CN110331256A - A kind of vacuum circulation degassing purifier that decarbonization rate can be improved - Google Patents
A kind of vacuum circulation degassing purifier that decarbonization rate can be improved Download PDFInfo
- Publication number
- CN110331256A CN110331256A CN201910732158.0A CN201910732158A CN110331256A CN 110331256 A CN110331256 A CN 110331256A CN 201910732158 A CN201910732158 A CN 201910732158A CN 110331256 A CN110331256 A CN 110331256A
- Authority
- CN
- China
- Prior art keywords
- cylindrical section
- section
- tedge
- comer
- vacuum chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- C21C7/04—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
- C21C7/10—Handling in a vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
A kind of vacuum circulation degassing purifier that decarbonization rate can be improved, including vacuum chamber, ladle, tedge, down-comer and argon blowing tube；Vacuum chamber is located at right above ladle, and tedge and down-comer are vertically arranged in vacuum chamber bottom, and tedge and down-comer bottom end nozzle immerse in the molten steel of ladle；Tedge inner surface of tube body uses Pyatyi hierarchic structure, is from top to bottom divided into outlet cylindrical section, exit conical section, intermediate throat cylindrical section, inlet arc section and entrance cylindrical section in the vertical direction；The bigger diameter end of the inlet arc section is connected with entrance cylindrical section upper end, the miner diameter end of inlet arc section is connected with intermediate throat's cylindrical section lower end, intermediate throat's cylindrical section upper end is connected with the miner diameter end of exit conical section, and the bigger diameter end of exit conical section is connected with outlet cylindrical section lower end；Argon blowing tube is connected with intermediate throat's cylindrical section lower end.Tedge of the invention can effectively be crushed Argon Bubble, further increase decarbonization rate, shorten refining time, reduce enterprise's production cost.
Description
Technical field
The invention belongs to metallurgical refining techniques fields, more particularly to a kind of vacuum circulation degassing that decarbonization rate can be improved
Purifier.
Background technique
Ultra-low-carbon steel has excellent processing performance and electromagnetic performance, is widely used in aerospace, electronics electricity
The multiple fields such as power and building machinery, and vacuum circulation degassing refining is then one of the critical process for producing ultra-low-carbon steel.
The decarburization principle of vacuum circulation degassing refining are as follows: equipment body is vacuum chamber, and vacuum chamber lower part is equipped with a rising
Pipe and a down-comer are blown into argon gas in the molten steel in constant riser upwards, drive in tedge when being vacuum-treated
Molten steel pours in vacuum chamber upwards；In decarbonizing process, response location is shared at three, and respectively Argon Bubble surface, vacuum chamber are free
Liquid level and vacuum chamber bath, and Argon Bubble surface is one of main response location；Under conditions of high-temperature low-pressure, in molten steel
Free carbon, oxygen promote reaction to generate CO gas, as gas is constantly spread into bubble, the molten steel of decarburization borrows it
Self weight flows back to ladle through down-comer, and the molten steel of non-decarburization constantly enters vacuum chamber from tedge again, to form continuous circulation, most
Reach the demand of liquid steel refining eventually.
But in actual production, the Argon Bubble being blown into tedge constantly can collide and gather in uphill process
And and then form large-size bubbles, and large-size bubbles are compared with small size bubbles, it is identical be blown into gas flow under, big ruler
The area of the reaction interface of very little bubble is smaller, this is unfavorable for the promotion of decarbonization rate.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of vacuum circulation degassing refining that decarbonization rate can be improved
Device, using completely new riser structural, the Argon Bubble that can be effectively crushed in tedge, to further increase decarburization speed
Rate, while shortening refining time, and then enterprise's production cost is effectively reduced.
To achieve the goals above, the present invention adopts the following technical scheme: a kind of vacuum cycle that decarbonization rate can be improved
Deaerate purifier, including vacuum chamber, ladle, tedge, down-comer and argon blowing tube；The vacuum chamber is located at right above ladle,
The tedge and down-comer are vertically arranged in vacuum chamber bottom, and the bottom end nozzle of tedge and down-comer immerses the steel of ladle
In liquid；The inner surface of tube body of the tedge uses Pyatyi hierarchic structure, is from top to bottom divided into outlet in the vertical direction
Cylindrical section, exit conical section, intermediate throat cylindrical section, inlet arc section and entrance cylindrical section；The major diameter of the inlet arc section
End is connected with entrance cylindrical section upper end, and the miner diameter end of inlet arc section is connected with intermediate throat's cylindrical section lower end, intermediate throat's circle
Shell of column upper end is connected with the miner diameter end of exit conical section, and the bigger diameter end of exit conical section is connected with outlet cylindrical section lower end；It is described
Argon blowing tube is connected with intermediate throat's cylindrical section lower end.
The diameter of the outlet cylindrical section is 550mm~750mm, the diameter of intermediate throat's cylindrical section be 300mm~
400mm, the diameter of entrance cylindrical section are 550mm~750mm, and the taper of exit conical section is 10 °~12 °, inlet arc section
Taper is 21 °~30 °.
The tube surfaces of the tedge and down-comer are provided with refractory material layer.
Beneficial effects of the present invention:
The vacuum circulation degassing purifier that decarbonization rate can be improved of the invention, using completely new riser structural,
The Argon Bubble that can be effectively crushed in tedge, to further increase decarbonization rate, while shortening refining time, and then effectively
Reduce enterprise's production cost.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of vacuum circulation degassing purifier that decarbonization rate can be improved of the invention；
Fig. 2 is the structural schematic diagram of tedge of the invention；
In figure, 1-vacuum chamber, 2-ladles, 3-tedges, 4-down-comers, 5-argon blowing tubes, 6-molten steel, 7-argon gas
Bubble, 31-outlet cylindrical sections, 32-exit conical sections, 33-intermediate throat cylindrical sections, 34-inlet arc sections, 35-entrances circle
Shell of column.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, 2, a kind of vacuum circulation degassing purifier that decarbonization rate can be improved, including vacuum chamber 1, ladle
2, tedge 3, down-comer 4 and argon blowing tube 5；The vacuum chamber 1 is located at right above ladle 2, and the tedge 3 and down-comer 4 are equal
It is vertically arranged in 1 bottom of vacuum chamber, the bottom end nozzle of tedge 3 and down-comer 4 immerses in the molten steel 6 of ladle 2；The tedge
3 inner surface of tube body uses Pyatyi hierarchic structure, is from top to bottom divided into outlet cylindrical section 31, outlet circle in the vertical direction
Bore section 32, intermediate throat cylindrical section 33, inlet arc section 34 and entrance cylindrical section 35；The bigger diameter end of the inlet arc section 34 with
35 upper end of entrance cylindrical section is connected, and the miner diameter end of inlet arc section 34 is connected with 33 lower end of centre throat cylindrical section, intermediate throat
33 upper end of cylindrical section is connected with the miner diameter end of exit conical section 32, the bigger diameter end of exit conical section 32 and outlet 31 lower end of cylindrical section
It is connected；The argon blowing tube 5 is connected with intermediate 33 lower end of throat's cylindrical section.
The diameter of the outlet cylindrical section 31 is 600mm, and the diameter of intermediate throat's cylindrical section 33 is 350mm, entrance cylinder
The diameter of section 35 is 600mm, and the taper of exit conical section 32 is 11 °, and the taper of inlet arc section 34 is 25 °.
The tube surfaces of the tedge 3 and down-comer 4 are provided with refractory material layer.
In the present embodiment, the molten steel 6 in ladle 2 is IF steel, and the depth that tedge 3 immerses molten steel 6 is 500mm, vacuum chamber 1
Interior vacuum degree is 130Pa, and argon blowing tube 5 is with 96m3Argon gas, the initial carbon of molten steel 6 are blown into the upward riser 3 of the gas flow of/h
Content is 300ppm.
Since there are certain pressure differences between the air pressure inside of vacuum chamber 1 and the atmospheric pressure of outside, the steel in ladle 2 can be made
Liquid 6 rises up into vacuum chamber 1, is initially entered in intermediate throat's cylindrical section 33 by the argon gas that argon blowing tube 5 is blown into, and form certain size
Argon Bubble 7, and then reduce the specific gravity of molten steel 6, at this time molten steel 6 can and Argon Bubble 7 be flowed up with certain flow velocity, due to
Stepped change is presented in the interior caliber of tedge 3, and molten steel 6 can form strong turbulence in tedge 3, at this time the Argon Bubble 7 in molten steel 6
Under the shear stress and itself asymmetric surface stress that can generate by strong turbulence, it is gradually broken into smaller Argon Bubble
7, and there is bigger gas liquid interfacial area between the Argon Bubble 7 of small size and molten steel 6, to effectively accelerate decarburizing reaction
It carries out, and the molten steel 6 of decarburization can borrow its self weight to flow back into ladle 2 through down-comer 4, to form continuous circulation.
With the progress of circulation refining process, when the carbon content of molten steel 6 reaches the setting value of 15ppm, refining terminates.And
Compared with the vacuum circulation degassing purifier of traditional structure, when the carbon content of molten steel 6 equally reaches the setting value of 15ppm,
The decarburization time that the present invention is spent effectively shortens 20%~30%.
The scope of patent protection that scheme in embodiment is not intended to limit the invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the patents of this case.
Claims (3)
1. a kind of vacuum circulation degassing purifier that decarbonization rate can be improved, including vacuum chamber, ladle, tedge, down-comer
And argon blowing tube；The vacuum chamber is located at right above ladle, and the tedge and down-comer are vertically arranged in vacuum chamber bottom, on
The bottom end nozzle of riser and down-comer immerses in the molten steel of ladle；It is characterized by: the inner surface of tube body of the tedge uses
Pyatyi hierarchic structure is from top to bottom divided into outlet cylindrical section, exit conical section, intermediate throat cylinder in the vertical direction
Section, inlet arc section and entrance cylindrical section；The bigger diameter end of the inlet arc section is connected with entrance cylindrical section upper end, entrance cone
The miner diameter end of section is connected with intermediate throat's cylindrical section lower end, the miner diameter end phase of intermediate throat's cylindrical section upper end and exit conical section
Even, the bigger diameter end of exit conical section is connected with outlet cylindrical section lower end；The argon blowing tube is connected with intermediate throat's cylindrical section lower end
It is logical.
2. a kind of vacuum circulation degassing purifier that decarbonization rate can be improved according to claim 1, it is characterised in that:
The diameter of the outlet cylindrical section is 550mm~750mm, and the diameter of intermediate throat's cylindrical section is 300mm~400mm, entrance circle
The diameter of shell of column is 550mm~750mm, and the taper of exit conical section is 10 °~12 °, the taper of inlet arc section is 21 °~
30°。
3. a kind of vacuum circulation degassing purifier that decarbonization rate can be improved according to claim 1, it is characterised in that:
The tube surfaces of the tedge and down-comer are provided with refractory material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910732158.0A CN110331256B (en) | 2019-08-09 | 2019-08-09 | Vacuum circulation degassing refining device capable of improving decarburization rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910732158.0A CN110331256B (en) | 2019-08-09 | 2019-08-09 | Vacuum circulation degassing refining device capable of improving decarburization rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110331256A true CN110331256A (en) | 2019-10-15 |
| CN110331256B CN110331256B (en) | 2021-03-02 |
Family
ID=68149015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910732158.0A Active CN110331256B (en) | 2019-08-09 | 2019-08-09 | Vacuum circulation degassing refining device capable of improving decarburization rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110331256B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024549A (en) * | 2001-09-28 | 2007-08-29 | 旭硝子株式会社 | Vacuum degassing apparatus for molten glass |
| CN104988285A (en) * | 2015-07-13 | 2015-10-21 | 北京科技大学 | Single pipe style multifunctional vacuum refining system and method thereof |
| CN107744732A (en) * | 2017-11-27 | 2018-03-02 | 北京石油化工学院 | A kind of tubular type micro-bubble generator |
| CN207498409U (en) * | 2017-11-08 | 2018-06-15 | 山东钢铁股份有限公司 | A kind of RH refining furnaces dip pipe |
-
2019
- 2019-08-09 CN CN201910732158.0A patent/CN110331256B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024549A (en) * | 2001-09-28 | 2007-08-29 | 旭硝子株式会社 | Vacuum degassing apparatus for molten glass |
| CN104988285A (en) * | 2015-07-13 | 2015-10-21 | 北京科技大学 | Single pipe style multifunctional vacuum refining system and method thereof |
| CN207498409U (en) * | 2017-11-08 | 2018-06-15 | 山东钢铁股份有限公司 | A kind of RH refining furnaces dip pipe |
| CN107744732A (en) * | 2017-11-27 | 2018-03-02 | 北京石油化工学院 | A kind of tubular type micro-bubble generator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110331256B (en) | 2021-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108148948B (en) | High-efficiency single-nozzle refining furnace and special steel smelting process | |
| CN103555889A (en) | Device and method for quickly removing occluded foreign substances in molten steel | |
| EP0556343A1 (en) | Jet flow device for injecting gas into molten metal. | |
| US3895937A (en) | Dynamic vacuum treatment to produce aluminum alloys | |
| JP5365241B2 (en) | Molten steel refining equipment | |
| CN204111805U (en) | A kind of RH equipment for vacuum refining with barricade | |
| CN201214672Y (en) | Single nozzle refining furnace | |
| CN110331256A (en) | A kind of vacuum circulation degassing purifier that decarbonization rate can be improved | |
| CN207498409U (en) | A kind of RH refining furnaces dip pipe | |
| US2399634A (en) | Handling molten magnesium | |
| JP2007031820A (en) | Vacuum-degassing treating method for molten steel | |
| CN109576447A (en) | A kind of RH purifier and method promoting the decarburization of molten steel depth | |
| CN107419064B (en) | Immersion jet dam ladle device and the method for improving RH molten steel internal circulating load | |
| CN113957203B (en) | Multifunctional non-centrosymmetric vacuum refining equipment | |
| CN205687963U (en) | RH vacuum tank flow-guiding type mass-impregnation pipe and equipment for vacuum refining thereof | |
| CN106521098A (en) | Vacuum tank device in RH refining device | |
| CN208995525U (en) | A kind of single mouth vacuum refining furnace with induction heating | |
| CN106119466B (en) | A kind of RH vacuum refining furnace and vacuum refining system | |
| RU2468092C2 (en) | Supply sleeve for degassing reservoir for metallurgical melts operating using rh method | |
| CN105886703B (en) | RH vacuum tanks flow-guiding type mass-impregnation pipe and its equipment for vacuum refining | |
| CN205874480U (en) | RH vacuum refining is round platform shape sleeve dip pipe for stove | |
| Bulatov et al. | Investigation of Pobeda Furnace Bubbling Zone Physics Using Cold Modeling Method. Part 2. Hydro-Gas Dynamics of Liquid Blowing by Gas Using Bottom Gas-Protected Lance | |
| CN106148642B (en) | A kind of liquid steel refining method using RH vacuum refining systems | |
| JPH0129857B2 (en) | ||
| CN207596896U (en) | Circular seam type is blown CO2And O2RH lift gas nozzles |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |