CN211464815U - Immersion type side water spraying opening for continuous casting - Google Patents
Immersion type side water spraying opening for continuous casting Download PDFInfo
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- CN211464815U CN211464815U CN201921926621.7U CN201921926621U CN211464815U CN 211464815 U CN211464815 U CN 211464815U CN 201921926621 U CN201921926621 U CN 201921926621U CN 211464815 U CN211464815 U CN 211464815U
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- side hole
- inclination angle
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Abstract
A submerged side nozzle for continuous casting is arranged in a crystallizer and comprises main side holes which are symmetrically arranged, the cross section of each main side hole is rectangular or square, the upper surface of each main side hole is provided with an upper inclination angle a1, the lower surface of each main side hole is provided with a lower inclination angle a2, the degree of the upper inclination angle is smaller than that of the lower inclination angle, and the difference between the upper inclination angle and the lower inclination angle is 3-5 degrees; and an auxiliary side hole is arranged at the upper part of the main side hole, and the flow area of the auxiliary side hole is 1/40-1/10 of the flow area of the main side hole. The utility model has the advantages as follows: 1. the auxiliary side hole is arranged, and part of molten steel flows out of the auxiliary side hole, so that the heat output of the upper part is improved, the upper reflux heat transfer of the molten steel is improved, and a good foundation is provided for increasing the insertion depth of the submerged nozzle; 2. the upper inclination angle and the lower inclination angle of the main side hole adopt different angles, and the upper inclination angle is smaller than the lower inclination angle, so that the upward backflow of molten steel flow is strengthened, the heat transfer of the upward backflow molten steel is further improved, and a thermal flow field is optimized.
Description
Technical Field
The utility model relates to a device for optimizing crystallizer molten steel flow field in the pouring process of a continuous casting machine, in particular to an immersion side water nozzle for continuous casting.
Background
In continuous casting production, the immersion type water gap insertion depth is an important production control parameter for ensuring the quality of a casting blank in the continuous casting and continuous casting process. In the slab continuous casting production process, because the liquid level of the tundish has a certain height, when molten steel enters the crystallizer from the main side hole of the submerged nozzle, molten steel flow has a certain speed and angle, and upper reflux and lower reflux are formed after the molten steel impacts the narrow surface of the crystallizer. The lower reflux forms a certain impact depth, if the impact depth is too deep, a high-temperature area in the crystallizer moves downwards, the melting of the protective slag is weakened and influenced, and simultaneously, the solidified blank shell is thinned and even secondary melting is possibly caused, the leakage probability is increased, and impurities are not easy to float. And if the impact depth is too small, the liquid level fluctuation is severe, the slag rolling phenomenon is generated, the number of inclusions is increased, the quality of the continuous casting billet is seriously influenced, the continuous casting drawing speed cannot be effectively improved, and the yield is influenced. Therefore, the insertion depth has contradiction. In the prior production, reasonable control of the impact depth is particularly important for improving the internal flow field of the crystallizer, but the problems of the two aspects cannot be solved at the same time.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's drawback, provide a can improve immersion side nozzle for continuous casting in crystallizer flow field.
The problem of the utility model is realized with following technical scheme:
a submerged side nozzle for continuous casting is arranged in a crystallizer and comprises main side holes which are symmetrically arranged, the cross section of each main side hole is rectangular or square, the upper surfaces of the main side holes are provided with an upper inclination angle a1, the lower surfaces of the main side holes are provided with a lower inclination angle a2, and the degree of the upper inclination angle is smaller than that of the lower inclination angle;
and an auxiliary side hole is arranged at the upper part of the main side hole, and the flow area of the auxiliary side hole is 1/40-1/10 of the flow area of the main side hole.
The degree of the upper inclination angle of the immersion type side nozzle for continuous casting is not less than 10 degrees, and the degree of the lower inclination angle of the immersion type side nozzle for continuous casting is not more than 20 degrees.
In the submerged side nozzle for continuous casting, the axis of the secondary side hole is vertical or inclined upwards relative to the axis of the side nozzle, and the inclination angle a3 is not more than 10 degrees.
In the submerged side nozzle for continuous casting, the auxiliary side hole is cylindrical or conical, and the conical angle of the conical auxiliary side hole is 5-8 degrees.
The distance from the axis of the auxiliary side hole to the axis of the main side hole of the submerged side nozzle for continuous casting is 20-50 mm.
The utility model discloses to solve and optimize crystallizer molten steel flow field problem and improve immersion side nozzle structure, its beneficial effect as follows: 1. the auxiliary side hole is arranged, and part of molten steel flows out of the auxiliary side hole, so that the heat output of the upper part is improved, the upper reflux heat transfer of the molten steel is improved, and a good foundation is provided for increasing the insertion depth of the submerged nozzle; 2. the upper inclination angle and the lower inclination angle of the main side hole adopt different angles, and the upper inclination angle is smaller than the lower inclination angle, so that the upward backflow of molten steel flow is strengthened, the heat transfer of the upward backflow molten steel is further improved, and a thermal flow field is optimized. The utility model discloses a design has optimized upper portion flow field heat distribution, consequently can further increase the depth of insertion, promotes the high speed of drawing, increases continuous casting billet output.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a first embodiment of the present invention;
FIG. 2 is a schematic structural view of a second embodiment of the present invention;
fig. 3 is a schematic structural view of a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fourth embodiment of the present invention.
The reference numbers in the figures denote: 1. a submerged side nozzle 2, an auxiliary side hole 3 and a main side hole.
Detailed Description
Referring to fig. 1, the immersion side nozzle for continuous casting of the present invention is disposed in the crystallizer, and includes a main side hole 3 symmetrically disposed, and the cross-sectional shape of the main side hole is square or rectangular. The utility model discloses an important improvement is that the upper surface of main side opening has upper inclination a1, and the lower surface has declination an 2, and the upper inclination is less than the declination. Wherein the degree of the upper inclination angle is not less than 10 degrees, and the degree of the lower inclination angle is not more than 20 degrees. The main side holes are provided with different upper inclination angles and lower inclination angles, and the upper inclination angles are smaller than the lower inclination angles, so that when molten steel flows out of the two main side holes, the molten steel is promoted to be filled into the crystallizer in a fan-shaped expansion mode to form larger upper reflux because the upper inclination angles are smaller than the lower inclination angles, the heat transfer of the upper reflux molten steel is improved, and a heat flow field is optimized. The design of a non-parallel inclination angle structure slows down the strong impact of the molten steel stream on the side surface of the crystallizer.
Still referring to fig. 1, another important improvement of the present invention is to provide secondary side holes 2 respectively at the upper portions of the two primary side holes, the flow area of the secondary side holes being 1/40-1/10 of the flow area of the primary side holes. The auxiliary side hole is arranged, so that a small part of molten steel can flow out of the auxiliary side hole, the heat output of the upper part is improved, the upward backflow heat transfer of the molten steel is improved, and a good foundation is provided for increasing the insertion depth of the submerged nozzle. The size of the auxiliary side hole is far smaller than that of the main side hole, and the heat supply strength of the upper part of the crystallizer is further enhanced.
Fig. 1 shows a first embodiment of the present invention, in which the axis of the secondary side hole is perpendicular to the axis of the side nozzle.
Fig. 2 shows a second embodiment of the invention, in which the secondary port axis is inclined upwardly with respect to the axis of the side nozzle, at an angle a3 of not more than 10 °. The secondary side hole is designed according to the second embodiment, so that the molten steel trickle upward spraying effect is better, and the heat supplement is quicker and more sufficient.
Fig. 3 shows a third embodiment of the present invention, in which the secondary side hole adopts a tapered hole from outside to inside diameter, and the secondary side hole adopts a tapered hole to make molten steel thin flow spray out as a diffusion flow, so that the area for strengthening upper heat supply is larger.
Fig. 4 shows a fourth embodiment of the present invention, in which the secondary side hole is a conical hole, and the axis of the secondary side hole is inclined upward relative to the axis of the side nozzle. The fourth embodiment combines the advantages of the second and third embodiments, and has the best effect.
One specific example is provided below: the main side hole of the submerged side nozzle is of a rectangular section, the upper inclination angle a1 of the main side hole is 14 degrees, and the lower inclination angle a2 of the submerged side nozzle is 18 degrees. Be equipped with vice side opening on the upper portion of main side hole, the distance of vice side opening axis to main side hole axis is 30 millimeters, and vice side opening is cylindrical hole, and the through flow area of vice side opening is 1/20 of main side opening, and the axis of vice side opening inclines for the axis of immersion side nozzle, and inclination is 7.
Claims (5)
1. The utility model provides a continuous casting is with immersion side nozzle, sets up in the crystallizer, including the main side opening that the symmetry set up, its characterized in that: the section of the main side hole is rectangular, the upper surface of the main side hole is provided with an upper inclination angle a1, the lower surface of the main side hole is provided with a lower inclination angle a2, and the degree of the upper inclination angle is smaller than that of the lower inclination angle;
and an auxiliary side hole is arranged at the upper part of the main side hole, and the flow area of the auxiliary side hole is 1/40-1/10 of the flow area of the main side hole.
2. The submerged entry side nozzle of claim 1, wherein: the degree of the upper inclination angle is not less than 10 degrees, and the degree of the lower inclination angle is not more than 20 degrees.
3. The submerged side nozzle for continuous casting according to claim 2, characterized in that: the axis of the auxiliary side hole is vertical or inclined upwards relative to the axis of the side water injection port, and the inclination angle a3 is not more than 10 degrees.
4. The submerged entry side nozzle for continuous casting of claim 3, characterized in that: the secondary side hole is cylindrical or conical, and the conical angle of the conical secondary side hole is 5-8 degrees.
5. The submerged entry side nozzle for continuous casting of claim 4, characterized in that: the distance from the axis of the auxiliary side hole to the axis of the main side hole is 20-50 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921926621.7U CN211464815U (en) | 2019-11-08 | 2019-11-08 | Immersion type side water spraying opening for continuous casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921926621.7U CN211464815U (en) | 2019-11-08 | 2019-11-08 | Immersion type side water spraying opening for continuous casting |
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| Publication Number | Publication Date |
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| CN211464815U true CN211464815U (en) | 2020-09-11 |
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| CN201921926621.7U Active CN211464815U (en) | 2019-11-08 | 2019-11-08 | Immersion type side water spraying opening for continuous casting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773731A (en) * | 2019-11-08 | 2020-02-11 | 德龙钢铁有限公司 | Improve immersion side nozzle for continuous casting in crystallizer flow field |
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2019
- 2019-11-08 CN CN201921926621.7U patent/CN211464815U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773731A (en) * | 2019-11-08 | 2020-02-11 | 德龙钢铁有限公司 | Improve immersion side nozzle for continuous casting in crystallizer flow field |
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