CN113234937A - Simple and intensive argon protection equipment and method for electroslag furnace - Google Patents
Simple and intensive argon protection equipment and method for electroslag furnace Download PDFInfo
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- CN113234937A CN113234937A CN202110722436.1A CN202110722436A CN113234937A CN 113234937 A CN113234937 A CN 113234937A CN 202110722436 A CN202110722436 A CN 202110722436A CN 113234937 A CN113234937 A CN 113234937A
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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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- 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
- C22B9/006—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with use of an inert protective material including the use of an inert gas
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Abstract
本发明公开了一种电渣炉简易密集型氩气保护设备，用于电渣重熔过程中防止大气进入熔池渣面的氩气保护装置，包括置于结晶器上端面以及电渣炉的电极棒四周外侧的氩气保护罩，氩气保护罩上端面设置有套设在电极棒外侧可开合的密封板，密封板可与电极棒触碰来对结晶器内腔完全密封；且所述结晶器上端面与氩气保护罩下端面之间设置有绝缘层，绝缘层平铺在结晶器上端面上；与现有技术相比，对氩气保护罩与结晶器之间进行绝缘处理，则能够使密封板与电极棒外侧以接触的方式来对电极棒与氩气保护罩顶部之间的间隙完全密封，从而对结晶器空腔内进行简易密封，则导入结晶器内的氩气在氩气保护罩内形成密集型的氩气保护层，以提高结晶器内冶炼的品质。
The invention discloses a simple and intensive argon gas protection device for an electroslag furnace, which is used for preventing the atmosphere from entering the slag surface of the molten pool during the electroslag remelting process. The argon gas protective cover on the outer side of the electrode rod, the upper end face of the argon gas protective cover is provided with a sealing plate which can be opened and closed on the outside of the electrode rod, and the sealing plate can touch the electrode rod to completely seal the inner cavity of the mold; An insulating layer is arranged between the upper end face of the crystallizer and the lower end face of the argon protective cover, and the insulating layer is laid flat on the upper end face of the crystallizer; compared with the prior art, insulation treatment is performed between the argon gas protective cover and the crystallizer , the gap between the electrode rod and the top of the argon shield can be completely sealed by contacting the sealing plate with the outside of the electrode rod, so that the cavity of the mold can be simply sealed, and the argon gas introduced into the mold A dense argon protective layer is formed in the argon protective cover to improve the quality of smelting in the mold.
Description
Technical Field
The invention relates to the technical field of electroslag furnaces, in particular to simple and intensive argon protection equipment and a method thereof for an electroslag furnace.
Background
Electroslag remelting is a terminal smelting process for preparing high-end materials by secondary refining. The method is characterized in that a slag heat-resistant melting and refining consumable electrode generated when a slag pool passes through current is used for melting metal layer by layer to separate from a parent body to form molten drops, and the molten drops pass through the slag pool after falling off from the parent body and fall into a flat metal molten pool to be solidified into an electroslag ingot in a water-cooled crystallizer. However, in the process of electroslag remelting refining, if an intensive argon protective layer cannot be formed on the high-temperature and hot slag surface in the inner cavity of the crystallizer, air can contact with the slag surface, so that the contents of oxygen, hydrogen and nitrogen in steel are increased, and the electroslag remelting refining effect is reduced.
In order to solve the above problems, patent document CN202020088490.6 discloses an atmosphere protection device for electroslag remelting, which can reduce the contact between the slag surface and the air from the source, and introduce argon gas into the crystallizer to improve the cleanliness of the product, and the sealing effect is relatively good. However, the protection cover plate and the opening and closing cover plate described in the patent are not insulated from the crystallizer, and the inner circle of the opening and closing cover plate is attached to the electrode rod or the false electrode welded on the electrode rod by using refractory cotton under the action of the electronic fine adjustment structure, so that the protection cover plate and the opening and closing cover plate are seemingly sealed easily, but have no industrial application feasibility. Because the micro-electronic control is not suitable for being applied in the high-temperature hot environment in the electroslag remelting process, if the micro-electronic control fails, the protective cover plate touches the electrode bar or the false electrode; the burrs on the electrode rod can easily puncture refractory cotton for sealing, so that the crystallizer is electrified in any situation, and serious potential safety hazards are brought; if a non-contact safety gap is left between the protective cover plate and the crystallizer and between the opening and closing cover plate and the crystallizer, the protection effect of argon in the crystallizer is poor, and the refining quality of electroslag steel in the crystallizer is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide simple and intensive argon protection equipment for an electroslag furnace, so as to solve the problem that in the prior art, because insulation treatment is not carried out between a crystallizer and a protection cover plate and between the crystallizer and an opening and closing cover plate, potential safety hazards are easily caused or intensive argon protection cannot be formed in the crystallizer.
In order to achieve the purpose, the invention adopts the following technical scheme: a simple and intensive argon protection device of an electroslag furnace is used for preventing atmosphere from entering a slag surface of a molten pool in an electroslag remelting process, and comprises an argon protection cover which is arranged on the upper end surface of a crystallizer and on the outer side of the periphery of an electrode bar of the electroslag furnace, wherein a sealing plate which is sleeved on the outer side of the electrode bar and can be opened and closed is arranged on the upper end surface of the argon protection cover, and the sealing plate can touch the electrode bar to seal an inner cavity of the crystallizer;
and an insulating layer is arranged between the upper end face of the crystallizer and the lower end face of the argon protective cover, and the insulating layer is flatly paved on the upper end face of the crystallizer.
Compared with the prior art, the invention has the following beneficial effects:
through being provided with the insulating layer between crystallizer up end and argon gas safety cover, carry out insulation treatment between argon gas safety cover and the crystallizer, then can make the closing plate and the electrode bar outside come to seal the space at electrode bar or electrode bar's false electrode and argon gas safety cover inner chamber top with the mode of contact, thereby carry out simple and easy sealing in the crystallizer cavity, then the argon gas of leading-in the crystallizer forms intensive argon gas protective layer in the argon gas safety cover, with the refined quality of electroslag steel in the improvement crystallizer.
Further, the insulating layer is formed by stacking high-temperature-resistant and fireproof materials.
Further, the sealing plate is two semi-annular sealing plates which are in contact connection with the upper end face of the argon gas protection cover, and the ends of the two semi-annular sealing plates are connected in a one-to-one correspondence mode and then sleeved on the electrode bar or welded around the outer side of the false electrode of the electrode bar.
And the argon gas guide component comprises an air inlet pipe positioned above the sealing plate and a plurality of air guide branch pipes communicated with the air outlet of the air inlet pipe, the air guide branch pipes extend into the crystallizer and keep a certain height with the slag surface in the crystallizer, and the air guide branch pipes are circumferentially distributed in a gap between the electrode rod and the inner wall of the crystallizer along the outer side of the electrode rod.
Furthermore, a plurality of atomizing nozzles are arranged on one section of each air guide branch pipe arranged in the crystallizer at intervals along the axial direction of the section.
Furthermore, a plurality of high-temperature resistant porcelain beads are sleeved on the outer wall of each air guide branch pipe along the axial direction of the air guide branch pipe, and the outer wall of the atomizing nozzle is provided with an insulating package.
In order to achieve the purpose and expand the achievement, the invention also adopts the following technical scheme:
a simple protection method for electroslag furnace is characterized by that the crystallizer and argon protecting cover are insulated from each other, the sealing plate is used to contact electrode bar to seal the inner cavities of crystallizer and argon protecting cover, and an intensive argon protecting layer is formed in the argon protecting cover by the inner cavity over the slag surface in crystallizer.
The invention can insulate by the insulating layer (such as an insulator made of ceramic material) arranged between the argon protective cover and the crystallizer, and can lead the sealing plate to be contacted with the electrode bar or the false electrode, thereby realizing the effective sealing of the inner cavities of the crystallizer and the argon protective cover by a simple structure, avoiding the huge cost caused by the totally-enclosed argon device transformed from an electroslag furnace in the industrial application process, obviously improving the electroslag remelting function and simultaneously reducing the investment cost of enterprises for transforming high-end refining equipment.
Drawings
FIG. 1 is a first schematic diagram of an embodiment of the present invention;
FIG. 2 is a second schematic diagram of an embodiment of the present invention;
FIG. 3 is a partial top view of an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: crystallizer 1, electrode bar 2, argon gas safety cover 3, insulating layer 5, semi-annular closing plate 6, air guide branch pipe 7, atomizer 8. With reference to fig. 1 and 2, an embodiment of the invention provides simple and intensive argon protection equipment for an electroslag furnace, which is an argon protection device for preventing atmosphere from entering a slag surface of a molten pool in an electroslag remelting process, and comprises an argon protection cover 3 arranged at the top of a crystallizer 1 and on the outer side of the periphery of an electrode rod 2 of the electroslag furnace, wherein a sealing plate which is sleeved on the outer side of the electrode rod 2 and can be opened and closed is arranged on the upper end surface of the argon protection cover 3, and the sealing plate is in contact with the outer side of the electrode rod 2 to realize simple sealing on inner cavities of the crystallizer 1 and the argon; and an insulating layer 5 is arranged between the top end face of the crystallizer 1 and the lower end face of the argon protective cover 3, and the insulating layer 5 is tiled on the upper end face of the crystallizer 1.
Through being provided with insulating layer 5 between 1 top of crystallizer and argon gas safety cover 3, carry out insulation treatment between argon gas safety cover 3 and the crystallizer 1, then can make the closing plate and 2 outsides of electrode bar come to seal the space between electrode bar 2 and the 3 tops of argon gas safety cover with the mode of contact, thereby carry out simple and easy sealing in the cavity of crystallizer 1, then the argon gas of leading-in crystallizer 1 forms intensive argon gas protective layer in argon gas safety cover 3, with the refined quality of electroslag steel in improving crystallizer 1.
As shown in fig. 1 and fig. 2, according to another embodiment of the invention, the simple and intensive argon protection equipment for an electroslag furnace further comprises an insulating layer 5 which is optimized, wherein the insulating layer 5 is formed by stacking high-temperature resistant refractory materials, such as ceramic tiles, and the ceramic tiles are relatively hard in texture and have sufficient insulating capacity, so that the insulating requirement between the crystallizer 1 and the argon protection cover 3 can be met; and meanwhile, the material is easy to obtain, and the argon shield 3 has enough strength to have better supporting capacity.
As shown in fig. 1 and 2, according to another embodiment of the invention, the simple and intensive argon protection equipment for an electroslag furnace further comprises the structural optimization of the sealing plate, the sealing plate which can be opened and closed is adopted in the invention as the two semi-annular sealing plates 6 which are in contact connection with the upper end surface of the argon protection cover 3, and the ends of the two semi-annular sealing plates 6 are correspondingly connected one by one and then sleeved on the periphery of the outer side of the electrode rod 2; the sealing plate can also be welded on the periphery of the outer side of the false electrode of the electrode bar 2; and two semicircular sealing plates 6 are provided with a U-shaped opening, so that an air guide branch pipe 7 of argon can be conveniently inserted.
Form the closing plate after splicing through two semi-annular closing plates 6, carry out reasonable design according to the structure of electrode bar 2, be convenient for seal the clearance between electrode bar 2 and the 3 up end of argon gas safety cover.
The electrode rod 2 comprises a false electrode with a small upper part and a big lower part and an electrode rod main body, and the position of the electrode rod 2 in the axial direction in the crystallizer 1 can be adjusted according to the actual situation; when the dummy electrode or the electrode bar main body is matched with the sealing plate, the size of the hole formed on the inner sides of the two semicircular sealing plates 6 can be adjusted according to the diameter of the dummy electrode or the electrode bar main body, so that the gap between the electrode bar 2 and the upper end face of the argon protection cover 3 is sealed; specifically, two pairs of different two semi-annular sealing plates 6 can be selected, the two semi-annular sealing plates 6 in each pair form sealing plates with different apertures to be respectively matched with the false electrode or the electrode rod main body, and replacement operation can be performed manually.
As shown in fig. 1, 2 and 3, according to another embodiment of the invention, the simple and dense argon protection device for an electroslag furnace further comprises an argon gas introduction assembly, the argon gas introduction assembly comprises an air inlet pipe located above the sealing plate and a plurality of air guide branch pipes 7 communicated with exhaust ports of the air inlet pipe, the plurality of air guide branch pipes 7 extend into the crystallizer 1, a slag surface in the crystallizer 1 keeps a certain height, and meanwhile, the plurality of air guide branch pipes 7 are further circumferentially distributed in a gap between the electrode rod 2 and the inner wall of the crystallizer 1 along the outer side of the electrode rod 2.
The argon is introduced into the plurality of air guide branch pipes 7 through the air inlet pipe, the argon is distributed along the circumferential direction of the inner side of the crystallizer 1 after entering the crystallizer 1 through the plurality of air guide branch pipes 7, and the plurality of air guide branch pipes 7 are distributed within the arc length of 180 degrees in the embodiment, so that the compactness of an argon protection layer formed in the crystallizer 1 is further improved. And a plurality of air guide branch pipes 7 are arranged in the area close to the circumference of the electrode rod 2 and keep a certain distance with the inner wall of the crystallizer 1.
The plurality of gas guide branch pipes 7 extend into the crystallizer 1 after freely passing through U-shaped ports on the corresponding semi-annular sealing plate 6.
Meanwhile, each gas guide branch pipe 7 is arranged on a section of the slag surface in the crystallizer 1 at a fixed interval and is provided with a plurality of atomizing nozzles 8 at intervals along the axial direction; argon is uniformly sprayed into the crystallizer 1 through the plurality of atomizing nozzles 8, and the argon is uniformly distributed along the axial direction in the crystallizer 1, so that the compactness of an argon protective layer formed in the crystallizer 1 is further improved.
And an insulating layer is sleeved or coated on the outer wall of each atomizing nozzle 8.
The lower end of each air guide branch pipe 7 keeps a certain distance from the slag pool in the crystallizer 1, and the air guide branch pipes 7 and the atomizing nozzles 8 on the air guide branch pipes 7 are damaged due to the high temperature of the slag pool.
In this embodiment, the number of the atomizing nozzles 8 mounted on each air guiding branch pipe 7 is 3, and a lifting structure is arranged on the air inlet pipe, and the lifting structure can be automatically lifted or manually lifted so as to adjust the position of the nozzles.
The temperature of the slag surface in the crystallizer 1 is higher and can reach about 1720 ℃; in order to protect the air guide branch pipes 7, a plurality of high-temperature resistant ceramic beads are sleeved on the outer wall of each air guide branch pipe 7 along the axial direction of the air guide branch pipe; the high-temperature resistant porcelain beads prevent the air guide branch pipe 7 from accidentally touching the inner wall of the crystallizer 1, insulate the air guide branch pipe 7 and prevent the argon protective cover 3 and the sealing plate from being insulated from the crystallizer 1; and high-temperature-resistant porcelain beads are used for heat insulation so as to prolong the service life of the air guide branch pipe 7.
The invention also provides a simple protection method of the electroslag furnace, wherein the crystallizer 1 and the argon protection cover 3 are insulated, the crystallizer 1 and the argon protection cover 3 are sealed in a mode that a sealing plate can touch the electrode bar 2, and an intensive argon protection layer formed by an inner cavity above the slag surface in the crystallizer 1 is formed in the argon protection cover 3.
An insulating layer 5 is arranged between the top of the crystallizer 1 and an argon protection cover 3, the argon protection cover 3 and the crystallizer 1 are subjected to insulating treatment, a sealing object is adopted to completely seal the cavity of the crystallizer 1 in a mode of contacting with an electrode rod 2, and an intensive argon protection layer arranged above the interior of the crystallizer 1 is formed in the argon protection cover 3, so that the smelting quality in the crystallizer 1 is improved; meanwhile, the problem that the fully-sealed argon protection electroslag furnace needs heavy construction and high investment is solved, and the simple and intensive argon protection new era of the electroslag furnace which can be comprehensively applied in industry is realized.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. A simple intensive argon protection device of an electroslag furnace is used for preventing atmosphere from entering a slag surface of a molten pool in an electroslag remelting process, and is characterized by comprising an argon protection cover which is arranged on the upper end surface of a crystallizer and on the outer side of the periphery of an electrode rod of the electroslag furnace, wherein a sealing plate which is sleeved on the outer side of the electrode rod and can be opened and closed is arranged on the upper end surface of the argon protection cover, and the sealing plate can touch the electrode rod to seal the inner cavity of the crystallizer;
and an insulating layer is arranged between the upper end face of the crystallizer and the lower end face of the argon protective cover, and the insulating layer is flatly paved on the upper end face of the crystallizer.
2. The simple and intensive argon protection device of an electroslag furnace according to claim 1, which is characterized in that: the insulating layer is formed by stacking high-temperature-resistant and fireproof materials.
3. The simple and intensive argon protection device of an electroslag furnace according to claim 1, which is characterized in that: the sealing plate is two semi-annular sealing plates which are in contact connection with the upper end face of the argon protection cover, and the ends of the two semi-annular sealing plates are connected in a one-to-one correspondence mode and then sleeved on the electrode bar or welded around the outer side of a false electrode of the electrode bar.
4. The electroslag furnace simple and intensive argon protection equipment as claimed in any one of claims 1-3, wherein: the argon gas guide assembly comprises an air inlet pipe positioned above the sealing plate and a plurality of air guide branch pipes communicated with the air outlet of the air inlet pipe, the air guide branch pipes extend into the crystallizer and keep a certain height with the slag surface in the crystallizer, and the air guide branch pipes are circumferentially distributed in a gap between the electrode rod and the inner wall of the crystallizer along the outer side of the electrode rod.
5. The simple and intensive argon protection device of an electroslag furnace according to claim 4, which is characterized in that: each air guide branch pipe is arranged on a section of fixed distance of the slag surface in the crystallizer and is provided with a plurality of atomizing nozzles at intervals along the axial direction.
6. The simple and intensive argon protection device of an electroslag furnace according to claim 5, which is characterized in that: each air guide branch pipe is sleeved with a plurality of high-temperature resistant porcelain beads along the axial direction, and the outer wall of the atomizing nozzle is provided with an insulating package.
7. A simple protection method for an electroslag furnace is characterized in that a crystallizer and an argon protection cover are insulated, inner cavities of the crystallizer and the argon protection cover are sealed in a mode that a sealing plate can touch an electrode bar, and an intensive argon protection layer is formed in the argon protection cover by an inner cavity above a slag surface in the crystallizer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110722436.1A CN113234937A (en) | 2021-06-28 | 2021-06-28 | Simple and intensive argon protection equipment and method for electroslag furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110722436.1A CN113234937A (en) | 2021-06-28 | 2021-06-28 | Simple and intensive argon protection equipment and method for electroslag furnace |
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| CN113234937A true CN113234937A (en) | 2021-08-10 |
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| CN202110722436.1A Pending CN113234937A (en) | 2021-06-28 | 2021-06-28 | Simple and intensive argon protection equipment and method for electroslag furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113621825A (en) * | 2021-08-27 | 2021-11-09 | 安徽工业大学 | A consumable protection device and electroslag remelting system and method thereof |
| CN115044775A (en) * | 2022-05-23 | 2022-09-13 | 大冶特殊钢有限公司 | Electroslag furnace |
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| JPH07224332A (en) * | 1994-02-15 | 1995-08-22 | Hitachi Metals Ltd | Method and device for shielding from atmosphere in electroslag remelting |
| CN201962334U (en) * | 2010-12-27 | 2011-09-07 | 中原特钢股份有限公司 | Gas protecting device for re-smelting electric slag |
| CN204401083U (en) * | 2014-12-11 | 2015-06-17 | 中原特钢股份有限公司 | A kind of esr gas shield cover |
| CN204918713U (en) * | 2015-08-10 | 2015-12-30 | 中原特钢股份有限公司 | A electroslag gas blowing device for electroslag |
| CN215050604U (en) * | 2021-06-28 | 2021-12-07 | 重庆金凯特殊钢制品有限公司 | Simple and easy intensive argon protection equipment of electroslag furnace |
-
2021
- 2021-06-28 CN CN202110722436.1A patent/CN113234937A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07224332A (en) * | 1994-02-15 | 1995-08-22 | Hitachi Metals Ltd | Method and device for shielding from atmosphere in electroslag remelting |
| CN201962334U (en) * | 2010-12-27 | 2011-09-07 | 中原特钢股份有限公司 | Gas protecting device for re-smelting electric slag |
| CN204401083U (en) * | 2014-12-11 | 2015-06-17 | 中原特钢股份有限公司 | A kind of esr gas shield cover |
| CN204918713U (en) * | 2015-08-10 | 2015-12-30 | 中原特钢股份有限公司 | A electroslag gas blowing device for electroslag |
| CN215050604U (en) * | 2021-06-28 | 2021-12-07 | 重庆金凯特殊钢制品有限公司 | Simple and easy intensive argon protection equipment of electroslag furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113621825A (en) * | 2021-08-27 | 2021-11-09 | 安徽工业大学 | A consumable protection device and electroslag remelting system and method thereof |
| CN113621825B (en) * | 2021-08-27 | 2022-06-14 | 安徽工业大学 | A consumable protection device and electroslag remelting system and method thereof |
| CN115044775A (en) * | 2022-05-23 | 2022-09-13 | 大冶特殊钢有限公司 | Electroslag furnace |
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Application publication date: 20210810 |