CN116586597B - Device and method for preventing tundish nozzle from nodulation - Google Patents
Device and method for preventing tundish nozzle from nodulation Download PDFInfo
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- CN116586597B CN116586597B CN202310871935.6A CN202310871935A CN116586597B CN 116586597 B CN116586597 B CN 116586597B CN 202310871935 A CN202310871935 A CN 202310871935A CN 116586597 B CN116586597 B CN 116586597B
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- 230000024121 nodulation Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000011449 brick Substances 0.000 claims abstract description 250
- 238000001179 sorption measurement Methods 0.000 claims abstract description 123
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000012535 impurity Substances 0.000 claims abstract description 21
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 42
- 238000007789 sealing Methods 0.000 claims description 35
- 229910052786 argon Inorganic materials 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 claims description 3
- RWDBMHZWXLUGIB-UHFFFAOYSA-N [C].[Mg] Chemical compound [C].[Mg] RWDBMHZWXLUGIB-UHFFFAOYSA-N 0.000 claims description 3
- RGKMZNDDOBAZGW-UHFFFAOYSA-N aluminum calcium Chemical compound [Al].[Ca] RGKMZNDDOBAZGW-UHFFFAOYSA-N 0.000 claims description 3
- -1 aluminum-zirconium-carbon Chemical compound 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000005350 fused silica glass Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 5
- 238000009749 continuous casting Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 206010035148 Plague Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- B22D41/50—Pouring-nozzles
- B22D41/507—Pouring-nozzles giving a rotating motion to the issuing molten metal
-
- 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
- B22D41/50—Pouring-nozzles
- B22D41/58—Pouring-nozzles with gas injecting means
-
- 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
- B22D41/50—Pouring-nozzles
- B22D41/60—Pouring-nozzles with heating or cooling means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a device and a method for preventing a tundish nozzle from nodulation, wherein the device comprises a tundish, an upper nozzle brick, a lower nozzle brick, a nozzle, a sliding plate brick, an adsorption brick and a hydraulic cylinder, wherein the tundish and the nozzle are fixedly connected through the upper nozzle brick and the lower nozzle brick; the water gap is sequentially provided with an air inlet pipe, a first air chamber and air holes, and a plurality of air holes are uniformly formed in the inner wall of the water gap and are communicated with the first air chamber and the vertical through holes in the water gap for molten steel to circulate. According to the invention, the impurities can be adsorbed by the adsorption bricks, the adsorption bricks are replaced by the hydraulic cylinders, the whole process does not need to stop pouring, and the operation is simple, convenient and quick.
Description
Technical Field
The invention belongs to the technical field of continuous casting, and particularly relates to a device and a method for preventing tundish nozzle from nodulation.
Background
Continuous casting has advantages of improving metal yield and reducing energy consumption, which are in line with the requirements of sustainable development, compared with conventional die casting. The realization of full continuous casting simplifies the steelmaking production process, shortens the flow and obviously improves the production efficiency. The tundish is an intermediate link of the steelmaking production flow and is a connecting point for changing from intermittent operation to continuous operation. Tundish as metallurgical reactor is an important part of improving the yield and quality of steel. The tundish function is not negligible, whether it is a smooth operation of continuous casting or a satisfactory quality of molten steel. The tundish is a refractory vessel which receives molten steel from a ladle and distributes it from the tundish nozzle to the individual moulds.
Preventing submerged nozzle nodulation is always a difficult problem which plagues steel mills to normally produce high-quality steel, the nozzle nodulation mainly comprises deoxidization products, coagulated steel, complex oxide agglomerates and the like, and the forming of the nodulation comprises four steps: 1. the molten steel contains more deoxidized products, secondary oxidized products and other impurities, which are necessary conditions for forming knots; 2. the inclusion particles move to the inner wall of the water gap and contact with the water gap material; 3. the particles are attached to the surface of the refractory material; 4. the particles adhere to each other, sinter and form a network. Therefore, the removal of inclusions becomes a key to preventing nozzle clogging.
At present, the impurity is removed by adopting an adsorption-replacement step, namely, the impurity is captured and adsorbed firstly, and then the adsorption component is replaced, but when the adsorption component is replaced, casting is required to be stopped, the replacement process is complex, and the overall efficiency is affected.
Disclosure of Invention
Aiming at the problems that pouring is required to be stopped and the replacement process is complex when impurities are removed in the prior art, the invention provides a device and a method for preventing a tundish nozzle from nodulation.
The present invention achieves the above technical object by the following means.
The device for preventing the tundish nozzle from nodulation is characterized by comprising a tundish, an upper nozzle brick, a lower nozzle brick, a nozzle, a sliding plate brick, an adsorption brick and a hydraulic cylinder, wherein the tundish and the nozzle are fixedly connected through the upper nozzle brick and the lower nozzle brick; one end of the sliding plate brick is connected with the hydraulic cylinder; the tundish, the upper nozzle brick, the adsorption brick, the lower nozzle brick and the nozzle are all provided with vertical through holes, and the vertical through holes are correspondingly connected up and down to form a channel for molten steel circulation; the water gap is sequentially provided with an air inlet pipe, a first air chamber and a plurality of air holes, wherein the air holes are uniformly formed in the inner wall of the water gap and are communicated with the first air chamber and a vertical through hole in the water gap for molten steel to circulate.
Further, the diameter of the vertical through hole for molten steel to flow in the adsorption brick is larger than that of the vertical through holes for molten steel to flow in the upper nozzle brick and the lower nozzle brick.
Furthermore, the adsorption brick is of an inverted truncated cone structure with a large upper part and a small lower part, and two inverted truncated cone-shaped mounting holes matched with the adsorption brick are formed in the sliding plate brick; the adsorption groove is a hemispherical groove.
Further, the contact part of the upper nozzle brick and the lower nozzle brick with the sliding plate brick is respectively provided with an upper sealing groove and a lower sealing groove which are communicated with each other, and the upper sealing groove and the lower sealing groove are respectively provided with a plurality of grooves and are arranged around the sliding plate brick.
Further, a second air chamber which is communicated with the first air chamber and the lower sealing groove is arranged on the lower nozzle brick.
Further, a plurality of heating rods are arranged on the left side and the right side of the two adsorption bricks, and the heating rods are fixed on the sliding plate bricks.
Furthermore, the connection part of the sliding plate brick and the hydraulic cylinder is fixedly connected with a heat insulation plate.
Further, the heat insulating plate is made of one of refractory bricks, refractory castable and ceramics.
Further, the adsorption brick is made of one of aluminum-carbon, aluminum-zirconium-carbon, fused quartz, magnesium-carbon and aluminum-calcium.
The invention relates to a method for preventing tundish nozzle from nodulation, which is characterized by comprising the following specific operation steps:
s1, before pouring a tundish, two adsorption bricks are mounted on a slide plate brick, and then the slide plate brick is moved to a proper position through a hydraulic cylinder, so that vertical through holes on one adsorption brick are opposite to vertical through holes on a water inlet brick and a water outlet brick, and the vertical through holes are correspondingly connected up and down to form a complete channel for molten steel circulation;
s2, starting heating rods on the left side and the right side of the adsorption brick to be adsorbed, and preheating the adsorption brick to enable the temperature of the adsorption brick to reach the temperature of molten steel;
s3, hot argon is introduced into the air inlet pipe, a part of the hot argon flows through the first air chamber and the air holes in sequence until entering the water gap, a stable argon environment is provided, and meanwhile, the water gap is preheated; the other part of hot argon flows through the first air chamber, the second air chamber, the lower sealing groove and the upper sealing groove in sequence, and the upper sealing groove and the lower sealing groove are matched to realize double sealing on the joint of the upper nozzle brick, the sliding plate brick and the lower nozzle brick;
s4, continuously pouring molten steel from the tundish, injecting high-speed molten steel into the crystallizer through a water gap in the pouring process, forming turbulent vortex in the adsorption brick when the molten steel passes through the adsorption brick, and enabling impurities in the molten steel to collide with the inner wall of the adsorption brick and be adsorbed on the inner wall of the adsorption brick, wherein the probability of collision between the impurities in the molten steel and the inner wall of the adsorption brick is increased by the adsorption groove;
s5, after a certain amount of impurities are adsorbed on the inner wall of the adsorption brick, starting a heating rod on the left side and the right side of the adsorption brick which is not adsorbed to heat the adsorption brick;
s6, after the temperature of the adsorption bricks reaches the temperature of molten steel, starting a hydraulic cylinder to move the adsorption bricks which are not adsorbed to the joint of the upper nozzle bricks and the lower nozzle bricks, so that vertical through holes on the adsorption bricks which are not adsorbed are opposite to vertical through holes on the upper nozzle bricks and the lower nozzle bricks, and connecting the vertical through holes up and down correspondingly to form a complete channel for molten steel circulation;
s7, detaching the adsorption bricks with the impurities adsorbed, and replacing the adsorption bricks which are not adsorbed.
The beneficial effects of the invention are as follows:
when the molten steel passes through the adsorption brick, turbulent vortex is formed in the adsorption brick, and impurities in the molten steel collide with the inner wall of the adsorption brick and are adsorbed on the inner wall of the adsorption brick. The adsorption grooves increase the collision probability of inclusions in molten steel and the inner wall of the adsorption brick, enhance the adsorption effect of the adsorption brick and reduce the inclusion content at the water inlet. Meanwhile, a stable argon gas environment can be provided for the water gap through the air inlet pipe, the first air chamber and the air holes, so that a small amount of impurities which are not adsorbed by the adsorption bricks are prevented from adhering to the inner wall of the water gap, and further, the water gap is effectively prevented from being nodulated or blocked.
After adsorbing the inclusion of a certain amount when adsorbing the brick inner wall, still accessible pneumatic cylinder is changed the adsorption brick that does not carry out the adsorption brick, need not to stop pouring in the change process, and easy operation, convenient and fast. The upper seal groove, the lower seal groove and the second air chamber are arranged, so that double sealing of labyrinth sealing and argon sealing can be realized on the contact part among the upper nozzle brick, the sliding plate brick and the lower nozzle brick; meanwhile, the heating rod can heat the adsorption bricks which are not adsorbed yet, so that the temperature of the adsorption bricks reaches the temperature of molten steel, the influence on the quality of the molten steel is avoided, and further the smooth operation of the replacement of the adsorption bricks is ensured.
Drawings
Fig. 1 is a schematic view of an apparatus for preventing tundish nozzle nodulation according to the present invention.
Fig. 2 is an enlarged schematic view of fig. 1 at a in accordance with the present invention.
FIG. 3 is a cross-sectional view B-B of FIG. 1 in accordance with the present invention.
Fig. 4 is a schematic perspective view of the adsorption brick according to the present invention.
Fig. 5 is a cross-sectional view of an absorbent brick according to the present invention.
In the figure, 1. A tundish; 21. a water feeding brick; 22. a water outlet brick; 23. an upper seal groove; 24. a lower seal groove; 25. a second air chamber; 3. a water gap; 31. an air inlet pipe; 32. a first air chamber; 33. air holes; 4. a slide plate brick; 5. adsorbing bricks; 51. an adsorption tank; 6. a hydraulic cylinder; 7. a heating rod; 8. and the heat insulation plate.
Description of the embodiments
The invention will be further described with reference to the drawings and the specific embodiments, but the scope of the invention is not limited thereto.
The device for preventing the tundish nozzle from nodulation comprises a tundish 1, an upper nozzle brick 21, a lower nozzle brick 22, a nozzle 3, a slide plate brick 4, adsorption bricks 5 and a hydraulic cylinder 6, wherein the tundish 1 and the nozzle 3 are fixedly connected through the upper nozzle brick 21 and the lower nozzle brick 22, the slide plate brick 4 is slidably arranged at the joint of the upper nozzle brick 21 and the lower nozzle brick 22, two adsorption bricks 5 are detachably arranged on the slide plate brick 4, the distance between the two adsorption bricks 5 is greater than or equal to half of the width of the upper nozzle brick 21 and the lower nozzle brick 22, and when one adsorption brick 5 adsorbs, the other adsorption brick 5 completely moves out of the upper nozzle brick 21 and the lower nozzle brick 22. As shown in fig. 4-5, the adsorption brick 5 has an inverted circular truncated cone structure with a large upper part and a small lower part, two inverted circular truncated cone-shaped mounting holes matched with the adsorption brick 5 are formed in the sliding plate brick 4, and the adsorption brick 5 can be detached and mounted only by taking up and putting in the adsorption brick 5, so that the operation is convenient and quick. The adsorption brick 5 is made of one of aluminum-carbon, aluminum-zirconium-carbon, fused quartz, magnesium-carbon and aluminum-calcium, and can work at high temperature by adopting a high-temperature refractory material. The diameter of the vertical through holes for molten steel flowing in the adsorption brick 5 is larger than that of the vertical through holes for molten steel flowing in the upper nozzle brick 21 and the lower nozzle brick 22, so that turbulent vortex is formed in the adsorption brick 5 when molten steel passes through the adsorption brick 5, and impurities in the molten steel collide with the inner wall of the adsorption brick 5 and are adsorbed on the inner wall of the adsorption brick 5. The adsorption brick 5 is provided with a plurality of hemispherical adsorption grooves 51 on the inner wall, so that the probability of collision between inclusions in molten steel and the inner wall of the adsorption brick 5 is increased, the adsorption effect of the adsorption brick 5 is further enhanced, and the inclusion content at the water inlet 3 is reduced.
One end of the sliding plate brick 4 is connected with a hydraulic cylinder 6 to provide power for the sliding plate brick 4 to move in the upper nozzle brick 21 and the lower nozzle brick 22. The tundish 1, the upper nozzle brick 21, the adsorption brick 5, the lower nozzle brick 22 and the nozzle 3 are all provided with vertical through holes, and the vertical through holes are correspondingly connected up and down to form a channel for molten steel circulation, so that the poured molten steel can be injected into the crystallizer from the tundish 1. The air inlet pipe 31, the first air chamber 32 and the air holes 33 are sequentially arranged on the water gap 3, the air holes 33 are uniformly formed in the inner wall of the water gap 3 and are communicated with the first air chamber 32 and the vertical through holes in the water gap 3 for molten steel to circulate, when hot argon is introduced into the air inlet pipe 31, the hot argon can sequentially flow through the first air chamber 32 and the air holes 33 until entering the water gap 3, a stable argon environment is provided, a stable argon blowing effect is ensured, a small amount of impurities which are not adsorbed by the adsorption bricks 5 are prevented from adhering to the inner wall of the water gap 3, and further, water gap nodulation or blockage is effectively prevented.
The contact parts of the upper nozzle brick 21 and the lower nozzle brick 22 with the sliding plate brick 4 are respectively provided with an upper sealing groove 23 and a lower sealing groove 24 which are communicated with each other, and the upper sealing groove 23 and the lower sealing groove 24 are respectively provided with a plurality of sealing grooves and are arranged around the sliding plate brick 4 so as to carry out labyrinth seal on the contact parts among the upper nozzle brick 21, the sliding plate brick 4 and the lower nozzle brick 22. The lower nozzle brick 22 is provided with a second air chamber 25 which is communicated with the first air chamber 32 and the lower seal groove 24, and a part of hot argon flows through the first air chamber 32, the second air chamber 25, the lower seal groove 24 and the upper seal groove 23 in sequence to seal the contact part among the upper nozzle brick 21, the slide plate brick 4 and the lower nozzle brick 22 by argon. The argon gas seal cooperates with the labyrinth seal to realize double sealing, so that leakage of molten steel from the junction of the upper nozzle brick 21, the sliding plate brick 4 and the lower nozzle brick 22 can be better prevented, and smooth replacement of the adsorption brick 5 is ensured.
The left and right sides of two absorption bricks 5 all are provided with many heating rods 7, and heating rod 7 is fixed on slide brick 4, when needs change absorption brick 5, and accessible absorption brick 5 both sides heating rod 7 heats absorption brick 5 that has not carried out the absorption yet, until absorption brick 5 temperature reaches the molten steel temperature, contact molten steel when preventing that absorption brick 5 after changing from being less than the molten steel temperature, and then influences molten steel quality. The thermal insulation plate 8 is fixedly connected to the joint of the sliding brick 4 and the hydraulic cylinder 6, the thermal insulation plate 8 is made of one of refractory bricks, refractory castable and ceramics, and the thermal insulation plate 8 can prevent high temperature of the sliding brick 4 from being transferred to the hydraulic cylinder 6, so that the precision and the service life of the hydraulic cylinder 6 are affected, namely, the hydraulic cylinder 6 is protected to a certain extent.
The invention relates to a method for preventing tundish nozzle from nodulation, which comprises the following steps:
s1, before pouring a tundish 1, two adsorption bricks 5 are installed on a slide brick 4, and then the slide brick 4 is moved to a proper position through a hydraulic cylinder 6, so that vertical through holes on one adsorption brick 5 are opposite to vertical through holes on an upper nozzle brick 21 and a lower nozzle brick 22, and the vertical through holes are correspondingly connected up and down to form a complete channel for molten steel circulation.
S2, starting heating rods 7 on the left side and the right side of the two sides of the adsorption brick 5 to be adsorbed, and preheating the adsorption brick 5 to enable the temperature of the adsorption brick 5 to reach the temperature of molten steel.
S3, hot argon is introduced into the air inlet pipe 31, and a part of the hot argon flows through the first air chamber 32 and the air holes 33 in sequence until entering the water gap 3, so that a stable argon environment is provided, and meanwhile, the water gap 3 is preheated; the other part of hot argon gas sequentially flows through the first air chamber 32, the second air chamber 25, the lower sealing groove 24 and the upper sealing groove 23, and the upper sealing groove 23 and the lower sealing groove 24 are matched to realize double sealing on the joint among the upper nozzle brick 21, the sliding plate brick 4 and the lower nozzle brick 22.
S4, continuously pouring molten steel from the tundish 1, injecting high-speed molten steel into a crystallizer through the water gap 3 in the pouring process, forming turbulent vortex in the adsorption brick 5 when the molten steel passes through the adsorption brick 5, and enabling impurities in the molten steel to collide with the inner wall of the adsorption brick 5 and be adsorbed on the inner wall of the adsorption brick 5, wherein the probability of collision between the impurities in the molten steel and the inner wall of the adsorption brick 5 is increased by the adsorption groove 51.
S5, after a certain amount of impurities are adsorbed on the inner wall of the adsorption brick 5, starting the heating rods 7 on the left side and the right side of the adsorption brick 5 which are not adsorbed to heat the adsorption brick 5.
S6, after the temperature of the adsorption bricks 5 reaches the temperature of molten steel, starting the hydraulic cylinder 6 to move the adsorption bricks 5 which are not adsorbed to the joint of the upper nozzle bricks 21 and the lower nozzle bricks 22, so that vertical through holes on the adsorption bricks 5 which are not adsorbed are opposite to vertical through holes on the upper nozzle bricks 21 and the lower nozzle bricks 22, and connecting the vertical through holes vertically to form a complete channel for molten steel circulation.
S7, detaching the adsorption bricks 5 with the impurities adsorbed, and replacing the adsorption bricks 5 which are not adsorbed.
In the process of replacing the adsorption bricks 5, the pouring does not need to be stopped, and the method is simple to operate, convenient and quick.
The examples are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.
Claims (8)
1. The device for preventing the tundish nozzle from nodulation is characterized by comprising a tundish (1), an upper nozzle brick (21), a lower nozzle brick (22), a nozzle (3), a sliding plate brick (4), an adsorption brick (5) and a hydraulic cylinder (6), wherein the tundish (1) and the nozzle (3) are fixedly connected through the upper nozzle brick (21) and the lower nozzle brick (22), the sliding plate brick (4) is slidably arranged at the joint of the upper nozzle brick (21) and the lower nozzle brick (22), two adsorption bricks (5) are detachably arranged on the sliding plate brick (4), the distance between the two adsorption bricks (5) is greater than or equal to half of the widths of the upper nozzle brick (21) and the lower nozzle brick (22), and when one of the adsorption bricks (5) adsorbs, the other adsorption brick (5) completely moves out of the upper nozzle brick (21) and the lower nozzle brick (22), and a plurality of adsorption grooves (51) are formed in the inner wall of the adsorption brick (5); one end of the sliding plate brick (4) is connected with a hydraulic cylinder (6); the tundish (1), the upper nozzle brick (21), the adsorption brick (5), the lower nozzle brick (22) and the nozzle (3) are all provided with vertical through holes, and the vertical through holes are correspondingly connected up and down to form a channel for molten steel circulation; the water gap (3) is sequentially provided with an air inlet pipe (31), a first air chamber (32) and a plurality of air holes (33), wherein the air holes (33) are uniformly formed on the inner wall of the water gap (3) and are communicated with the first air chamber (32) and a vertical through hole in the water gap (3) for molten steel to circulate; an upper sealing groove (23) and a lower sealing groove (24) which are communicated with each other are respectively arranged at the contact positions of the upper nozzle brick (21) and the lower nozzle brick (22) and the sliding plate brick (4), and the upper sealing groove (23) and the lower sealing groove (24) are respectively provided with a plurality of sealing grooves which are arranged around the sliding plate brick (4); the lower nozzle brick (22) is provided with a second air chamber (25) communicated with the first air chamber (32) and the lower sealing groove (24).
2. The device for preventing the tundish nozzle from nodulation according to claim 1, wherein the diameter of the vertical through holes for molten steel to flow in the adsorption brick (5) is larger than the diameter of the vertical through holes for molten steel to flow in the upper nozzle brick (21) and the lower nozzle brick (22).
3. The device for preventing the tundish nozzle from nodulation according to claim 1, wherein the adsorption brick (5) is of an inverted truncated cone structure with a large upper part and a small lower part, and two inverted cone-shaped mounting holes matched with the adsorption brick (5) are formed in the sliding plate brick (4); the adsorption groove (51) is a hemispherical groove.
4. The device for preventing the tundish nozzle from nodulation according to claim 1, wherein a plurality of heating rods (7) are arranged on the left side and the right side of the two adsorption bricks (5), and the heating rods (7) are fixed on the sliding plate bricks (4).
5. Device for preventing a tundish nozzle according to claim 4, characterized in that the connection of the slide brick (4) and the hydraulic cylinder (6) is fixedly connected with a heat insulating plate (8).
6. The device for preventing the tundish nozzle from nodulation according to claim 5, wherein the heat insulating plate (8) is made of one of refractory bricks, refractory castable and ceramics.
7. The device for preventing the tundish nozzle from nodulation according to claim 1, wherein the adsorbing brick (5) is made of one of aluminum-carbon, aluminum-zirconium-carbon, fused quartz, magnesium-carbon and aluminum-calcium.
8. A method for preventing tundish nozzle from nodulation, which is characterized by adopting the device for preventing tundish nozzle from nodulation as claimed in any one of claims 1 to 7, and comprises the following specific operation steps:
s1, before pouring a tundish (1), installing two adsorption bricks (5) on a slide plate brick (4), and then moving the slide plate brick (4) to a proper position through a hydraulic cylinder (6), so that vertical through holes on one adsorption brick (5) are opposite to vertical through holes on an upper nozzle brick (21) and a lower nozzle brick (22), and the vertical through holes are correspondingly connected up and down to form a complete channel for molten steel circulation;
s2, starting heating rods (7) on the left side and the right side of the adsorption brick (5) to be adsorbed, and preheating the adsorption brick (5) to enable the temperature of the adsorption brick (5) to reach the temperature of molten steel;
s3, hot argon is introduced into the air inlet pipe (31), a part of the hot argon flows through the first air chamber (32) and the air hole (33) in sequence until entering the water gap (3), a stable argon environment is provided, and meanwhile, the water gap (3) is preheated; the other part of hot argon flows through the first air chamber (32), the second air chamber (25), the lower sealing groove (24) and the upper sealing groove (23) in sequence, and the upper sealing groove (23) and the lower sealing groove (24) are matched to realize double sealing on the joint among the upper nozzle brick (21), the sliding plate brick (4) and the lower nozzle brick (22);
s4, continuously pouring molten steel from the tundish (1), wherein in the pouring process, high-speed molten steel is injected into a crystallizer through a water gap (3), turbulent vortex is formed in the adsorption brick (5) when the molten steel passes through the adsorption brick (5), impurities in the molten steel collide with the inner wall of the adsorption brick (5) and are adsorbed on the inner wall of the adsorption brick (5), and the probability of collision between the impurities in the molten steel and the inner wall of the adsorption brick (5) is increased by the adsorption groove (51);
s5, after a certain amount of impurities are adsorbed on the inner wall of the adsorption brick (5), starting heating rods (7) on the left side and the right side of the adsorption brick (5) which are not adsorbed to heat the adsorption brick (5);
s6, after the temperature of the adsorption bricks (5) reaches the temperature of molten steel, starting a hydraulic cylinder (6) to move the adsorption bricks (5) which are not adsorbed to the joint of the upper nozzle brick (21) and the lower nozzle brick (22), so that vertical through holes on the adsorption bricks (5) which are not adsorbed are opposite to vertical through holes on the upper nozzle brick (21) and the lower nozzle brick (22), and connecting the vertical through holes vertically to form a complete channel for molten steel circulation;
s7, disassembling the adsorption bricks (5) with the impurities adsorbed, and replacing the adsorption bricks (5) which are not adsorbed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310871935.6A CN116586597B (en) | 2023-07-17 | 2023-07-17 | Device and method for preventing tundish nozzle from nodulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310871935.6A CN116586597B (en) | 2023-07-17 | 2023-07-17 | Device and method for preventing tundish nozzle from nodulation |
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| CN116586597A CN116586597A (en) | 2023-08-15 |
| CN116586597B true CN116586597B (en) | 2023-10-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398004A (en) * | 2011-11-29 | 2012-04-04 | 中冶南方工程技术有限公司 | Sliding waterslot device capable of preventing vortex |
| CN202180202U (en) * | 2011-07-14 | 2012-04-04 | 郑州市高原耐火材料有限公司 | Lower nozzle brick for steel pouring |
| CN106493347A (en) * | 2016-10-25 | 2017-03-15 | 华北理工大学 | Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption |
| CN207402104U (en) * | 2017-09-29 | 2018-05-25 | 江苏高鑫高温新材料科技有限公司 | A kind of fast sprue-replacing device of stopper rod of tundish cooperation |
| CN207887873U (en) * | 2018-01-09 | 2018-09-21 | 武汉科技大学 | The anti-dross device of double zigzags for continuous casting production exit |
-
2023
- 2023-07-17 CN CN202310871935.6A patent/CN116586597B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202180202U (en) * | 2011-07-14 | 2012-04-04 | 郑州市高原耐火材料有限公司 | Lower nozzle brick for steel pouring |
| CN102398004A (en) * | 2011-11-29 | 2012-04-04 | 中冶南方工程技术有限公司 | Sliding waterslot device capable of preventing vortex |
| CN106493347A (en) * | 2016-10-25 | 2017-03-15 | 华北理工大学 | Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption |
| CN207402104U (en) * | 2017-09-29 | 2018-05-25 | 江苏高鑫高温新材料科技有限公司 | A kind of fast sprue-replacing device of stopper rod of tundish cooperation |
| CN207887873U (en) * | 2018-01-09 | 2018-09-21 | 武汉科技大学 | The anti-dross device of double zigzags for continuous casting production exit |
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| CN116586597A (en) | 2023-08-15 |
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