CN115283630A - Continuous casting method - Google Patents

Continuous casting method Download PDF

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Publication number
CN115283630A
CN115283630A CN202211005780.XA CN202211005780A CN115283630A CN 115283630 A CN115283630 A CN 115283630A CN 202211005780 A CN202211005780 A CN 202211005780A CN 115283630 A CN115283630 A CN 115283630A
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China
Prior art keywords
continuous casting
dummy bar
nail
casting method
bar head
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Granted
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CN202211005780.XA
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Chinese (zh)
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CN115283630B (en
Inventor
孙亮
刘珍童
毕泽阳
刘风刚
胡卫东
刘春阳
常朋飞
冀建立
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Beijing Shougang Co Ltd
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Beijing Shougang Co Ltd
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Priority to CN202211005780.XA priority Critical patent/CN115283630B/en
Publication of CN115283630A publication Critical patent/CN115283630A/en
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Publication of CN115283630B publication Critical patent/CN115283630B/en
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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
    • B22D11/088—Means for sealing the starter bar head in the moulds
    • 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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/108—Feeding additives, powders, or the like
    • 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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/112—Treating the molten metal by accelerated cooling
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Abstract

The invention discloses a continuous casting method, relates to the technical field of metallurgy, and solves the technical problem that quality defects are caused because nail chips are not completely adhered by molten steel in the related technology. The method comprises the steps of loading a dummy bar into a continuous casting machine, and conveying a dummy bar head of the dummy bar into a crystallizer of the continuous casting machine; after the dummy bar head of the dummy bar is sent into a crystallizer of a continuous casting machine, nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed into the crystallizer and the dummy bar head. The nail chips with the diameter of 10-15mm and the length of 10-15mm are arranged for cooling and sealing, gaps among the nail chip layers formed by the nail chips are larger than the gaps in the prior art, molten steel can conveniently flow into all the gaps among the nail chips at the beginning of casting, and the molten steel can adhere all the nail chips, so that no nail chips are scattered in the casting process, the quality problem caused by scattering of small-particle nail chips which are not adhered with the molten steel in a continuous casting fan-shaped section is solved, and the method has the effect of protecting a dummy head and has popularization value.

Description

Continuous casting method
Technical Field
The invention relates to the technical field of metallurgy, in particular to a continuous casting method.
Background
In the continuous casting process of many steel enterprises, nail scraps are used as a cold material for cooling and sealing. The nail chips can rapidly cool the molten steel to form a blank shell with a certain thickness and can also protect the generation of cracks caused by overheating of the dummy bar head to a certain extent.
The sizes of conventionally applied nail scraps are 3-7mm in diameter and 3-7mm in length, the adding amount of the nail scraps or the thickness of the nail scraps added into a crystallizer in continuous casting production of different enterprises are different, the adding amount of the nail scraps is usually large in whole in order to ensure the casting safety, and in the casting-throwing process, a plurality of nail scraps which are not adhered with molten steel exist and are scattered in a continuous casting fan-shaped section, so that the nail scraps are easily accumulated in the fan-shaped section, and further the quality problem is caused.
Disclosure of Invention
The application provides a continuous casting method, which solves the technical problem that quality defects are caused because nail chips are not completely adhered by molten steel in the related technology.
The present application provides a continuous casting method, comprising: loading a dummy bar into a continuous casting machine, and conveying a dummy bar head of the dummy bar into a crystallizer of the continuous casting machine; after the dummy bar head of the dummy bar is sent into a crystallizer of a continuous casting machine, nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed into the crystallizer and the dummy bar head.
Optionally, distributing the nail scraps into the crystallizer and the dummy ingot head by adopting a distributing device;
the distributing device comprises:
the top and the bottom of the material distribution frame are arranged in an open mode, the transverse section of an inner cavity of the material distribution frame is the same as the maximum transverse section of a casting blank produced by a continuous casting method, jacks are formed in the peripheral side of the material distribution frame, and the pore passage direction of the jacks is arranged along the transverse direction of the inner cavity; and
the plug board is movably arranged in the jack of the cloth frame and can cover the transverse section of the inner cavity, and the plug board is provided with a handheld part which is used for assisting the plug board to enter and exit the inner cavity of the cloth frame along the jack.
Optionally, the handle is provided as a handle.
Optionally, the material distribution frame is provided with two insertion holes along one opposite sides of the circumferential side, the material distribution device comprises two insertion plates which are movably mounted in the two insertion holes respectively, and the two insertion plates cover the transverse section of the inner cavity together when contacting.
Optionally, the transverse cross section of the inner cavity of the cloth frame is rectangular.
Optionally, after the dummy bar head of the dummy bar is fed into the mold of the continuous casting machine and before the nail chips with the diameter of 10-15mm and the length of 10-15mm are distributed into the mold and on the dummy bar head, the continuous casting method further comprises:
and (3) plugging a gap between the dummy bar head and the crystallizer by adopting refractory cotton or asbestos ropes.
Optionally, after the gap between the dummy bar head and the crystallizer is plugged by refractory cotton or asbestos rope, and before the nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed into the crystallizer and on the dummy bar head, the continuous casting method further comprises:
and paving a layer of asbestos cloth or coating a layer of protective paint on the end face of the head of the dummy bar head.
Optionally, nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed into the crystallizer and on the dummy ingot head, wherein the nail scraps are distributed according to 43-52 kg/m according to different steel types of casting blanks 2 Adding the mixture.
Optionally, the continuous casting method further comprises:
the measuring tool is used for distributing nail scraps and comprises a measuring cylinder and a handle connected with the measuring cylinder, and scales and transparent observation windows are arranged on the measuring cylinder at the peripheral side.
Optionally, after distributing nail scraps with the diameter of 10-15mm and the length of 10-15mm into the crystallizer and onto the dummy bar head, the continuous casting method further comprises the following steps:
and stacking a layer of spiral cold material on the nail chips or stacking a layer of grid cold material and a layer of spiral cold material in sequence, wherein the continuous casting machine has a casting condition after stacking.
The beneficial effect of this application is as follows: the application provides a continuous casting method, which comprises the steps of loading a dummy bar into a continuous casting machine, conveying a dummy bar head of the dummy bar into a crystallizer of a continuous casting machine, and distributing nail scraps with the diameter of 10-15mm and the length of 10-15mm into the crystallizer and the dummy bar head; the nail chips with the diameter of 10-15mm and the length of 10-15mm are arranged for cooling and sealing, gaps among the nail chip layers formed by the nail chips are larger than the gaps in the prior art, molten steel can conveniently flow into all the gaps among the nail chips at the beginning of casting, and the molten steel can adhere all the nail chips, so that no nail chips are scattered in the casting process, the quality problem caused by scattering of small-particle nail chips which are not adhered with the molten steel in a continuous casting fan-shaped section is solved, and the method has the effect of protecting a dummy head and has popularization value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly introduced, and it is apparent that the drawings in the description are only some embodiments of the present invention.
FIG. 1 is a schematic flow diagram of a continuous casting process provided herein;
FIG. 2 is a top view of a distribution device in the continuous casting process provided herein;
FIG. 3 is a side view of a distribution device in the continuous casting process provided herein;
FIG. 4 is a front view of a material distribution device in the continuous casting method provided herein;
fig. 5 is a schematic structural diagram of a gauge in the continuous casting method provided in the present application.
The attached drawings are marked as follows: 100-material distribution device, 110-material distribution frame, 120-plug board, 121-handheld part, 200-measuring tool, 210-measuring cylinder, 220-handle, 230-scale and 240-transparent observation window.
Detailed Description
The embodiment of the application provides a continuous casting method, and solves the technical problem that quality defects are caused because nail scraps are not completely adhered to molten steel in the related technology.
In order to solve the technical problems, the general idea of the embodiment of the present application is as follows:
a continuous casting method comprising: loading a dummy bar into a continuous casting machine, and conveying a dummy bar head of the dummy bar into a crystallizer of the continuous casting machine; after the dummy bar head of the dummy bar is sent into a crystallizer of a continuous casting machine, nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed into the crystallizer and the dummy bar head.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
The inventor finds that nail scraps are paved on a dummy bar head in the continuous steel casting production process, the nail scraps are generally selected to be 3-7mm in diameter and 3-7mm in length, the nail scrap adding amount is usually large in whole for the purpose of ensuring the pouring safety, in the casting-throwing process, due to the fact that the nail scraps are small in particle diameter, molten steel is difficult to flow deeply into nail scrap gaps, and a plurality of small-particle nail scraps which are not adhered with the molten steel are scattered in a continuous casting fan-shaped section, so that accumulation in the fan-shaped section is easily caused, and further quality problems are caused.
Referring to fig. 1, the present embodiment discloses a continuous casting method, including: loading a dummy bar into a continuous casting machine, and conveying a dummy bar head of the dummy bar into a crystallizer of the continuous casting machine; after the dummy bar head of the dummy bar is sent into a crystallizer of a continuous casting machine, nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed into the crystallizer and the dummy bar head.
Specifically, nail chips with the diameter of 10-15mm and the length of 10-15mm are arranged for cooling and sealing, gaps among nail chip layers formed by the nail chips are larger than the gaps in the prior art, molten steel can conveniently flow into all the gaps among the nail chips at the beginning of casting, and the molten steel can adhere all the nail chips, so that no nail chips are scattered in the casting process, and the quality problem caused by scattering of small-particle nail chips which are not adhered with the molten steel in a continuous casting fan section is solved. The method also has the effect of protecting the dummy bar head and has popularization value.
The above diameter and length defining the nail chips means that the nail chips are cylindrical. In an alternative embodiment, the staple is produced by cutting a cylindrical strip, where the absolute plane is not well grasped and thus irregularities are present in the shape of the ends of the staple, as explained below.
Optionally, referring to fig. 1, after the dummy bar head of the dummy bar is sent to a specified position inside the crystallizer of the continuous casting machine, and before the nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed in the crystallizer and on the dummy bar head, the continuous casting method further comprises plugging a gap between the dummy bar head and the crystallizer by using refractory cotton or asbestos rope.
Optionally, after the gap between the dummy bar head and the crystallizer is plugged by refractory cotton or asbestos rope, and before the nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed into the crystallizer and on the dummy bar head, the continuous casting method further comprises: and paving a layer of asbestos cloth or coating a layer of protective paint on the end face of the head of the dummy bar head. By paving a layer of asbestos cloth or coating a layer of protective coating on the end face of the head of the dummy bar head, the problem that molten steel is easy to contact with the dummy bar head due to large gaps among nail scraps in the embodiment is solved, the effect of protecting the dummy bar head is achieved, and the service life of the dummy bar head is prolonged.
Optionally, nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed into the crystallizer and the dummy ingot head, the nail scraps are added according to 43-52 kg/m & lt 2 & gt according to different steel types of the casting blank, the nail scrap adding amount is quantized according to different steel types, and the added nail scrap amount is adaptively adjusted according to different steel types of the casting blank.
With respect to quantifying the amount of nail chips added, a gauge 200 may be employed to assist. Specifically, referring to fig. 1 and 5, the continuous casting method further includes: the measuring tool 200 is used for distributing nail scraps, specifically, nail scraps with the diameter of 10-15mm and the length of 10-15mm are distributed into a crystallizer and a dummy ingot head, the measuring tool 200 comprises a measuring cylinder 210 and a handle 220 connected with the measuring cylinder 210, and scales 230 and a transparent observation window 240 are arranged on the peripheral side of the measuring cylinder 210. The scale 230 is matched with the transparent observation window 240 to realize quantitative distribution of nail scraps.
Optionally, referring to fig. 1, after the nail chips with the diameter of 10-15mm and the length of 10-15mm are distributed in the crystallizer and on the dummy ingot head, the continuous casting method further comprises stacking cold materials on the nail chips, and the continuous casting machine has the casting starting condition after stacking. Specifically, cold charge is stacked on the nail chips, a layer of spiral cold charge can be stacked on the nail chips when aiming at the steel grade with poor liquidity, and a layer of grid cold charge and a layer of spiral cold charge can be sequentially stacked on the nail chips when aiming at the steel grade with good liquidity. The spiral cold material is generally only made into a spring shape, and the spiral cold material and the grid cold material can be made of plain carbon steel.
Optionally, the nail chips are distributed into the mold and onto the dummy bar head by using a distribution device 100, referring to fig. 2 to 4, the distribution device 100 includes a distribution frame 110 and an insert plate 120, the top and the bottom of the distribution frame 110 are open (not shown in the drawings), the transverse cross section of the inner cavity of the distribution frame 110 is the same as the maximum transverse cross section of the casting blank produced by the continuous casting method, the periphery of the distribution frame 110 is provided with an insertion hole (not shown in the drawings), the pore channel direction of the insertion hole is arranged along the transverse direction of the inner cavity, the insert plate 120 is movably mounted in the insertion hole of the distribution frame 110, the insert plate 120 can cover the transverse cross section of the inner cavity, the insert plate 120 is provided with a handheld portion 121, and the handheld portion 121 is used for assisting the insert plate 120 to enter and exit from the inner cavity of the distribution frame 110 along the insertion hole.
When the distributing device 100 is used, the inserting plate 120 is pushed into the distributing frame 110, and according to the situation of the section to be poured, required nail scraps are uniformly paved in the distributing frame 110 and on the inserting plate 120; the distributing device 100 moves in place, the inserting plate 120 is pulled out from the inserting hole through the handheld portion 121, and the nail chips on the inserting plate 120 fall into the crystallizer and the dummy bar head.
Optionally, referring to fig. 2, the handle 121 is disposed in a handle shape. The hand-held portion 121 may be formed by a slot formed in the side of the insert plate.
Alternatively, referring to fig. 2 and fig. 3, the material distributing device 100 includes two inserting plates 120, and two inserting holes are respectively formed on two opposite sides of the material distributing frame 110 along the peripheral side, which can be understood as a left inserting hole and a right inserting hole, the two inserting plates 120 are respectively movably mounted in the two inserting holes, and the two inserting plates 120 together cover the transverse cross section of the inner cavity when contacting. As described in the description of the two boards 120 contacting each other, particularly, the adjacent sides of the two boards 120 can be folded.
The above description has been made with the insert plate 120 covering the lateral cross section of the cavity, the covering including the lateral area of the insert plate 120 being larger than the lateral cross sectional area of the cavity, so as to smoothly mount the hand-held portion 121 outside the cloth frame 110.
The above description describes a transverse cross section of the cavity, the transverse direction of the cavity is the same direction as the cloth frame 110 compared to the longitudinal direction, and the connecting direction of the top and the bottom of the cloth frame 110 is the longitudinal direction.
It should be noted that, in order to uniformly distribute the nail scraps onto the dummy bar head through the distributing device 100, the inserting plate 120 needs to be strictly arranged in the transverse direction of the inner cavity of the distributing frame 110.
Alternatively, the transverse cross section of the inner cavity of the material distribution frame 110 is rectangular and is arranged corresponding to the shape of the end surface of the casting blank.
It should be noted that, after a layer of asbestos cloth is laid on the end face of the head of the dummy bar head, the staple scraps are distributed into the crystallizer and the dummy bar head by the distributing device 100, and the asbestos cloth is also beneficial to reducing the movement of the staple scraps and further improving the uniformity of the distribution.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A continuous casting method, characterized by comprising:
loading a dummy bar into a continuous casting machine, and conveying a dummy bar head of the dummy bar into a crystallizer of the continuous casting machine;
and after the dummy bar head of the dummy bar is sent into a crystallizer of the continuous casting machine, distributing nail scraps with the diameter of 10-15mm and the length of 10-15mm into the crystallizer and the dummy bar head.
2. The continuous casting method as claimed in claim 1, wherein the nail chips are distributed into the mold and onto the dummy bar head by a distribution device;
the distributing device comprises:
the top and the bottom of the distribution frame are arranged in an open manner, the transverse section of an inner cavity of the distribution frame is the same as the maximum transverse section of a casting blank produced by the continuous casting method, jacks are formed in the peripheral side of the distribution frame, and the pore passage direction of the jacks is arranged along the transverse direction of the inner cavity; and
the plug board is movably arranged in the jack of the material distribution frame, the plug board can cover the transverse section of the inner cavity, the plug board is provided with a handheld portion, and the handheld portion is used for assisting the plug board to enter and exit the inner cavity of the material distribution frame along the jack.
3. The continuous casting method as claimed in claim 2, wherein the hand-held portion is provided as a handle.
4. The continuous casting method according to claim 2, wherein the insertion holes are respectively formed in the cloth frame along one of opposite sides of the circumferential side, the cloth device includes two of the insert plates, the two insert plates are movably mounted in the two insertion holes, respectively, and the two insert plates cover the transverse section of the inner cavity together when they are in contact with each other.
5. The continuous casting method as claimed in claim 2, wherein the transverse section of the inner cavity of the cloth frame is disposed in a rectangular shape.
6. The continuous casting method as claimed in claim 1, wherein after said dummy bar head of said dummy bar is fed into a mold of said continuous casting machine and before said pin scrap having a diameter of 10-15mm and a length of 10-15mm is distributed into said mold and onto said dummy bar head, said continuous casting method further comprises:
and plugging a gap between the dummy bar head and the crystallizer by adopting refractory cotton or asbestos ropes.
7. The continuous casting method as claimed in claim 6, wherein after the gap between the dummy bar head and the mold is plugged with refractory cotton or asbestos cord and before the pin scrap having a diameter of 10-15mm and a length of 10-15mm is distributed into the mold and onto the dummy bar head, the continuous casting method further comprises:
and paving a layer of asbestos cloth or coating a layer of protective paint on the end face of the head of the dummy bar head.
8. The continuous casting method according to claim 1, wherein the distribution of the chips having a diameter of 10-15mm and a length of 10-15mm into the mold and onto the dummy head comprises the distribution of the chips in an amount of 43-52 kg/m according to different steel grades of the cast strand 2 Adding the mixture.
9. The continuous casting method according to claim 8, further comprising:
adopt the measuring tool to carry out the cloth of nail bits, the measuring tool include the graduated flask, with the handle that the graduated flask is connected, the graduated flask is provided with scale and transparent observation window in week side department.
10. The continuous casting method according to any one of claims 1 to 8, wherein after the distribution of the pin scrap having a diameter of 10 to 15mm and a length of 10 to 15mm into the mold and onto the dummy head, the continuous casting method further comprises:
and stacking a layer of spiral cold material on the nail chips or stacking a layer of grid cold material and a layer of spiral cold material in sequence, wherein the continuous casting machine has a casting starting condition after stacking is finished.
CN202211005780.XA 2022-08-22 2022-08-22 Continuous casting method Active CN115283630B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101745621A (en) * 2008-12-12 2010-06-23 鞍钢股份有限公司 Method for plugging dummy bar head of slab caster
JP2010172914A (en) * 2009-01-28 2010-08-12 Jfe Steel Corp Partition cold material and continuous casting method
CN101890487A (en) * 2010-07-10 2010-11-24 山西太钢不锈钢股份有限公司 Method for plugging dummy bar head
CN105014028A (en) * 2015-08-14 2015-11-04 武钢集团昆明钢铁股份有限公司 Cold burden laying method and casting starting technology of sizing nozzle open type continuous casting billets
CN205056973U (en) * 2015-10-14 2016-03-02 新疆八一钢铁股份有限公司 With cooperate fabric construction of continuous slab casting dummy ingot head of crystallizer
CN108339954A (en) * 2018-02-11 2018-07-31 福建三钢闽光股份有限公司 It is a kind of improving continuous casting and open the cold burden of gravy with meat or vegetables poured over rice or noodles base condensation rate and intensity lay method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101745621A (en) * 2008-12-12 2010-06-23 鞍钢股份有限公司 Method for plugging dummy bar head of slab caster
JP2010172914A (en) * 2009-01-28 2010-08-12 Jfe Steel Corp Partition cold material and continuous casting method
CN101890487A (en) * 2010-07-10 2010-11-24 山西太钢不锈钢股份有限公司 Method for plugging dummy bar head
CN105014028A (en) * 2015-08-14 2015-11-04 武钢集团昆明钢铁股份有限公司 Cold burden laying method and casting starting technology of sizing nozzle open type continuous casting billets
CN205056973U (en) * 2015-10-14 2016-03-02 新疆八一钢铁股份有限公司 With cooperate fabric construction of continuous slab casting dummy ingot head of crystallizer
CN108339954A (en) * 2018-02-11 2018-07-31 福建三钢闽光股份有限公司 It is a kind of improving continuous casting and open the cold burden of gravy with meat or vegetables poured over rice or noodles base condensation rate and intensity lay method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
冯捷，贾艳, 冶金工业出版社 *

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