CN206157188U - Smelt oxygen rifle shower nozzle for ultra -low -carbon steel - Google Patents
Smelt oxygen rifle shower nozzle for ultra -low -carbon steel Download PDFInfo
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- CN206157188U CN206157188U CN201621199773.8U CN201621199773U CN206157188U CN 206157188 U CN206157188 U CN 206157188U CN 201621199773 U CN201621199773 U CN 201621199773U CN 206157188 U CN206157188 U CN 206157188U
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- shower nozzle
- welded tube
- orifice
- interior
- center
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Abstract
The utility model discloses a smelt oxygen rifle shower nozzle for ultra -low -carbon steel, including shower nozzle tip and a plurality of jet orifice on every side to and reach interior welded tube with the outer welded tube of shower nozzle tip outer wall, mesospore and inner wall welded, well welded tube respectively, and the jet orifice all feeds through with the external world with interior welded tube around a plurality of, the center part of shower nozzle tip has still seted up central orifice, the the central axis of center orifice is located on the the central axis of shower nozzle tip, just the center orifice all communicates with the interior welded tube and the external world. Because the existence of middle part orifice, can effectively offset the negative pressuren zone that shower nozzle tip central zone produced under the supersonic jet condition, guarantees five around the orifice efflux press A predetermined direction and spray, avoid the slag splash at the initial stage of smelting, and the further stirring energy who promotes the metal bath does all can and oxygen suppliment intensity, at smelting initial stage rapid heating up, change the sediment to improve and smelt efficiency, adopt the orifice structure of the slender acanthopanax same form, the oxygen flux is big to reach the smelting terminal point requirement of ultra -low -carbon steel fast.
Description
Technical field
This utility model is related to field of steel metallurgy, and in particular to a kind of smelting suprelow carbon steel oxygen gun sprayer.
Background technology
Ultra-low-carbon steel is often referred to the steel grade of carbon content≤0.03%, mainly include IF steel (gapless atomic steel) series,
ULCB (ultra-low-carbon bainite steel) series, SFCC (super-purity ferrite stainless steel) series and silicon steel and electrical sheet etc..
On the basis of our times Ferrous Metallurgy level of development, above steel grade is Ultra-low carbon clean steel category, production
Ultra-low-carbon steel is mainly smelted based on producing extremely low carbon content or ultralow carbon content molten steel by Converter Oxigen Blowing, by RH or VOD etc.
Operation further controls carbon content, so as to reach the purpose of production Ultra-low carbon clean steel.Therefore, converter smelting become production it is ultralow
The decisive basis of carbon steel, directly affects the treatment effect and efficiency of subsequent handling, or even the success or failure that decide production process.
The efficient smelting suprelow carbon steel of converter, needs higher oxygen supply intensity, splendid decarburizing reaction efficiency and rational slag materialization
Matter, and these factors are nearly all relevant with the structure of converter oxygen gun and application effect.
At home especially big section steel works application is more universal for 200 tonnes of mammoth conveters, the oxygen lance spraying of 200 tonnes of mammoth conveters
Head is evenly distributed type traditional structure for the hole of periphery five, there is problems with during use：
1) smelt that the initial stage is slag melting insufficient or molten speed is excessively slow, the negative pressuren zone of oxygen gun sprayer end central area generation is made
Into oxygen jet to off-centring, jet aggregation causes local assault power excessive, produces splash；
2) because traditional five holes shower nozzle oxygen supply by lance intensity is affected larger by stagnation oxygen pressure, during work oxygen buckling, supply
Oxygen intensity and efficiency will produce substantially fluctuation, influence process stability control；
3) reaction power of the traditional five holes shower nozzle oxygen rifle in decarburization end is not enough, to the interval efficiency for advancing of Ultra-low carbon not
Height, Ultra-low Carbon Molten Steel initial condition is not good, increases subsequent treatment burden, affects overall process efficiency.
The content of the invention
The purpose of this utility model is aiming at the deficiency of above-mentioned technology, there is provided one kind avoid the slag splash of smelting initial stage,
And the smelting suprelow carbon steel oxygen gun sprayer of raising efficiency.
For achieving the above object, the smelting suprelow carbon steel oxygen gun sprayer designed by this utility model, the oxygen gun sprayer
Including shower nozzle end and the multiple surrounding spray-holes being circumferentially evenly distributed on shower nozzle end, and respectively with shower nozzle end outside
Outer welded tube, middle welded tube and interior welded tube that wall, mesospore and inwall are welded, the middle lamellar spacing, middle welded tube between interior welded tube and middle welded tube
Outer lamellar spacing between outer welded tube is connected to form circulating water passage, and the interior lamellar spacing of interior welded tube is total oxygen path, and many
Individual surrounding spray-hole is connected with interior lamellar spacing and the external world, and the centre of the shower nozzle end is further opened with center of orifices, institute
The central axis for stating center of orifices is located on the central axis of the shower nozzle end, and the center of orifices and interior lamellar spacing and outward
Boundary connects.
Further, the angle α of the central axis of the center of orifices and the central axis of multiple surrounding spray-holes
Be 14.8 °～15.3 °, the exit face of multiple surrounding spray-holes and the angle β of the exit face of the center of orifices with
Angle α is equal.
Further, the surrounding spray-hole is five.
Compared with prior art, this utility model has advantages below：
1) due to the presence of shower nozzle end middle part spray orifice, shower nozzle end center under the conditions of supersonic jet can effectively be offset
The negative pressuren zone that domain produces, it is ensured that spray orifice jet is sprayed by predetermined direction around five, it is to avoid smelt the slag splash at initial stage；
2) around the central axis of center of orifices and five angle α of the central axis of spray-hole be 14.8 °～
15.3 °, more than the spray orifice inclination angle of traditional 200t converter oxygen guns, impact area can be expanded, add the presence of center of orifices, further
Stirring capacity and oxygen supply intensity to metal bath is lifted, is rapidly heated at the smelting initial stage, slugging, so as to improve efficiency；
3) using the jet orifice structure of the formula of slender acanthopanax one, oxygen flux is big, it is ensured that smelt the heating power of latter stage carbon oxygen sustained response
Learn and dynamic conditions, to be rapidly achieved the smelting endpoint requirement of ultra-low-carbon steel；
4) oxygen gun sprayer of this utility model big flow can coordinate 0.08m3/ more than tmin atm number bottom-blowing of converter, enters
One step improves efficiency and optimizes dephosphorization effect.
Description of the drawings
Fig. 1 is the cross section structure diagram of this utility model smelting suprelow carbon steel oxygen gun sprayer；
Fig. 2 is the A of Fig. 1 to schematic diagram.
Shower nozzle end 1, outer wall 2, mesospore 3, inwall 4, outer welded tube 5, middle welded tube 6, interior welded tube 7, outer lamellar spacing 8, middle interlayer
Gap 9, interior lamellar spacing 10, surrounding spray-hole 11, center of orifices 12.
Specific embodiment
Below in conjunction with the accompanying drawings the utility model is described in further detail with specific embodiment.
Smelting suprelow carbon steel oxygen gun sprayer as shown in Figure 1 and Figure 2, oxygen gun sprayer includes shower nozzle end 1 and circumferentially equal
The even multiple surrounding spray-holes 11 being distributed on shower nozzle end 1 (are provided with five equally distributed surrounding spray-holes in the present embodiment
11) outer welded tube 5, middle welded tube 6 and the interior welded tube 7 for, and respectively welding with the outer wall 2 of shower nozzle end 1, mesospore 3 and inwall 4, interior weldering
The outer lamellar spacing 8 between middle lamellar spacing 9, middle welded tube 6 and outer welded tube 5 between pipe 7 and middle welded tube 6 is connected to form recirculated water cooling
But therefrom lamellar spacing 9 enters for passage, i.e. cooling water, and therefrom lamellar spacing 9 and outer lamellar spacing 8 are flowed out, it is ensured that oxygen rifle working condition
It is stable, and the interior lamellar spacing 10 of interior welded tube 7 is that spray-hole 11 connects with interior lamellar spacing 10 and the external world around total oxygen path, and five
It is logical.Key point of the present utility model is：The centre of shower nozzle end 1 is further opened with center of orifices 12, the center of orifices 12
Central axis be located on the central axis of shower nozzle end 1, and center of orifices 12 and interior lamellar spacing 10 and extraneous connect；And
And, the central axis of center of orifices 12 with five around spray-hole 11 central axis angle α be 14.8 °～15.3 ° it is (excellent
Elect 15 ° as), meanwhile, around five the angle β of the exit face of spray-hole 11 and the exit face of center of orifices 12 with angle α phase
Deng.Under 0.9MPa work oxygen pressure conditions, spray-hole 11 meets jet Mach number phase with the structure of center of orifices 12 around five
Deng condition.
It is as follows with the process of oxygen gun sprayer smelting suprelow carbon steel using this utility model smelting suprelow carbon steel：
1) oxygen gun sprayer and gun body are welded, it is ensured that welding junction is smooth, sealing is good, oxygen rifle is loaded lift afterwards
System；
2) when smelting low-temperature low-silicon molten iron in 200t converters, after steel scrap and molten iron total amount about 200t are blended into into stove, press
Repeatedly a small amount of principle adds active lime, special oxygen rifle to start blowing, and rifle position keeps when smelting common molten iron with conventional oxygen rifle
Unanimously, about 1.8m or so, bottom blowing intensity is initially controlled in 0.05～0.06Nm3/t·min.This state maintains about 120-150s,
The smelting stage is smelted into mid-term；
3) mid-term is being smelted, furnace charge can be coordinated to add integrated status in operation and stove, rifle is being adjusted between 1.6～1.8m
Position, in stable smelting phase rifle position 1.65m is maintained at, blowing total time to 850～900s, into the smelting endpoint metamorphosis stage,
This stage bottom blowing intensity is controlled in 0.08Nm3/ tmin or so；
4) smelting endpoint metamorphosis stage and end in smelting, control of lance position stirred by force molten bath in 1.55m or so
Deep decarburization is mixed and stirred, bottom blowing flow increases to 0.1Nm3The level of/tmin, so that molten bath carbon oxygen reaches poised state, finally surveys
Temperature, sampling, rise rifle tapping, and smelting endpoint molten steel carbon content is below 0.04%, more than 1650 DEG C of temperature.
In sum：Due to the presence of the middle part spray orifice 12 of shower nozzle end 1, supersonic jet condition lower nozzle can be effectively offset
The negative pressuren zone that the central area of end 1 produces, it is ensured that the jet of spray orifice 11 is sprayed by predetermined direction around five, it is to avoid smelt the initial stage
Slag splash；Around the central axis of center of orifices 12 and five angle α of the central axis of spray-hole 11 be 14.8 °～
15.3 ° (preferably 15 °), more than the spray orifice inclination angle of traditional 200t converter oxygen guns, can expand impact area, add center of orifices
Exist, further lift the stirring capacity and oxygen supply intensity to metal bath, be rapidly heated at the smelting initial stage, slugging, so as to carry
High efficiency；Using the jet orifice structure of the formula of slender acanthopanax one, oxygen flux is big, it is ensured that smelt the heating power of latter stage carbon oxygen sustained response
Learn and dynamic conditions, to be rapidly achieved the smelting endpoint requirement of ultra-low-carbon steel, smelting can be reached in practice within the 900s times
Terminal, endpoint carbon content is below 0.04%, temperature reaches more than 1650 DEG C, is that follow-up RH operations further control carbon content and carry
For composition and temperature basis；In addition, the oxygen gun sprayer of this utility model big flow can coordinate 0.08m3/ more than tmin atm numbers
Bottom-blowing of converter, further improves efficiency and optimizes dephosphorization effect.
Claims (3)
1. a kind of smelting suprelow carbon steel oxygen gun sprayer, the oxygen gun sprayer includes shower nozzle end (1) and is circumferentially uniformly distributed
Spray-hole (11) around multiple on shower nozzle end (1), and respectively with shower nozzle end (1) outer wall (2), mesospore (3) and interior
Outer welded tube (5), middle welded tube (6) and interior welded tube (7) that wall (4) is welded, the middle lamellar spacing between interior welded tube (7) and middle welded tube (6)
(9), the outer lamellar spacing (8) between middle welded tube (6) and outer welded tube (5) is connected to form circulating water passage, interior welded tube (7)
Interior lamellar spacing (10) is total oxygen path, and multiple surrounding spray-holes (11) are connected with interior lamellar spacing (10) and the external world, and its feature exists
In：The centre of the shower nozzle end (1) is further opened with center of orifices (12), the central axis position of the center of orifices (12)
On the central axis of the shower nozzle end (1), and the center of orifices (12) is connected with interior lamellar spacing (10) and the external world.
2. smelting suprelow carbon steel oxygen gun sprayer according to claim 1, it is characterised in that：In the center of orifices (12)
Heart axis is 14.8 °～15.3 ° with the angle α of the central axis of multiple surrounding spray-holes (11), multiple surroundings
The exit face of spray-hole (11) is equal with angle α with the angle β of the exit face of the center of orifices (12).
3. smelting suprelow carbon steel oxygen gun sprayer according to claim 1 or claim 2, it is characterised in that：The surrounding spray-hole
(11) it is five.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199773.8U CN206157188U (en) | 2016-11-07 | 2016-11-07 | Smelt oxygen rifle shower nozzle for ultra -low -carbon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199773.8U CN206157188U (en) | 2016-11-07 | 2016-11-07 | Smelt oxygen rifle shower nozzle for ultra -low -carbon steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206157188U true CN206157188U (en) | 2017-05-10 |
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ID=58657658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621199773.8U Expired - Fee Related CN206157188U (en) | 2016-11-07 | 2016-11-07 | Smelt oxygen rifle shower nozzle for ultra -low -carbon steel |
Country Status (1)
| Country | Link |
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| CN (1) | CN206157188U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115627317A (en) * | 2022-10-20 | 2023-01-20 | 山东钢铁集团日照有限公司 | Oxygen lance nozzle and method for shortening smelting period of converter |
-
2016
- 2016-11-07 CN CN201621199773.8U patent/CN206157188U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115627317A (en) * | 2022-10-20 | 2023-01-20 | 山东钢铁集团日照有限公司 | Oxygen lance nozzle and method for shortening smelting period of converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170630 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: WUHAN IRON AND STEEL Co.,Ltd. Address before: 430083 Qingshan District, Hubei, Wuhan Patentee before: WUHAN IRON AND STEEL Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20211107 |