CN202527703U - Immersion nozzle for continuous casting crystallizer - Google Patents
Immersion nozzle for continuous casting crystallizer Download PDFInfo
- Publication number
- CN202527703U CN202527703U CN2012200261188U CN201220026118U CN202527703U CN 202527703 U CN202527703 U CN 202527703U CN 2012200261188 U CN2012200261188 U CN 2012200261188U CN 201220026118 U CN201220026118 U CN 201220026118U CN 202527703 U CN202527703 U CN 202527703U
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- CN
- China
- Prior art keywords
- sidewall
- submersed nozzle
- side opening
- spacer block
- crystallizer
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Abstract
The utility model relates to an immersion nozzle for a continuous casting crystallizer. The immersion nozzle comprises side walls and a bottom, wherein two side holes are respectively formed in each of two symmetrical side walls at the narrow part of the crystallizer, the side holes in the opposite side walls are the same in size and shape and are in axial symmetry along the central axial line of the nozzle, and the two side holes in the same side wall are the same in size and shape, are separated by a vertical spacer block which is connected with the side wall and the bottom and are in axial symmetry along the center lines of the upper and the lower edges of the spacer block; and in the vertical direction, the two side surfaces, which are close to the corresponding middle spacer block, of the two side holes in the same side wall, namely the inner side wall surfaces of the two side holes, are straight surfaces parallel to the center line of an inner cavity, and the other two separated side surfaces of the two side holes, namely the outer side wall surfaces of the two side holes, are inclined planes flared from inside to outside. The spacer blocks can prevent high-temperature molten steel from flowing to a high-temperature area in the middles of the wall surfaces, and the flare angles of the outer side wall surfaces of the side holes can lead the molten steel to corner areas with lower temperature, so that uniform temperature and ingredients of the molten steel in the transverse direction are ensured.
Description
Technical field
The utility model relates to the continuous cast crystallizer of steel, relates in particular to the submersed nozzle device that slab and bloom (referring to the square billet of cross dimensions greater than 200mm * 200mm) continuous cast mold is used.
Background technology
Under the prior art; Continuous casting crystallizer for plate billet mainly adopts the submersed nozzle cast of bilateral hole, and bloom (referring to the square billet of casting blank cross-section size greater than 200mm * 200mm) continuous cast mold requires difference can adopt the through-type mouth of a river, the mouth of a river, bilateral hole and the four side opening mouths of a river to pour into a mould according to cast.The bilateral hole submersed nozzle agent structure that present slab and bloom crystallizer are adopted is basic identical; All are the pipelines that seal by the bottom that the refractory material compacting forms; The inner chamber and symmetrical two side openings that link to each other with inner chamber that comprise the vertical direction of upper shed, two side holes is aimed at leptoprosopy center, crystallizer both sides during cast, and the molten steel in the tundish flows into from the inner chamber upper shed of submersed nozzle; Decrystallize in the device from flowing out near two on the sidewall of bottom surface symmetrical side openings, going forward side by side.The side opening of existing bilateral hole submersed nozzle can be square for chamfering, circular or oval, lower wall surface is parallel on the side opening, and is certain angle of inclination with horizontal direction, about two walls are flat faces, parallel with the central axis of side opening.When adopting the submersed nozzle cast of existing bilateral hole; Usually can there be following two drawbacks: the first, because aiming at crystallizer wall center, pours into a mould the submersed nozzle side opening, the higher stream thigh of flow velocity that comes out from side opening always impacts the base shell at crystallizer wall face center earlier; The base shell refuse that causes the center to solidify; Thereby make that the base shell is thinner, and on the other hand, a little less than the cooling relatively of crystallizer wall center; This just makes that near the shell thickness the strand center is thinner, mass defects such as surface or subcutaneous lobe under the effect of solidification shrinkage thermal stress, usually occur; The second, the stream thigh of side opening limit portion receives the restriction of side opening both sides wall, is difficult to flow and diffusion to the crystallizer folding corner region; And because side opening wall convection current thigh produces reaction force, so the stream plume speed near wall place is relatively low; Therefore; The high-temperature molten steel of mouth of a river side opening outlet is difficult to be delivered to the folding corner region of crystallizer in the short time, make that the velocity field of the interior cross section of crystallizer and temperature field are also inhomogeneous, says from external refrigeration again; The bight of crystallizer belongs to the two dimension cooling; Intensity of cooling is very big, therefore the crystallizer folding corner region usually since cross cold the cold steel of knot appears, covering slag crusts and problems such as generation corner crack, has had a strong impact on continuous casting process direct motion and continuous casting billet quality.
At publication number is in the Chinese utility model patent of CN1761543; A kind of submersed nozzle with dynamic stability is disclosed; The centre, upper end or the centre, lower end that it is characterized in that mouth of a river water outlet side opening have one " tongue ", thereby in " tongue " both sides at least two grooves are provided.This kind submersed nozzle can improve the MOLTEN STEEL FLOW state; Also can suitably reduce the impact of molten steel for crystallizer middle part solidified shell; But; Be difficult to reduce significantly stream burst destruction, can not alleviate a series of problems such as knot cold steel, covering slag caking and corner crack of crystallizer bight because of crossing cold generation to thin solidified shell in the middle of the crystallizer.
The utility model content
The technical problem that the utility model will solve is; To the above-mentioned deficiency of prior art and provide a kind of continuous cast mold to use submersed nozzle; Can optimize slab and billet continuous casting crystallizer flow field and temperature field, increase the temperature and the homogeneity of ingredients in cross section, alleviate burst the impact of outlet stream crystallizer centre solidified shell; Reduce problems such as strand corner crack and mold liquid level crust, promote the evenly growth rationally of base shell.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of continuous cast mold is used submersed nozzle, comprises the sidewall of formation mouth of a river body and the bottom of sealing, and sidewall links to each other with the bottom and surrounds vertical and open-topped inner chamber or centre bore, has side opening on the sidewall near the bottom, side opening and intracavity inter-connection; It is characterized in that: be positioned on the two symmetrical sidewalls of crystallizer leptoprosopy and respectively have two side openings; The side opening size shape that is positioned on the opposing sidewalls is identical; And central axis axisymmetricly along the mouth of a river; Be positioned at two side opening size shape of sidewall identical, middle separating with vertical spacer block that sidewall links to each other with the bottom, and axisymmetricly along the center line of bottom on the spacer block; Two sides that the vertical direction two side holes is close with middle spacer block also are that interior sidewall surface is the flat face with the lumen centers line parallel, and two sides in addition of leaving mutually also are that outer side surface is the inclined-plane from the inside to the outside and extends out.
As the preferred structure of the utility model, said four side openings are shaped as the rectangle of band chamfering or are with the trapezoidal or trapezoidal of chamfering.
The height of said four side openings equates, and is in sustained height on the sidewall.
Said spacer block is rectangle, isosceles trapezoid or the isosceles trapezoid of falling.
Lower wall surface and horizontal direction are-25 °～15 ° inclination angle on the said side opening.
The outer side surface that is positioned at two phase proximal aperture on the opposing sidewalls forms at interval through the sidewall that is positioned at wide of crystallizer.
Said submersed nozzle body is for being that plane, leptoprosopy sidewall are the flat ring body of cambered surface by the circular ring body of refractory material through hydrostatic pressing, rectangular cylinder or wide sidewall of band chamfering; Accordingly, said submersed nozzle inner chamber cross section is the flat of cambered surface for the rectangle of circular, band chamfering or wide for plane, leptoprosopy.
Said submersed nozzle bottom is sunken bottom, flat or concave bottom.
During cast, the opening on molten steel inner chamber top from the mouth of a river flows into, and from the side opening of top, bottom, flows out.
There is following beneficial effect in the utility model with respect to prior art:
(1) owing to the inhibition of spacer block between the submersed nozzle single face two side holes, alleviated of the impact of high-temperature stream thigh to the more weak solidified shell of crystallizer center cooling, improved the uniformity of transverse temperature and composition, promoted the evenly growth rationally of base shell.
(2) molten steel that flows out from side opening can move to the crystallizer folding corner region under side opening extends out the guide functions at inclination angle; Make the high-temperature molten steel cross direction profiles more even; Simultaneously with the high-temperature molten steel drainage to the bight; Corner two dimension cooled region has temperature-compensating, can effectively alleviate knot cold steel, covering slag caking and the corner crack problem of bight because of crossing cold generation, helps continuous casting process direct motion and slab quality and improves.
Description of drawings:
Fig. 1 is the structural representation of submersed nozzle among embodiment of the utility model;
Fig. 2 be between submersed nozzle homonymy two holes of the utility model spacer block for falling the embodiment sketch map of isosceles trapezoid.
Fig. 3 is that spacer block is the embodiment sketch map of isosceles trapezoid between submersed nozzle homonymy two holes of the utility model.
Fig. 4 is that inner chamber cross section in the mouth of a river is that the A-A of embodiment of flat is to cutaway view among Fig. 1;
Fig. 5 be among Fig. 1 mouth of a river inner chamber cross section for the A-A of circular embodiment to cutaway view;
Fig. 6 is that the submersed nozzle of flat inner chamber is arranged in the cross sectional representation in the plate slab crystallizer.
Fig. 7 is that the submersed nozzle of round cavity is arranged in the cross sectional representation in the bloom crystallizer.
Label is following in the accompanying drawing, 1-sidewall, 2-bottom, 3-inner chamber, 4-first side opening, 5-second side opening, 6-spacer block 7-plate slab crystallizer, 8-bloom crystallizer
The specific embodiment:
Below in conjunction with embodiment and accompanying drawing the utility model is described further, but does not limit the utility model.
Like Fig. 1～shown in Figure 5, a kind of continuous cast mold is used submersed nozzle, comprises mouth of a river sidewall 1, and the lower end of said mouth of a river sidewall 1 is the bottom 2 of sealing, and bottom 2 can be convex, flat shape or spill (being spill shown in Fig. 1-3).The central passage that mouth of a river sidewall 1 surrounds is the inner chamber 3 of upper shed, and the shape of said inner chamber 3 can be square for circle, flat or chamfering.Be positioned on two faces of mouth of a river sidewall 1 symmetry of 2 tops, bottom and have two side openings, the side opening size shape that is in the plane of symmetry is identical, and central axis is axisymmetricly along the mouth of a river.Two side openings on mouth of a river sidewall 1 single face are respectively first side opening 4 and second side opening 5, separate with vertical spacer block 6 between the two, and vertical spacer block 6 can be rectangle, isosceles trapezoid or the isosceles trapezoid of falling.First side opening 4 and second side opening, 5 shape sizes are identical, and along center line following on the spacer block 6 axisymmetricly.Said first side opening 4 and second side opening 5 can be for the chamfering rectangles, chamfering is trapezoidal or inverted chamfering is trapezoidal, and chamfer radius is 3mm～30mm.The last lower wall surface and the horizontal direction of said first side opening 4 and second side opening 5 are-25 °～15 ° inclination angle, and the lower edge wall is 0～40mm from the distance of the upper surface of bottom 2.Said first side opening 4 is the flat face parallel with the side opening central axis with second side opening 5 with spacer block 6 close two side walls (also being interior sidewall surface); The two side walls (also being outer side surface) in addition that leaves mutually is 5 °～60 ° inclination angle from inside to outside, has the inclined-plane that expands outwardly.Among Fig. 4, the submersed nozzle body is that wide sidewall is that plane, leptoprosopy sidewall are the flat ring body of cambered surface; Accordingly, to be wide be the flat of cambered surface for plane, leptoprosopy to submersed nozzle inner chamber cross section; The outer side surface that is positioned at two phase proximal aperture on the opposing sidewalls forms at interval through wide sidewall.Among Fig. 5, the submersed nozzle body is circular ring body; Accordingly, submersed nozzle inner chamber cross section is circular; The outer side surface that is positioned at two phase proximal aperture on the opposing sidewalls passes through wide sidewall formation, and two walls intersect at interval and at the interval.
The sidewall 1 of said submersed nozzle and coupled bottom 2 all adopt refractory material to pass through hydrostatic pressing, and it is very good that its effect of field application has been proved to be.During actual the cast; Molten steel is from the inflow suitable for reading of submersed nozzle inner chamber 3; By flowing out in first side opening 4 of both sides, the mouth of a river and second side opening 5, spacer block 6 has hindered the high-temperature region of high-temperature molten steel in the middle of wall and has flowed the crystallizer folding corner region that the angle of flare of side opening outer side surface is lower with molten steel drainage to temperature; So just guarantee the uniformity of horizontal molten steel temperature of crystallizer and composition, promoted the even growth of nascent solidified shell.
Cast can adopt bilateral as shown in Figure 6 four perforating submersed nozzles to pour into a mould during slab, the cross section of said immersion water sidewall 1 and inner chamber 3 all be before and after for the plane, about be the flat of cambered surface.Spill is arranged in the bottom 2 of said submersed nozzle, and the last lower wall surface inclination angle of first side opening 4 and second side opening 5 is-15 °, and the angle of inclination of outer side surface is 20 °, and it is square that side opening is chamfering, and chamfer radius is 10mm.Spacer block 6 width between the said two side holes are 15mm.During cast; The leptoprosopy center of spacer block 6 alignment sheets billet crystallizers 7; Molten steel flows out from first side opening 4 and second side opening 5 from the entering suitable for reading of inner chamber 3, can alleviate the impact of high-temperature molten steel to leptoprosopy center base shell like this; And the temperature of increase plate slab crystallizer 7 folding corner regions, help forming even, flawless solidified shell.
During the cast bloom, can adopt bilateral as shown in Figure 7 four perforating submersed nozzles to pour into a mould, the cross section of said immersion water sidewall 1 and inner chamber 3 is circular.Spill is arranged in the bottom 2 of said submersed nozzle, and the last lower wall surface inclination angle of first side opening 4 and second side opening 5 is-10 °, and the angle of inclination of outer side surface is 30 °, and it is square that side opening is chamfering, and chamfer radius is 10mm.Spacer block 6 width between the said two side holes are 15mm.During cast; Spacer block 6 is aimed at the leptoprosopy center of bloom crystallizer 8, and molten steel flows out from first side opening 4 and second side opening 5 from the entering suitable for reading of inner chamber 3; Can alleviate high-temperature molten steel like this to of the impact of leptoprosopy center than the thin stock shell; And the bight low-temperature region of bloom crystallizer 8 had temperature-compensating, and promote the uniformity of strand transverse temperature and composition, help the normal of base shell and rationally grow.
The above disclosed preferred embodiment that is merely the utility model can not limit the interest field of the utility model certainly with this, so according to the equivalence variation that the utility model claim is done, still belong to the protection domain of the utility model.
Claims (8)
1. a continuous cast mold is used submersed nozzle, comprises the sidewall of formation mouth of a river body and the bottom of sealing, and sidewall links to each other with the bottom and surrounds vertical and open-topped inner chamber or centre bore, has side opening on the sidewall near the bottom, side opening and intracavity inter-connection; It is characterized in that: be positioned on the two symmetrical sidewalls of crystallizer leptoprosopy and respectively have two side openings; The side opening size shape that is positioned on the opposing sidewalls is identical; And central axis axisymmetricly along the mouth of a river; Be positioned at two side opening size shape of sidewall identical, middle separating with vertical spacer block that sidewall links to each other with the bottom, and axisymmetricly along the center line of bottom on the spacer block; Two sides that the vertical direction two side holes is close with middle spacer block also are that interior sidewall surface is the flat face with the lumen centers line parallel, and two sides in addition of leaving mutually also are that outer side surface is the inclined-plane from the inside to the outside and extends out.
2. submersed nozzle according to claim 1 is characterized in that said four side openings are shaped as the rectangle of band chamfering or are with the trapezoidal or trapezoidal of chamfering.
3. submersed nozzle according to claim 1 and 2 is characterized in that the height of said four side openings equates, and is in sustained height on the sidewall.
4. submersed nozzle according to claim 3 is characterized in that said spacer block is rectangle, isosceles trapezoid or the isosceles trapezoid of falling.
5. submersed nozzle according to claim 3 is characterized in that: lower wall surface and horizontal direction are-25 °～15 ° inclination angle on the said side opening.
6. according to claim 1 or 2 or 4 or 5 described submersed nozzles, it is characterized in that: the outer side surface that is positioned at two phase proximal aperture on the opposing sidewalls forms at interval through the sidewall that is positioned at wide of crystallizer.
7. submersed nozzle according to claim 6 is characterized in that said submersed nozzle body is for being that plane, leptoprosopy sidewall are the flat ring body of cambered surface by the circular ring body of refractory material through hydrostatic pressing, rectangular cylinder or wide sidewall of band chamfering; Accordingly, said submersed nozzle inner chamber cross section is the flat of cambered surface for the rectangle of circular, band chamfering or wide for plane, leptoprosopy.
8. according to claim 1 or 2 or 4 or 5 or 7 described submersed nozzles, it is characterized in that said submersed nozzle bottom is sunken bottom, flat or concave bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200261188U CN202527703U (en) | 2012-01-19 | 2012-01-19 | Immersion nozzle for continuous casting crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200261188U CN202527703U (en) | 2012-01-19 | 2012-01-19 | Immersion nozzle for continuous casting crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202527703U true CN202527703U (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200261188U Expired - Lifetime CN202527703U (en) | 2012-01-19 | 2012-01-19 | Immersion nozzle for continuous casting crystallizer |
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| Country | Link |
|---|---|
| CN (1) | CN202527703U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554209A (en) * | 2012-01-19 | 2012-07-11 | 中冶南方工程技术有限公司 | Submersed nozzle for continuous casting moulds |
-
2012
- 2012-01-19 CN CN2012200261188U patent/CN202527703U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554209A (en) * | 2012-01-19 | 2012-07-11 | 中冶南方工程技术有限公司 | Submersed nozzle for continuous casting moulds |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121114 Effective date of abandoning: 20131030 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20121114 Effective date of abandoning: 20131030 |
|
| RGAV | Abandon patent right to avoid regrant |