CN216540828U - Tundish nozzle steel retaining groove, tundish nozzle and tundish - Google Patents
Tundish nozzle steel retaining groove, tundish nozzle and tundish Download PDFInfo
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- CN216540828U CN216540828U CN202122527784.1U CN202122527784U CN216540828U CN 216540828 U CN216540828 U CN 216540828U CN 202122527784 U CN202122527784 U CN 202122527784U CN 216540828 U CN216540828 U CN 216540828U
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- tundish
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The utility model provides a tundish nozzle steel retaining groove, a tundish nozzle and a tundish, wherein the tundish nozzle steel retaining groove comprises: the steel retaining groove body is of an inverted groove-shaped structure with an arc-shaped cross section, two ends of the steel retaining groove body are closed, and the bottom edge of the steel retaining groove body is suitable for being connected with a tundish bottom working lining; the arc side wall of the steel retaining groove main body is provided with a flow guide hole, and the steel retaining groove main body is made of refractory materials; and the blocking steel plate is arranged in the flow guide hole. The tundish nozzle steel retaining groove is provided with a flow guide hole, and a blocking steel plate is arranged in the flow guide hole, so that molten steel can be temporarily blocked from entering a water inlet, and cold steel of the molten steel at the nozzle is avoided; large-sized impurities can be prevented from entering and blocking a water gap; the molten steel flow field around the water gap is changed, and vortex flow around the water gap is prevented; molten steel flow in a short circuit process is avoided, and impurities in the molten steel are conveniently adsorbed by the covering agent.
Description
Technical Field
The utility model belongs to the technical field of steelmaking equipment, and particularly relates to a tundish nozzle steel retaining groove, a tundish nozzle and a tundish.
Background
The tundish is an intermediate appliance for connecting a steel ladle and a crystallizer in the steelmaking production process, and has the functions of shunting, continuous casting, pressure reduction, protection and refining.
The pouring basket firstly receives the molten steel poured from the ladle, and then the molten steel is distributed to each crystallizer through a pouring basket water gap at the bottom, at present, the pouring basket still has the following problems in the steel pouring process of a continuous casting machine: 1. molten steel of a steel ladle flows into a tundish through a long nozzle and flows into each tundish nozzle after being divided, and molten steel often forms steel at the tundish nozzle due to low online baking temperature of the tundish or low molten steel temperature in the steel ladle, so that casting failure is caused; 2. the water gap of the tundish is blocked because large-size impurities in the tundish are collected at the water gap of the tundish; 3. molten steel forms vortex at the water outlet of the tundish, so that the erosion of the molten steel to the water outlet is accelerated, and the tundish is taken off line in advance; 4. for a multi-flow tundish, the distance from molten steel to each water gap is different, and for short-circuit molten steel flow in the multi-flow tundish, the flow path of the short-circuit molten steel flow is prolonged as far as possible, so that inclusions in the molten steel have enough time to float to the molten steel surface and be adsorbed by a covering agent. The patent with publication number CN203371034U discloses a tundish nozzle slag stopping device, which is arranged into a cylindrical structure capable of being buckled on the outer ring of a nozzle bowl part and is formed by pouring magnesium oxide materials, and the device can prevent residual steel slag on a tundish cover in the baking process from being heated and falling into a water inlet, and simultaneously avoids the problem of slag entrapment at the nozzle in the initial casting stage, but still can not solve the problem.
Therefore, in order to improve the service life of the tundish and the quality of the cast slab, a device capable of prolonging the flow path of molten steel, preventing the nozzle from generating eddy current and preventing the nozzle from being blocked by the chilled steel and impurities is needed.
SUMMERY OF THE UTILITY MODEL
The utility model solves the technical problem of providing a tundish nozzle steel retaining groove, a tundish nozzle and a tundish, wherein the tundish nozzle steel retaining groove is provided with a flow guide hole, and a blocking steel plate is arranged in the flow guide hole, so that molten steel can be temporarily blocked from entering a water inlet, and the molten steel is prevented from being cold-rolled at the nozzle; large-size impurities can be prevented from entering and blocking the water gap; the molten steel flow field around the water gap is changed, and vortex flow around the water gap is prevented; molten steel flow in a short circuit process is avoided, and impurities in the molten steel are conveniently adsorbed by the covering agent.
In order to solve the above problems, an aspect of the present invention provides a tundish nozzle steel retaining groove, comprising:
the steel retaining groove comprises a steel retaining groove body, wherein the steel retaining groove body is of an inverted groove-shaped structure with an arc-shaped cross section, two ends of the steel retaining groove body are closed, and the bottom edge of the steel retaining groove body is suitable for being connected with a tundish bottom working lining; the arc side wall of the steel retaining groove main body is provided with a flow guide hole, and the steel retaining groove main body is made of refractory materials;
and the blocking steel plate is arranged in the diversion hole.
In the present invention, the cross section means a section perpendicular to the longitudinal direction or axial direction of the groove-like structure.
The tundish nozzle steel blocking groove is arranged on a tundish nozzle, and at the initial casting stage of a tundish without using a stopper rod, molten steel with low temperature enters the tundish which is not baked in place, so that the temperature of the molten steel is reduced quickly, and the molten steel is condensed to cause blockage after being lower than the liquidus temperature of the molten steel. Meanwhile, the tundish nozzle steel retaining groove is arranged on the tundish nozzle, the molten steel flow field around the nozzle can be changed, the vortex around the nozzle is prevented, and the nozzle is prevented from being eroded too fast. For a multi-flow tundish with different routes from molten steel to each nozzle, the nozzle steel retaining groove of the tundish can also avoid short-circuit distance molten steel flow and prolong the flow path of the molten steel as much as possible, so that inclusions in the molten steel have enough time to float to the surface of the molten steel and are adsorbed by the covering agent.
Preferably, the bottom edge of the steel retaining groove main body is further provided with an anti-floating outer edge, and the anti-floating outer edge is suitable for being attached and connected with the tundish bottom working lining.
The tundish nozzle steel retaining groove is provided with the anti-floating outer edge, and is fixed on the tundish bottom working lining through being matched with the fixed refractory material on the tundish bottom working lining, so that the defects of easy floating and instability of the tundish nozzle steel retaining groove can be overcome, the tundish nozzle steel retaining groove plays a role in the initial casting stage, and can still ensure stable operation in the middle and later steel casting stages.
Preferably, the thickness of the blocking steel plate is not more than that of the circular arc side wall of the steel blocking groove main body. The unnecessary extension of the pouring time of the tundish caused by the over-thickness of the blocking steel plate can be avoided.
Preferably, the height of the bottommost end of the diversion hole is higher than that of the tundish bottom working lining. The method can prevent large-size impurities from entering and blocking a water gap, avoid the condition that the liquid level and the flow field in the crystallizer are unstable, stabilize the continuous production of a continuous casting machine and improve the quality of a casting blank.
Preferably, the diversion holes are a plurality of pairs, each pair of diversion holes are symmetrically arranged, and the symmetry plane is a plane perpendicular to the tundish bottom working lining where the axis of the steel retaining groove main body is located.
Yet another aspect of the present invention provides a tundish nozzle comprising:
a tundish nozzle main body;
the tundish nozzle steel retaining groove is arranged above the tundish nozzle main body, and the bottom edge of the tundish nozzle steel retaining groove is connected with the tundish bottom working lining.
Preferably, the bottom edge of the steel retaining groove main body is also provided with an anti-floating outer edge, the anti-floating outer edge is attached to the tundish bottom working lining, and the anti-floating outer edge is connected with the tundish bottom working lining through a fixing piece arranged on the anti-floating outer edge.
In a further aspect the utility model provides a tundish comprising a tundish nozzle as described above.
Compared with the prior art, the utility model has the following beneficial effects:
1. the tundish nozzle steel blocking groove is suitable for various tundishes without using stopper rods, the tundish nozzle steel blocking groove is arranged on a tundish nozzle, molten steel with low temperature enters a tundish which is not baked in place at the initial pouring stage of the tundish with low online baking temperature or molten steel with low temperature in a ladle, so that the temperature of the molten steel is reduced quickly, and the molten steel is condensed to cause blockage after the temperature is lower than the liquidus temperature of the molten steel; meanwhile, the tundish nozzle steel retaining groove is arranged on the tundish nozzle, so that the molten steel flow field around the nozzle can be changed, the vortex around the nozzle is prevented, and the nozzle is prevented from being eroded too fast; for a multi-flow tundish with different routes from molten steel to each nozzle, the nozzle steel retaining groove of the tundish can also avoid short-circuit distance molten steel flow and prolong the flow path of the molten steel as much as possible, so that inclusions in the molten steel have enough time to float to the surface of the molten steel and are adsorbed by the covering agent.
2. The tundish nozzle steel retaining groove is also provided with an anti-floating outer edge, and is fixed on the tundish bottom working lining through being matched with the fixed refractory material on the tundish bottom working lining, so that the defects of easy floating and instability of the tundish nozzle steel retaining groove can be overcome, the tundish nozzle steel retaining groove plays a role in the initial casting stage, and can still ensure stable operation in the middle and later steel casting stages.
Drawings
FIG. 1 is a schematic view of a tundish nozzle retaining groove of a tundish according to embodiment 1 of the utility model after installation;
FIG. 2 is a side sectional view of a tundish nozzle retaining groove according to embodiment 1 of the present invention;
FIG. 3 is a front view of a tundish nozzle retaining groove according to embodiment 1 of the utility model;
FIG. 4 is a top view of a tundish nozzle retaining groove according to embodiment 1 of the present invention.
Wherein: 1-a steel retaining groove main body; 2-barrier steel plate; 3-fixing a refractory material; 4-anti-floating outer edge; 5-tundish bottom working lining; 6-tundish nozzle body.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, 2, 3 and 4, the tundish nozzle steel retaining groove according to the embodiment includes a steel retaining groove main body 1 and a steel blocking plate 2.
The steel retaining groove body 1 is of an inverted groove-shaped structure with an arc-shaped cross section, two ends of the steel retaining groove body 1 are closed, an anti-floating outer edge 4 is arranged at the bottom edge of the steel retaining groove body 1, and the anti-floating outer edge 4 is suitable for being attached and connected with a tundish bottom working lining 5; 4 (2 pairs) of guide holes are arranged on the arc side wall of the steel retaining groove main body 1, each pair of guide holes are symmetrically arranged, the symmetrical plane is a plane where the axis of the steel retaining groove main body is located and perpendicular to a tundish bottom working lining, and the height of the bottommost end of the 4 guide holes is higher than that of the tundish bottom working lining;
the blocking steel plate 2 is arranged in the diversion hole, and the thickness of the blocking steel plate is not larger than that of the arc side wall of the steel blocking groove main body.
The preparation raw materials of the steel retaining groove main body comprise the following components in parts by mass:
25 parts of magnesia olive sand particles with the granularity of 3mm-5 mm; 20 parts of magnesium olive sand particles with the granularity of 1mm-3 mm; 15 parts of DMS-91 particles with the particle size of 0.083mm-1 mm; 20 parts of DMS-95 particles with the particle size of less than or equal to 0.074 mm; 10 parts of recycled magnesia carbon brick particles with the particle size of 0.083mm-1 mm; 3 parts of recycled magnesia carbon brick particles with the particle size of less than or equal to 0.074 mm; 4 parts of silicon micropowder; 0.1 part of organic fiber; 0.7 part of steel fiber; 0.15 part of sodium tripolyphosphate; 0.15 part of sodium hexametaphosphate.
The preparation method of the tundish nozzle steel retaining groove comprises the following steps:
s1, mixing the preparation raw materials of the steel retaining groove main body according to the selected mass parts;
s2, embedding a blocking steel plate at the position of the flow guide hole of the steel blocking groove main body in the die;
and S3, pouring and molding the mixed preparation raw materials in a mold with the pre-embedded barrier steel plate to obtain the tundish nozzle steel retaining groove.
Example 2
This embodiment the tundish nozzle, including tundish nozzle main part 6 and tundish nozzle steel-retaining groove, the structure of tundish nozzle steel-retaining groove is the same with embodiment 1, and tundish nozzle steel-retaining groove locates the top of tundish nozzle main part 6, and the bottom of the tundish nozzle steel-retaining groove prevents floating outer edge 4 and the laminating of tundish bottom work lining to prevent floating outer edge 3 on 4 and be connected with tundish bottom work lining 5 through locating.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (8)
1. The utility model provides a tundish nozzle steel blocking groove, its characterized in that includes:
the steel retaining groove comprises a steel retaining groove body, wherein the steel retaining groove body is of an inverted groove-shaped structure with an arc-shaped cross section, two ends of the steel retaining groove body are closed, and the bottom edge of the steel retaining groove body is suitable for being connected with a tundish bottom working lining; the arc side wall of the steel retaining groove main body is provided with a flow guide hole, and the steel retaining groove main body is made of refractory materials;
and the blocking steel plate is arranged in the diversion hole.
2. The tundish nozzle steel retaining groove of claim 1, wherein:
the bottom edge of the steel retaining groove main body is also provided with an anti-floating outer edge, and the anti-floating outer edge is suitable for being attached and connected with the tundish bottom working lining.
3. The tundish nozzle steel retaining groove of claim 1, wherein:
the thickness of the blocking steel plate is not more than that of the arc side wall of the steel blocking groove main body.
4. The tundish nozzle steel retaining groove of claim 1, wherein:
the height of the bottommost end of the flow guide hole is higher than that of the tundish bottom working lining.
5. The tundish nozzle steel retaining groove of claim 1, wherein:
the guide holes are in a plurality of pairs, each pair of guide holes are symmetrically arranged, and the symmetry plane is a plane where the axis of the steel retaining groove main body is perpendicular to the tundish bottom working lining.
6. A tundish nozzle, comprising:
a tundish nozzle main body;
the tundish nozzle steelmaking retaining groove of any one of claims 1 to 5, which is located above the tundish nozzle main body, and the bottom edge of the tundish nozzle steelmaking retaining groove is connected with the tundish bottom working lining.
7. A tundish nozzle as claimed in claim 6, wherein:
the bottom edge of the steel retaining groove main body is also provided with an anti-floating outer edge, the anti-floating outer edge is attached to the tundish bottom working lining, and the anti-floating outer edge is connected with the tundish bottom working lining through a fixing piece arranged on the anti-floating outer edge.
8. A tundish nozzle according to claim 6 or claim 7, including a tundish nozzle as claimed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122527784.1U CN216540828U (en) | 2021-10-20 | 2021-10-20 | Tundish nozzle steel retaining groove, tundish nozzle and tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122527784.1U CN216540828U (en) | 2021-10-20 | 2021-10-20 | Tundish nozzle steel retaining groove, tundish nozzle and tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216540828U true CN216540828U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122527784.1U Active CN216540828U (en) | 2021-10-20 | 2021-10-20 | Tundish nozzle steel retaining groove, tundish nozzle and tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216540828U (en) |
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2021
- 2021-10-20 CN CN202122527784.1U patent/CN216540828U/en active Active
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