CN101649374B - Swirl flow nozzle of refining furnace - Google Patents
Swirl flow nozzle of refining furnace Download PDFInfo
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- CN101649374B CN101649374B CN2008100225688A CN200810022568A CN101649374B CN 101649374 B CN101649374 B CN 101649374B CN 2008100225688 A CN2008100225688 A CN 2008100225688A CN 200810022568 A CN200810022568 A CN 200810022568A CN 101649374 B CN101649374 B CN 101649374B
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- oxygen
- swirl flow
- refining furnace
- mouth
- gas injection
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- 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
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Abstract
The invention provides a swirl flow nozzle of a refining furnace and relates to a swirl flow top lance of the refining furnace. A nozzle body is provided with an oxygen jet orifice which is expanded with a taper and gas jet orifices arranged around the oxygen jet orifice; the gas jet orifices and the axis of the nozzle body form a certain angle on an axial section; and the oxygen jet orifice is connected with an oxygen tube through a throat. The swirl flow nozzle is characterized in that the gas jet orifices deflect 2 to 5 degrees relative to the axis of the body. Over six gas jet orifices are arranged, and the gas jet orifices deflect 3.5 degrees relative to the axis of the body. The swirl flow nozzle has the advantages of increasing gas supply and improving use efficiency, simultaneously shortening service time of the top lance, prolonging life time of the top lance, improving production efficiency of a steel mill, increasing jet velocity of oxygen, avoiding back flow caused by oxygen jetted from the inner wall of a lance head oxygen opening impacting the steel slag surface, and improving mach number of gas flow on the exit.
Description
Technical field
The present invention relates to a kind of refining furnace eddy flow top rifle, relate in particular to the improvement of RH refining furnace eddy flow top lance spray nozzle.
Background technology
The RH swirl flow nozzle of refining furnace is the key position of RH refining furnace eddy flow top rifle, and RH refining furnace eddy flow top rifle is the important step of the concise system of RH molten steel vacuum cycle, and RH refining furnace eddy flow top rifle has multiple functions such as burning intensification, oxygen decarburization.RH molten steel vacuum cycle refining unit almost can refining the steel grade of refining in distress, comprise ultrapure steel, ultrapure ultra low-carbon steel, ultrapure low carbon stainless steel, provide molten steel by electric furnace (or converter), but after refining, provide composition and the well behaved high-quality molten steel of the satisfactory continuous casting of temperature for continuous casting, being the metropolis link of forming a connecting link in the advanced metallurgical technology of modern " large-scale iron and steel enterprise " " converter-refining-continuous casting ", also is the important step of optimizing the process for making flow process.
RH refining furnace eddy flow top rifle is to be improved by RH refining furnace MFB top rifle, former MFB top rifle rifle head gas aperture is 6 equally distributed straight holes of annular, gas supply is insufficient in the actual use, duration of service is very long when removing the residual knurl of internal vacuum chamber, reduce top rifle work-ing life greatly, reduce steel mill's production efficiency.In addition, the former MFB top rifle rifle head length phase can be in the inner problems such as indenture, the obstruction of rifle head that form of rifle head after using.Analyzing and find that cause the reason of above problem to be respectively: gas supply is insufficient, mainly is because the mixed effect of coal gas and oxygen is poor, makes that burning is insufficient, is prone to residual knurl at internal vacuum chamber; Indenture mainly is because air-flow ejection back forms gas backstreaming easily, thereby causes high temperature in rifle head inside; It equally also is because slag is taken back in gas backstreaming that the rifle head stops up, and causes slag to adhere to, thereby stops up the rifle head.
Summary of the invention
The present invention is directed to above problem, a kind of change nozzle structure shape, structure are provided, thereby have improved the shower nozzle use properties, improve the refining furnace shower nozzle of shower nozzle efficient.
Technical scheme of the present invention is: head body is provided with the oxygen spray mouth that is the tapering expansion, the gas injection mouth that centers on the setting of oxygen spray mouth, the axis of gas injection mouth and head body has certain angle on axial section, the oxygen spray mouth links to each other by an aditus laryngis with oxygen channel, and described gas injection mouth is with respect to 2～5 ° of body axis deflections.
The projection line of described gas injection mouth axial line on the head body axial section and the tapering greater than the oxygen spray mouth of the angle of body axis.
Described gas injection mouth axial line on the head body axial section projection line and the angle of body axis be 8 °, the tapering of described oxygen spray mouth is 7 °.
The aditus laryngis that is communicated with oxygen channel and oxygen spray mouth is the hyperbolic line transition face.
Described gas injection mouth is laid more than 6, and the gas injection mouth is 3.5 ° with respect to the body axis deflection angle.
The present invention adopts gas injection mouth dextrorotation deflection certain angle, can also improve the feed rate of coal gas by increasing the diameter and the distributed quantity of expansion segment gas injection mouth simultaneously, improves service efficiency; Allow 3.5 ° of gas injection mouth dextrorotation, can allow coal gas and oxygen thorough mixing, form eddy flow, the hot-fluid that allows the top rifle spray like this covers bigger scope, promptly in the shorter time, finishes heating work, understand in this sense, the top rifle duration of service that its shortens, work-ing life of improving the top rifle, the production efficiency of the steel mill of having improved.In addition, reduce the angle of oxygen spray mouth, the speed in the time of increasing oxygen spray and go out avoids oxygen to run into the backflow that the slag face causes simultaneously when rifle head oxygen port inwall sprays; The aditus laryngis contraction section adopts the hyperbolic line face to come rounding off, and on the aditus laryngis critical surface, the pressure of gas can be easier to be converted into kinetic energy like this, thereby can improve the Mach number of exit air-flow; Increase the spray angle of expansion segment coal gas, can allow coal gas like this, can take away the part heat of rifle head during injection more near the rifle end surface, simultaneously more can with the oxygen thorough mixing.
Description of drawings
Fig. 1 is a structural representation of the present invention
1 is oxygen channel among the figure, the 2nd, and aditus laryngis, the 3rd, gas injection mouth, the 4th, body, the 5th, oxygen spray mouth.
Fig. 2 is an A-A sectional view among Fig. 1
Embodiment
The present invention as shown in Figure 1, 2, head body 4 is provided with the oxygen spray mouth 5 that is the tapering expansion, the gas injection mouth 3 that centers on 5 settings of oxygen spray mouth, gas injection mouth 3 has certain angle with the axis of head body 4 on axial section, oxygen spray mouth 5 links to each other by an aditus laryngis 2 with oxygen channel 1, and gas injection mouth 3 is with respect to 2～5 ° of the axis tilts of body 4.Gas injection mouth 3 is preferably laid more than 6 among the present invention, and gas injection mouth 3 is 3.5 ° with respect to body 1 axis tilt optimized angle.
The projection line of gas injection mouth 3 axial lines on head body 4 axial sections and the tapering greater than oxygen spray mouth 5 of the angle of body 4 axis.Gas injection mouth 3 axial lines on head body 4 axial sections projection line and the angle of body 4 axis be preferably 8 °, the tapering of oxygen spray mouth 5 is preferably 7 °.
The aditus laryngis 2 that is communicated with oxygen channel 1 and oxygen spray mouth 5 is the hyperbolic line transition face.
Claims (5)
1. swirl flow nozzle of refining furnace, head body is provided with the oxygen spray mouth that is the tapering expansion, the gas injection mouth that centers on the setting of oxygen spray mouth, the axis of gas injection mouth and head body has certain angle on axial section, the oxygen spray mouth links to each other by an aditus laryngis with oxygen channel, it is characterized in that described gas injection mouth is with respect to 2～5 ° of body axis dextrorotation direction deflections.
2. a kind of swirl flow nozzle of refining furnace according to claim 1 is characterized in that, the projection line of described gas injection mouth axial line on the head body axial section and the tapering greater than the oxygen spray mouth of the angle of body axis.
3. a kind of swirl flow nozzle of refining furnace according to claim 2 is characterized in that, described gas injection mouth axial line on the head body axial section projection line and the angle of body axis be 8 °, the tapering of described oxygen spray mouth is 7 °.
4. a kind of swirl flow nozzle of refining furnace according to claim 1 is characterized in that, the aditus laryngis that is communicated with oxygen channel and oxygen spray mouth is the hyperbolic line transition face.
5. according to claim 1,2,3 or 4 described a kind of swirl flow nozzle of refining furnace, it is characterized in that described gas injection mouth is laid more than 6, the gas injection mouth is 3.5 ° with respect to the body axis deflection angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100225688A CN101649374B (en) | 2008-08-14 | 2008-08-14 | Swirl flow nozzle of refining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100225688A CN101649374B (en) | 2008-08-14 | 2008-08-14 | Swirl flow nozzle of refining furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101649374A CN101649374A (en) | 2010-02-17 |
| CN101649374B true CN101649374B (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100225688A Active CN101649374B (en) | 2008-08-14 | 2008-08-14 | Swirl flow nozzle of refining furnace |
Country Status (1)
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| CN (1) | CN101649374B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101782240B (en) * | 2010-03-12 | 2011-08-10 | 苏州宝联重工股份有限公司 | Ignition burner of baking gun |
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- 2008-08-14 CN CN2008100225688A patent/CN101649374B/en active Active
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| Publication number | Publication date |
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| CN101649374A (en) | 2010-02-17 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Boji Spray System Co., Ltd., Jiangsu Prov. Assignor: Guan Xurong Contract record no.: 2011320001184 Denomination of invention: Swirl flow nozzle of refining furnace Granted publication date: 20101229 License type: Exclusive License Open date: 20100217 Record date: 20111215 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151215 Address after: Three 225200 swing Industrial Park, fairy town, Jiangdu District, Jiangsu, Yangzhou Patentee after: Boji Spray System Co., Ltd., Jiangsu Prov. Address before: 225200, Jiangsu Province, Jiangdu fairy town double fairy Road North Jiangsu Bo Spray System Co., Ltd. Patentee before: Guan Xurong |
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| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: The fairy town Jiangdu District Yangzhou city Jiangsu province 225200 Industrial Park on three Gemini Road No. 388 Patentee after: JIANGSU BOJI SPRAYING SYSTEMS HOLDING CO., LTD. Address before: Three 225200 swing Industrial Park, fairy town, Jiangdu District, Jiangsu, Yangzhou Patentee before: Boji Spray System Co., Ltd., Jiangsu Prov. |