelting stability and safety.It addition, to be fixed on dummy electrode motionless in protective cover upper end, flexible folding and dummy electrode by protective cover self are servo-actuated, and such protective cover upper end and dummy electrode are secure fit, and in high-temperature severe environment, structure is more stable, is more hardly damaged.Simultaneously; protective cover is positioned at above crystallizer can preferably be avoided smelting high temperature, extends the atmosphere protection device life-span, and protective cover can be given when smelting and provide certain protective gas positive pressure to crystallizer inside; it is beneficial to the carrying out smelted, improves smelting quality and efficiency.
Wherein, protective cover 5 upper end is fixedly connected on dummy electrode 4 by a upper retainer ring 9; upper retainer ring 9 is socketed in outside dummy electrode and bottom is the discoid connecting portion extended radially outwardly along dummy electrode; connecting portion lower surface and protective cover upper end are tightly connected; upper retainer ring 9 top is the fixed part extended axially upward along dummy electrode; it is horizontally arranged with screw on fixed part and top screw is fixed on dummy electrode inwardly through screw, upper retainer ring is additionally provided with bleed passage 10.
So, upper retainer ring facilitates the installation of protective cover upper end to fix, quick and easy for installation, fixing reliable, and air in protective cover can be extruded from bleed passage, the beneficially formation of protective atmosphere by the bleed passage simultaneously arranged when protective gas is passed through.
Wherein, disappointing governor motion it is additionally provided with in upper retainer ring, described disappointing adjustment structure includes the regulation bolt 11 that loses heart, lose heart and regulate bolt 11 horizontally set and threaded engagement on the connecting portion of upper retainer ring, disappointing regulation bolt 11 outer end is exposed to connecting portion outer surface and constitutes regulation handle, the regulation bolt 11 that loses heart is inner rotatable and axial limiting coordinates on a regulating block being positioned within retainer ring 12, and regulating block 12 the inner is positioned at bleed passage 10 and regulating block can be displaced outwardly gradually closing bleed passage 10 with the rotation of disappointing regulation bolt.
So; the regulation bolt that loses heart can be relied on to regulate the cross section size of bleed passage conveniently and efficiently; to regulate the size of air leakage amount; when making to smelt, after protective gas air inlet, in maintenance crystallizer, the size of positive air pressure is adjustable; so that this pressure can better adapt to smelting demand, improve metallurgical effect.Simultaneously after protective gas air inlet forms protection atmosphere in crystallizer, it is also possible to turn down the most in time and be even switched off bleed passage, to keep the protective gas atmosphere in crystallizer and protective gas positive pressure, and save protective gas consumption.
Wherein, it is additionally provided with sealing structure between upper retainer ring 9 and dummy electrode 4, upper sealing structure includes that a protrusion is formed at the spacing annulus boss 13 of dummy electrode outer surface, also includes the upper sealing ring 14 being compressed between spacing annulus boss 13 upper surface and upper retainer ring 9 lower surface.During enforcement, upper sealing ring 14 preferably employs high-temperature flame-proof cotton and obtains increasing the service life.
So, upper being tightly connected between retainer ring and dummy electrode of convenient realization, it is to avoid lose heart from junction.
Wherein, protective cover 5 lower end is sealedly connected on crystallizer 1 upper end face by a discoid lower retainer ring 15, and air inlet pipe is arranged in lower retainer ring.
So, the fixing connection that convenient protective cover lower end is set of lower retainer ring.
Wherein, the inner position of described crystallizer 1 upper end face is provided with the limited block 16 of inverted L-shaped, described lower retainer ring 15 medial part card pressure is spacing in limited block 16, lower retainer ring 15 lateral part leans on vertically arranged connecting bolt 17 to run through and is connected to crystallizer upper end, and between lower retainer ring lower surface and crystallizer upper end face, pressure is provided with lower seal 18 and realizes sealing.
So so that lower retainer ring is quick and easy for installation, reliable and good sealing effect is fixed.During enforcement, lower seal 18 preferably employs high-temperature flame-proof cotton and obtains increasing the service life.
Wherein, also including that protective gas preheating structure, protective gas preheating structure include protective gas preheating chamber 19, described air inlet pipe 6 connects air inlet to reconnecting air inlet after protective gas preheating chamber 19 preheating in protective cover.
So, enter back in crystallizer after protective gas preheating, it is to avoid the too low impact causing smelting reaction in crystallizer of protective gas temperature is fluctuated and affected smelting quality.Particularly protective gas is in usually compression is stored in storage tank, discharges rear gas volume and becomes and have greatly process absorb heat, drawing the heat contacting object consumingly, if entering directly in crystallizer without preheating, being easy for affecting metallurgical effect.
Wherein, the protective cover cooling structure for protective cover being realized cooling is also included.This is owing to, in crystallizer smelting process, internal steam rises, and heat obtains protective cover; protective cover temperature can be quickly caused to raise; therefore cooling structure is set and carries out cooling and can preferably improve the protected effect to protective cover self, it is to avoid owing to temperature is too high and damage, extend protective cover service life.
Wherein, described protective cover includes internal layer cover body and outer layer cover body; described air inlet pipe is communicated between outer layer cover body and internal layer cover body; it is provided with gas outlet on described internal layer cover body and connects internal layer cover body; constituting protective gas preheating chamber between outer layer cover body and internal layer cover body, protective gas preheating chamber constitutes protective cover cooling structure after entering protective gas.
So, use very simple double-deck cover body structure, make it be simultaneously achieved above-mentioned charge heating and the double effects of protective cover cooling protection dexterously, do not add extra cooling source and pre-thermal source, dramatically saves on cost.The structure of the most double-deck cover body; make when, in smelting process, when having any layer cover body breakage, protective cover can continue to the gas shield atmosphere using and continuing in crystallizer; carry out mending-leakage after terminating to smelting again, drastically increase reliability and the safety of gas shield in smelting process.
Wherein, being provided with escape pipe 20 in described gas outlet, escape pipe 20 is positioned at inner side cover body lower position and crystallizer 1 inner chamber is the most just arranged by escape pipe outgassing direction.
So, gas outlet is set up escape pipe to give vent to anger, it is possible to better ensure that to give vent to anger in outgassing direction lower section inwardly, improve atmosphere protection effect.
Wherein, escape pipe 20 is arranged along the tangential direction of space middle circle between electrode and crystallizer internal cavity in the vertical projection of horizontal plane.So, the protective gas of entrance can flow downward along spatially spiral between electrode and crystallizer internal cavity, realizes atmosphere protection preferably arriving smelting position, improves atmosphere protection effect.
Wherein, being provided with one-way pressure valve in escape pipe 20, after accumulating certain gas pressure between outer layer cover body and internal layer cover body, the most unidirectional escape pipe of opening is given vent to anger; ensure to fill between outer layer cover body and internal layer cover body the quantity of gas, to ensure the cooling effect to protective cover.
Wherein, air inlet pipe 6 and escape pipe 20 are arranged at unilateral above crystallizer and are positioned at contrary direction.So escape pipe one side is arranged; being more favorable for the discharge of opposite side air, the beneficially foundation of protective gas atmosphere, air inlet pipe and escape pipe are positioned at contrary direction simultaneously; protective gas flow path between two-layer cover body can be extended, preferably improve the pre-heat effect to protective gas.
Wherein, described outer layer cover body upper end is additionally provided with the exhaust pipeline 21 of belt switch valve and connects with the external world.So; exhaust pipeline can be first passed through by evacuating air in double casing body before being passed through protective gas; make double-deck cover body bonded to each other; it is then shut off switch valve; it is passed through protective gas again; make protective gas be packed into double casing body internal cavities, enter into from escape pipe again after forming certain pressure and in crystallizer, realize atmosphere protection.Thus can the most first fill full double casing body inner space when being passed through protective gas, protective gas pre-heat effect and the protective cover cooling effect of double-deck cover body have been better achieved.
In sum, the present invention has simple in construction, is hardly damaged, and atmosphere protection is stable, it is possible to increase smelt safety, improves the advantages such as metallurgical effect.
Claims (10)
1. an electroslag refining furnace, including crystallizer, the column that is vertically arranged to crystallizer side, column is provided above horizontal cantilever, by terminal clamp, just crystallizer is provided with the dummy electrode downwardly extended on horizontal cantilever, also includes for driving horizontal cantilever lowering or hoisting gear of elevating movement on column；Also include atmosphere protection device; atmosphere protection device include the protective cover that is arranged between dummy electrode and crystallizer upper end face and can air inlet to the air inlet pipe in protective cover; it is characterized in that; protective cover upper end is fixedly connected on dummy electrode; protective cover is that gas impermeable material vertically flexible folding prepares when making dummy electrode descending, and protective cover can produce vertical folding shrinking.
2. electroslag refining furnace as claimed in claim 1; it is characterized in that; protective cover upper end is fixedly connected on dummy electrode by a upper retainer ring; upper Fixing shrink ring is connected on outside dummy electrode and bottom is the discoid connecting portion extended radially outwardly along dummy electrode; connecting portion lower surface and protective cover upper end are tightly connected; upper retainer ring top is the fixed part extended axially upward along dummy electrode; it is horizontally arranged with screw on fixed part and top screw is fixed on dummy electrode inwardly through screw, upper retainer ring is additionally provided with bleed passage.
3. electroslag refining furnace as claimed in claim 2, it is characterized in that, disappointing governor motion it is additionally provided with in upper retainer ring, described disappointing adjustment structure includes the regulation bolt that loses heart, lose heart and regulate bolt horizontally set and threaded engagement on the connecting portion of upper retainer ring, disappointing regulation bolt outer end is exposed to connecting portion outer surface and constitutes regulation hands handle, the regulation bolt that loses heart is inner rotatable and axial limiting coordinates on a regulating block being positioned within retainer ring, regulating block the inner is positioned at bleed passage and regulating block can be displaced outwardly gradually closing bleed passage with the rotation of disappointing regulation bolt.
4. electroslag refining furnace as claimed in claim 2, it is characterized in that, sealing structure it is additionally provided with between upper retainer ring and dummy electrode, upper sealing structure includes that a protrusion is formed at the spacing annulus boss of dummy electrode outer surface, also includes the upper sealing ring being compressed between spacing annulus boss upper surface and upper retainer ring lower surface.
5. electroslag refining furnace as claimed in claim 1, it is characterised in that protective cover lower end is connected to crystallizer upper end face by a discoid lower fixed ring seals, and air inlet pipe is arranged in lower retainer ring.
6. electroslag refining furnace as claimed in claim 5, it is characterized in that, the described inner position of crystallizer upper end face is provided with the limited block of inverted L-shaped, described lower retainer ring medial part card pressure is spacing in limited block, lower retainer ring lateral part leans on vertically arranged connecting bolt to run through and is connected to crystallizer upper end, and between lower retainer ring lower surface and crystallizer upper end face, pressure is provided with lower seal and realizes sealing.
7. electroslag refining furnace as claimed in claim 1; it is characterized in that; also including that protective gas preheating structure, protective gas preheating structure include protective gas preheating chamber, described air inlet pipe connects air inlet to reconnecting air inlet after protective gas preheating chamber preheating in protective cover.
8. electroslag refining furnace as claimed in claim 1, it is characterised in that also include the protective cover cooling structure for protective cover being realized cooling.
9. electroslag refining furnace as claimed in claim 1; it is characterized in that; described protective cover includes internal layer cover body and outer layer cover body; described air inlet pipe is communicated between outer layer cover body and internal layer cover body; it is provided with gas outlet on described internal layer cover body and connects internal layer cover body; constituting protective gas preheating chamber between outer layer cover body and internal layer cover body, protective gas preheating chamber constitutes protective cover cooling structure after entering protective gas.
10. electroslag refining furnace as claimed in claim 9, it is characterised in that be provided with escape pipe in described gas outlet, escape pipe is positioned at inner side cover body lower position and crystallizer internal cavity is the most just arranged by escape pipe outgassing direction.
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| CN201610410331.1A CN105861849B (en) | 2016-06-13 | 2016-06-13 | A kind of electroslag refining furnace |
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| CN201610410331.1A CN105861849B (en) | 2016-06-13 | 2016-06-13 | A kind of electroslag refining furnace |
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| CN105861849B CN105861849B (en) | 2018-07-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106111989A (en) * | 2016-08-18 | 2016-11-16 | 华南理工大学 | A kind of protective gas pre-heating mean printed for 3D and device |
| CN108971453A (en) * | 2018-09-25 | 2018-12-11 | 山西凯通源管业有限公司 | A kind of bimetal metallurgy combination composite seamless pipe pipe process units |
| CN111647756A (en) * | 2020-06-22 | 2020-09-11 | 北京钢研高纳科技股份有限公司 | False electrode for electroslag remelting furnace and self-adaptive centering method of false electrode for electroslag remelting furnace |
| 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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| CN203474873U (en) * | 2013-09-05 | 2014-03-12 | 通裕重工股份有限公司 | Protective atmosphere cover |
| CN104313342A (en) * | 2014-10-30 | 2015-01-28 | 重庆钢铁(集团)有限责任公司 | Metal electroslag remelting and smelting equipment |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203474873U (en) * | 2013-09-05 | 2014-03-12 | 通裕重工股份有限公司 | Protective atmosphere cover |
| CN104313342A (en) * | 2014-10-30 | 2015-01-28 | 重庆钢铁(集团)有限责任公司 | Metal electroslag remelting and smelting equipment |
| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106111989A (en) * | 2016-08-18 | 2016-11-16 | 华南理工大学 | A kind of protective gas pre-heating mean printed for 3D and device |
| CN108971453A (en) * | 2018-09-25 | 2018-12-11 | 山西凯通源管业有限公司 | A kind of bimetal metallurgy combination composite seamless pipe pipe process units |
| CN108971453B (en) * | 2018-09-25 | 2023-05-09 | 山西凯通源管业有限公司 | Bimetal metallurgy combined composite seamless pipe blank production device |
| CN111647756A (en) * | 2020-06-22 | 2020-09-11 | 北京钢研高纳科技股份有限公司 | False electrode for electroslag remelting furnace and self-adaptive centering method of false electrode for electroslag remelting furnace |
| CN111647756B (en) * | 2020-06-22 | 2021-10-15 | 北京钢研高纳科技股份有限公司 | False electrode for electroslag remelting furnace and self-adaptive centering method of false electrode for electroslag remelting furnace |
| 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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| CN105861849B (en) | 2018-07-27 |
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