CN111500870A

CN111500870A - Vacuum electroslag furnace

Info

Publication number: CN111500870A
Application number: CN202010322584.XA
Authority: CN
Inventors: 崔忠信; 王学慧; 田兴
Original assignee: HBIS Co Ltd
Current assignee: HBIS Co Ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-08-07

Abstract

The invention relates to a vacuum electroslag furnace, and belongs to the technical field of smelting equipment in the metallurgical industry. The technical scheme is as follows: contain electrically conductive material pole (1), sealed cowling (6), petticoat pipe (7), crystallizer (8) and end water tank (9), the upper and lower both ends of petticoat pipe (7) are connected through flange and U type card with sealed cowling (6) and crystallizer (8) respectively, are equipped with electrically conductive material pole (1) on sealed cowling (6), and crystallizer (8) below is equipped with end water tank (9), its characterized in that: seals are respectively arranged between the conductive material rod (1) and the sealing cover (6), between the sealing cover (6) and the smoke hood (7), between the smoke hood (7) and the crystallizer (8) and between the crystallizer (8) and the bottom water tank (9); the invention has the beneficial effects that: the common electroslag furnace can reach the vacuum sealing condition, and vacuum electroslag smelting can be carried out after the vacuum system is vacuumized. When vacuum smelting is not needed, the corresponding seal is removed and the recovery can be realized.

Description

Vacuum electroslag furnace

Technical Field

The invention relates to a vacuum electroslag furnace, and belongs to the technical field of smelting equipment in the metallurgical industry.

Background

The vacuum electroslag furnace is an electroslag furnace in a vacuum environment, has the advantages of extremely low gas content of the vacuum furnace and accurately controllable components, and has the characteristics of high purity of the electroslag furnace, good desulfurization effect and the like. The smelting process is in a vacuum environment, the interference of O, N, H in the air can be avoided, and the content of the oxygen in the molten steel can be accurately controlled. In the long run, the development prospect of the vacuum electroslag furnace is wide, and the vacuum electroslag furnace can gradually replace the common electroslag furnace.

At present, the conventional common electroslag furnace mainly comprises a conductive material rod, a sealing cover, a smoke cover, a crystallizer and a bottom water tank, wherein two ends of the smoke cover are respectively connected with the sealing cover and the crystallizer through flanges, the conductive material rod is arranged on the sealing cover, and the bottom water tank is arranged below the crystallizer.

Patent No. CN201110266989, which mainly provides three sealing methods at a false electrode of an electroslag furnace. Firstly, the surface of the false electrode is rough, the sealing difficulty is high, and the cost is high; secondly, the vacuum electroslag furnace is changed from a common electroslag furnace, only a false electrode part can be sealed, and all interface parts of the common electroslag furnace need to be connected and sealed, so that the condition of vacuum sealing can be achieved.

Disclosure of Invention

The invention aims to provide a vacuum electroslag furnace, which can enable a common electroslag furnace to achieve a vacuum sealing condition, can perform vacuum electroslag smelting after a vacuum system is vacuumized, improves the smelting quality and solves the problems in the background technology.

The technical scheme of the invention is as follows:

a vacuum electroslag furnace comprises a conductive material rod, a sealing cover, a smoke hood, a crystallizer and a bottom water tank, wherein the upper end and the lower end of the smoke hood are respectively connected with the sealing cover and the crystallizer through flanges and U-shaped clamps;

the seal between the conductive material rod and the seal cover comprises a pressing plate, a felt and a framework lip seal, the framework lip seal is arranged between the conductive material rod and the seal cover, the pressing plate is tightly pressed on the framework lip seal, and the felt is arranged between the pressing plate and the framework lip seal;

the seal between the seal cover and the smoke hood comprises a first seal ring, and the first seal ring is arranged in a groove of a flange at the upper end of the smoke hood;

the seal between the smoke hood and the crystallizer comprises a seal ring II and a seal ring III, grooves matched with the seal ring II and the seal ring III are respectively arranged on a flange connected with the smoke hood and the crystallizer, the seal ring III is arranged in the groove of the flange of the crystallizer, and the seal ring II is arranged in the groove of the flange at the lower end of the smoke hood;

the sealing between the crystallizer and the bottom water tank comprises a heat-conducting copper plate and a sealing ring IV, the heat-conducting copper plate is fixed above the bottom water tank, a groove is formed in the heat-conducting copper plate, a copper sleeve of the crystallizer is inserted into the groove of the heat-conducting copper plate, and the sealing ring IV is arranged between the heat-conducting copper plate and the copper sleeve of the crystallizer.

The pressure plate is fixed on the sealing cover through bolts.

And a groove matched with the felt is formed in the center of the pressing plate.

The top of the sealing cover is provided with a sinking groove, and a framework lip seal between the conductive material rod and the sealing cover is arranged in the sinking groove.

And an annular groove matched with the sealing ring in four directions is arranged in the groove of the heat-conducting copper plate.

The invention has the beneficial effects that: the vacuum electroslag smelting furnace can achieve the vacuum sealing condition of a common electroslag furnace, and can perform vacuum electroslag smelting after the vacuum system is vacuumized, so that the smelting quality is improved. When vacuum smelting is not needed, the corresponding seal is removed and the recovery can be realized.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the conductive material rod, the sealing cover and the smoke hood of the present invention;

FIG. 3 is a schematic view of the structure of the sealing cap of the present invention;

FIG. 4 is a schematic view of the hood and crystallizer seals of the present invention;

FIG. 5 is a schematic view of the crystallizer and the bottom water tank sealing according to the present invention;

in the figure: 1. a conductive material rod; 2. pressing a plate; 3. a bolt; 4. felt; 5. sealing the framework by lip; 6. a sealing cover; 7. a smoke hood; 8. a crystallizer; 9. a bottom water tank; 10. a first cooling water cavity; 11. a first sealing ring; 12. a second cooling water cavity; 13. a U-shaped card; 14. sinking a groove; 15. a second sealing ring; 16. a third sealing ring; 17. a cooling water cavity III; 18. a copper sleeve; 19. a heat-conducting copper plate; 20. and a sealing ring IV.

Detailed Description

The invention is further illustrated by way of example in the following with reference to the accompanying drawings.

Referring to the attached figure 1, the vacuum electroslag furnace comprises a conductive material rod 1, a sealing cover 6, a smoke hood 7, a crystallizer 8 and a bottom water tank 9, wherein the upper end and the lower end of the smoke hood 7 are respectively connected with the sealing cover 6 and the crystallizer 8 through flanges and U-shaped clamps, the conductive material rod 1 is arranged on the sealing cover 6, the bottom water tank 9 is arranged below the crystallizer 8, and seals are respectively arranged between the conductive material rod 1 and the sealing cover 6, between the sealing cover 6 and the smoke hood 7, between the smoke hood 7 and the crystallizer 8 and between the crystallizer 8 and the bottom water tank 9;

the seal between the conductive material rod 1 and the seal cover 6 comprises a pressing plate 2, a felt 4 and a framework lip seal 5, the framework lip seal 5 is arranged between the conductive material rod 1 and the seal cover 6, the pressing plate 2 is tightly pressed on the framework lip seal 5, and the felt 4 is arranged between the pressing plate 2 and the framework lip seal 5;

the seal between the seal cover 6 and the smoke hood 7 comprises a first seal ring 11, and the first seal ring 11 is arranged in a groove of a flange at the upper end of the smoke hood 7;

the seal between the smoke hood 7 and the crystallizer 8 comprises a second seal ring 15 and a third seal ring 16, grooves matched with the second seal ring 15 and the third seal ring 16 are respectively arranged on flanges connected with the smoke hood 7 and the crystallizer 8, the third seal ring 16 is arranged in the groove of the flange of the crystallizer 8, and the second seal ring 15 is arranged in the groove of the flange at the lower end of the smoke hood 7;

the sealing between the crystallizer 8 and the bottom water tank 9 comprises a heat-conducting copper plate 19 and a sealing ring four 20, the heat-conducting copper plate 19 is fixed above the bottom water tank 9, a groove is formed in the heat-conducting copper plate 19, a copper sleeve 18 of the crystallizer 8 is inserted into the groove of the heat-conducting copper plate 19, and the sealing ring four 20 is arranged between the heat-conducting copper plate 19 and the copper sleeve 18 of the crystallizer 8.

In this embodiment, referring to fig. 1, a smelting chamber of a common electroslag furnace is sealed, which mainly includes: the sealing between the conductive material rod 1 and the sealing cover 6, the sealing between the sealing cover 6 and the smoke hood 7, the sealing between the smoke hood 7 and the crystallizer 8 and the sealing between the crystallizer 8 and the bottom water tank 9 are realized, and the common electroslag furnace smelting cavity can ensure the air tightness and realize vacuum smelting as long as the parts are sealed.

As shown in fig. 2 and 3, the sealing of the upper part of the smoke hood 7 includes the sealing between the conductive material rod 1 and the sealing cover 6 and the sealing between the sealing cover 6 and the smoke hood 7, and the specific method is as follows: the surface roughness of the conductive material rod 1 is low, the sealing is simple, the structure comprises a pressing plate 2, a bolt 3, a felt 4, a framework lip seal 5, a sealing cover 6, a U-shaped clamp 13 and a sealing ring 11, wherein the sealing ring 11 is arranged in a groove of a flange of a smoke hood 7, the flange of the sealing cover 6 and the flange of the smoke hood 7 are fixed through the U-shaped clamp 13 after being aligned, the framework lip seals 5 are arranged in a sink 14 of the sealing cover 6 in three pieces and are arranged up and down, the lip of the framework lip seal 5 at the lowest part faces inwards, and the lip of the two framework lip seals 5 at the upper part faces outwards, and the combination installation ensures the sealing effect; a pressing plate 2 is arranged above the lip seal 5 and fixed through a bolt 3, and a felt 4 is arranged at the central groove part of the pressing plate 2 to clean dust and insulate; a hollow cooling water cavity I10 is designed in the sealing cover 6, and cooling water is introduced to cool the sealing cover 6.

As shown in fig. 4, the sealing method between the hood 7 and the crystallizer 8 is as follows: because the flange between petticoat pipe 7 and the crystallizer 8 equals, and all there is the cooling chamber to cool off, therefore, only need increase twice sealing washer between the flange of petticoat pipe 7 and crystallizer 8 can, namely outside processing seal groove at the flange of crystallizer 8, install sealing washer three 16, processing seal groove at the petticoat pipe 7 flange inboard, install sealing washer two 15, sealing washer two 15 designs under cooling water chamber two 12, cooling water chamber three 17 is just upper, guarantee that the temperature of sealing washer two 15 is lower, sealing washer two 15 and sealing washer three 16 constitute upper seal and lower seal, the dislocation mounting, improve sealed effect.

As shown in fig. 5, the sealing method between the crystallizer 8 and the bottom water tank 9 is as follows: according to the fact that a copper sleeve 18 in a crystallizer 8 extends out of the outer wall of the crystallizer by 5mm, a heat conducting copper plate 19 on the upper portion of a bottom water tank 9 is provided with a groove with the depth of 5mm, the copper sleeve 18 of the crystallizer 8 is inserted into the groove, the cooling rate is increased, when the liquid level of molten steel is formed, the self-sealing effect is achieved, meanwhile, the heat insulation effect is achieved on a sealing ring four 20, the sealing ring four 20 is installed in an annular groove outside the groove of the bottom water tank 9, and the sealing effect is achieved when the liquid level.

In the implementation process, the framework lip seal 5 is a framework seal with a pre-tightening spring, and the felt 4 is a high-temperature-resistant insulating felt; the corresponding sealing ring is sealed by 5.3 of GB/T3452.1 standard, and the material is high-temperature resistant silica gel; the entire sealing cover 6 is welded by using =5 steel plate.

Claims

1. The utility model provides a vacuum electroslag furnace, contains electrically conductive material pole (1), sealed cowling (6), petticoat pipe (7), crystallizer (8) and end water tank (9), and the upper and lower both ends of petticoat pipe (7) are connected with sealed cowling (6) and crystallizer (8) through flange and U type card respectively, are equipped with electrically conductive material pole (1) on sealed cowling (6), and crystallizer (8) below is equipped with end water tank (9), its characterized in that: seals are respectively arranged between the conductive material rod (1) and the sealing cover (6), between the sealing cover (6) and the smoke hood (7), between the smoke hood (7) and the crystallizer (8) and between the crystallizer (8) and the bottom water tank (9);

the seal between the conductive material rod (1) and the seal cover (6) comprises a pressing plate (2), a felt (4) and a framework lip seal (5), the framework lip seal (5) is arranged between the conductive material rod (1) and the seal cover (6), the pressing plate (2) is tightly pressed on the framework lip seal (5), and the felt (4) is arranged between the pressing plate (2) and the framework lip seal (5);

the seal between the seal cover (6) and the smoke hood (7) comprises a first seal ring (11), and the first seal ring (11) is arranged in a groove of a flange at the upper end of the smoke hood (7);

the seal between the smoke hood (7) and the crystallizer (8) comprises a seal ring II (15) and a seal ring III (16), grooves matched with the seal ring II (15) and the seal ring III (16) are respectively arranged on a flange, connected with the crystallizer (8), of the smoke hood (7), the seal ring III (16) is arranged in the groove of the flange of the crystallizer (8), and the seal ring II (15) is arranged in the groove of the flange at the lower end of the smoke hood (7);

the sealing between the crystallizer (8) and the bottom water tank (9) comprises a heat-conducting copper plate (19) and four sealing rings (20), the heat-conducting copper plate (19) is fixed above the bottom water tank (9), a groove is formed in the heat-conducting copper plate (19), a copper sleeve (18) of the crystallizer (8) is inserted into the groove of the heat-conducting copper plate (19), and the four sealing rings (20) are arranged between the heat-conducting copper plate (19) and the copper sleeve (18) of the crystallizer (8).

2. A vacuum electroslag furnace according to claim 1, wherein: the pressing plate (2) is fixed on the sealing cover (6) through bolts (3).

3. A vacuum electroslag furnace according to claim 1 or 2, wherein: the center of the pressing plate (2) is provided with a groove matched with the felt (4).

4. A vacuum electroslag furnace according to claim 1, wherein: the top of the sealing cover (6) is provided with a sinking groove (14), and a framework lip seal (5) between the conductive material rod (1) and the sealing cover (6) is arranged in the sinking groove (14).

5. A vacuum electroslag furnace according to claim 1, wherein: and an annular groove matched with the four sealing rings (20) is arranged in the groove of the heat-conducting copper plate (19).