CN113290236A - Molten steel purification device for continuous casting tundish - Google Patents
Molten steel purification device for continuous casting tundish Download PDFInfo
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- CN113290236A CN113290236A CN202110602804.9A CN202110602804A CN113290236A CN 113290236 A CN113290236 A CN 113290236A CN 202110602804 A CN202110602804 A CN 202110602804A CN 113290236 A CN113290236 A CN 113290236A
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- stopper rod
- molten steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/001—Retaining slag during pouring molten metal
- B22D43/004—Retaining slag during pouring molten metal by using filtering means
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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
- Y02P10/20—Recycling
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- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
本发明涉及中间包领域，具体来说是一种连铸中间包钢液净化装置，包括过滤套筒；所述过滤套筒上设有穿接孔；所述过滤套筒套接在塞棒结构上；本发明公开了一种连铸中间包钢液净化装置，本发明通过过滤套筒的设置，可以对钢水进行净化，同时过滤套筒设置在浸入式水口正上方，过滤套筒改变了塞棒主体附近钢水的流动方向，因此可以抑制汇流旋涡的形成，防止卷渣对结晶器钢水的污染。
The invention relates to the field of tundish, in particular to a continuous casting tundish molten steel purification device, comprising a filter sleeve; the filter sleeve is provided with a penetrating hole; the filter sleeve is sleeved on a stopper rod structure The invention discloses a continuous casting tundish molten steel purification device. The invention can purify molten steel through the setting of the filter sleeve. The flow direction of molten steel near the main body of the rod can therefore suppress the formation of confluence vortices and prevent the contamination of molten steel in the mold by slag entrainment.
Description
Technical Field
The invention relates to the field of tundishes, in particular to a molten steel purification device for a continuous casting tundish.
Background
The market demand for clean steel is continuously increasing, and the requirement for the cleanliness of the steel is higher and higher. The continuous casting process is a core link of the steel production process and is a technological process for casting liquid molten steel into a casting blank with a certain section shape and a certain size specification.
The tundish is an important refractory material container in the continuous casting process and plays roles of shunting, decompressing, continuous casting and the like, wherein the function of removing impurities in molten steel is also an important function of the tundish; the tundish supplies molten steel to the crystals through the submerged nozzles, and the crystallizer of the tundish molten steel determines the cleanliness of casting blanks to a great extent, so how to improve the cleanliness of the tundish molten steel becomes an important direction of attention of metallurgical workers.
For this reason, flow control elements such as a turbulence suppressor, a slag dam, and a slag dam are generally used to improve a tundish flow field and promote floating removal of inclusions, and an electromagnetic purification technology, an air curtain retaining wall technology, and the like have been developed.
However, small-particle inclusions are difficult to float upwards and remove, the equipment cost of the electromagnetic purification technology is high, the requirements on the size, uniformity and stability of the bubble particle size in the air curtain retaining wall technology are high, and the practical application is few.
Meanwhile, the traditional purifying equipment has a complex structure and high production cost, and the tundish and related structures can be greatly changed.
Therefore, in order to solve the above problems, it is necessary to provide a molten steel purification apparatus.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a purification device with small changes to a tundish and related structures.
In order to achieve the purpose, the invention adopts the technical scheme that:
a continuous casting tundish molten steel purification device comprises a filtering sleeve; the filtering sleeve is provided with a through hole; the filtering sleeve is sleeved on the stopper rod structure.
The end part of the filtering sleeve is provided with a steel guide groove.
The vertical section of the steel guide groove is arc-shaped.
The stopper rod structure comprises a stopper rod main body, and a stopper rod boss is arranged on the stopper rod main body.
The through holes comprise lower through holes and upper through holes, and the inner diameter of each upper through hole is smaller than that of each lower through hole; the inner diameter of the upper through hole is smaller than the outer diameter of the plug rod boss.
An annular check ring is arranged in the upper through hole.
The material of the filtering sleeve and the annular retainer ring is porous refractory material.
The stopper rod structure is connected with a lifting mechanism; the lifting mechanism comprises a supporting beam, and the supporting beam is connected with the stopper rod main body; the supporting beam is connected with a driving part.
The height of the lower through hole is not less than the distance from the upper end face of the stopper rod boss to the lower end face of the stopper rod main body.
The inner diameter of the lower through hole is smaller than the outer diameter of the plug rod boss.
The invention has the advantages that:
the invention discloses a molten steel purification device for a continuous casting tundish, which can purify molten steel by arranging a filter sleeve, and the filter sleeve is arranged right above a submerged nozzle and changes the flowing direction of the molten steel near a stopper rod main body, thereby inhibiting the formation of confluence vortex and preventing the molten steel of a crystallizer from being polluted by slag entrapment.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic view of the present invention in use;
FIG. 4 is a schematic view of an optimized structure of the annular retainer ring of the present invention;
FIG. 5 is a schematic view of the optimized filter cartridge of the present invention;
fig. 6 is a partially enlarged view of the area a in fig. 4.
Wherein: 1-an annular retainer ring; 2-a filter cartridge; 3-a steel guide groove; 4-a submerged entry nozzle; 5-tundish; 6-a drive section; 7-a support beam; 8-stopper boss; 9-stopper rod body.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
A continuous casting tundish molten steel purification device comprises a filtering sleeve 2; the filtering sleeve 2 is provided with a through hole 21; the filtering sleeve 2 is sleeved on the stopper rod structure; the invention discloses a molten steel purification device for a continuous casting tundish, which can enable most of molten steel to enter an immersion type water gap 4 through a filter sleeve 2 by arranging the filter sleeve 2, and when the molten steel flows through the transition sleeve, the filter sleeve 2 is equivalent to a filter screen structure, thereby realizing the filtering operation of the molten steel and achieving the effect of purifying the molten steel; meanwhile, in order to ensure that the filtering sleeve 2 is sleeved on the stopper rod structure; the filter sleeve 2 is provided with a through hole 21, the through hole 21 can be a through hole structure, and can also be a structure disclosed below, and the main purpose is to realize that the filter sleeve 2 is sleeved on a stopper rod structure.
Preferably, the end part of the filtering sleeve 2 is provided with a steel guide groove 3; the steel guide groove 3 is arranged at the end part of the transition sleeve, and the steel guide groove 3 is generally arranged at one side of the filtering sleeve 2 close to the submerged nozzle; due to the arrangement of the steel guide groove 3, even if the micropores of the filtering sleeve 2 are blocked at the later stage of the casting time, the casting process can be normally carried out due to the arrangement of the steel guide groove 3, so that the casting process is not influenced; in addition, as a greater optimization, the vertical section of the steel guide groove 3 is arc-shaped; the vertical section of the steel guide groove 3 is semicircular, so that the structural design is convenient for molten steel to flow from the steel guide groove 3, and the problem that edges at the periphery of the steel guide groove 3 are not beneficial to molten steel flow is solved; meanwhile, in order to reduce excessive molten steel flowing out of the steel guide groove 3, the opening of the steel guide groove 3 far away from the submerged nozzle 4 is smaller than the opening of the steel guide groove 3 close to the submerged nozzle 4, so that the excessive molten steel flowing out of the steel guide groove 3 can be reduced, and the purifying effect of the invention is influenced.
Preferably, the stopper structure comprises a stopper body 9, wherein a stopper boss 8 is arranged on the stopper body 9; the stopper rod main body 9 can adopt a traditional stopper rod main body 9 structure, and the stopper rod main body 9 is mainly provided with a stopper rod boss 8 and a stopper rod boss 8, wherein one function of the stopper rod boss 8 is a supporting table or a hanging table, and the filter sleeve 2 can be driven to move up and down by the up-and-down movement of the stopper rod structure, so that the movement of the position of the filter sleeve 2 can be realized.
Preferably, the through hole 21 in the present invention includes a lower through hole 211 and an upper through hole 212, and an inner diameter of the upper through hole 212 is smaller than an inner diameter of the lower through hole 211; the inner diameter of the upper through hole 212 is smaller than the outer diameter of the stopper rod boss 8; according to the invention, through the arrangement of the through holes 21, the stopper rod structure can pass through the filter sleeve 2, and meanwhile, the filter sleeve 2 cannot be separated from the stopper rod structure due to gravity, so that the subsequent lifting of the filter sleeve 2 is facilitated; the inner diameter of the lower through hole is larger than the diameter of the plug rod boss, and the inner diameter of the upper through hole is smaller than the diameter of the plug rod boss.
Preferably, in the present invention, an annular retainer ring 1 is disposed in the upper through hole 212; the annular retainer ring 1 plays a role of reducing the inner diameter of the upper through hole 212, so that the stopper rod main body 9 can conveniently pass through the upper part of the filter sleeve 2; meanwhile, the annular retainer ring and the filtering sleeve can be of an integral structure, and a split structure can be designed; for example, the outer side of the annular retainer ring is provided with a clamping block 12, and the inner wall of an upper through hole on the transition sleeve is provided with a clamping groove 14; the annular retainer ring is clamped in the clamping groove 14 through the clamping block 12, so that the annular retainer ring and the transition sleeve are of a detachable connecting structure, and the annular retainer ring is convenient to detach and mount; meanwhile, the clamping block 12 is connected with the annular retainer ring through a buffer mechanism, the buffer mechanism comprises a placing groove 11 arranged on the annular retainer ring, and the placing groove 11 is communicated with the outer side of the annular retainer ring through a communicating groove 16; the end part of the clamping block 12 is provided with a limiting block 15, and the size of the limiting block is larger than that of the communicating groove, so that the limiting block can be prevented from being separated from the communicating groove; a buffer spring 13 is arranged in the placing groove 11, the clamping block 12 is connected in the placing groove 11 through a limiting block 15, one end of the buffer spring 13 is communicated with the bottom of the placing groove 11, and the other end of the buffer spring 13 is connected with the clamping block 12 through the limiting block 15; the invention adopts the connection mode, thereby facilitating the replacement operation of the annular retainer ring; in addition, in order to facilitate disassembly, the clamping groove 14 can penetrate through the annular retainer ring, so that the inner side of the clamping groove 14 is communicated with the upper through hole, and the other side of the clamping groove is communicated with the outer side of the filtering sleeve; by the arrangement, the annular retainer ring can be conveniently detached subsequently.
In addition, the material of the filtering sleeve 2 and the annular retainer ring is porous refractory material; through the design, the filter sleeve 2 and the annular retainer ring are low in production cost and more convenient to use in actual production.
Preferably, the stopper rod structure is connected with a lifting mechanism; the lifting mechanism comprises a supporting beam 7, and the supporting beam 7 is connected with a stopper rod main body 9; the supporting beam 7 is connected with a driving part 6; in the invention, the driving part 6 drives the supporting beam 7 to move up and down, and the supporting beam 7 moves up and down to drive the stopper rod main body 9 to move up and down, thereby realizing the up and down movement of the filtering sleeve 2; the lifting mechanism disclosed by the invention can realize the change of the longitudinal position of the filtering sleeve 2 and better meet the design requirement; the driving part can adopt a motor or a driving device such as a hydraulic cylinder.
Preferably, the height of the lower through hole 211 is not less than the distance from the upper end surface of the stopper rod boss 8 to the lower end surface of the stopper rod main body 9; due to the arrangement, the filter sleeve 2 can be prevented from being jacked up by the plug rod boss 8, so that the lower end face of the filter sleeve 2 cannot be contacted with the lower end face of the tundish 5; affecting the purification operation of molten steel.
Preferably, in the present invention, the inner diameter of the lower through hole 211 is smaller than the outer diameter of the stopper rod boss 8; with such an arrangement, the motion interference between the stopper rod boss 8 and the lower through hole 211 can be avoided.
Preferably, the diameter of the stopper boss 8 is 1.4 to 1.5 times the diameter of the stopper body 9; the height of the stopper rod boss 8 is 1.5-2 times of the diameter of the stopper rod main body 9; due to the size design, after the filter sleeve is sleeved on the stopper rod main body, the weight of the filter sleeve can be borne by the stopper rod boss, and meanwhile, the strength of the stopper rod is ensured, so that the stopper rod is convenient to hoist and mount; the distance from the upper end surface of the stopper rod boss 8 to the lower end part of the stopper rod main body 9 is two thirds of the normal working liquid level of the molten steel in the tundish 5; the size design is convenient for positioning the height of the lower through hole; the inner diameter of the lower through hole 211 is 1.2-1.4 times of the diameter of the stopper rod boss 8; such a dimensioning is made in order to facilitate the sleeving of the filtering sleeve onto the stopper rod body; the difference between the outer diameter of the filter sleeve 2 and the inner diameter of the lower through hole 211 is the same as the diameter of the stopper rod main body 9, and the filter sleeve has a certain wall thickness to form a certain filter channel and an inclusion adsorption accommodating space.
Concretely;
the invention discloses a molten steel purification device of a continuous casting tundish 5, which mainly comprises a filter sleeve 2, an annular retainer ring, a stopper rod main body 9 and a stopper rod boss 8; the filtering sleeve 2 and the annular retainer ring are of an integrally formed structure and can be connected in a detachable mode, for example, the annular retainer ring and the filtering sleeve 2 are connected by a clamping component; the annular retainer ring is positioned at the top of the filtering sleeve 2 and is coaxial with the filtering sleeve 2; the lower part of the filtering sleeve 2 is uniformly provided with steel guide grooves 3;
the stopper rod boss 8 is arranged on the stopper rod main body 9, and the stopper rod main body 9 and the stopper rod boss 8 are also of an integrally formed structure; the diameter of the stopper rod boss 8 is 1.4-1.5 times of the diameter of the stopper rod main body 9, the height of the stopper rod boss 8 is 1.5-2 times of the diameter of the stopper rod main body 9, and the distance from the upper end surface of the stopper rod boss 8 to the lower end part of the stopper rod main body 9 is 2/3 of the normal working liquid level of the molten steel in the tundish 5; the inner diameter of the filtering sleeve 2 is 1.2-1.4 times of the diameter of the stopper rod boss 8, and the difference value between the outer diameter and the inner diameter of the filtering sleeve 2 is the same as the diameter of the stopper rod main body 9; the inner diameter of the annular retainer ring is 1.1-1.2 times of the diameter of the stopper rod main body 9, the outer diameter of the annular retainer ring is the same as the outer diameter of the filtering sleeve 2, and the height of the annular retainer ring is equal to the wall thickness of the filtering sleeve 2; the distance from the lower end face of the annular retainer ring to the lower end face of the filter sleeve 2 is the same as the distance from the upper end face of the stopper rod boss 8 to the lower end of the stopper rod main body 9.
The steel guide grooves 3 are semicircular, the radius of the steel guide grooves is 3-5cm, and the number of the steel guide grooves 3 is 3-5.
The material of the filtering sleeve 2 and the annular retainer ring is porous refractory material.
The material of the stopper rod boss 8 is the same as that of the stopper rod main body 9.
This device is when using, with the passing of stopper rod main part 9 filter sleeve 2, makes filter sleeve 2 hang on stopper rod main part 9 through stopper rod boss 8, then is fixed in stopper rod supporting beam 7 with stopper rod main part 9 on, makes stopper rod main part 9 be located immersion nozzle 4 directly over, stopper rod supporting beam 7 and stopper rod lift portion are connected, and stopper rod lift portion is fixed in on the outer wall of package 5 in the middle of the continuous casting.
This device is in the use, and near the molten steel of stopper stick main part 9 in continuous casting tundish 5, most need flow through filter sleeve 2 and annular retaining ring rear and can flow into immersion nozzle 4, because filter sleeve 2 and annular retaining ring are porous refractory material, its microporous structure can effectively adsorb the inclusion of getting rid of in the molten steel, especially tiny inclusion, play the purification molten steel, reach the purpose that improves the molten steel cleanliness factor.
At the end of the casting time, even if micropores of the filtering sleeve 2 and the annular retainer ring are blocked by the adsorbed and gathered impurities, because the steel guide groove 3 is formed at the lower part of the filtering sleeve 2, the molten steel can normally enter the submerged nozzle 4, and the casting process is not influenced.
The structure of the original tundish 5 is not changed, and only the stopper boss 8 is arranged on the original stopper main body 9 and then the independently manufactured filter sleeve 2 is assembled, so that the improvement cost is low, the manufacture is easy and the operation is simple.
Because the filtering sleeve 2 can adsorb and remove impurities in the molten steel, the cleanliness of the molten steel can be effectively improved, and the quality of casting blanks is improved.
The existence of the filter sleeve 2 changes the flow direction of the molten steel near the stopper rod main body 9, thereby inhibiting the formation of confluent vortex and preventing the contamination of the crystallizer molten steel by slag entrapment.
By adopting the technical scheme of the invention, slag entrapment can be prevented, so that the casting allowance of molten steel can be reduced, and the billet yield can be improved.
Because the lower part of the filtering sleeve 2 is provided with the steel guide groove 3, even if the micropores of the filtering sleeve 2 are blocked at the later stage of the casting time, the casting process can be normally carried out, and the casting process cannot be influenced.
Example 1:
a molten steel purification device of a continuous casting tundish 5 consists of a filter sleeve 2, an annular retainer ring, a stopper rod main body 9 and a stopper rod boss 8; the filtering sleeve 2 and the annular retainer ring are of an integrally formed structure, and the annular retainer ring is positioned at the top of the filtering sleeve 2 and is coaxial with the filtering sleeve 2; the lower part of the filtering sleeve 2 is uniformly provided with steel guide grooves 3;
the stopper rod boss 8 is arranged on the stopper rod main body 9, and the stopper rod main body 9 and the stopper rod boss 8 are also of an integrally formed structure; the diameter of the stopper rod boss 8 is 1.45 times of the diameter of the stopper rod main body 9, the height of the stopper rod boss 8 is 1.7 times of the diameter of the stopper rod main body 9, and the distance from the upper end surface of the stopper rod boss 8 to the lower end part of the stopper rod main body 9 is 2/3 of the normal working liquid level of the molten steel in the tundish 5; the inner diameter of the filtering sleeve 2 is 1.3 times of the diameter of the stopper rod boss 8, and the difference value between the outer diameter and the inner diameter of the filtering sleeve 2 is the same as the diameter of the stopper rod main body 9; the inner diameter of the annular retainer ring is 1.15 times of the diameter of the stopper rod main body 9, the outer diameter of the annular retainer ring is the same as the outer diameter of the filtering sleeve 2, and the height of the annular retainer ring is equal to the wall thickness of the filtering sleeve 2; the distance from the lower end face of the annular retainer ring to the lower end face of the filter sleeve 2 is the same as the distance from the upper end face of the stopper rod boss 8 to the lower end of the stopper rod main body 9.
The shape of leading steel groove 3 is semi-circular, and its radius is 4cm, leads the quantity of steel groove 3 and is 4.
The material of the filtering sleeve 2 and the annular retainer ring is porous refractory material.
The material of the stopper rod boss 8 is the same as that of the stopper rod main body 9.
As shown in fig. 3, when the device is used, the stopper rod main body 9 is passed through the filter sleeve 2, the filter sleeve 2 is suspended on the stopper rod main body 9 through the stopper rod boss 8, then the stopper rod main body 9 is fixed on the stopper rod supporting beam 7, the stopper rod main body 9 is positioned right above the submerged nozzle 4, the stopper rod supporting beam 7 is connected with the stopper rod lifting part, and the stopper rod lifting part is fixed on the outer wall of the continuous casting tundish 5.
Example 2
A molten steel purification device of a continuous casting tundish 5. The procedure of example 1 was followed, except for the following technical parameters.
The diameter of the stopper rod boss 8 is 1.4-1.45 times or 1.45-1.5 times of the diameter of the stopper rod main body 9, and the height of the stopper rod boss 8 is 1.5-1.7 times or 1.7-2 times of the diameter of the stopper rod main body 9;
the inner diameter of the filtering sleeve 2 is 1.2-1.3 times or 1.3-1.4 times of the diameter of the stopper rod boss 8;
the inner diameter of the annular retainer ring is 1.1 to 1.15 times or 1.15 to 1.2 times of the diameter of the stopper rod main body 9;
the steel guide grooves 3 are semicircular, the radius of the steel guide grooves is 3-4cm or 4-5cm, and the number of the steel guide grooves 3 is 3 or 5.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (10)
1. A molten steel purification device of a continuous casting tundish is characterized by comprising a filtering sleeve; the filtering sleeve is provided with a through hole; the filtering sleeve is sleeved on the stopper rod structure.
2. The apparatus as claimed in claim 1, wherein the filtering sleeve has a steel guide groove at its end.
3. The continuous casting tundish molten steel purification device of claim 2, wherein the vertical section of the steel guide groove is arc-shaped.
4. The molten steel purification device of the continuous casting tundish of claim 1, wherein the stopper structure comprises a stopper body, and a stopper boss is arranged on the stopper body.
5. The molten steel purification device for the continuous casting tundish according to claim 4, wherein the through holes comprise a lower through hole and an upper through hole, and the inner diameter of the upper through hole is smaller than that of the lower through hole; the inner diameter of the upper through hole is smaller than the outer diameter of the plug rod boss.
6. The molten steel purification device for the continuous casting tundish according to claim 5, wherein an annular retainer ring is arranged in the upper through hole.
7. The molten steel purification device of the continuous casting tundish of claim 6, wherein the material of the filter sleeve and the annular retainer ring is porous refractory material.
8. The molten steel purification device for the continuous casting tundish according to claim 1, wherein the stopper rod structure is connected with a lifting mechanism; the lifting mechanism comprises a supporting beam, and the supporting beam is connected with the stopper rod main body; the supporting beam is connected with a driving part.
9. The molten steel purification device for the continuous casting tundish according to claim 5, wherein the height dimension of the lower through hole is not less than the distance from the upper end surface of the stopper rod boss to the lower end surface of the stopper rod main body.
10. The molten steel purification device for the continuous casting tundish according to claim 5, wherein the inner diameter of the lower through hole is smaller than the outer diameter of the plug rod boss; the inner diameter of the lower through hole is larger than the outer diameter of the plug rod boss.
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| CN116765365A (en) * | 2021-12-23 | 2023-09-19 | 赵洋 | Automatic casting equipment for molten aluminum |
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| CN210632938U (en) * | 2019-07-25 | 2020-05-29 | 邯郸钢铁集团有限责任公司 | Device for preventing nozzle of continuous casting tundish from being blocked |
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| CN116765365A (en) * | 2021-12-23 | 2023-09-19 | 赵洋 | Automatic casting equipment for molten aluminum |
| CN114769570A (en) * | 2022-04-11 | 2022-07-22 | 李中海 | A casting system for ductile iron |
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