CN201250248Y - Spray nozzle for refining furnace - Google Patents
Spray nozzle for refining furnace Download PDFInfo
- Publication number
- CN201250248Y CN201250248Y CNU2008200386539U CN200820038653U CN201250248Y CN 201250248 Y CN201250248 Y CN 201250248Y CN U2008200386539 U CNU2008200386539 U CN U2008200386539U CN 200820038653 U CN200820038653 U CN 200820038653U CN 201250248 Y CN201250248 Y CN 201250248Y
- Authority
- CN
- China
- Prior art keywords
- oxygen
- jet orifice
- coal gas
- refining furnace
- mouth
- 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.)
- Expired - Fee Related
Links
- 239000007921 spray Substances 0.000 title claims abstract description 27
- 238000007670 refining Methods 0.000 title claims abstract description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 43
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 43
- 239000001301 oxygen Substances 0.000 claims abstract description 43
- 239000007789 gas Substances 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000003034 coal gas Substances 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 239000002893 slag Substances 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract 2
- 230000007704 transition Effects 0.000 abstract 2
- 238000009749 continuous casting Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000009429 distress Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
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- Nozzles (AREA)
Abstract
A spray nozzle for a refining furnace relates to a rotational flow top lance of the refining furnace. The oxygen jet orifice is expanded in a taper manner, and the coal gas jet orifice is arranged around the oxygen jet orifice, the coal gas jet orifice and the axis of the nozzle body form a certain included angle on the axial section, the oxygen jet orifice is connected with the oxygen pipeline through a throat, and the included angle of the coal gas jet orifice and the axis of the nozzle body on the axial section is larger than the taper of the oxygen jet orifice; the throat opening communicating the oxygen pipeline and the oxygen jet opening is an arc transition surface. The utility model can reduce the energy and increase the speed of oxygen when spraying, and simultaneously avoid the backflow caused by the oxygen hitting the steel slag surface when spraying along the inner wall of the oxygen port of the gun head; the throat contraction section adopts a hyperbolic surface for smooth transition, the pressure of the gas is easily converted into kinetic energy, and the Mach number of the gas flow at the outlet can be improved; the injection angle of the coal gas at the expansion section is increased, so that the coal gas is closer to the end face of the gun head, partial heat of the gun head can be taken away during injection, and the coal gas can be fully mixed with oxygen.
Description
Technical field
The utility model relates to a kind of refining furnace eddy flow top rifle, relates 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, can be in the inner problems such as indenture, the obstruction of rifle head that form of rifle head after the use of former MFB top rifle rifle head length phase.Analyze and find, cause the reason of above problem to be respectively: 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.
The utility model content
The utility model provides a kind of change nozzle structure parameter, thereby has improved the shower nozzle behaviour in service at above problem, prolongs the shower nozzle refining furnace shower nozzle in work-ing life.
The technical solution of the utility model 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 the angle of axis angle on axial section of described gas injection mouth and head body is greater than the tapering of oxygen spray mouth; The aditus laryngis that is communicated with oxygen channel and oxygen spray mouth is the excessive face of arc.
The angle of described gas injection mouth and body axis is 8 °, and the tapering of described oxygen spray mouth is 7 °.
The excessive face of the arc of described aditus laryngis is hyperbolic shape on axial cross section.
The utility model reduces the angle of oxygen spray mouth, and 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
Accompanying drawing is a structural representation of the present utility model
1 is body among the figure, the 2nd, and gas injection mouth, the 3rd, aditus laryngis, the 4th, oxygen spray mouth.
Embodiment
The utility model as shown in drawings, head body 1 is provided with the oxygen spray mouth 4 that is the tapering expansion, the gas injection mouth 2 that centers on 4 settings of oxygen spray mouth, gas injection mouth 2 has certain angle with the axis of head body 1 on axial section, oxygen spray mouth 4 links to each other by an aditus laryngis 3 with oxygen channel, and the angle of axis angle on axial section of gas injection mouth 2 and head body 1 is greater than the tapering of oxygen spray mouth 4; The aditus laryngis 3 that is communicated with oxygen channel and oxygen spray mouth 4 is the excessive face of arc.
Gas injection mouth 2 is 8 ° with the angle of body 1 axis, and the tapering of oxygen spray mouth 4 is 7 °.
The excessive face of the arc of aditus laryngis 3 is hyperbolic shape on axial cross section.
Reduce the tapering of expansion segment oxygen spray mouth, and increased the angle between expansion segment gas injection mouth and the axis; Add and adopt the hyperbolic line face to come rounding off the aditus laryngis contraction section, overcome phenomenons such as ablation in the shower nozzle that occurs easily in the prior art, shower nozzle obstruction effectively.
Claims (3)
1, refining furnace shower nozzle, 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 the angle of axis angle on axial section of described gas injection mouth and head body is greater than the tapering of oxygen spray mouth; The aditus laryngis that is communicated with oxygen channel and oxygen spray mouth is the excessive face of arc.
2, refining furnace shower nozzle according to claim 1 is characterized in that, the angle of described gas injection mouth and body axis is 8 °, and the tapering of described oxygen spray mouth is 7 °.
3, refining furnace shower nozzle according to claim 1 is characterized in that, the excessive face of the arc of described aditus laryngis is hyperbolic shape on axial cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200386539U CN201250248Y (en) | 2008-08-14 | 2008-08-14 | Spray nozzle for refining furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200386539U CN201250248Y (en) | 2008-08-14 | 2008-08-14 | Spray nozzle for refining furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201250248Y true CN201250248Y (en) | 2009-06-03 |
Family
ID=40745920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200386539U Expired - Fee Related CN201250248Y (en) | 2008-08-14 | 2008-08-14 | Spray nozzle for refining furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201250248Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115491467A (en) * | 2022-10-08 | 2022-12-20 | 首钢股份公司迁安钢铁公司 | Top lance head and molten steel heating method |
-
2008
- 2008-08-14 CN CNU2008200386539U patent/CN201250248Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115491467A (en) * | 2022-10-08 | 2022-12-20 | 首钢股份公司迁安钢铁公司 | Top lance head and molten steel heating method |
| CN115491467B (en) * | 2022-10-08 | 2024-07-09 | 首钢股份公司迁安钢铁公司 | Heating method for top gun head and molten steel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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.: 2011320001180 Denomination of utility model: Spray nozzle of refining furnace Granted publication date: 20090603 License type: Exclusive License Record date: 20111215 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 Termination date: 20150814 |
|
| EXPY | Termination of patent right or utility model |