CN202910292U - Slab continuous casting immersion nozzle with long service life - Google Patents
Slab continuous casting immersion nozzle with long service life Download PDFInfo
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- CN202910292U CN202910292U CN 201220528369 CN201220528369U CN202910292U CN 202910292 U CN202910292 U CN 202910292U CN 201220528369 CN201220528369 CN 201220528369 CN 201220528369 U CN201220528369 U CN 201220528369U CN 202910292 U CN202910292 U CN 202910292U
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Abstract
The utility model relates to the technical field of steel continuous casting, in particular to an immersion nozzle device with long service life and used for a slab continuous casting crystallizer. The immersion nozzle device comprises a nozzle body with the upper end open and surrounded by a side wall and a base plate, the outer surface of the side wall is sleeved with a slag line, a vertical inner cavity is limited by the nozzle body, side holes are arranged in positions on the lower portion of the side wall, and the positions on the lower portion of the side wall are close to the base plate. The immersion nozzle device is characterized in that, the side wall is surrounded by a front broad wall, a rear broad wall, a left narrow wall and a right narrow wall, narrow slag lines on the narrow walls are thicker than broad slag lines on the broad walls, lower narrow walls below the narrow slag lines are thicker than upper narrow walls above the narrow slag lines, and the side holes are located on the lower narrow walls. The immersion nozzle device can prolong time of resisting covering slag eroding by a slab immersion nozzle, prolong service life of the slab immersion nozzle, and reduce use cost of the nozzle.
Description
Technical field
The utility model relates to the continuous casting technical field of steel, relates in particular to a kind of immersion type nozzle for slab continuous casting crystallizer device of long service life.
Background technology
Submersed nozzle is continuous casting steel machine technical field device commonly used, its Main Function is secondary oxidation, nitrogenize, the splash that prevents molten steel, flow pattern and the Temperature Distribution of avoid simultaneously the liquid level slag, regulating Mold, thereby impel the even zero defect growth of base shell in the crystallizer, and reduce gas and non-metallic inclusion in the molten steel as far as possible.Submersed nozzle for improve slab quality, improve working conditions, stabilizing continuous casting operation and prevent that from all there is significant effect the aspects such as casting billet surface and internal soundness defective, the conticaster in countries in the world is widely used.Under the prior art, continuous casting crystallizer for plate billet mainly adopts the cast of double-side-hole submersed nozzle, its agent structure is the pipeline that is sealed by the bottom that the refractory material compacting forms, comprise the inner chamber and symmetrical two side openings that link to each other with inner chamber of the vertical direction of upper shed, be provided with slag line above the submersed nozzle side opening.During cast-in-site submersed nozzle is inserted in the crystallizer, mouth of a river slag lining is positioned at the covering slag place of mold liquid level.Because composition has corrosion function to submersed nozzle in the covering slag; therefore, be in the continuous attenuate in slag line place of covering slag liquid level, wait to be thinned to a certain degree; the slag line place will fracture occur owing to insufficient strength, will have a strong impact on like this Solidification Quality of Mold.Generally speaking, the erosion condition at mouth of a river slag line place is just determining the service life of submersed nozzle.The thickness at existing submersed nozzle slag line place is the same with other position, is 15-30mm, and it is shorter that such slag line thickness can bear the time of covering slag erosion, so that the service life of submersed nozzle is generally not high.
Be in the utility model of ZL200620084440.0 in the patent No., a kind of magnesium zirconium mass immersion type sprue is disclosed, its main technical schemes is that whole piece slag line place is thickeied, make slag line place external diameter greater than the external diameter of mouth of a river body, can make like this slag line place support erosion-resistant time lengthening, but this scheme can not well be applicable to the slab submersed nozzle.Because distance is shorter between wide of the plate slab crystallizer; therefore adopt the flat mouth of a river more; guaranteeing has certain distance between wide and the mouth of a river sidewall; can prevent like this covering slag crust between wide of crystallizer and the mouth of a river wall; be commonly called as " bridging ", " bridging " affects the thawing of covering slag, causes base shell insufficient lubrication and produces surface quality defect; also can cause liquid level to tie cold steel, the bleed-out accident can occur when serious.And the mode of above-mentioned submersed nozzle slag line place thickening will shorten the distance of wide of crystallizer and submersed nozzle sidewall, increases the danger of " bridging ", so and is not suitable for using at the slab submersed nozzle.
Summary of the invention
The utility model mainly is for the existing above-mentioned technical problem of prior art; provide a kind of and can prolong the time that slab submersed nozzle opposing covering slag corrodes; prolong the service life of submersed nozzle, reduce the slab continuous casting submerged nozzle of the long service life of mouth of a river use cost.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of slab continuous casting submerged nozzle of long service life, the mouth of a river body that comprises the upper end open that is surrounded by sidewall and base plate, described sidewall outer surface is arranged with slag line, described body defines a vertical inner chamber, described lower sidewall offers side opening near the position of base plate, it is characterized in that: described sidewall is by front, latter two Kuan Bi and a left side, right two narrow walls surround, narrow slag line on the described narrow wall is thicker than the wide slag line on the described wide wall, the narrow wall in the top of narrow wall thickness more than described slag line, bottom that described slag line is following, described side opening is positioned on the narrow wall in bottom.The present invention is provided with the flat mouth of a river slag line and the thickening of following position thereof of the narrow wall of side opening; slag line thickening place is carried out in smoothing junction with the position that does not have thickening; the wide wall slag line in the mouth of a river and following position thereof do not thicken; both having guaranteed has certain distance between wide of crystallizer and the mouth of a river sidewall; prevent the covering slag crust between wide of crystallizer and the mouth of a river wall; prolong again the time that slab submersed nozzle opposing covering slag corrodes, prolonged the service life of submersed nozzle, reduced mouth of a river use cost.
As preferably, described body is to be that plane, narrow wall are the flat drum shape of arcwall face with the rectangular tubular of chamfering or wide wall.This structure manufacturing is simple, and stability in use is better.
As preferably, described side opening be ellipse, the rectangle with chamfering, circle or be up and down straight line, about be the combined shaped of camber line.This side opening structure manufacturing and usage comparison are convenient.
As preferably, described side opening is identical two of equal and opposite in direction, shape, and with respect to mouth of a river lumen centers line symmetry on narrow wall.This structure guarantees that the molten steel flow on the sustained height plane is more stable in the crystallizer so that molten steel flows at the outflow mouth of a river when crystallizer is.
As preferably, the upper and lower edge of described side opening is-25 °～15 ° inclination angle with horizontal direction.This structure can make side opening to the water conservancy diversion better effects if of molten steel.
As preferably, described body is made by the aluminum-carbon refractory material by hydrostatic pressing, and slag line adopts the zirconium dioxide fire resistant materials to make.This structure has further improved the service life at the mouth of a river.
There is following beneficial effect in the utility model with respect to prior art:
(1) slag line of the narrow wall in the mouth of a river has been thickeied, and can prolong the time that the submersed nozzle slag line is etched, and prevents submersed nozzle slag line place premature failure, prolongs the service life of submersed nozzle.
(2) slag line of the wide wall in the mouth of a river arranges routinely, can effectively avoid occurring " bridgings " between wide of wide of the mouth of a river and the crystallizer, avoids the thawing of liquid level covering slag bad or tie the cast problem such as cold steel.
(3) the following position of the narrow wall slag line in the mouth of a river has also thickeied, can add style big water gap side opening and base plate strength like this, what make that side opening and base plate can the long period bears washing away of molten steel, reduce the generation that the common cast accidents such as the end are worn at side opening breaking-up or the mouth of a river, further guaranteed the service life of submersed nozzle.
Description of drawings
Accompanying drawing 1 is the structural representation of the slab continuous casting submerged nozzle of a kind of long service life of the utility model.
Accompanying drawing 2 is A-A cutaway view among Fig. 1.
Accompanying drawing 3 is B-B cutaway view among Fig. 1.
The specific embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail, obviously, described embodiment only is part embodiment of the present utility model.
Embodiment 1:
Referring to accompanying drawing 1～3, the slab continuous casting submerged nozzle of a kind of long service life of the utility model, the mouth of a river body 1 that comprises the upper end open that is surrounded by sidewall 2 and base plate 3, described sidewall 2 outer surfaces are arranged with slag line 4, described body 1 defines a vertical inner chamber 5, described sidewall 2 bottoms offer side opening 6 near the position of base plate 3, described sidewall 2 is by front, latter two wide wall 22 and left side, right two narrow walls 21 surround, narrow slag line 41 on the described narrow wall 21 is thicker than the wide slag line 42 on the described wide wall 22, the narrow wall 211 in the bottom of described slag line below 4 is thicker than the narrow wall 212 in the top of described slag line more than 4, and described side opening 6 is positioned on the narrow wall 211 in bottom.
In actual applications, mouth of a river sidewall 2 and base plate 3 generally are to pass through hydrostatic pressing by aluminium carbonaceous or quartziferous refractory material, and slag line 4 adopts preferably zirconium oxide composite material of slag corrosion resistances.Described body 1 wide wall 22 is that plane, narrow wall 21 are the flat drum shape of arcwall face, certainly, also can be other flats such as rectangular tubular with chamfering.The narrow wall 21 in the described mouth of a river is being symmetrical arranged two longitudinally side openings 6 near base plate 3 places, the mouth of a river with respect to mouth of a river lumen centers line, the lower distance along dried up mouthful of base plate 3 upper surfaces of side opening 6 is 30mm, equal and opposite in direction, the shape of two side openings 6 are identical, described side opening 6 is the rectangle with chamfering, certainly, also can be to include but not limited to ellipse, circle or be up and down square other any suitable shapes such as combination shape for semicircle is middle.The upper and lower edge of described side opening is-15 ° inclination angle with horizontal direction.Because the slag line of the narrow wall 21 of submersed nozzle has been thickeied; can prolong like this time that the anti-covering slag of submersed nozzle corrodes; and the position (comprise side opening 6 and base plate 3) of slag line below 4 thickeied on the narrow wall 21; just can strengthen the intensity of side opening 6 and base plate 3; alleviate that side opening 6 that invar liquid intense impact causes damages or mouth of a river base plate 3 is worn the accident at the end, prolong the submersed nozzle purpose in service life thereby reach.
In a word, the slag line of the narrow wall in the utility model mouth of a river has been thickeied, and can prolong the time that the submersed nozzle slag line is etched, and prevents submersed nozzle slag line place premature failure, prolongs the service life of submersed nozzle.The slag line of the wide wall in the mouth of a river arranges routinely, can effectively avoid occurring " bridgings " between wide of wide of the mouth of a river and the crystallizer, avoids the thawing of liquid level covering slag bad or tie the cast problem such as cold steel.The following position of the narrow wall slag line in the mouth of a river has also thickeied, can add style big water gap side opening and base plate strength like this, what make that side opening and base plate can the long period bears washing away of molten steel, reduce the generation that the common cast accidents such as the end are worn at side opening breaking-up or the mouth of a river, further guaranteed the service life of submersed nozzle.
Should be understood that above-described embodiment only is used for explanation the utility model and is not used in the scope of the present utility model that limits.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (6)
1. the slab continuous casting submerged nozzle of a long service life, the mouth of a river body (1) that comprises the upper end open that is surrounded by sidewall (2) and base plate (3), described sidewall (2) outer surface is arranged with slag line (4), described body (1) defines a vertical inner chamber (5), described sidewall (2) bottom offers side opening (6) near the position of base plate (3), it is characterized in that: described sidewall (2) is by front, latter two wide wall (22) and a left side, right two narrow walls (21) surround, narrow slag line (41) on the described narrow wall (21) is thicker than the wide slag line (42) on the described wide wall (22), the following narrow wall in bottom (211) of described slag line (4) is thicker than the above narrow wall in top (212) of described slag line (4), and described side opening (6) is positioned on the narrow wall in bottom (211).
2. the slab continuous casting submerged nozzle of long service life according to claim 1 is characterized in that: described body (1) is the flat drum shape of arcwall face for rectangular tubular or the wide wall (22) with chamfering for plane, narrow wall (21).
3. the slab continuous casting submerged nozzle of long service life according to claim 1 is characterized in that: described side opening (6) for ellipse, the rectangle with chamfering, circle or be up and down straight line, about be the combined shaped of camber line.
4. the slab continuous casting submerged nozzle of long service life according to claim 3 is characterized in that: described side opening (6) is identical two of equal and opposite in direction, shape, and with respect to mouth of a river lumen centers line symmetry on narrow wall (21).
5. the slab continuous casting submerged nozzle of long service life according to claim 1, it is characterized in that: the upper and lower edge of described side opening (6) is-25 °～15 ° inclination angle with horizontal direction.
6. the slab continuous casting submerged nozzle of long service life according to claim 1, it is characterized in that: described body (1) is made by the aluminum-carbon refractory material by hydrostatic pressing, and slag line (4) adopts the zirconium dioxide fire resistant materials to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528369 CN202910292U (en) | 2012-10-16 | 2012-10-16 | Slab continuous casting immersion nozzle with long service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220528369 CN202910292U (en) | 2012-10-16 | 2012-10-16 | Slab continuous casting immersion nozzle with long service life |
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| Publication Number | Publication Date |
|---|---|
| CN202910292U true CN202910292U (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220528369 Expired - Fee Related CN202910292U (en) | 2012-10-16 | 2012-10-16 | Slab continuous casting immersion nozzle with long service life |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341622A (en) * | 2013-06-26 | 2013-10-09 | 攀钢集团攀枝花钢钒有限公司 | Method for prolonging service life of continuous casting immersion type water opening |
-
2012
- 2012-10-16 CN CN 201220528369 patent/CN202910292U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103341622A (en) * | 2013-06-26 | 2013-10-09 | 攀钢集团攀枝花钢钒有限公司 | Method for prolonging service life of continuous casting immersion type water opening |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20151016 |
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| EXPY | Termination of patent right or utility model |