CN217733228U - Electroslag furnace - Google Patents

Abstract

An electroslag furnace comprises a furnace body, wherein a hearth opening for loading a consumable electrode is formed above the furnace body, and a hearth opening platform is arranged around the hearth opening; the device also comprises a protective cover and a dust hood; the protective cover is of an annular structure, is arranged on the hearth port platform and is in insulation fit with the furnace body, and is used for covering the hearth port; the dust excluding hood is arranged above the protective cover. The utility model discloses can let in inert gas such as argon gas or nitrogen gas through the safety cover and protect, reduce electrode surface oxidation to oxygenation in the reduction steel. The utility model solves the problem of consumable electrode oxidation in the use process of the electroslag furnace.

Description

Electroslag furnace

Technical Field

The utility model belongs to the technical field of metal smelting equipment, more specifically says, in particular to electroslag furnace.

Background

The electroslag remelting technology is a method for smelting by using resistance heat generated when current passes through slag as a heat source, and the electroslag remelting can improve the purity of metal and improve ingot casting crystallization.

In the prior art, a slag furnace used for electroslag remelting is simple in structure, one end of a consumable electrode is inserted into a hearth of the electroslag furnace, the other end of the consumable electrode is exposed in air, and the hearth of the electroslag furnace is also of an open structure, so that the consumable electrode is easily oxidized, and the oxygen content of an ingot is increased.

The traditional electroslag GCr15 bearing steel has no requirement on oxygen content, so that the conventional common electroslag furnace can normally smelt (the oxygen content in the steel is between 22 and 30 ppm), but with the implementation of a new standard of the electroslag GCr15 bearing steel, the oxygen content is required to be less than or equal to 20ppm, and under the new standard, the normal smelting of the existing conventional electroslag furnace can not meet the requirement of the new standard. Under the new standard, derive a new electroslag furnace who is equipped with the safety cover additional, this kind of new electroslag furnace has installed a safety cover that can cover the consumable electrode completely above furnace, and the electroslag furnace of new construction can effectively reduce the oxidation condition of consumable electrode, can't thoroughly solve the oxidation condition of consumable electrode yet, moreover, installs the complexity that the safety cover also can greatly increase the electroslag furnace structure additional.

SUMMERY OF THE UTILITY MODEL

In conclusion, how to solve the problem of oxidation of the consumable electrode in the use process of the electroslag furnace becomes a problem to be solved urgently by the technical personnel in the field.

In order to solve the problems, the utility model provides

Specifically, the technical scheme of the utility model as follows:

an electroslag furnace comprises a furnace body, wherein a hearth opening for loading a consumable electrode is formed above the furnace body, and a hearth opening platform is arranged around the hearth opening;

the device also comprises a protective cover and a dust hood;

the protective cover is of an annular structure, is arranged on the hearth port platform and is in insulation fit with the furnace body, and is used for covering the hearth port;

the dust excluding hood set up in the top of safety cover.

Preferably, in the utility model provides an in the electroslag furnace, in the side of going up of safety cover is provided with the baffle, the baffle is provided with the baffle opening, the baffle can clamp in from consuming electrode, be used for sealing the safety cover with clearance between the consumable electrode.

Preferably, in the electroslag furnace provided by the utility model, the baffle is including two at least baffle units, and is whole the baffle unit splices into the baffle, wherein two at least the baffle with the side of going up of safety cover is articulated, is used for adjusting baffle open-ended opening.

Preferably, in the utility model provides an electroslag furnace, the safety cover is including top panel and lower panel, down the panel with hearth mouth platform insulation formula contact, the top panel with the lower panel separates to set up and is formed with installation space, the gas ring set up in the installation space.

Preferably, in the electroslag furnace provided by the present invention, the upper panel is an annular plate, the lower panel is an annular plate, a protective cover inner side surface is arranged between the inner edges of the upper panel and the lower panel, and a protective cover outer side surface is arranged between the outer edges of the upper panel and the lower panel; the air nozzle is of a straight pipe structure, one end of the air nozzle is connected with the gas ring, and the other end of the air nozzle penetrates through the inner side face of the protective cover.

Preferably, in the electroslag furnace provided by the present invention, the gas nozzle is horizontally arranged.

Preferably, in the electroslag furnace provided by the utility model, in the upper panel with be provided with the welt down between the panel, the welt with the upper panel and the panel sets up perpendicularly down, the welt with the upper panel and the diameter of panel sets up with the face down, the welt is provided with a plurality ofly, and is whole the welt winds the centre of a circle equidistant setting of upper panel.

Preferably, in the electroslag furnace provided by the utility model, the lining plate is of a wedge-shaped flat plate structure; the topside of welt for the horizontal edge and for long limit and with top panel fixed connection, the base of welt for the horizontal edge and for the minor face and with bottom panel fixed connection, the outside limit of welt is the hypotenuse, the inboard edge of welt be vertical limit and with the top panel and the inner edge of panel flushes down.

Preferably, in the electroslag furnace provided by the utility model, the upper panel is made of metal; the lower panel is made of metal; the lining plate is made of metal; the partition plate is made of metal; the gas ring is made of metal; the air nozzle is made of metal.

Preferably, in the electroslag furnace provided by the present invention, the metal is 304 stainless steel.

Preferably, in the electroslag furnace provided by the present invention, the inert gas is argon.

The beneficial effects of the utility model are as follows:

the utility model provides an electroslag furnace, which comprises a furnace body, wherein a hearth opening for loading a consumable electrode is arranged above the furnace body, and a hearth opening platform is arranged around the hearth opening; the device also comprises a protective cover and a dust hood; the protective cover is of an annular structure, is arranged on the hearth port platform and is in insulation fit with the furnace body, and is used for covering the hearth port; the dust excluding hood is arranged above the protective hood. The utility model provides an after the electroslag furnace drops into actual operation, consumable electrode when the remelting, can spout argon gas to the crystallizer in the upper shed, make the consumable electrode surface between slag bath face to the safety cover receive argon gas protection, slow down its surface oxidation, reduce oxygenation in to the steel. Through the structure design, the utility model discloses can let in inert gas such as argon gas or nitrogen gas through the safety cover and protect, when consumable electrode electroslag is remelted, cover consumable electrode (high temperature zone) under the argon protection between slag pool face to gaseous safety cover, reduce electrode surface oxidation to oxygenation in the reduction steel. The utility model solves the problem of consumable electrode oxidation in the use process of the electroslag furnace.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an electroslag furnace in the embodiment of the present invention.

In fig. 1, the correspondence between the component names and the reference numerals is:

the furnace comprises a furnace body 1, a consumable electrode 2, a protective cover 3, a dust hood 4, a gas ring 5, a gas nozzle 6, a partition plate 7 and a lining plate 8.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

In addition, in the description of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description of the present invention and does not require that the present invention must be constructed and operated in a specific orientation, and thus, cannot be construed as limiting the present invention. The terms "connected" and "connected" used in the present invention should be understood broadly, and may be, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.

Referring to fig. 1, fig. 1 is a schematic diagram of an overall structure of an electroslag furnace in an embodiment of the present invention.

The utility model provides an electroslag furnace the utility model discloses in, this electroslag furnace's concrete structure as follows: the furnace comprises a furnace body 1, wherein the furnace body 1 adopts a straight cylinder type furnace body structure, a cooling water cavity is arranged on the side wall of the furnace body 1, cooling water enters the cooling water cavity from the lower part of the furnace body 1 and is output from the upper part, the furnace body 1 is provided with a hearth, a hearth opening for loading a consumable electrode 2 is arranged above the furnace body 1, the consumable electrode 2 is clamped and electrified by an electrode clamping device, a liquid metal molten pool is arranged in the hearth (generally, the middle part of the hearth), one end of the consumable electrode 2 is clamped and fixed by the electrode clamping device, the other end of the consumable electrode 2 is inserted into the hearth from the hearth opening and is embedded into the slag pool, the bottom of the furnace body 1 is electrified simultaneously, the slag pool (slag) emits joule heat, the ends of the consumable electrode are melted layer by layer, molten metal is gathered into liquid drops, the liquid metal molten pool penetrates through the slag pool to form a liquid metal molten pool, and the molten pool gradually solidifies from bottom to top to form a steel ingot.

In the prior art, the opening degree of a hearth opening arranged above an electroslag furnace is large (the hearth opening is of a circular opening structure, and the diameter of the hearth opening is large), so that a consumable electrode can be conveniently inserted into a hearth.

In order to reduce the content of oxygen element in the steel ingot, the utility model discloses based on above-mentioned electroslag furnace, carried out following optimal design to its structure:

1. for electroslag furnaces.

Surround the furnace mouth and be provided with furnace mouth platform, furnace mouth platform is used for installing safety cover 3 (the utility model discloses in be used for sealing the device in gap between furnace mouth and the consumable electrode 2), furnace mouth platform can be planar structure, also can be for domatic structure, the bottom surface of safety cover 3 is used for contacting with furnace mouth platform, the bottom surface shape and the furnace mouth platform shape of safety cover 3 coincide, be used for improving the adaptation degree between safety cover 3 and the furnace mouth platform, thereby improve the gas tightness of safety cover 3 installation on furnace body 1, avoid inert gas to leak, can also reduce thermal loss in the furnace simultaneously.

2. For the protective cover 3.

The safety cover 3 is the utility model discloses in realize the device that the furnace mouth seals (mainly be under the state that consumable electrode 2 inserted furnace in from the furnace mouth, seal between consumable electrode 2 and the furnace mouth), its aim at founds an enclosure space in furnace, and can release inert gas in this space, be used for forming an inert gas environment, make the part (high temperature part) that consumable electrode 2 is located furnace, if there is oxygen, then very easy by the oxidation, thereby increase the oxygen element content in the steel ingot) and keep apart with oxygen, thereby avoid consumable electrode 2 to appear by the condition of oxidation, the purpose of oxygen element content in the steel ingot has been reached to the reduction.

Specifically, the protective cover 3 is an annular structure, preferably a circular ring structure, the outer edge of the protective cover 3 is circular, the inner edge of the protective cover 3 is circular, and the diameter of the inner edge of the protective cover 3 should be smaller than the diameter of the hearth opening and not larger than the diameter of the consumable electrode 2. The protective cover 3 is arranged on the hearth opening platform and is in insulation fit with the furnace body 1, so that the part of the protective cover 3, which is used for being in contact with the hearth opening platform, is required to bear high temperature (the temperature of the hearth opening is higher) and have certain insulation property. In an embodiment of the present invention, the present invention may be configured with a ceramic layer on the bottom surface (the portion for contacting with the hearth opening) of the protective cover 3, or may be configured with an insulating layer having a certain strength and high temperature resistance, such as a clay layer, on the hearth opening platform.

The protective cover 3 is used for covering the hearth opening, a gas ring 5 used for conveying inert gas is arranged in the protective cover 3, and the gas ring 5 is an annular structure which is arranged in the protective cover 3 and is formed by a high-temperature resistant pipeline. The gas ring 5 is provided with a gas nozzle 6, and the gas nozzle 6 extends towards the hearth opening direction and penetrates through the protective cover 3 for conveying inert gas to the interior of the furnace body 1 so as to realize the isolation of the part of the consumable electrode 2 in the furnace body 1 from oxygen. The utility model discloses an among the embodiment, gas ring 5 all adopts nonrust steel pipe with air nozzle 6, and gas ring 5 makes a ring structure through nonrust steel pipe, sets up a plurality of hole structures at the medial surface of gas ring 5 (the medial surface of ring), and air nozzle 6 adopts straight pipe structure, and the one end of air nozzle 6 welds the hole structure on the pneumatolization to realize the fixed and intercommunication of air nozzle 6 on gas ring 5, simultaneously the utility model discloses still be connected with an inert gas coupling at the lateral surface of gas ring 5, be used for being connected with the air supply, the air supply just can spray furnace inside through air nozzle 6 evenly like this, forms an inert gas environment in furnace.

To consumable electrode 2, its diameter has certain change, simultaneously, in order to make things convenient for consumable electrode 2 to insert furnace in, the utility model provides a safety cover 3, its inner ring diameter should be greater than consumable electrode 2's diameter, so can cause inert gas's leakage. In order to reduce the leakage loss of the inert gas, the utility model discloses a baffle 7 structure has been set up on protecting cover 3 very much.

Specifically, the partition plate 7 is disposed on the upper side surface of the protective cover 3, the partition plate 7 is provided with a partition plate opening (the opening degree of the partition plate opening is adjustable by the structural design of the partition plate 7), and the partition plate 7 can be clamped on the consumable electrode 2 to close the gap between the protective cover 3 and the consumable electrode 2.

Further, the separator structure is as follows: the partition plate 7 comprises at least two partition plate units, the partition plate units are of fan-shaped plate structures, all the partition plate units are spliced into the partition plate 7, and the at least two partition plate units are hinged with the upper side face of the protective cover 3 and used for adjusting openings of the partition plate openings. The utility model discloses an among the embodiment, the baffle unit is provided with two, and two baffle units all adopt fan-shaped structural design, can form a ring shape structure after two baffle unit tip docks. At the one end of baffle unit butt joint to with two baffle units after separating certain distances, articulate the baffle unit on the last side of safety cover 3 through structure such as bolt, be provided with the handle at the other end of baffle unit butt joint for two baffle units of manual separation or make two baffle units be close to each other. It should be noted that, the utility model discloses when rotating the baffle unit and making it be close to consumable electrode 2, should still avoid baffle unit and consumable electrode 2 to take place the contact, avoid the condition of electric leakage to appear. If in order to improve the gas tightness of baffle unit, then, the utility model discloses can set up the insulating layer of one deck high temperature resistance at the inboard edge of baffle unit, can contact with consumable electrode 2 after the baffle unit is closed, can further improve the sealed effect of baffle 7 like this.

In one embodiment of the present invention, the protective cover 3 has the following structure: the protective cover 3 comprises an upper panel and a lower panel (both adopting circular plate type structures), the lower side face of the lower panel is in insulated contact with the hearth opening platform, namely, an asbestos plate is paved between the lower panel of the protective cover and the hearth opening platform, and insulation is realized through the asbestos plate. The upper panel and the lower panel are arranged at intervals and form an installation space, and the gas ring 5 is arranged in the installation space.

Specifically, the upper panel is a ring-shaped panel (preferably circular ring-shaped), the lower panel is a ring-shaped panel (preferably circular ring-shaped, the size of which is the same as that of the upper panel), the inner side face of the protective cover 3 is arranged between the inner edges of the upper panel and the lower panel, and the outer side face of the protective cover 3 is arranged between the outer edges of the upper panel and the lower panel. When the upper panel, the lower panel, the inner side surface of the protective cover 3 and the outer side surface of the protective cover 3 are all made of stainless steel materials, the connecting parts of the upper panel, the lower panel, the inner side surface of the protective cover 3 and the outer side surface of the protective cover 3 are all fixedly connected in a welding mode. Set up gaseous ring 5 in protection cover 3, set up air nozzle 6 on gaseous ring 5, air nozzle 6 is the straight tube structure, and the one end and the gaseous ring 5 of air nozzle 6 are connected, and the other end of air nozzle 6 passes 3 medial surfaces of protection cover. Furthermore, the gas nozzles 6 are horizontally arranged, the gas ring 5 is provided with a plurality of gas nozzles 6, and all the gas nozzles 6 blow gas into the hearth in a parallel blowing mode.

The protective cover 3 comprises an upper panel and a lower panel, and a gas ring 5 is arranged between the upper panel and the lower panel at intervals. The safety cover 3 is placed on the hearth opening, is heated and can appear certain deformation, and to avoid being heated deformation and cause the structrual destruction of safety cover 3, the utility model discloses be provided with welt 8 between top panel and lower panel, welt 8 adopts sheet metal to make, and welt 8 sets up with the top panel is perpendicular, and welt 8 sets up with the diameter of top panel coplanar, and welt 8 is provided with a plurality ofly, and whole welt 8 sets up around the equidistant interval in the centre of a circle of top panel. Thus, when the protective cover 3 deforms, the liner plate 8 deforms under stress, so that the deformation of the upper panel and the lower panel is reduced, and the structural stability of the protective cover 3 is ensured to the maximum extent. Of course, the utility model discloses after being provided with welt 8, can also improve the structural strength of safety cover 3 for the effort that is heated the deformation can be overcome to self intensity of safety cover 3, thereby makes safety cover 3 wholly be heated and does not take place to warp.

Further, the lining plate 8 is in a wedge-shaped flat plate structure, and the lining plate 8 has the following two structural forms:

1. the top edge of the liner 8 is a horizontal edge, the bottom edge of the liner 8 is a horizontal edge, the top edge of the liner 8 is a long edge (longer length relative to the bottom of the liner), and the bottom edge of the liner 8 is a short edge (shorter length relative to the top edge of the liner). The lining plate 8 is arranged between the upper panel and the lower panel, the top edge of the lining plate 8 is fixedly connected with the upper panel, and the bottom edge of the lining plate 8 is fixedly connected with the lower panel. The outside limit of welt 8 is the hypotenuse (in the inner edge direction of the outer fringe finger upper panel of upper panel, the outside limit downward sloping of welt 8), and the inboard limit of welt 8 is vertical limit, and welt 8 is whole to be the wedge plate structure of a vertical setting. The inner edge of the lining plate 8 is flush with the inner edges of the upper panel and the lower panel. In this configuration, the backing plate 8 is equivalent to being inverted.

2. The top edge of the liner panel 8 is a horizontal edge, the bottom edge of the liner panel 8 is a horizontal edge, the top edge of the liner panel 8 is a short edge (shorter length relative to the bottom panel of the liner panel), and the bottom edge of the liner panel 8 is a long edge (longer length relative to the top edge of the liner panel). The lining plate 8 is arranged between the upper panel and the lower panel, the top edge of the lining plate 8 is fixedly connected with the upper panel, and the bottom edge of the lining plate 8 is fixedly connected with the lower panel. The outside limit of welt 8 is the hypotenuse (in the inner edge direction of the outer fringe finger upper panel of upper panel, the outside limit tilt up of welt 8), and the inboard limit of welt 8 is vertical limit, and welt 8 is whole to be the wedge plate structure of a vertical setting. The inner edge of the lining plate 8 is arranged flush with the inner edges of the upper panel and the lower panel. In this configuration, the backing plate 8 corresponds to a right position.

The lining plate 8 plays a supporting role for the upper panel, and the deformation of the upper panel can be reduced. Preferably, the material of the liner plate 8 is 304 stainless steel.

It should be noted that: the vertical edge of the lining plate 8 is close to the consumable electrode, and after the lower panel is insulated from the hearth opening platform, the lining plate and the consumable electrode do not need to be insulated.

In the utility model, the upper panel is made of metal; the lower panel is made of metal; the lining plate 8 is made of metal; the partition board 7 is made of metal; the gas ring 5 is made of metal; the air nozzle 6 is made of metal. Preferably, the metal used in the present invention is stainless steel.

Specifically, the inert gas used in the present invention is argon, and may be nitrogen.

The utility model provides an electroslag furnace specifically belongs to the special type of electroslag and smelts technical field, and this electroslag furnace is the electroslag equipment of remelting for the production technique of electroslag that can control conventional electroslag furnace production GCr15 bearing steel and O (oxygen element) content and be less than or equal to 20 ppm.

In the prior art, electroslag remelting is carried out in a copper water-cooled crystallizer, one end of a consumable electrode 2 is embedded into a slag pool in an electroslag furnace and is electrified, joule heat is released from the slag pool (material), the end of the consumable electrode 2 is melted layer by layer, molten metal is converged into liquid drops, the liquid drops pass through the slag pool to form a liquid metal molten pool, and the liquid metal molten pool is gradually solidified from bottom to top to form a steel ingot.

In order to reduce the oxygen content in the steel ingot, the electroslag remelting provided by the utility model uses the gas protection technology, namely the electroslag furnace can contain the consumable electrode 2 in the protective cover 3 and introduce Ar (argon) or N ₂ And (nitrogen) protecting to perform electroslag remelting. Under the protection of gas, the consumable electrode 2 is arranged in a protective cover 3 for remelting (introducing Ar or N) ₂ Protection), can stop the invasion of oxygen in the atmosphere, thereby reducing the content of oxygen element in the steel ingot.

Therefore, the utility model provides an electroslag furnace, which comprises a furnace body 1, wherein a hearth opening for installing a consumable electrode 2 is arranged above the furnace body 1, and a hearth opening platform is arranged around the hearth opening; the device also comprises a protective cover 3 and a dust hood 4; the protective cover 3 is of an annular structure, is arranged on the hearth opening platform and is in insulation fit with the furnace body 1, the protective cover 3 is used for covering the hearth opening, a gas ring 5 used for conveying inert gas is arranged in the protective cover 3, and a gas nozzle 6 is arranged on the gas ring 5, extends towards the direction of the hearth opening, penetrates through the protective cover 3 and is used for conveying inert gas to the interior of the furnace body 1 so as to realize the isolation of the part of the consumable electrode 2 positioned in the furnace body 1 from oxygen; the dust hood 4 is arranged above the protective cover 3. The utility model provides an after the electroslag furnace drops into actual operation, consumable electrode 2 when the remelting, can spout argon gas to the crystallizer in the upper shed, make the consumable electrode 2 surface between slag bath face to the safety cover 3 receive argon gas protection, slow down its surface oxidation, reduce oxygenation in to the steel. The utility model discloses be provided with baffle 7, baffle 7 is installed in safety cover 3 tops, can adjust the size in middle space. When the consumable electrode 2 is mounted, the gap between the partition 7 is increased, and after the electrode is mounted, the partition 7 is closed to minimize the gap between the partition 7 and the surface of the base material (consumable electrode). Then argon is connected, and electricity is supplied for remelting. The fume escaping from the gap between the partition board 7 and the surface of the base material is sucked and removed by the upper layer of the air extraction cover. The partition plate 7 can be opened during electroslag remelting to observe 'the smelting condition in the center of the parent metal'. Be provided with dust excluding hood 4 above baffle 7, dust excluding hood 4 bottom is provided with the screw foot (be used for raising dust excluding hood 4), and dust excluding hood 4 installs at 3 upsides of safety cover and staggers (do not influence opening and shutting of intermediate bottom 7) with baffle 7, can take out the flue gas of overflowing in baffle 7 and the mother metal surface gap through dust excluding hood 4. In the present invention, the protective cover 3 is preferably made of stainless steel.

The normal remelting GCr15 bearing steel of the conventional electroslag furnace is carried out in the atmospheric environment (the upper opening of a crystallizer is only provided with 1 dust removal exhaust hood), the surface of a consumable electrode 2 is oxidized, and oxygen is continuously added into the steel along with the electrode melting. The closer to the surface of the slag bath, the higher the temperature of the electrode surface, the more serious the oxidation degree, and the oxygen content in the produced GCr15 bearing steel is between 22 and 30ppm, which can not meet the requirement of the new standard that O is less than or equal to 20 ppm. The utility model provides an electroslag furnace, through its structural design, can let in inert gas such as argon gas or nitrogen gas through safety cover 3 and protect, when consumable electrode 2 electroslag is remelted, cover consumable electrode 2 (high temperature zone) between 3 with slag bath face to gaseous safety cover under the argon protection, reduced electrode surface oxidation to oxygenation in the reduction steel. The utility model solves the problem of oxidation of the consumable electrode 2 in the use process of the electroslag furnace.

It will be appreciated by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims (11)

1. An electroslag furnace, which comprises a furnace body (1), wherein a hearth opening for loading a consumable electrode (2) is arranged above the furnace body, and is characterized in that,

a hearth opening platform is arranged around the hearth opening;

the dust removal device also comprises a protective cover (3) and a dust removal cover (4);

the protective cover is of an annular structure, is arranged on the hearth opening platform and is in insulation fit with the furnace body, and is used for covering the hearth opening, a gas ring (5) for conveying inert gas is arranged in the protective cover, and a gas nozzle (6) is arranged on the gas ring, extends towards the direction of the hearth opening, penetrates through the protective cover and is used for conveying the inert gas to the interior of the furnace body so as to realize the isolation of the part of the consumable electrode in the furnace body from oxygen;

the dust excluding hood set up in the top of safety cover.

2. Electroslag furnace according to claim 1,

a partition plate (7) is arranged on the upper side face of the protective cover, a partition plate opening is formed in the partition plate, and the partition plate can be clamped on the consumable electrode and used for sealing a gap between the protective cover and the consumable electrode.

3. Electroslag furnace according to claim 2,

the baffle is including two at least baffle units, and all baffle units splice into the baffle, wherein two at least the baffle with the side is articulated on the safety cover, is used for adjusting the open-ended opening of baffle.

4. Electroslag furnace according to claim 2,

the safety cover is including top panel and lower panel, down the panel with furnace mouth platform insulation formula contact, the top panel with the lower panel is separated to be set up and is formed with installation space, the gas ring sets up in the installation space.

5. Electroslag furnace according to claim 4,

the upper panel is an annular plate, the lower panel is an annular plate, a protective cover inner side surface is arranged between the upper panel and the inner edge of the lower panel, and a protective cover outer side surface is arranged between the upper panel and the outer edge of the lower panel;

the air nozzle is of a straight pipe structure, one end of the air nozzle is connected with the gas ring, and the other end of the air nozzle penetrates through the inner side face of the protective cover.

6. Electroslag furnace according to claim 5,

the air nozzle is horizontally arranged.

7. Electroslag furnace according to claim 5,

the upper panel with be provided with welt (8) down between the panel, the welt with the upper panel and the panel sets up perpendicularly down, the welt with the upper panel and the diameter of panel sets up with the face down, the welt is provided with a plurality ofly, and is whole the welt winds the centre of a circle of upper panel is equidistant to be set up.

8. Electroslag furnace according to claim 7,

the lining plate is of a wedge-shaped flat plate structure;

the topside of welt be the horizontal limit and for the long limit and with top panel fixed connection, the base of welt be the horizontal limit and for the minor face and with bottom panel fixed connection, the outside limit of welt is the hypotenuse, the inboard edge of welt be vertical limit and with the top panel and the inner edge of panel flushes down.

9. Electroslag furnace according to claim 7,

the upper panel is made of metal;

the lower panel is made of metal;

the lining plate is made of metal;

the partition plate is made of metal;

the gas ring is made of metal;

the air nozzle is made of metal.

10. Electroslag furnace according to claim 9,

the metal is 304 stainless steel.

11. Electroslag furnace according to any of claims 1 to 10,

the inert gas is argon.

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