CN114160765A - Square billet continuous casting dummy ingot assembly and continuous casting method using same - Google Patents
Square billet continuous casting dummy ingot assembly and continuous casting method using same Download PDFInfo
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- CN114160765A CN114160765A CN202111473802.0A CN202111473802A CN114160765A CN 114160765 A CN114160765 A CN 114160765A CN 202111473802 A CN202111473802 A CN 202111473802A CN 114160765 A CN114160765 A CN 114160765A
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- dummy bar
- dummy
- hook
- inner groove
- head body
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/08—Accessories for starting the casting procedure
- B22D11/081—Starter bars
Abstract
The invention provides a billet continuous casting dummy ingot assembly, which comprises a dummy ingot head body and a dummy ingot hook, wherein the dummy ingot head body is provided with a dummy ingot head; both ends of the dummy bar hook are hook-shaped, and the top of the dummy bar head body is provided with an inner groove which is concave downwards; the bottom of the dummy bar is provided with a through groove for being movably connected with the dummy bar; the inner groove is used for connecting the dummy bar hook, the longitudinal section of the inner groove is in a convex shape, the cross section of the inner groove is in a U shape, a gap formed by the inner groove extends to one side part of the dummy bar head body, a clamping groove penetrates through the middle part of the inner groove from top to bottom, a fixing piece is inserted into the clamping groove, one end of the fixing piece is inserted into the clamping groove to fix the dummy bar hook, a baffle plate perpendicular to the fixing piece is further arranged at the other end far away from the clamping groove, and a mounting hole for being sleeved with the dummy bar hook is formed in the middle of the baffle plate; by using the combined part, the dummy bar hook can be effectively and quickly fixed on the dummy bar head body, the time for replacing the casting time is shortened, and the production efficiency is improved.
Description
Technical Field
The invention relates to the field of continuous casting steel, in particular to a billet continuous casting dummy ingot assembly and a continuous casting method using the same.
Background
With the continuous progress and development of the steel-making continuous casting technology, in the field of metallurgical continuous casting technology, the dummy bar hook means an operation of continuously pulling out a high-temperature casting blank with a liquid core, which is initially solidified in a crystallizer, by means of the dummy bar hook on the dummy bar head when the continuous casting steel starts to be cast. Before casting, the dummy bar head of the dummy bar is arranged in the crystallizer to be used as a movable bottom of the crystallizer, so that the seam of the crystallizer is tightly blocked to prevent molten steel from flowing out. The molten steel poured into the crystallizer after casting is firmly connected with the dummy bar hook on the dummy bar head, the dummy bar is pulled downwards by a driving roller of a withdrawal and straightening machine or a supporting roller of a secondary cooling area, the hot blank initially solidified in the crystallizer is continuously pulled out of the casting machine, and the dummy bar head is separated from the dummy bar hook until the solidified casting blank enters the withdrawal and straightening machine.
At present, when a dummy bar hook is fixed due to the design of a dummy bar head in the production process of a continuous casting machine, the dummy bar hook needs to be manually inserted into a secondary cooling chamber, and a round hole on the side surface of the dummy bar head is punched by wood shavings to fix the dummy bar hook.
Such as: the prior art CN103357830B discloses a continuous casting dummy ingot device, wherein a round hole for fixing a dummy ingot hook is arranged on the side surface of a dummy ingot head, so that the operation difficulty is high, and safety accidents are easily caused; in addition, the device only uses a cotton rope to plug the gap between the dummy bar head and the crystallizer copper pipe, so that steel leakage is easy to occur.
Disclosure of Invention
Aiming at the problems, the invention provides a billet continuous casting dummy ingot assembly and a continuous casting method using the same, the dummy ingot assembly provided by the invention has compact structure, convenient operation, safety and reliability, the dummy ingot hook can be effectively and quickly fixed on a dummy ingot head body, so that personnel can finish the operation of fixing the dummy ingot hook above a crystallizer, the operation of fixing the dummy ingot hook in a secondary cooling chamber is not needed, the labor intensity of staff is reduced, the time for replacing and casting is shortened, the production rhythm is improved, and the safety of the staff is ensured; and the dummy ingot assembly can ensure that the baffle structure is more stable, and effectively prevent the occurrence of a steel leakage phenomenon.
In a first aspect, the invention relates to a billet continuous casting dummy ingot assembly, which comprises a dummy ingot head body and a dummy ingot hook; both ends of the dummy bar hook are hook-shaped, and the top of the dummy bar head body is provided with an inner groove which is concave downwards; the bottom of the dummy bar head body is provided with a through groove for being movably connected with a dummy bar;
the inner groove is used for being connected with the dummy bar hook, the longitudinal section of the inner groove is in a convex shape, the cross section of the inner groove is in a U shape, a notch formed by the inner groove extends to one side of the dummy bar head body, a clamping groove penetrates through the middle of the inner groove from top to bottom, a fixing piece is inserted into the clamping groove, one end of the fixing piece is inserted into the clamping groove to be used for fixing the dummy bar hook, the other end of the fixing piece is far away from the clamping groove, a baffle plate perpendicular to the fixing piece is further arranged at the other end of the clamping groove, and a mounting hole used for being sleeved with the dummy bar hook is formed in the middle of the baffle plate.
In some embodiments, the length of the U shape of the inner groove is matched with the length of the hook-shaped end part of the dummy bar hook, and the minimum width of the inner groove is consistent with the diameter of the dummy bar hook; after the dummy bar hook is inserted into the inner groove, the maximum width of the inner groove can ensure that the extension direction of the hook-shaped end part of the dummy bar hook rotates to the other direction.
In some embodiments, the locking groove extends downward from the upper surface of the dummy head body to a distance, and the length of the fixing piece is greater than the maximum width of the inner groove.
In some embodiments, the clamping groove is arranged close to the dummy bar hook, and when the dummy bar hook is inserted into the inner groove and rotated to the other direction, the clamping groove can be inserted with the fixing piece to further limit the position of the dummy bar hook.
In some embodiments, the upper surface of the baffles and the gap between them and the inner wall of the crystallizer are filled with asbestos cloth.
In some embodiments, the upper surface of the dummy bar head body is a slope, and the inclination angle is 5-10 ° in the horizontal direction.
In some embodiments, the hook-shaped ends of the dummy bar hook extend in the same direction.
In some embodiments, the dummy head body has a space between its upper surface and its lower surface, and the space is filled with asbestos fiber and iron filings.
In a second aspect, the present invention provides a method of continuous casting using the aforementioned billet continuous casting dummy bar assembly, comprising:
1) after the dummy bar is movably connected with the dummy head body through the through groove, the dummy head body is sent into the crystallizer by adopting a withdrawal and straightening machine;
2) inserting the dummy bar hook into the inner groove, and rotating the dummy bar hook to enable the extension direction of the hook-shaped end part to rotate to the other direction;
3) a fixing piece is inserted into the clamping groove to further limit the dummy bar hook;
4) the upper surface of the dummy bar head body is filled with asbestos fiber and scrap iron;
5) sleeving a baffle plate into the dummy ingot hook, wherein the baffle plate is in contact with a fixing plate and filled asbestos fibers and scrap iron, the fixing plate can provide a rigid support for the baffle plate, and the asbestos fibers and the scrap iron can provide an elastic support for the baffle plate;
6) and filling asbestos cloth on the upper surface of the baffle and between the upper surface of the baffle and the inner wall of the crystallizer, then putting cold steel into the baffle, and starting continuous casting.
In some embodiments, a dummy ingot box is further arranged above the baffle, and the cold steel in the step 6) is placed into the dummy ingot box.
Compared with the prior art, the invention has the following beneficial effects:
1) in the aspect of fixed installation of the dummy bar hook and the dummy bar head body, the top of the dummy bar head body is provided with the downward concave inner groove, the hook-shaped end part of the dummy bar hook is firstly placed in the inner groove by utilizing the gap formed in the length direction of the U-shaped shape of the inner groove, and then the extending direction of the hook-shaped end part of the dummy bar hook is rotated to the other direction by utilizing the convex structure of the inner groove through rotating the dummy bar hook, so that the aim of preventing the dummy bar hook from moving up and down is fulfilled; furthermore, a fixing piece is inserted into the clamping groove and is matched with the dummy bar hook for installation, and when the hook-shaped end part of the dummy bar hook rotates to the other direction, the fixing piece can be inserted for further limiting so as to replace the effect of a wooden pin in the prior art; by the fixed installation, an operator can finish the operation above the crystallizer without entering the secondary cooling chamber to fix the dummy ingot hook, so that the labor intensity of the worker is reduced, the time for replacing the dummy ingot hook is shortened, and the production efficiency is improved.
2) After the dummy ingot hook is sleeved in the baffle plate, the baffle plate can be in contact with the fixing plate and the filled asbestos fiber and scrap iron, so that the fixing plate can provide a rigid support for the baffle plate, and the asbestos fiber and the scrap iron can provide an elastic support for the baffle plate, so that the baffle plate is more stable, and the occurrence of steel leakage caused by the inclination of the baffle plate after casting is effectively prevented; in addition, asbestos fiber and iron fillings filled below the baffle still play sealed effect, can further prevent that the molten steel from leaking to the dummy bar head.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the structure of the assembly of the present invention in cooperation with a crystallizer;
FIG. 2 is a schematic structural view of a dummy head body according to the present invention;
fig. 3 is a top view of fig. 2.
1-dummy bar head body; 2-dummy ingot hook; 3, fixing a sheet; 4-a baffle plate; 5-asbestos cloth; 6-a crystallizer; 7-an inner groove; 8-a clamping groove; 9-through groove; 10-asbestos fibers and iron filings filler.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that the terms "horizontal", "vertical", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally place when used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "disposed," "mounted," and "connected" are to be construed broadly and may include, for example, a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 3, a billet continuous casting dummy bar assembly and a continuous casting method using the same according to an embodiment of the present application will be described in detail.
A continuous casting dummy ingot assembly of square billet comprises a dummy ingot head body 1 and a dummy ingot hook 2; both ends of the dummy bar hook 2 are hook-shaped, and the top of the dummy bar head body 1 is provided with an inner groove 7 which is concave downwards; the bottom of the dummy bar head body 1 is provided with a through groove 9 for movably connecting with a dummy bar (not shown in the figure);
the inner groove 7 is used for being connected with the dummy bar hook 2, the longitudinal section of the inner groove 7 is in a convex shape, the cross section of the inner groove 7 is in a U shape, a gap formed by the inner groove 7 extends to one side of the dummy bar head body 1, a clamping groove 8 penetrates through the middle of the inner groove 7 from top to bottom, a fixing piece 3 is inserted into the clamping groove 8, one end of the fixing piece 3 is inserted into the clamping groove 8 and used for fixing the dummy bar hook 2, a baffle 4 perpendicular to the fixing piece 3 is further arranged at the other end, far away from the clamping groove 8, of the fixing piece 3, and a mounting hole used for being sleeved with the dummy bar hook 2 is formed in the middle of the baffle 4.
In the embodiment, the U-shaped length of the inner groove 7 is matched with the length of the hook-shaped end part of the dummy bar hook 2, and the minimum width of the inner groove 7 is consistent with the diameter of the dummy bar hook 2 so as to allow the dummy bar hook 2 to be inserted; after the dummy bar hook 2 is inserted into the inner groove 7, the maximum width of the inner groove 7 can be enough to rotate the extending direction of the hook-shaped end part of the dummy bar hook 2 to another direction.
In this embodiment, the operator can fix the dummy bar hook 2 to the dummy bar head body 1 above the mold 6, and the hook-shaped end of the dummy bar hook 2 is first placed in the inner groove 7 by using the notch formed in the longitudinal direction of the U-shape of the inner groove 7, and the extending direction of the hook-shaped end is rotated to the other direction by rotating the dummy bar hook 2 by using the convex-shaped structure of the inner groove 7, thereby achieving the purpose of preventing the vertical movement of the dummy bar hook 2. Preferably, the minimum width of the inner groove 7 is consistent with the diameter of the dummy bar hook 2, so that the friction on the rotation of the dummy bar hook 2 is large, except for the forced rotation during installation or disassembly, the friction is large under other conditions, and the dummy bar hook 2 is not rotated to the direction consistent with the length of the U shape to prevent unhooking, so that the relative locking of the dummy bar hook 2 and the dummy bar head body 1 can be realized; after the hook-shaped end of the dummy bar hook 2 rotates in place, further, the fixing piece 3 is inserted into the clamping groove 8 to further limit the dummy bar hook 2, namely the fixing piece 3 replaces the effect of a wooden pin in the prior art, and therefore fixed installation is completed. The fixing operation is quick and effective, the operation can be completed by an operator above the crystallizer, the operator does not need to enter the secondary cooling chamber to do the operation of fixing the dummy ingot hook, the labor intensity of workers is reduced, the replacement time is shortened, the production rhythm is improved, and the safety of the workers is ensured.
In this embodiment, preferably, the slot 8 into which the fixing plate 3 is inserted is disposed closely to the dummy bar hook, and when the dummy bar hook 2 is inserted into the inner groove 7 and rotated to the other direction, the fixing plate 3 can be inserted into the slot 8 to further limit the position of the dummy bar hook 2, so as to prevent the dummy bar hook from rotating by itself and causing unhooking.
In this embodiment, the fixing plate 3 further supports the baffle 4 except for limiting the dummy bar hook 2, so that the baffle 4 is more stable, and the occurrence of steel leakage caused by the inclination of the baffle when receiving molten steel is effectively prevented.
In some embodiments, the clamping groove 8 extends downwards from the upper surface of the dummy bar head body 1 to a certain distance, the specific extending distance does not affect the rotation of the dummy bar hook 2, and after the fixing piece 3 is inserted into the clamping groove, the position of the fixing piece 3 is stable and does not shake during the operation of limiting the dummy bar hook 2 and the supporting baffle 4; in addition, the length of the fixing piece 3 is required to be larger than the maximum width of the inner groove 7 so as to prevent the fixing piece 3 from slipping into the recess below the inner groove 7.
In some embodiments, the anchor sheet 3 is 1 to 5mm (e.g., 2mm, 3mm, or 4mm, etc.) in thickness, 55 to 65mm (e.g., 57mm, 59mm, 60mm, 62mm, or 64mm, etc.) in length, and 50 to 60mm (e.g., 51mm, 53mm, 55mm, 57mm, or 59mm, etc.) in height; the width of the clamping groove 8 is matched with the thickness of the fixing piece 3, the length of the clamping groove 8 is matched with the length of the fixing piece 3, and the fixing piece 3 is not moved after being inserted; the fixing piece 3 is preferably made of steel sheet to improve rigidity and stability.
In some embodiments, the two hooked ends of the dummy bar hook 2 extend in the same direction, so that when the dummy bar hook is installed, a worker can conveniently judge the extending direction of the hooked end of the dummy bar hook inserted into the inner groove from the other end, and thus can know whether the dummy bar hook rotates or not so as to prevent the dummy bar hook from being displaced from the U-shaped gap.
In some embodiments, after the dummy bar hook 2 is sleeved with the baffle 4, the distance between the baffle 4 and the inner wall of the crystallizer 6 is less than or equal to 1 mm; the gap between the upper surface of the baffle 4 and the inner wall of the crystallizer is filled with asbestos cloth 5, and the fixing piece 3 is attached to the inner wall of the crystallizer 6 to form sealing so as to prevent steel leakage. Preferably, cold steel such as iron nails and iron balls is further placed above the asbestos cloth 5, so that the molten steel can be rapidly solidified after casting.
It will be appreciated that, in addition to the above-described cold steels such as nails, shot, etc., those skilled in the art may select other forms of cold steel so long as rapid solidification of molten steel is achieved.
In some embodiments, the material of the baffle 4 is preferably a steel sheet, and the thickness of the steel sheet is 2 to 5mm (e.g., 3mm, 4mm, etc.), so as to improve the rigidity and stability of the baffle.
In some embodiments, a dummy ingot box is arranged above the baffle 4, the dummy ingot box is sleeved on a dummy ingot hook, and the cold steel such as the iron nails and the iron shots is placed in the dummy ingot box to prevent the inner wall of the crystallizer from being scratched by the cold steel such as the iron nails and the iron shots during the continuous casting process.
In some embodiments, the upper surface of the dummy bar head body 1 is an inclined surface, and the inclined angle is 5 to 10 ° (e.g., 6 °, 7 °, 8 °, or 9 ° in the horizontal direction) to facilitate observation of an operator during installation, and if the upper surface is a plane, the position of the inner groove 7 and the position of the dummy bar hook 2 extending into the inner groove can be determined better by changing the angle, and if the upper surface is a plane, the extending position of the dummy bar hook 2 can be easily distinguished even if light rays in the mold are dark.
In some embodiments, the U-shaped notch of the inner groove 7 on the dummy bar head body 1 is oriented perpendicular to the inclined direction of the upper surface of the dummy bar head body 1, so that an operator can conveniently confirm the position of the inner groove 7, and the dummy bar hook 2 can be conveniently installed.
In some embodiments, the upper surface of the dummy bar head body 1 is separated from the lower surface of the baffle plate 4 by a certain distance, and the formed gap is filled with asbestos fiber and iron scrap fillers 10; preferably, the filled asbestos fibers and iron filings can be in close contact with the baffle 4, and can give the baffle 4 an elastic support; therefore, the fixing piece 3 is combined to rigidly support the baffle 4, and the dummy bar hook 2 is used for limiting the sleeving of the baffle 4, so that the baffle 4 is more stable, and the occurrence of steel leakage caused by the inclination of the baffle 4 after casting can be effectively prevented; in addition, because the asbestos fiber and the scrap iron are filled below the baffle plate 4, the function of preventing molten steel from leaking to the dummy bar head can be further achieved.
It can be understood that the asbestos fiber and the scrap iron can be filled in a layered manner, namely a layer of asbestos fiber and a layer of scrap iron; the concrete filling mode can be selected by the technicians in the field, and the concrete filling mode can be selected by the technicians only after filling is satisfied, and the filler is compact and stable.
The present invention still further provides a method of continuous casting using the aforementioned billet continuous casting dummy bar assembly, comprising:
1) after a dummy bar (not shown in the figure) is movably linked with the dummy head body 1 through a through groove 10, the dummy head body 1 is sent into a crystallizer 6 by a withdrawal and straightening machine (not shown in the figure);
specifically, the dummy bar head body 1 is fed from the lower part of the crystallizer 6, preferably, after the dummy bar head body 1 is fed, the ratio of the height of the dummy bar head body 1 in the crystallizer 6 to the length of the crystallizer 6 is 7:9, the control of the height of molten steel in the crystallizer can be effectively realized by controlling the ratio of the height of the dummy bar head body to the length of the crystallizer, and the casting stability and no steel leakage can be effectively realized by combining the pulling-down speed of the dummy bar.
2) An operator inserts the dummy bar hook 2 into the inner groove 7 above the crystallizer 6, and rotates the dummy bar hook 2 to enable the extension direction of the hook-shaped end part to rotate to the other direction;
3) a fixing piece 3 is inserted into the clamping groove 8 to further limit the dummy bar hook 2;
4) the upper surface of the dummy bar head body 1 is filled with asbestos fiber and iron scrap fillers 10;
5) sleeving the baffle 4 into the dummy bar hook 2, wherein the baffle 4 is in contact with the fixing sheet 3 and the filled asbestos fiber and iron filings, the fixing sheet 3 can provide a hard support for the baffle 4, and the asbestos fiber and iron filings filler 10 can provide an elastic support for the baffle 4;
6) and filling asbestos cloth 5 between the upper surface of the baffle 4 and the inner wall of the crystallizer 6, then putting cold steel, and starting continuous casting.
In some embodiments, a dummy ingot box is further arranged above the baffle, and the cold steel in the step 6) is placed into the dummy ingot box.
The following are specific applications of the billet continuous casting dummy bar assembly of the present invention:
example 1
< continuous casting of a billet having a cross-sectional dimension of 200X 200mm >
1) After the dummy bar is linked with the dummy head body, the dummy bar is sent into a crystallizer by a withdrawal and straightening machine, wherein the length of a crystallizer copper pipe of the casting machine is 900mm, and the dummy head body is arranged at the position with the height of 700mm in the crystallizer;
2) an operator inserts the dummy bar hook into the inner groove above the crystallizer, shifts one direction to tie the dummy bar hook transversely, and inserts a thin steel sheet with the length of 60mm, the width of 1.5mm and the height of 55mm into a clamping groove with the length of 60.5mm, the width of 2mm and the height of 40mm to fix the dummy bar hook, thereby replacing wood cutting;
3) after the thin steel sheet is inserted, filling asbestos fiber and scrap iron on the upper surface of the dummy bar head body in a layered mode, wherein the height of the filler is flush with that of the thin steel sheet;
4) a baffle (a thin steel plate with the thickness of 2mm) is sleeved in the end part of the dummy ingot hook, and the thin steel plate and the filled asbestos fiber and iron scrap filler are in contact with and support the baffle; asbestos cloth is filled in the gap between the upper surface of the baffle and the inner wall of the crystallizer for sealing; then adding cold steel;
5) after casting, the molten steel poured into the crystallizer is firmly connected with a dummy bar hook on a dummy bar head, a dummy bar is pulled by a supporting roll of a driving roll of a withdrawal and straightening machine to move downwards, a hot blank initially solidified in the crystallizer is continuously withdrawn from the casting machine until the solidified casting blank enters the withdrawal and straightening machine, and a thin steel sheet fixed between the dummy bar head and the dummy bar hook is separated under the pressure of a decoiling roll on a No. 6 withdrawal and straightening machine.
In the whole operation process, the casting is stable, no pull leakage exists, and compared with the method of fixing the dummy bar hook by wood cutting, the casting replacement time is shortened by 40%.
Example 2
Compared with the embodiment 1, in the step 1), the dummy bar head body is arranged at the position with the height of 600mm in the crystallizer.
As a result: in the operation process, the amount of molten steel in the crystallizer is large, the pulling speed needs to be reduced to ensure the stable casting and no pulling leakage, and compared with the embodiment 1, the casting time of replacement is shortened by 30 percent.
Example 3
Compared with the embodiment 1, in the step 1), the dummy bar head body is arranged at the position with the height of 800mm in the crystallizer.
As a result: in the operation process, less molten steel is in the crystallizer, and compared with the embodiment 1, the time for changing the casting time is shortened by 28 percent in order to ensure stable casting and no leakage.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A billet continuous casting dummy ingot assembly is characterized by comprising a dummy ingot head body and a dummy ingot hook; both ends of the dummy bar hook are hook-shaped, and the top of the dummy bar head body is provided with an inner groove which is concave downwards; the bottom of the dummy bar head body is provided with a through groove for being movably connected with a dummy bar;
the inner groove is used for being connected with the dummy bar hook, the longitudinal section of the inner groove is in a convex shape, the cross section of the inner groove is in a U shape, a notch formed by the inner groove extends to one side of the dummy bar head body, a clamping groove penetrates through the middle of the inner groove from top to bottom, a fixing piece is inserted into the clamping groove, one end of the fixing piece is inserted into the clamping groove to be used for fixing the dummy bar hook, the other end of the fixing piece is far away from the clamping groove, a baffle plate perpendicular to the fixing piece is further arranged at the other end of the clamping groove, and a mounting hole used for being sleeved with the dummy bar hook is formed in the middle of the baffle plate.
2. The billet continuous casting dummy bar assembly according to claim 1, wherein the U-shaped length of the inner groove is matched with the length of the hook-shaped end of the dummy bar hook, and the minimum width of the inner groove is consistent with the diameter of the dummy bar hook; after the dummy bar hook is inserted into the inner groove, the maximum width of the inner groove can ensure that the extension direction of the hook-shaped end part of the dummy bar hook rotates to the other direction.
3. The billet continuous casting dummy bar assembly according to claim 2, wherein the catching groove extends downward from the upper surface of the dummy bar head body to a distance, and the length of the fixing piece is greater than the maximum width of the inner groove.
4. The continuous billet casting dummy ingot assembly according to claim 2, wherein the slot is closely attached to the dummy ingot hook, and when the dummy ingot hook is inserted into the inner groove and rotated to the other direction, the slot is inserted with the fixing piece to further limit the position of the dummy ingot hook.
5. The billet continuous casting dummy ingot assembly according to claim 1, wherein the upper surface of the baffle and the gap between the baffle and the inner wall of the mold are filled with asbestos cloth.
6. The continuous billet casting dummy ingot assembly according to claim 1, wherein the upper surface of the dummy ingot head body is an inclined surface, and the inclined angle is 5 to 10 ° in the horizontal direction.
7. The billet continuous casting dummy bar assembly according to claim 1, wherein the hook-shaped ends of the dummy bar hook extend in the same direction.
8. The continuous billet casting dummy bar assembly according to claim 1, wherein the upper surface of the dummy bar head body is spaced from the lower surface of the baffle plate by a certain distance, and a gap is formed by filling asbestos fiber and iron filings.
9. A method of continuous casting using the billet continuous casting dummy bar assembly of claims 1-8, characterized in that:
1) after the dummy bar is movably connected with the dummy head body through the through groove, the dummy head body is sent into the crystallizer by adopting a withdrawal and straightening machine;
2) inserting the dummy bar hook into the inner groove, and rotating the dummy bar hook to enable the extension direction of the hook-shaped end part to rotate to the other direction;
3) a fixing piece is inserted into the clamping groove to further limit the dummy bar hook;
4) the upper surface of the dummy bar head body is filled with asbestos fiber and scrap iron;
5) sleeving the baffle plate into the dummy ingot hook, wherein the baffle plate is in contact with the fixing plate and the filled asbestos fiber and iron scrap filler, the fixing plate can provide a rigid support for the baffle plate, and the asbestos fiber and iron scrap filler can provide an elastic support for the baffle plate;
6) and filling asbestos cloth in the gap between the upper surface of the baffle and the inner wall of the crystallizer, and then putting cold steel into the gap to start continuous casting.
10. The continuous casting method according to claim 9, wherein a dummy ingot box is further provided above the baffle, and the cold steel in step 6) is placed in the dummy ingot box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111473802.0A CN114160765A (en) | 2021-11-30 | 2021-11-30 | Square billet continuous casting dummy ingot assembly and continuous casting method using same |
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| CN202111473802.0A CN114160765A (en) | 2021-11-30 | 2021-11-30 | Square billet continuous casting dummy ingot assembly and continuous casting method using same |
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| CN114160765A true CN114160765A (en) | 2022-03-11 |
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| CN (1) | CN114160765A (en) |
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| CN115055655A (en) * | 2022-05-14 | 2022-09-16 | 江阴兴澄特种钢铁有限公司 | Casting device and method for oversized continuous casting round billet |
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| CN115055655A (en) * | 2022-05-14 | 2022-09-16 | 江阴兴澄特种钢铁有限公司 | Casting device and method for oversized continuous casting round billet |
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