CN115505686B - Protection device for sealing ring of vacuum tank of VD furnace and use method - Google Patents
Protection device for sealing ring of vacuum tank of VD furnace and use method Download PDFInfo
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- CN115505686B CN115505686B CN202211201286.0A CN202211201286A CN115505686B CN 115505686 B CN115505686 B CN 115505686B CN 202211201286 A CN202211201286 A CN 202211201286A CN 115505686 B CN115505686 B CN 115505686B
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- vacuum tank
- sealing ring
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- 238000007789 sealing Methods 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000007789 gas Substances 0.000 claims abstract description 157
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 90
- 238000007670 refining Methods 0.000 claims abstract description 68
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 64
- 239000010959 steel Substances 0.000 claims abstract description 64
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000003860 storage Methods 0.000 claims abstract description 57
- 229910052786 argon Inorganic materials 0.000 claims abstract description 45
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 28
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 claims abstract description 28
- 238000005261 decarburization Methods 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims description 17
- 210000003437 trachea Anatomy 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims 2
- 238000012544 monitoring process Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 16
- 238000009628 steelmaking Methods 0.000 abstract description 8
- 238000005096 rolling process Methods 0.000 description 10
- 238000005262 decarbonization Methods 0.000 description 7
- 239000013049 sediment Substances 0.000 description 6
- 239000002893 slag Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000009489 vacuum treatment Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 244000257782 Ipomoea triloba Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000009842 primary steelmaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/068—Decarburising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention belongs to a protection device for a vacuum tank sealing ring of a VD furnace in the technical field of steelmaking and refining, and also relates to a use method for the protection device for the vacuum tank sealing ring of the VD furnace. A limit ring (3) is installed on a lifting sliding rod (2) on one side of a vacuum tank body (1) of a refining furnace, a sealing tank cover (5) is installed on a lifting control disc (4), an argon storage chamber (7) is communicated with a unidirectional inflation tube I (12), and a gas control tube II (30) is installed on a unidirectional inflation tube II (29). According to the protection device and the use method of the vacuum tank sealing ring of the VD furnace, argon can be filled into the vacuum tank of the refining furnace at any time according to operation requirements, the periphery of the tank and the sealing ring is cooled in time, the VD tank sealing ring is protected, carbon dioxide is blown in from the bottom of molten steel during production, decarburization and denitrification operation can be rapidly performed, a gas column is prevented from occurring in the molten steel, and damage to the sealing ring caused by splashing of the molten steel on the sealing ring is avoided.
Description
Technical Field
The invention belongs to the technical field of steelmaking and refining, and particularly relates to a protecting device for a sealing ring of a vacuum tank body of a VD furnace, and a using method of the protecting device for the sealing ring of the vacuum tank body of the VD furnace.
Background
The VD furnace is also called a vacuum degassing furnace, and is mainly used for refining high-temperature molten steel, so that the VD furnace is also called a VD refining method. The VD refining method is a molten steel vacuum treatment method that primary steelmaking liquid of an electric furnace and a converter is placed in a closed tank for vacuumizing, and argon blowing and stirring are carried out at the bottom of a steel ladle. When the VD furnace is used for processing, a steel ladle filled with high-temperature molten steel falls into the VD pit, and then a cover is covered for vacuumizing. The upper edge of the vacuum tank body is provided with an annular groove, a rubber sealing ring is arranged in the groove, and water is injected into the groove during treatment, so that the sealing ring is cooled during VD vacuum treatment. When the VD furnace is in vacuum treatment, molten steel is easy to splash, and some molten steel splashes onto the sealing ring, so that the sealing ring is damaged. Chinese patent discloses a VD stove vacuum tank sealing washer protection device (grant bulletin number CN 102747195B), and this patent can alleviate or avoid the radiation, the baking effect of central little bell high temperature inside lining to sealed one side sealing washer, improves the sealing washer life-span, reduces manufacturing cost, guarantees the sealed and vacuum refining effect of vacuum tank, but, this patent only avoids the sealing washer to receive high temperature radiation when removing the bell, does not pay attention to carrying out timely cooling to the vacuum tank internal, can reduce the production efficiency of VD stove, and then reduces the device practicality.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: to the not enough of prior art, provide a VD stove vacuum tank body sealing washer protection device, the device can be at the in-process of production as required, at any time to the internal argon gas that fills of refining furnace vacuum tank, carry out timely cooling to tank body and sealing washer periphery, thereby protect VD tank body sealing washer, also can be after the production, fill argon gas into the tank body, cool down to the sealing washer, in addition, blow in carbon dioxide from the molten steel bottom when producing, can carry out decarbonization denitrification operation rapidly, prevent that the gas column from appearing in molten steel, avoid the molten steel to appear splashing and lead to the sealing washer damage on the sealing washer, still can avoid the phenomenon that the molten steel appears rolling up the sediment, thereby avoid influencing later stage product quality, promote steelmaking refining technology's performance comprehensively.
The technical scheme adopted by the invention is as follows:
the invention relates to a sealing ring protection device for a vacuum tank body of a VD furnace, which comprises a vacuum tank body of the refining furnace, wherein a lifting sliding rod is fixedly arranged at the top end of one side of the vacuum tank body of the refining furnace, a limiting ring is fixedly arranged at the top end of one side of the lifting sliding rod, a lifting control disc is arranged on the surface of the lifting sliding rod, a sealing tank cover is arranged on one side of the lifting control disc, a gas storage box is arranged at the bottom end of the vacuum tank body of the refining furnace, a gas separation plate is fixedly arranged in the gas storage box, the gas separation plate divides the gas storage box into an argon gas storage chamber and a carbon dioxide storage chamber, one side of the argon storage chamber is communicated with a first gas adding pipe, one side of the carbon dioxide storage chamber is communicated with a second gas adding pipe, the argon storage chamber is communicated with a unidirectional gas charging pipe I, the unidirectional gas charging pipe I is provided with a gas control pipe I, the unidirectional gas charging pipe II is communicated with the unidirectional gas charging pipe, the unidirectional charging pipe II is provided with a gas control pipe II, the unidirectional charging pipe II is communicated with the vacuum tank body of the refining furnace, the lifting control disc is larger than the cross section of the lifting sliding rod, the lifting control disc is movably connected with the lifting sliding rod, the lifting control disc is fixedly connected with the sealing tank cover, the gas storage chamber is communicated with the argon control pipe I and the gas control pipe is provided with the gas control pipe I, the gas control pipe is respectively, one side of the gas pipe is provided with a valve, and one side of the rotary rod is provided with a rotary rod.
The top end of one side of the lifting control disc is fixedly provided with a temperature control box, one side of the temperature control box is provided with a rotating shaft, one side of the rotating shaft is provided with a lifting adjusting rod, and the surface of the lifting adjusting rod is provided with a heat insulation pad.
The sealing clamping groove is formed in the bottom end of one side of the lifting control disc, the temperature measuring block is fixedly mounted on one side of the lifting control disc, which is far away from the temperature control box, the cross section width of the sealing clamping groove is larger than that of the surface of the vacuum tank body of the refining furnace, the sealing clamping groove is movably clamped with the vacuum tank body of the refining furnace, and the power box is fixedly mounted on the top end of one side, which is far away from the rotating shaft, of the temperature control box.
The temperature control box is characterized in that a warning lamp is fixedly arranged at the top end of the temperature control box, a power supply controller is arranged at the top end of one side of the front surface of the temperature control box, a temperature display disc is fixedly arranged at one side of the power supply controller, an adjusting setting disc is fixedly arranged at the bottom end of the temperature display disc, and a setting key is arranged on the surface of the adjusting setting disc.
The lifting sliding rod is characterized in that a limiting ring is fixedly arranged at the top end of one side of the lifting sliding rod, a lifting control disc is detachably arranged on the surface of the lifting sliding rod, a sealing tank cover is detachably arranged on one side of the lifting control disc, and a gas storage box is detachably arranged at the bottom end of the vacuum tank body of the refining furnace.
The gas storage box is characterized in that a gas separation plate is fixedly arranged in the gas storage box, a gas control tube I is fixedly arranged on the unidirectional gas charging tube I, and a gas control tube II is fixedly arranged on the unidirectional gas charging tube II.
The lifting control panel is movably sleeved with the lifting sliding rod, the lifting control panel is connected with the sealing tank cover in a driven connection mode, and the rotary shaft is detachably arranged on one side of the temperature control box.
The gas control pipe I side demountable installation hinder the trachea, hinder trachea one side top demountable installation rotary rod, rotary rod one side demountable installation control valve.
And the gas control pipe II side is detachably provided with a gas blocking pipe, the top end of one side of the gas blocking pipe is detachably provided with a rotary rod, and one side of the rotary rod is detachably provided with a control valve.
The invention also relates to a use method of the vacuum tank sealing ring protection device of the VD furnace, argon is filled into the vacuum tank of the refining furnace at any time according to the requirement in the production process, the periphery of the tank and the sealing ring is cooled in time, so that the VD tank sealing ring is protected, or after the production is finished, argon is filled into the tank to cool the sealing ring, in addition, carbon dioxide is blown in from the bottom of molten steel in the production process, decarburization and denitrification operation can be rapidly performed, gas columns in the molten steel are prevented, the molten steel is prevented from splashing to the sealing ring to cause damage of the sealing ring, the phenomenon of slag rolling of the molten steel is avoided, the influence on the quality of a later-stage product is avoided, and the performance of the steelmaking refining technology is comprehensively improved.
The application method of the VD furnace vacuum tank sealing ring protection device comprises the following steps:
s1, lifting a lifting control disc through a lifting adjusting rod on a temperature control box, so as to control the lifting of a sealing tank cover, wherein a sealing clamping groove is formed in the bottom end of the lifting control disc and is clamped at the edge of a vacuum tank body of a refining furnace, and a sealing effect is achieved;
s2, the temperature measuring block monitors the temperature in the vacuum tank body of the refining furnace, the temperature is displayed on a temperature display disc, when the temperature is higher than a set value, a warning lamp is turned on, at the moment, a control valve on a gas control pipe I is controlled to be opened, argon is filled into the vacuum tank body of the refining furnace, the interior of the vacuum tank body 1 of the refining furnace is cooled, and when the actual temperature in the vacuum tank body of the refining furnace is lower than the set value, a control valve 28 on the gas control pipe I is controlled to be closed, and the supply of the argon is stopped;
s3, in the decarburization and denitrification process, a control valve of a gas control pipe I on a gas control pipe II is controlled to be opened, carbon dioxide is filled into a vacuum tank body of the refining furnace from the bottom of molten steel, decarburization and denitrification of the molten steel are accelerated, production of a gas column is reduced, molten steel splashing is avoided, and a sealing ring is prevented from being damaged;
s4, the first gas adding pipe supplies argon into the argon storage chamber, and the second gas adding pipe supplies carbon dioxide into the carbon oxide storage chamber.
By adopting the technical scheme of the invention, the working principle and the beneficial effects are as follows:
according to the VD furnace vacuum tank sealing ring protection device and the use method thereof, the lifting sliding rod, the lifting control disc, the gas storage box, the argon storage chamber, the first gas adding pipe, the unidirectional gas charging pipe I, the gas control pipe I, the unidirectional gas charging pipe II, the gas control pipe II and other parts are effectively matched, so that the refining furnace vacuum tank is conveniently cooled in time, the damage of high temperature to the sealing ring can be prevented, the normal use of the sealing ring is influenced, and the cooling of the vacuum tank is accelerated, so that the production efficiency of the device is improved, and the practicability of the device is improved. The device 1 can fill argon into the tank body, and can timely cool the vacuum tank body of the refining furnace in the production process and after the treatment is finished, so that the VD tank body sealing ring is protected. 2. The device can also fill carbon dioxide from the molten steel bottom, carries out decarbonization denitrification operation to the molten steel, avoids appearing the molten steel and splashes, the problem of damage sealing washer, can also avoid the molten steel to appear the phenomenon of rolling up the sediment simultaneously, influences later stage product quality. According to the protection device and the use method of the vacuum tank sealing ring of the VD furnace, argon can be filled into the vacuum tank of the refining furnace at any time according to operation requirements, the periphery of the tank and the sealing ring is cooled in time, so that the VD tank sealing ring is protected, argon can be filled into the tank after production is finished, the sealing ring is cooled, in addition, carbon dioxide is blown in from the bottom of molten steel during production, decarburization and denitrification operation can be rapidly performed, gas columns in the molten steel are prevented, the phenomenon that the molten steel splashes onto the sealing ring to cause damage to the sealing ring is avoided, slag rolling of the molten steel is avoided, the quality of later products is prevented from being influenced, and the overall performance of steelmaking refining equipment is comprehensively improved.
Drawings
The following is a brief description of what is expressed in the drawings of this specification and the references in the drawings:
FIG. 1 is a schematic structural view of a sealing ring protection device for a vacuum tank of a VD furnace;
FIG. 2 is a schematic structural view of a sealing ring protection device for a vacuum tank of a VD furnace according to the invention;
FIG. 3 is a schematic structural view of a sealing ring protection device for a vacuum tank of a VD furnace according to the invention;
FIG. 4 is a schematic structural view of a sealing ring protection device for a vacuum tank of a VD furnace according to the invention;
the reference numerals in the figures are respectively: 1. a refining furnace vacuum tank body; 2. lifting the sliding rod; 3. a limiting ring; 4. lifting control panel; 5. sealing the can lid; 6. a gas storage tank; 7. an argon storage chamber; 8. a carbon dioxide storage chamber; 9. a first gas adding pipe; 10. a second gas adding pipe; 11. a gas barrier; 12. a unidirectional inflation tube; 13. a gas control tube; 14. a temperature control box; 15. a rotation shaft; 16. lifting and lowering the adjusting rod; 17. a heat insulating mat; 18. sealing the clamping groove; 19. a temperature measuring block; 20. a power box; 21. a warning light; 22. a power supply controller; 23. a temperature display panel; 24. adjusting the setting plate; 25. setting keys; 26. a choke tube; 27. a rotating rod; 28. a control valve; 29. a unidirectional inflation tube II; 30. and a gas control pipe II.
Detailed Description
The following describes the shape, structure, mutual position and connection relation between parts, action of parts and working principle of the specific embodiment of the present invention by describing examples in further detail:
as shown in the attached drawing 1, the invention discloses a protecting device for a sealing ring of a vacuum tank body of a VD furnace, which comprises a vacuum tank body 1 of the refining furnace, wherein a lifting sliding rod 2 is fixedly arranged at the top end of one side of the vacuum tank body 1 of the refining furnace, a limiting ring 3 is fixedly arranged at the top end of one side of the lifting sliding rod 2, a lifting control disc 4 is arranged on the surface of the lifting sliding rod 2, a sealing tank cover 5 is arranged at one side of the lifting control disc 4, a gas storage box 6 is arranged at the bottom end of the vacuum tank body 1 of the refining furnace, a gas separation plate 11 is fixedly arranged in the gas storage box 6, the gas separation plate 11 divides the interior of the gas storage box 6 into an argon storage chamber 7 and a carbon dioxide storage chamber 8, one side of the argon storage chamber 7 is communicated with a first gas adding pipe 9, one side of the carbon dioxide storage chamber 8 is communicated with a second gas adding pipe 10, the argon storage chamber 7 is communicated with a unidirectional gas pipe I12, a unidirectional gas charging pipe I13 is arranged on one side of the unidirectional gas charging pipe I12, the unidirectional gas charging pipe I12 is communicated with the refining furnace vacuum tank body 1, a unidirectional gas charging pipe II 29 is arranged on the unidirectional gas charging pipe II 29, a gas charging pipe II 30 is arranged on the unidirectional gas charging pipe II 29, the unidirectional gas charging pipe II 29 is communicated with the refining furnace vacuum tank body 1, the lifting control chamber 4 is communicated with the lifting control disc 1, the lifting control disc 4 is fixedly connected with the lifting control disc 2, the lifting control rod 2 is connected with the lifting control rod 2, the lifting control rod is connected with the lifting control rod 26 by the lifting control rod, the lifting control rod 2 is fixedly connected with the lifting control rod, and the lifting control rod 2 is connected with the lifting control rod, and the lifting control rod 3, and the lifting control rod is connected with the lifting control rod 3, and the lifting control rod 2 is respectively, and the lifting control rod 2 is connected with the lifting control rod 2, and the lifting control valve is connected with the lifting control valve, and the lifting control valve 2, and the lifting valve 2 and the lifting valve is shown by the lifting valve and the lifting valve is respectively, and the lifting valve and the lifting device is shown. The structure provides an improved technical scheme aiming at the defects in the prior art. In the specific implementation process of the device, the lifting sliding rod 2, the lifting control panel 4, the gas storage box 6, the argon storage chamber 7, the first gas adding pipe 9, the unidirectional gas charging pipe I12, the gas control pipe I13, the unidirectional gas charging pipe II 29, the gas control pipe II 30 and other parts are effectively matched, so that the refining furnace vacuum tank 1 is conveniently cooled in time, the damage of high temperature to the sealing ring can be prevented, the normal use of the sealing ring is influenced, the cooling of the vacuum tank is accelerated, the production efficiency of the device is improved, and the practicability of the device is improved. The structure of the invention, 1. The device can charge argon into the tank body, and can timely cool the vacuum tank body of the refining furnace in the production process and after the treatment is finished, thereby protecting the VD tank body sealing ring. 2. The device can also fill carbon dioxide from the molten steel bottom, carries out decarbonization denitrification operation to the molten steel, avoids appearing the molten steel and splashes, the problem of damage sealing washer, can also avoid the molten steel to appear the phenomenon of rolling up the sediment simultaneously, influences later stage product quality. According to the protection device for the vacuum tank sealing ring of the VD furnace, argon can be filled into the vacuum tank of the refining furnace at any time according to the requirement, the periphery of the tank and the sealing ring is cooled in time, so that the VD tank sealing ring is protected, argon can be filled into the tank after production is finished, the sealing ring is cooled, in addition, carbon dioxide is blown in from the bottom of molten steel during production, decarburization and denitrification operation can be rapidly performed, gas columns in the molten steel are prevented, the phenomenon that the molten steel splashes onto the sealing ring to cause damage to the sealing ring is avoided, slag rolling phenomenon in the molten steel is avoided, the quality of a later product is prevented from being influenced, and the integral performance of steelmaking refining equipment is improved.
The top end of one side of the lifting control panel 4 is fixedly provided with a temperature control box 14, one side of the temperature control box 14 is provided with a rotating shaft 15, one side of the rotating shaft 15 is provided with a lifting adjusting rod 16, and the surface of the lifting adjusting rod 16 is provided with a heat insulation pad 17. The bottom of one side of the lifting control disc 4 is provided with a sealing clamping groove 18, one side of the lifting control disc 4, which is far away from the temperature control box 14, is fixedly provided with a temperature measuring block 19, the cross section width of the sealing clamping groove 18 is larger than that of the surface of the vacuum tank body 1 of the refining furnace, the sealing clamping groove 18 is movably clamped with the vacuum tank body 1 of the refining furnace, and the top of one side of the temperature control box 14, which is far away from the rotating shaft 15, is fixedly provided with a power box 20. The temperature control box 14 top fixed mounting warning light 21, temperature control box 14 front one side top installation power supply controller 22, power supply controller 22 one side fixed mounting temperature display disc 23, temperature display disc 23 bottom fixed mounting regulation setting dish 24, regulation setting dish 24 surface mounting setting key 25. Above-mentioned structure, in implementation process, adopt gas storage box 6, carbon dioxide storage room 8, second gas-filled tube 10, one-way gas tube II 29, gas control tube II 30, can in time carry out the injection of carbon dioxide to the molten steel bottom, play quick decarbonization denitrification effect to reduce the gas column in the molten steel and produce, first avoid the molten steel to lead to splashing serious phenomenon because the gas column, can appear splashing the phenomenon on the sealing washer, damage the surface of sealing washer, the second avoids appearing in the molten steel to roll up the sediment phenomenon, avoid appearing influencing the problem of product later quality, improve product quality.
The top end of one side of the lifting sliding rod 2 is fixedly provided with a limiting ring 3, the surface of the lifting sliding rod 2 is detachably provided with a lifting control disc 4, one side of the lifting control disc 4 is detachably provided with a sealing tank cover 5, and the bottom end of the vacuum tank body 1 of the refining furnace is detachably provided with a gas storage box 6. The gas storage box 6 is internally and fixedly provided with a gas separation plate 11, the unidirectional gas charging pipe I12 is fixedly provided with a gas control pipe I13, and the unidirectional gas charging pipe II 29 is fixedly provided with a gas control pipe II 30. The lifting control panel 4 and the lifting sliding rod 2 are movably connected in a sleeved mode, the lifting control panel 4 and the sealing tank cover 5 are connected in a driven mode, and a rotary shaft 15 is detachably arranged on one side of the temperature control box 14. The gas control pipe I13 side demountable installation hinder the trachea 26, hinder trachea 26 one side top demountable installation rotary rod 27, rotary rod 27 one side demountable installation control valve 28. The gas control pipe I30 side is detachably provided with a gas blocking pipe 26, the top end of one side of the gas blocking pipe 26 is detachably provided with a rotating rod 27, and one side of the rotating rod 27 is detachably provided with a control valve 28.
The invention also relates to a use method of the vacuum tank sealing ring protection device of the VD furnace, argon is filled into the vacuum tank of the refining furnace at any time according to the requirement in the production process, the periphery of the tank and the sealing ring is cooled in time, so that the VD tank sealing ring is protected, or after the production is finished, argon is filled into the tank to cool the sealing ring, in addition, carbon dioxide is blown in from the bottom of molten steel in the production process, decarburization and denitrification operation can be rapidly performed, gas columns in the molten steel are prevented, the molten steel is prevented from splashing to the sealing ring to cause damage of the sealing ring, the phenomenon of slag rolling of the molten steel is avoided, the influence on the quality of a later-stage product is avoided, and the performance of the steelmaking refining technology is comprehensively improved.
The application method of the VD furnace vacuum tank sealing ring protection device comprises the following steps:
s1, lifting and lowering a lifting control disc 4 through a lifting and lowering adjusting rod 16 on a temperature control box 14, so as to control a sealing tank cover 5 to lift and lower, wherein a sealing clamping groove 18 is formed in the bottom end of the lifting and lowering control disc 4, and the sealing clamping groove 18 is clamped at the edge of a vacuum tank body 1 of a refining furnace, so that a sealing effect is achieved; s2, a temperature measuring block 19 monitors the internal temperature of the vacuum tank body 1 of the refining furnace, the temperature is displayed on a temperature display disc 23, when the temperature is higher than a set value, a warning lamp 21 is turned on, at the moment, a control valve 28 on a gas control pipe I13 is controlled to be opened, argon is filled into the vacuum tank body 1 of the refining furnace, the internal temperature of the vacuum tank body 1 of the refining furnace is reduced, and when the actual internal temperature of the vacuum tank body 1 of the refining furnace is lower than the set value, the control valve 28 on the gas control pipe I13 is controlled to be closed, and the supply of the argon is stopped; s3, in the decarburization and denitrification process, controlling and opening a control valve 28 of a gas control pipe II 30 on a gas control pipe II 29, filling carbon dioxide into the refining furnace vacuum tank 1 from the bottom of molten steel, accelerating decarburization and denitrification of the molten steel, reducing production of a gas column, avoiding molten steel splashing and avoiding damaging a sealing ring; s4, the first gas adding pipe 9 supplies argon into the argon storage chamber 7, and the second gas adding pipe 10 supplies carbon dioxide into the carbon oxide storage chamber 8. The method comprises the steps of 1. Through the matching of the components such as the gas storage box, the argon storage chamber, the first gas adding pipe, the unidirectional gas charging pipe, the gas control pipe, the gas blocking pipe, the rotating rod, the control valve and the like, the method can conveniently and timely effectively cool the vacuum tank body of the refining furnace, firstly, the damage of high temperature to the sealing ring can be prevented, thereby influencing the normal use of the sealing ring, and secondly, the cooling of the vacuum tank body is accelerated, thereby improving the production efficiency of the device and the practicability of the device. 2. Adopt gas storage tank, carbon dioxide storage room, the second gas-filled pipe, one-way gas tube, gas control pipe, choke pipe, rotary rod and control valve cooperate, charge carbon dioxide from the molten steel bottom at decarbonization denitrogenation in-process, accelerate decarbonization denitrogenation to the molten steel, can reduce the production of gas column, avoid appearing the molten steel and splash, harm the sealing washer, also can avoid the molten steel to produce the gas column and lead to the molten steel to turn over and appear rolling up the sediment phenomenon, avoid appearing influencing the problem of product later quality.
According to the VD furnace vacuum tank sealing ring protection device and the use method thereof, the lifting sliding rod, the lifting control disc, the gas storage box, the argon storage chamber, the first gas adding pipe, the unidirectional gas charging pipe I, the gas control pipe I, the unidirectional gas charging pipe II, the gas control pipe II and other parts are effectively matched, so that the refining furnace vacuum tank is conveniently cooled in time, the damage of high temperature to the sealing ring can be prevented, the normal use of the sealing ring is influenced, and the cooling of the vacuum tank is accelerated, so that the production efficiency of the device is improved, and the practicability of the device is improved. The device 1 can fill argon into the tank body, and can timely cool the vacuum tank body of the refining furnace in the production process and after the treatment is finished, so that the VD tank body sealing ring is protected. 2. The device can also fill carbon dioxide from the molten steel bottom, carries out decarbonization denitrification operation to the molten steel, avoids appearing the molten steel and splashes, the problem of damage sealing washer, can also avoid the molten steel to appear the phenomenon of rolling up the sediment simultaneously, influences later stage product quality. According to the protection device and the use method of the vacuum tank sealing ring of the VD furnace, argon can be filled into the vacuum tank of the refining furnace at any time according to operation requirements, the periphery of the tank and the sealing ring is cooled in time, so that the VD tank sealing ring is protected, argon can be filled into the tank after production is finished, the sealing ring is cooled, in addition, carbon dioxide is blown in from the bottom of molten steel during production, decarburization and denitrification operation can be rapidly performed, gas columns in the molten steel are prevented, the phenomenon that the molten steel splashes onto the sealing ring to cause damage to the sealing ring is avoided, slag rolling of the molten steel is avoided, the quality of later products is prevented from being influenced, and the overall performance of steelmaking refining equipment is comprehensively improved.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the specific implementation of the invention is not limited by the foregoing, but rather is within the scope of the invention as long as various modifications are made by the method concept and technical scheme of the invention, or the concept and technical scheme of the invention are directly applied to other occasions without modification.
Claims (10)
1. The utility model provides a VD stove vacuum tank body sealing washer protection device which characterized in that: comprises a refining furnace vacuum tank body (1), a lifting sliding rod (2) is fixedly arranged at the top end of one side of the refining furnace vacuum tank body (1), a limiting ring (3) is fixedly arranged at the top end of one side of the lifting sliding rod (2), a lifting control disc (4) is fixedly arranged on the surface of the lifting sliding rod (2), a sealing tank cover (5) is arranged on one side of the lifting control disc (4), a gas storage box (6) is arranged at the bottom end of the refining furnace vacuum tank body (1), a gas isolation plate (11) is fixedly arranged in the gas storage box (6), the gas isolation plate (11) divides the inner part of the gas storage box (6) into an argon storage chamber (7) and a carbon dioxide storage chamber (8), one side of the argon storage chamber (7) is communicated with a first gas adding pipe (9), one side of the carbon dioxide storage chamber (8) is communicated with a second gas adding pipe (10), the argon storage chamber (7) is communicated with a unidirectional gas charging pipe I (12), a gas control pipe I (13) is arranged on the unidirectional gas charging pipe I (12), the unidirectional gas storage pipe I (12) is communicated with the refining furnace vacuum tank body (1), a carbon dioxide storage chamber (8) is communicated with the unidirectional gas charging pipe II (29), the unidirectional gas storage chamber II (29) is communicated with the unidirectional gas charging pipe II (29), the diameter of the cross section of the lifting control disc (4) is larger than that of the cross section of the lifting sliding rod (2), the lifting control disc (4) is movably sleeved with the lifting sliding rod (2), the lifting control disc (4) is fixedly connected with the sealing tank cover (5), the gas control tube I (13) and the gas control tube II (30) are respectively provided with a gas blocking tube (26), one side of the gas blocking tube (26) is provided with a rotating rod (27), and one side of the rotating rod (27) is provided with a control valve (28).
2. The VD furnace vacuum can sealing ring protection device according to claim 1, wherein: the top end of one side of the lifting control disc (4) is fixedly provided with a temperature control box (14), one side of the temperature control box (14) is provided with a rotating shaft (15), one side of the rotating shaft (15) is provided with a lifting adjusting rod (16), and the surface of the lifting adjusting rod (16) is provided with a heat insulation pad (17).
3. The VD furnace vacuum can sealing ring protection device according to claim 2, wherein: the sealing clamping groove (18) is formed in the bottom end of one side of the lifting control disc (4), the temperature measuring block (19) is fixedly installed on one side of the lifting control disc (4) away from the temperature control box (14), the cross section width of the sealing clamping groove (18) is larger than that of the surface of the vacuum tank body (1) of the refining furnace, the sealing clamping groove (18) is movably clamped with the vacuum tank body (1) of the refining furnace, and the power box (20) is fixedly installed on the top end of one side of the temperature control box (14) away from the rotating shaft (15).
4. A VD furnace vacuum tank sealing ring protection device according to claim 3, wherein: the temperature control box (14) top fixed mounting warning light (21), temperature control box (14) front one side top installation power supply controller (22), power supply controller (22) one side fixed mounting temperature display disc (23), temperature display disc (23) bottom fixed mounting regulation setting dish (24), regulation setting dish (24) surface mounting sets up key (25).
5. The VD furnace vacuum can sealing ring protection device according to claim 1 or 4, wherein: lifting slide bar (2) one side top fixed mounting spacing ring (3), lifting slide bar (2) surface demountable installation lifting control disk (4), lifting control disk (4) one side demountable installation sealed tank cover (5), refining furnace vacuum tank body (1) bottom demountable installation gas storage case (6).
6. The VD furnace vacuum can sealing ring protection device according to claim 5, wherein: the gas storage box (6) is internally and fixedly provided with a gas separation plate (11), the unidirectional gas charging pipe I (12) is fixedly provided with a gas control pipe I (13), and the unidirectional gas charging pipe II (29) is fixedly provided with a gas control pipe II (30).
7. The VD furnace vacuum can sealing ring protection device according to claim 6, wherein: the lifting control panel (4) is movably sleeved with the lifting sliding rod (2), the lifting control panel (4) is connected with the sealing tank cover (5) in a driven connection mode, and a rotating shaft (15) is detachably arranged on one side of the temperature control box (14).
8. The VD furnace vacuum can sealing ring protection device according to claim 1 or 2, wherein: the gas control pipe I (13) one side demountable installation hinder trachea (26), hinder trachea (26) one side top demountable installation rotary rod (27), rotary rod (27) one side demountable installation control valve (28).
9. The VD furnace vacuum can sealing ring protection device according to claim 1 or 2, wherein: the gas control pipe II (30) one side demountable installation hinders trachea (26), hinder trachea (26) one side top demountable installation rotary rod (27), rotary rod (27) one side demountable installation control valve (28).
10. The method for using the VD furnace vacuum can sealing ring protection device according to any of claims 1 to 9, wherein: the application method of the VD furnace vacuum tank sealing ring protection device comprises the following steps:
s1, lifting and lowering a lifting control disc (4) through a lifting and lowering adjusting rod (16) on a temperature control box (14), so as to control a sealing tank cover (5) to lift, wherein a sealing clamping groove (18) is formed in the bottom end of the lifting control disc (4), and the sealing clamping groove (18) is clamped at the edge of a vacuum tank body (1) of a refining furnace, so that a sealing effect is achieved;
s2, monitoring the internal temperature of the vacuum tank body (1) of the refining furnace by a temperature measuring block (19), displaying the temperature on a temperature display disc (23), when the temperature is higher than a set value, lighting a warning lamp (21), controlling to start a control valve (28) on a gas control pipe I (13), filling argon into the vacuum tank body (1) of the refining furnace, cooling the internal part of the vacuum tank body (1) of the refining furnace, and when the actual internal temperature of the vacuum tank body (1) of the refining furnace is lower than the set value, controlling the control valve (28) on the gas control pipe I (13) to be closed, and stopping argon supply;
s3, in the decarburization and denitrification process, a control valve (28) of a gas control pipe II (30) on a gas control pipe II (29) is controlled to be opened, carbon dioxide is filled into the refining furnace vacuum tank body (1) from the bottom of molten steel, decarburization and denitrification of the molten steel are accelerated, production of a gas column is reduced, molten steel splashing is avoided, and a sealing ring is prevented from being damaged;
s4, the first gas adding pipe (9) supplies argon into the argon storage chamber (7), and the second gas adding pipe (10) supplies carbon dioxide into the carbon oxide storage chamber (8).
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| JP2000080411A (en) * | 1998-08-31 | 2000-03-21 | Nippon Steel Corp | Method for refining high purity molten steel |
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| CN101384735A (en) * | 2006-02-09 | 2009-03-11 | 杰富意钢铁株式会社 | Method of denitrifying molten steel |
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| JP2016183385A (en) * | 2015-03-26 | 2016-10-20 | Ｊｆｅスチール株式会社 | Method of melting low nitrogen steel |
| CN108588338A (en) * | 2018-03-20 | 2018-09-28 | 北京科技大学 | A kind of VD stoves utilize CO2The method for making steel denitrogenation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000080411A (en) * | 1998-08-31 | 2000-03-21 | Nippon Steel Corp | Method for refining high purity molten steel |
| JP2003041317A (en) * | 2001-07-27 | 2003-02-13 | Nippon Steel Corp | Device and method for sealing hole for charging alloy and auxiliary material in vacuum refining furnace |
| CN101384735A (en) * | 2006-02-09 | 2009-03-11 | 杰富意钢铁株式会社 | Method of denitrifying molten steel |
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| JP2016183385A (en) * | 2015-03-26 | 2016-10-20 | Ｊｆｅスチール株式会社 | Method of melting low nitrogen steel |
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