CN115194111B - Semi-continuous casting vertical casting process and equipment for large round billets to extra-large round billets - Google Patents
Semi-continuous casting vertical casting process and equipment for large round billets to extra-large round billets Download PDFInfo
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- CN115194111B CN115194111B CN202210864577.1A CN202210864577A CN115194111B CN 115194111 B CN115194111 B CN 115194111B CN 202210864577 A CN202210864577 A CN 202210864577A CN 115194111 B CN115194111 B CN 115194111B
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- 238000005266 casting Methods 0.000 title claims abstract description 83
- 238000009749 continuous casting Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 238000003756 stirring Methods 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000007711 solidification Methods 0.000 claims abstract description 14
- 230000008023 solidification Effects 0.000 claims abstract description 14
- 210000001787 dendrite Anatomy 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000002401 inhibitory effect Effects 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 3
- 239000007790 solid phase Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 14
- 238000005452 bending Methods 0.000 abstract description 6
- 238000002425 crystallisation Methods 0.000 abstract description 5
- 230000008025 crystallization Effects 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000007667 floating Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000009827 uniform distribution Methods 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 238000005242 forging Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 238000004512 die casting Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000005303 weighing 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/14—Plants for continuous casting
- B22D11/141—Plants for continuous casting for vertical casting
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/053—Means for oscillating 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling 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
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
-
- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields
-
- 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
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/124—Accessories for subsequent treating or working cast stock in situ for cooling
-
- 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
- B22D11/16—Controlling or regulating processes or operations
-
- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/166—Controlling or regulating processes or operations for mould oscillation
-
- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
-
- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a semi-continuous casting vertical casting process and equipment from a large round billet to an extra large round billet, and mainly relates to the field of metal smelting; the crystallization and solidification processes of molten steel in the vertical casting process are completed on the same vertical line, so that floating removal of nonmetallic inclusion in the molten steel and uniform distribution in a casting blank are facilitated; the geometrical symmetry performance of the casting blank solidification and heat exchange process is good, and the cooling of the casting blank is very uniform; in the whole crystallization solidification process, no external mechanical stress is applied, the casting blank is not subjected to any bending force and straightening force, bending strain and straightening strain are avoided, and the method is more suitable for casting steel with high crack sensitivity, high quality requirement and special purpose; the surface quality and the internal quality of the casting blank all meet higher standard requirements through controlling the pulling speed of each section, the primary cooling parameter, the secondary cooling parameter, the vibration parameter, the electromagnetic stirring parameter of the crystallizer and the dynamic electromagnetic stirring parameter and applying the blank tail heating and feeding technology.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a semi-continuous casting vertical casting process and equipment for large round billets to extra-large round billets.
Background
The large forging can be used as a blank manufactured by heavy complete equipment, and can also be directly applied to heavy engineering projects in a finished product form. The large forging is mainly applied to the industries of electric power, ships, heavy machinery, metallurgy, petrochemical industry and national defense. The traditional large forgings are manufactured by adopting a die casting process, and have the problems of unstable quality, low metal yield, high production cost and the like.
In the whole crystallization solidification process of the arc continuous casting machine in the prior art, a casting blank can be subjected to bending force and straightening force to generate bending strain and straightening strain, so that the arc continuous casting machine is not beneficial to casting of steel types with high crack sensitivity and high quality requirements.
Disclosure of Invention
Based on the problems, the invention aims to provide a large round billet to extra large round billet semi-continuous casting vertical casting process and equipment, and the invention adopts the following technical scheme:
the invention provides a semi-continuous casting vertical casting process from a large round billet to an extra-large round billet, which comprises the following steps:
the superheat degree of molten steel in the ladle is controlled at 25 ℃; after molten steel enters the crystallizer, the vibration device drives the crystallizer to vibrate together according to a non-sinusoidal vibration model, and meanwhile, cooling water and an electromagnetic stirring device on the crystallizer continuously cool and electromagnetically stir the molten steel for one time; wherein, the water flow rate of the cooling water on the crystallizer for primary cooling of the molten steel is controlled to be 5 m/s-8 m/s; the negative sliding time controlled by the non-sinusoidal vibration model is 0.15 to 0.31 seconds;
the casting blank lifting vehicle descends with a dummy ingot steel drawing device, and the casting blank with a certain blank shell thickness is drawn out of the crystallizer and then sprayed with water to be cooled by a spraying device in a secondary cooling area; wherein the specific water quantity of the spray device in the secondary cooling area is 0.05-0.1L/kg; the blank pulling speed of the blank lifting vehicle is controlled to be 0.05-0.50 m/min;
as the casting blank is continuously solidified and pulled out by the dummy ingot steel pulling device, the dynamic electromagnetic stirring device is used for inhibiting dendrite growth of the casting blank and tracking the solidification tail end of the casting blank; wherein, the conditions of the dynamic electromagnetic stirring device for inhibiting dendrite growth are as follows: The condition for starting tracking of the dynamic electromagnetic stirring device is that the central solid phase rate is 0.06-0.67;
the casting blank is in a specified length, the tail blank heating and feeding device clamps the tail part of the casting blank, electroslag is added into the tail part of the casting blank, and the feeding and heating device starts to heat, perform thermal state feeding and capping;
After the completion of the shrinkage, the billet discharging trolley is driven to a billet discharging position, the casting blank lifting trolley drives the billets to descend, the dummy bar head falls onto the billet discharging trolley, the dummy bar head and the dummy bar are separated, the billet discharging trolley clamps the billets, and the billets are discharged along with the billet discharging trolley.
Preferably, the pull rate VC of the non-sinusoidal vibration model: 0.06 m-0.085 m/min, vibration frequency f:75c/min, amplitude h:2mm, non-sinusoidal rate R:20%.
Preferably, the current of the electromagnetic stirring device on the crystallizer: 400-500A, stirring frequency: 0.8-1.2 Hz.
Preferably, the model of the dynamic electromagnetic stirring device for inhibiting dendrite growth is as follows:
L＝at2+bt+c；
Wherein: l is the position of a casting blank, t is time, and a, b and c are coefficients;
| a | b | c | |
| dendrite length of 12mm | 114 | -697.99 | 1579.3 |
| Dendrite length of 20mm | 41.042 | -418.79 | 1579.3 |
| Dendrite length of 50mm | 6.5667 | -167.52 | 1579.3 |
Preferably, the dynamic electromagnetic stirring device tracks the solidification end model of the casting blank as follows:
L＝at6+bt5+ct4+dt3+et2+ft+g
wherein L is the position of a casting blank, t is time, a, b, c, d, e, f, g is a coefficient;
preferably, the speed of the casting blank lifting vehicle is precisely controlled by a servo motor or a hydraulic motor.
The invention also provides a semi-continuous casting vertical casting device for large round billets to extra large round billets, which comprises a tundish and a tundish carrying device, a crystallizer electromagnetic stirring device, a secondary cooling area spraying device, a vibrating device, a dynamic electromagnetic stirring trolley, a dummy bar, a dummy ingot drawing trolley, a guiding device, a guiding column, a heat insulation cover, a billet discharging trolley and a billet tail heating feeding device which are arranged on a production line.
Compared with the prior art, the invention has the beneficial technical effects that:
The invention can provide high-quality blanks (replacing traditional die casting process products) for the subsequent manufacture of large forgings, improve the product quality of the large forgings and the utilization rate of materials, and reduce the energy consumption; the crystallization and solidification processes of molten steel in the vertical casting process are completed on the same vertical line, so that floating removal of nonmetallic inclusion in the molten steel and uniform distribution in a casting blank are facilitated; the geometrical symmetry performance of the casting blank solidification and heat exchange process is good, and the cooling of the casting blank is very uniform; in the whole crystallization solidification process, no external mechanical stress is applied, the casting blank is not subjected to any bending force and straightening force, bending strain and straightening strain are avoided, and the method is more suitable for casting steel with high crack sensitivity, high quality requirement and special purpose; the surface quality and the internal quality of the manufactured casting blank all meet higher standard requirements through controlling the pulling speed of each section, primary cooling parameters, secondary cooling parameters, vibration parameters, electromagnetic stirring parameters of a crystallizer and dynamic electromagnetic stirring parameters and applying a blank tail heating and feeding technology.
Drawings
The invention is further described with reference to the following description of the drawings.
FIG. 1 is a process flow diagram of an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1, in this embodiment, a semi-continuous casting vertical casting process from a large round billet to an extra large round billet is disclosed, which includes a casting preparation stage and a casting and solidification stage. The diameter of the large round billet in this embodiment isThe diameter of the oversized round billet is/>
Casting preparation: the casting blank lifting vehicle brings a dummy ingot steel pulling device into the bottom of the crystallizer, a ladle lifted by the travelling crane falls onto a ladle turret at a receiving position, the ladle turret is rotated to a casting position, and a tundish after baking is moved to the casting position through a tundish carrying device.
Casting and solidifying: the ladle carrying device conveys the ladle to a pouring position, a water gap is opened to start molten steel discharging, a ladle weighing device monitors the weight of the molten steel in real time, the residual steel slag of the ladle is prevented from flowing into a tundish, the molten steel in the tundish is polluted, and the superheat degree of the molten steel in the ladle is controlled at 25 ℃. Molten steel in the ladle flows into the tundish through the long nozzle, molten steel in the tundish flows into the crystallizer through the invasive nozzle, and the long nozzle and the immersed nozzle are used for realizing protection casting and preventing the molten steel from being oxidized.
The molten steel in the tundish flows into the crystallizer, and the crystallizer is provided with liquid level detection, so that the liquid level of the crystallizer is ensured not to fluctuate too much, and the quality of the steel billet is affected. Secondly, in order to prevent steel leakage, the molten steel surface is too fast to be increased and overflows the crystallizer, after the liquid level is detected, the liquid level can be fed back to a computer, the flow of the submerged nozzle is regulated, and steel leakage is prevented.
After molten steel enters the crystallizer, the vibration device drives the crystallizer to vibrate together according to a non-sinusoidal vibration model, and meanwhile, cooling water and an electromagnetic stirring device on the crystallizer continuously cool and electromagnetically stir the molten steel for one time; wherein, the water flow rate of the cooling water on the crystallizer for primary cooling of the molten steel is controlled to be 5 m/s-8 m/s; the negative sliding time controlled by the non-sinusoidal vibration model is 0.15 to 0.31 seconds;
The casting blank lifting vehicle descends with a dummy ingot steel drawing device, and the casting blank with a certain blank shell thickness is drawn out of the crystallizer and then sprayed with water to be cooled by a spraying device in a secondary cooling area; wherein the specific water quantity of the spray device in the secondary cooling area is 0.05-0.1L/kg; the blank pulling speed of the blank lifting vehicle is controlled to be 0.05-0.50 m/min, and the blank lifting vehicle speed is precisely controlled by a servo motor or a hydraulic motor.
As the casting blank is continuously solidified and pulled out by the dummy ingot steel pulling device, the dynamic electromagnetic stirring device is used for inhibiting dendrite growth of the casting blank and tracking the solidification tail end of the casting blank; wherein, the conditions of the dynamic electromagnetic stirring device for inhibiting dendrite growth are as follows: the condition for starting tracking of the dynamic electromagnetic stirring device is that the central solid phase rate is 0.06-0.67.
And when the casting blank reaches the specified length, the tail blank heating and feeding device clamps the tail part of the casting blank, electroslag is added into the tail blank, and the feeding and heating device starts to heat, and carries out thermal feeding and capping.
After the completion of the shrinkage, the billet discharging trolley is driven to a billet discharging position, the casting blank lifting trolley drives the billets to descend, the dummy bar head falls onto the billet discharging trolley, the dummy bar head and the dummy bar are separated, the billet discharging trolley clamps the billets, and the billets are discharged along with the billet discharging trolley.
In the present embodiment, the pull rate VC of the non-sinusoidal vibration model: 0.06 m-0.085 m/min, vibration frequency f:75c/min, amplitude h:2mm, non-sinusoidal rate R:20%.
In this example, the current of the electromagnetic stirring device on the crystallizer: 400-500A, stirring frequency: 0.8-1.2 Hz.
In this embodiment, the model of the dynamic electromagnetic stirring device for inhibiting dendrite growth is:
L＝at2+bt+c
Wherein: l is the position of a casting blank, t is time, and a, b and c are coefficients;
| a | b | c | |
| dendrite length of 12mm | 114 | -697.99 | 1579.3 |
| Dendrite length of 20mm | 41.042 | -418.79 | 1579.3 |
| Dendrite length of 50mm | 6.5667 | -167.52 | 1579.3 |
In this embodiment, the dynamic electromagnetic stirring device tracks the solidification end model of the casting blank as follows:
L＝at6+bt5+ct4+dt3+et2+ft+g
wherein L is the position of a casting blank, t is time, a, b, c, d, e, f, g is a coefficient;
In the embodiment, the blank tail electroslag heating feeding is a process of heating a tail blank of a casting blank, performing thermal feeding and capping; and stopping pouring the steel ladle and the middle ladle molten steel when the casting blank reaches the specified length, compensating the molten steel to a compensating position when the casting blank lifting vehicle drives the casting blank to ascend, clamping the tail part of the casting blank by the compensating device, adding electroslag, and starting heating by the compensating heating device. Parameters such as current, voltage and the like are controlled by using an electroslag heating feeding model and are shown in the following table.
Slag formation control:
| Secondary voltage, V | Time, minutes | Current, A |
| 70 | 3 | 5000 |
| 70 | 4 | 6000 |
| 70 | 5 | 7000 |
| 10000 |
Heating and feeding control:
| Secondary voltage, V | Current, A | Time, minutes |
| 80 | 10000 | 1 |
| 80 | 9500 | 6 |
| 80 | 8000 | 11 |
| 6000 | 150 |
Electroslag heating and feeding are divided into two processes: the electroslag melting is performed first, and then the molten steel is heated. When melting, slag forming control parameters are adopted, and heating and feeding control parameters are adopted for heating molten steel.
The embodiment also provides a semi-continuous casting vertical casting device from large round billets to extra large round billets, which comprises a tundish and a tundish carrying device, a crystallizer, an electromagnetic stirring device of the crystallizer, a spraying device of a secondary cooling area, a vibrating device, a dynamic electromagnetic stirring trolley, a dummy bar, a dummy ingot drawing trolley, a guiding device, a guiding column, a heat insulation cover, a billet discharging trolley and a billet tail heating feeding device which are arranged on a production line.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (6)
1. The semi-continuous casting vertical casting process from large round billet to extra large round billet is characterized by comprising the following steps:
The superheat degree of molten steel in the ladle is controlled at 25 ℃; after molten steel enters the crystallizer, the vibration device drives the crystallizer to vibrate together according to a non-sinusoidal vibration model, and meanwhile, cooling water and an electromagnetic stirring device on the crystallizer continuously cool and electromagnetically stir the molten steel for one time; wherein, the water flow rate of the cooling water on the crystallizer for primary cooling of the molten steel is controlled to be 5 m/s-8 m/s; the negative sliding time controlled by the non-sinusoidal vibration model is 0.15 to 0.31 seconds;
The casting blank lifting vehicle descends with a dummy ingot steel drawing device, and the casting blank with a certain blank shell thickness is drawn out of the crystallizer and then sprayed with water to be cooled by a spraying device in a secondary cooling area; wherein the specific water quantity of the spray device in the secondary cooling area is 0.05-0.1L/kg; the blank pulling speed of the blank lifting vehicle is controlled to be 0.05-0.50 m/min;
as the casting blank is continuously solidified and pulled out by the dummy ingot steel pulling device, the dynamic electromagnetic stirring device is used for inhibiting dendrite growth of the casting blank and tracking the solidification tail end of the casting blank; wherein, the conditions of the dynamic electromagnetic stirring device for inhibiting dendrite growth are as follows: ; the condition for starting tracking of the dynamic electromagnetic stirring device is that the central solid phase rate is 0.06-0.67;
The casting blank is in a specified length, the tail blank heating and feeding device clamps the tail part of the casting blank, electroslag is added into the tail blank, and the tail blank heating and feeding device starts to heat, perform thermal state feeding and capping;
After the completion of the shrinkage, the blank discharging trolley is driven to a blank discharging position, the blank lifting trolley drives the blank to descend, the dummy bar head falls onto the blank discharging trolley, the dummy bar head and the dummy bar are separated, the blank discharging trolley clamps the blank, and the blank is discharged along with the blank discharging trolley;
the semi-continuous casting vertical casting process from the large round billet to the extra large round billet is realized through semi-continuous casting vertical casting equipment, wherein the semi-continuous casting vertical casting equipment comprises a tundish and a tundish carrying equipment arranged on a production line, a crystallizer, an electromagnetic stirring device on the crystallizer, a secondary cooling zone spraying device, a vibrating device, a dynamic electromagnetic stirring trolley, a dummy bar, a casting blank lifting trolley, a guiding device, a guiding column, a heat insulation cover, a blank ejection trolley and a tail billet heating and feeding device.
2. The round bloom-to-extra round bloom semi-continuous casting vertical casting process as claimed in claim 1, wherein: pull rate VC of non-sinusoidal vibration model: 0.06 m-0.085 m/min, vibration frequency f:75c/min, amplitude h:2mm, non-sinusoidal rate R:20%.
3. The round bloom-to-extra round bloom semi-continuous casting vertical casting process as claimed in claim 1, wherein: current of electromagnetic stirring device on crystallizer: 400-500A, stirring frequency: 0.8-1.2 Hz.
4. The round bloom-to-extra round bloom semi-continuous casting vertical casting process as claimed in claim 1, wherein: the model for inhibiting dendrite growth by the dynamic electromagnetic stirring device is as follows:
；
Wherein: l is the position of a casting blank, t is time, and a, b and c are coefficients;
。
5. The round bloom-to-extra round bloom semi-continuous casting vertical casting process as claimed in claim 1, wherein: the dynamic electromagnetic stirring device tracks the solidification tail end model of the casting blank as follows:
；
wherein L is the position of a casting blank, t is time, a, b, c, d, e, f, g is a coefficient;
。
6. The round bloom-to-extra round bloom semi-continuous casting vertical casting process as claimed in claim 1, wherein: the speed of the casting blank lifting vehicle is precisely controlled by a servo motor or a hydraulic motor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210864577.1A CN115194111B (en) | 2022-07-21 | 2022-07-21 | Semi-continuous casting vertical casting process and equipment for large round billets to extra-large round billets |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210864577.1A CN115194111B (en) | 2022-07-21 | 2022-07-21 | Semi-continuous casting vertical casting process and equipment for large round billets to extra-large round billets |
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| CN115194111B true CN115194111B (en) | 2024-04-30 |
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Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6192758A (en) * | 1980-07-02 | 1986-05-10 | 昭和電線電纜株式会社 | Long-sized metallic product |
| JPH08260083A (en) * | 1995-03-17 | 1996-10-08 | Santoku Kinzoku Kogyo Kk | Sm-co permanent magnet material, permanent magnet and production thereof |
| JP2000246407A (en) * | 1999-02-24 | 2000-09-12 | Nippon Steel Corp | Steel slab having little non-metallic inclusion |
| CN101433948A (en) * | 2008-12-17 | 2009-05-20 | 马钢设计研究院有限责任公司 | Round billet continuous casting machine with especially big sectional plane |
| CN101602096A (en) * | 2009-07-28 | 2009-12-16 | 武汉大西洋连铸设备工程有限责任公司 | Moveable casting blank solidification end electromagnetic stirring device |
| CN201586733U (en) * | 2009-12-16 | 2010-09-22 | 鞍钢重型机械有限责任公司 | Large cross-section blank casting machine |
| CN102307685A (en) * | 2009-02-09 | 2012-01-04 | 新日本制铁株式会社 | Titanium slab for hot rolling, and method of producing and method of rolling the same |
| WO2016131437A2 (en) * | 2015-02-19 | 2016-08-25 | Pes Consulting Zajber E.K. | Method and installation for producing steel strands |
| KR20160105428A (en) * | 2013-12-30 | 2016-09-06 | 인테코 스페셜 멜팅 테크놀로지스 게엠베하 | Method and plant for the production of long ingots having a large cross-section |
| CN106312000A (en) * | 2016-10-12 | 2017-01-11 | 中原特钢股份有限公司 | 18CrNiMo7-6 round billet continuous casting method for vertical type continuous casting production gear steel |
| WO2018172358A1 (en) * | 2017-03-21 | 2018-09-27 | Primetals Technologies Austria GmbH | Installation and method for the semi-continuous casting of slabs |
| CN110666115A (en) * | 2019-11-04 | 2020-01-10 | 中冶京诚工程技术有限公司 | Crystallizer and vertical hollow round billet continuous casting machine |
| CN113426970A (en) * | 2021-06-11 | 2021-09-24 | 一重集团大连工程技术有限公司 | Vertical semi-continuous production device and production process of large round billets with phi of 1000 mm-2000 mm |
| CN113569400A (en) * | 2021-07-20 | 2021-10-29 | 一重集团大连工程技术有限公司 | Method for determining electromagnetic stirring dynamic position of vertical semi-continuous casting round billet solidification tail end |
| CN114653912A (en) * | 2022-02-14 | 2022-06-24 | 江阴兴澄特种钢铁有限公司 | Method for producing large-diameter high-purity compact special steel continuous casting round billet |
-
2022
- 2022-07-21 CN CN202210864577.1A patent/CN115194111B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6192758A (en) * | 1980-07-02 | 1986-05-10 | 昭和電線電纜株式会社 | Long-sized metallic product |
| JPH08260083A (en) * | 1995-03-17 | 1996-10-08 | Santoku Kinzoku Kogyo Kk | Sm-co permanent magnet material, permanent magnet and production thereof |
| JP2000246407A (en) * | 1999-02-24 | 2000-09-12 | Nippon Steel Corp | Steel slab having little non-metallic inclusion |
| CN101433948A (en) * | 2008-12-17 | 2009-05-20 | 马钢设计研究院有限责任公司 | Round billet continuous casting machine with especially big sectional plane |
| CN102307685A (en) * | 2009-02-09 | 2012-01-04 | 新日本制铁株式会社 | Titanium slab for hot rolling, and method of producing and method of rolling the same |
| CN101602096A (en) * | 2009-07-28 | 2009-12-16 | 武汉大西洋连铸设备工程有限责任公司 | Moveable casting blank solidification end electromagnetic stirring device |
| CN201586733U (en) * | 2009-12-16 | 2010-09-22 | 鞍钢重型机械有限责任公司 | Large cross-section blank casting machine |
| KR20160105428A (en) * | 2013-12-30 | 2016-09-06 | 인테코 스페셜 멜팅 테크놀로지스 게엠베하 | Method and plant for the production of long ingots having a large cross-section |
| WO2016131437A2 (en) * | 2015-02-19 | 2016-08-25 | Pes Consulting Zajber E.K. | Method and installation for producing steel strands |
| CN106312000A (en) * | 2016-10-12 | 2017-01-11 | 中原特钢股份有限公司 | 18CrNiMo7-6 round billet continuous casting method for vertical type continuous casting production gear steel |
| WO2018172358A1 (en) * | 2017-03-21 | 2018-09-27 | Primetals Technologies Austria GmbH | Installation and method for the semi-continuous casting of slabs |
| CN110666115A (en) * | 2019-11-04 | 2020-01-10 | 中冶京诚工程技术有限公司 | Crystallizer and vertical hollow round billet continuous casting machine |
| CN113426970A (en) * | 2021-06-11 | 2021-09-24 | 一重集团大连工程技术有限公司 | Vertical semi-continuous production device and production process of large round billets with phi of 1000 mm-2000 mm |
| CN113569400A (en) * | 2021-07-20 | 2021-10-29 | 一重集团大连工程技术有限公司 | Method for determining electromagnetic stirring dynamic position of vertical semi-continuous casting round billet solidification tail end |
| CN114653912A (en) * | 2022-02-14 | 2022-06-24 | 江阴兴澄特种钢铁有限公司 | Method for producing large-diameter high-purity compact special steel continuous casting round billet |
Non-Patent Citations (3)
| Title |
|---|
| 淮钢特殊钢大型圆坯连铸工艺装备特点及实践;王忠英;仝太钦;刘兆方;孙志祥;叶梅珍;;特殊钢(第04期);22-25 * |
| 特钢Φ800mm特大圆坯连铸机的新技术;阎建武;李万国;;钢铁技术(第03期);2-7 * |
| 电磁搅拌对A356合金熔体结构及其凝固行为的影响;王晶;李培杰;何良菊;弭光宝;钟约先;;中国有色金属学报(第12期);2090-2098 * |
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