CN2740619Y - Nozzle of refined oxygen gun - Google Patents
Nozzle of refined oxygen gun Download PDFInfo
- Publication number
- CN2740619Y CN2740619Y CN 200420097466 CN200420097466U CN2740619Y CN 2740619 Y CN2740619 Y CN 2740619Y CN 200420097466 CN200420097466 CN 200420097466 CN 200420097466 U CN200420097466 U CN 200420097466U CN 2740619 Y CN2740619 Y CN 2740619Y
- Authority
- CN
- China
- Prior art keywords
- oxygen
- oxygen blowing
- hole
- welded tube
- blow head
- 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
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The utility model discloses a nozzle of refined oxygen gun, relating to the smelting equipment unit for steel. The utility model comprises an end face of the nozzle, an outer welded pipe, a middle welded pipe, and an inner welded pipe; the outer welded pipe is a water outlet pipe; the middle welded pipe is a water inlet pipe; the inner welded pipe is an oxygen blowing pipe; the utility model is characterized in that an oxygen blowing hole 8 is a convergent-divergent hole; the rate of areas of a throat opening 9 and an outlet 7 is between 1. 418-1. 919; the pitch angle d degree of the oxygen blowing hole 8 is between 8 degrees-27 degrees; or, the pitch angle d degree adopted by the oxygen blowing hole 8 is between 8 degrees-27 degrees and the mach number of the oxygen blowing hole 8 is 1; the oxygen blowing hole 8 can be reasonably designed according to different shapes of the ladle or the types of furnace; the hole number of the oxygen blowing holes is 2-8; the oxygen blowing holes are arranged by adopting the symmetry or asymmetrical form; the sizes and the number can be determined according to the smelting condition, so as to achieve the purposes of broad oxygen blowing areas and uniform stir.
Description
Technical field
The utility model relates to the smelting equipment parts of steel, specifically makes steel the refining oxygen lance blow head of usefulness.
Background technology
Molten steel furnace external refining is the raising for the variety and quality that adapts to steel, producing new steel grade and production process rationalizes, be the strict demand indispensable operation of continuous casting, become the important step in modern steel-making, the continuous casting production linkings such as molten steel composition, temperature, purity and times.
The purpose of external refining is: carry out dark decarburization, desulfurization, deoxidation, degasification, adjustment composition (microalloying) and adjustment temperature and make its homogenizing under vacuum, inert atmosphere or controlled atmosphere condition, remove inclusion, change inclusion morphology and composition etc.
The utility model content
The refining oxygen lance blow head is that it will be more extensive using the oxygen blast technology in the refining process along with the further embodiment of vacuum oxygen technological merit with to the increase of ultra-clean steel demand.
The utility model discloses a kind of structure of refining oxygen lance blow head, comprise shower nozzle end face, outer welded tube, middle welded tube and interior welded tube, outer welded tube is a rising pipe, middle welded tube is a water inlet pipe, interior welded tube is an oxygen lance, it is characterized in that the oxygen blast hole is the hole, Lavalle, aditus laryngis and outlet area are than between 1.418～1.919, and oxygen blast hole inclination angle d ° between 8 °～27 °.
The utility model discloses the structure of another kind of refining oxygen lance blow head, comprise shower nozzle end face, outer welded tube, middle welded tube and interior welded tube, outer welded tube is a rising pipe, and middle welded tube is a water inlet pipe, interior welded tube is an oxygen lance, and the inclination angle that it is characterized in that oxygen blast hole Mach 2 ship 1 is between 8 °～27 °.
The utility model refining oxygen lance blow head is that with the key distinction of general oxygen lance blow head oxygen supply intensity is smaller than general coverter pig oxygen rifle, the oxygen blast hole can adopt inclination angle d ° of Mach 2 ship 1 between 8 °～27 °, can reasonably design according to the different shapes of the ladle or the type of furnace, oxygen blast hole hole count is 2～8 holes, adopt symmetry or asymmetric two kinds of arranged in form oxygen blast holes, size and quantity can be determined according to the smelting situation.To make every effort to reach the purpose that the oxygen blast area is wide, stir.
Description of drawings
Fig. 1 is the cross-sectional schematic of the utility model refining oxygen lance blow head structure;
Fig. 2 is that the A of Fig. 1 is to view.
Among the figure: 1, shower nozzle end face; 2, outer welded tube; 3, middle welded tube; 4, interior welded tube; 5, constant current seam; 6, heatproof protective layer; 7, outlet; 8, oxygen blast hole; 9, aditus laryngis.
D ° is the main aperture inclination angle.
Embodiment
The utility model refining oxygen lance blow head as shown in Figure 1, 2, comprise shower nozzle end face 1, outer welded tube 2, middle welded tube 3 and interior welded tube 4, outer welded tube 2 is a rising pipe, middle welded tube 3 is a water inlet pipe, interior welded tube 4 is an oxygen lance, oxygen blast hole 8 is the hole, Lavalle, and aditus laryngis 9 and outlet 7 areas are than between 1.418～1.919, and oxygen blast hole 8 inclination angle d ° between 8 °～27 °.Or the inclination angle of oxygen blast hole 8 Mach 2 ships 1 is between 8 °～27 °.Oxygen blast hole 8 hole counts are 2～8 holes, adopt symmetry or unsymmetric form to arrange.
Refining is molten steel with oxygen lance blow head owing to what blow, thereby does not need very big oxygen supply intensity, again because ladle is oval and molten steel is superficial, so selected Mach 2 ship 1 uses two oxygen rifles to blow simultaneously, to adapt to the special shape of Long Circle ladle.Shower nozzle just must be designed to uniform three holes in 180 ° like this, and the special construction of atresia in other 180 °.Oxygen blast hole 8 inclination angle d ° between 8 °～27 °.In welded tube 3 with outer welded tube 2 designs when selected, main consideration must make into water circumferential weld area greater than water outlet circumferential weld area, to reduce the pressure-losses of water coolant in the circumferential weld of intaking.The design of water inlet flow velocity goes out the water flow velocity design about 6 meter per seconds about 5 meter per seconds.By the refining oxygen lance blow head of this conceptual design, obtained metallurgical effect preferably in actual use.
Consider oxygen lance blow head structures shape in converting process; aditus laryngis 9 and inclination angle d ° does not have big variation; if the outlet 7 in the oxygen blast hole 8 of shower nozzle is concordant with shower nozzle end face 1; during blowing; outlet 7 directly contacts with molten steel; be subjected to washing away and radiation effect of high-temperature molten steel; the geometrical dimension and the shape of outlet 7 often comparatively fast change; generally show as outlet 7 peripheral scaling loss or crack; export 7 parameters off-design parameter; cause jet dynamically can not meet design requirement; take out between the stream thigh and draw increasing; interfere with each other; penetrating stirring capacity weakens; it is slow to change slag; effectively impact area reduces; the duration of blast lengthening; shower nozzle shortens work-ing life; have a strong impact on the overall economic efficiency of steel-making; structure as the preferred embodiment of the utility model refining oxygen lance blow head; as depicted in figs. 1 and 2; preferably between the outlet 7 in the oxygen blast hole 8 on the shower nozzle end face 1 and shower nozzle end face 1, be provided with constant current seam 5; between outlet 7 and the constant current seam 5 segment distance is arranged, promptly export 7, a segment distance is arranged apart from shower nozzle end face 1 to shower nozzle end face 1 indent; generally can recessed 2～12mm; its diameter is than the big 2～18mm of outlet 7 diameters, can effectively avoid high-temperature molten steel to exporting 7 directly wash away and thermal radiation, plays a protective role to exporting 7; protected the hole, Lavalle indeformable; Mach number is remained unchanged, guaranteed the requirement of process for making, but the work-ing life of significant prolongation shower nozzle.Consider that constant current seam 5 also can be subjected to directly washing away and thermal radiation of high-temperature molten steel; preferred embodiment as the utility model refining oxygen lance blow head; as depicted in figs. 1 and 2; preferably on constant current seam 5, also inlay or be coated with heatproof protective layer 6; alleviate high-temperature molten steel to constant current seam 5 directly wash away and thermal radiation is corroded, more effectively stablize shower nozzle technical feature and raising shower nozzle work-ing life.
Claims (7)
1, a kind of refining oxygen lance blow head, comprise shower nozzle end face, outer welded tube, middle welded tube and interior welded tube, outer welded tube is a rising pipe, middle welded tube is a water inlet pipe, interior welded tube is an oxygen lance, it is characterized in that oxygen blast hole (8) is the hole, Lavalle, aditus laryngis (9) and outlet (7) area be than between 1.418～1.919, and inclination angle d ° in oxygen blast hole (8) is between 8 °～27 °.
2, refining oxygen lance blow head as claimed in claim 1, the inclination angle that it is characterized in that oxygen blast hole (8) Mach 2 ship 1 is between 8 °～27 °.
3, refining oxygen lance blow head as claimed in claim 1 or 2 is characterized in that oxygen blast hole (8) hole count is 2～8 holes.
4, refining oxygen lance blow head as claimed in claim 1 or 2 is characterized in that being provided with constant current seam (5) between the outlet (7) in the oxygen blast hole (8) on the shower nozzle end face (1) and shower nozzle end face (1).
5, refining oxygen lance blow head as claimed in claim 3 is characterized in that being provided with constant current seam (5) between the outlet (7) in the oxygen blast hole (8) on the shower nozzle end face (1) and shower nozzle end face (1).
6, refining oxygen lance blow head as claimed in claim 4 is characterized in that also inlaying or being coated with heatproof protective layer (6) on constant current seam (5).
7, refining oxygen lance blow head as claimed in claim 5 is characterized in that also inlaying or being coated with heatproof protective layer (6) on constant current seam (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420097466 CN2740619Y (en) | 2004-11-09 | 2004-11-09 | Nozzle of refined oxygen gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420097466 CN2740619Y (en) | 2004-11-09 | 2004-11-09 | Nozzle of refined oxygen gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2740619Y true CN2740619Y (en) | 2005-11-16 |
Family
ID=35350913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420097466 Expired - Fee Related CN2740619Y (en) | 2004-11-09 | 2004-11-09 | Nozzle of refined oxygen gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2740619Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371197A (en) * | 2018-12-24 | 2019-02-22 | 山东崇盛冶金氧枪有限公司 | A kind of change fire door purging device for steelmaking converter |
| CN110129515A (en) * | 2019-07-02 | 2019-08-16 | 马鞍山钢铁股份有限公司 | A kind of oxygen rifle system stagnation pressure measuring device and method |
-
2004
- 2004-11-09 CN CN 200420097466 patent/CN2740619Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109371197A (en) * | 2018-12-24 | 2019-02-22 | 山东崇盛冶金氧枪有限公司 | A kind of change fire door purging device for steelmaking converter |
| CN110129515A (en) * | 2019-07-02 | 2019-08-16 | 马鞍山钢铁股份有限公司 | A kind of oxygen rifle system stagnation pressure measuring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |