CN118543795B - Control method for molten metal magnetic suspension continuous casting on-line processing production line - Google Patents
Control method for molten metal magnetic suspension continuous casting on-line processing production line Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 title claims abstract description 145
- 239000002184 metal Substances 0.000 title claims abstract description 145
- 239000000725 suspension Substances 0.000 title claims abstract description 88
- 238000012545 processing Methods 0.000 title claims abstract description 64
- 238000009749 continuous casting Methods 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005516 engineering process Methods 0.000 claims abstract description 81
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 230000006698 induction Effects 0.000 claims abstract description 54
- 238000005266 casting Methods 0.000 claims abstract description 40
- 238000005339 levitation Methods 0.000 claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 239000002918 waste heat Substances 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims description 50
- 239000003595 mist Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000012546 transfer Methods 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 13
- 239000007790 solid phase Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 9
- 230000000452 restraining effect Effects 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 6
- 230000005674 electromagnetic induction Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 claims description 6
- 238000013178 mathematical model Methods 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 9
- 239000000498 cooling water Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000010814 metallic waste Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The invention relates to the technical field of metal metallurgy, in particular to a control method of a molten metal magnetic suspension continuous casting on-line processing production line. It comprises a magnetic levitation transportation unit which adopts an alternating magnetic field to suspend the conveying technology realizes the suspension and conveying of the high-temperature metal liquid; the continuous casting unit is used for continuously casting the metal liquid into a rectangular waste heat casting blank and preparing continuous hot processing; the online processing unit uses a waste heat casting blank continuous thermal processing technology to continuously convey the molten metal to a thermal processing machine for processing; the control system unit adopts an intelligent magnetic induction and thermal control integrated technology to ensure the stable suspension and movement of the molten metal and maintain the temperature of the molten metal; the monitoring feedback unit monitors and records parameters in the production process in real time and feeds data back to the control system unit. The control method of the metal liquid magnetic suspension continuous casting on-line processing production line realizes efficient and stable suspension, continuous transportation and temperature optimization control of the metal liquid by adopting an alternating magnetic field suspension transportation and intelligent magnetic induction and thermal control integrated technology.
Description
Technical Field
The invention relates to the technical field of metal metallurgy, in particular to a control method of a molten metal magnetic suspension continuous casting on-line processing production line.
Background
The control system of the metal liquid magnetic suspension continuous casting on-line processing production line adopts an alternating magnetic field suspension conveying technology to realize non-contact suspension and continuous conveying of the metal liquid, reduces the use of a crystallizer and cooling water, improves the production efficiency and the energy-saving effect, avoids the problems of secondary heating and illegal direct rolling, and reduces the energy consumption and the production cost
In the existing continuous casting online processing production technology, the failure of breaking caused by insufficient strength of a casting blank shell can occur under the condition of too high casting blank speed or too high casting blank temperature, and the problems of excessive molten metal waste heat dissipation, secondary heating, low production efficiency and quality are caused due to the use of a crystallizer and high-pressure cooling water in the continuous casting online processing production process, so that the control method of the molten metal magnetic suspension continuous casting online processing production line is designed.
Disclosure of Invention
The invention aims to provide a control method of a molten metal magnetic suspension continuous casting on-line processing production line, which aims to solve the problems that in the background art, due to the fact that a crystallizer and high-pressure cooling water are needed in the continuous casting on-line processing production process, excessive molten metal waste heat dissipation is caused, secondary heating is needed, production efficiency is low and quality is improved.
In order to achieve the above purpose, the present invention provides a method for controlling an online processing line for magnetic suspension continuous casting of molten metal, comprising:
the magnetic levitation transportation unit adopts an alternating magnetic field levitation transportation technology to realize levitation and transportation of high-temperature metal liquid;
the continuous casting unit is used for continuously casting the metal liquid into a rectangular waste heat casting blank, maintaining the optimal hot working temperature and preparing continuous hot working;
The online processing unit continuously conveys the molten metal to a thermal processing machine by using a waste heat casting blank continuous thermal processing technology for processing;
the control system unit adopts an intelligent magnetic induction and thermal control integrated technology to ensure stable suspension and movement of the molten metal and maintain the temperature of the molten metal;
And the monitoring feedback unit is used for monitoring and recording parameters in the production process in real time and feeding data back to the control system unit.
As a further improvement of the technical scheme, the magnetic levitation transportation unit comprises an alternating magnetic field module, a magnetic levitation module, a temperature regulation module and a continuous conveying module;
The alternating magnetic field module utilizes alternating current and a magnetizer, and embeds the magnetizer into a groove of the magnetizer to form a uniform and continuous alternating magnetic field and act on molten metal;
The magnetic levitation suspension module adopts a magnetic levitation technology to form an upward-radiating alternating magnetic field through an air-core transformer principle, and the magnetic induction intensity of the alternating magnetic field is upward radiated onto molten metal through a magnetizer opened by a magnetic circuit, so that the molten metal is repelled and suspended by induction;
The temperature regulation and control module utilizes a water mist spraying system to cool the molten metal so as to change the molten metal from a liquid phase to a solid phase;
The continuous conveying module utilizes an alternating magnetic field to realize continuous and stable conveying of molten metal;
The magnetic suspension technology is a technology for realizing object suspension by utilizing magnetic force, and is based on non-contact thrust or suspension force generated by a magnetic field on charged or magnetic substances, and in the metal liquid magnetic suspension continuous casting process, the magnetic suspension technology utilizes repulsion or attraction of the magnetic field to counteract the gravity of the metal liquid, so that the metal liquid is kept in a suspension state under the condition of no physical support.
The air-core transformer principle relates to the phenomenon that induced current is generated around a conductor by utilizing the change of a magnetic field in a magnetic suspension module, the design of the air-core transformer can be used for generating a uniform and continuous magnetic field, and the magnetic field layout can be more efficient through current control and is suitable for generating a large-range uniform magnetic field in a smaller space, so that stable suspension of molten metal is realized.
As a further improvement of the technical scheme, the alternating magnetic field suspension conveying technology is realized based on an electromagnetic induction technology and a magnetic suspension technology, is used for realizing non-contact suspension and continuous conveying of high-temperature metal liquid, realizes that a conductor and a magnetizer form a uniform alternating magnetic field, repels the metal liquid to suspend the metal liquid, regulates and controls the temperature of the metal liquid through a heat transfer mechanism, and finally enables the metal liquid to continuously move to a hot working machine, and the specific steps involved in the suspension and conveying of the high-temperature metal liquid by the alternating magnetic field suspension conveying technology are as follows:
S1.1, alternating supply frequency AndCurrent, generating alternating magnetic field：
；
Wherein, ；Is vacuum permeability; is the number of turns of the coil, Is the maximum current intensity of the alternating current;
S1.2 using an alternating magnetic field Generating magnetic levitation forceSo that the metal liquid is suspended:
；
Wherein, Is the maximum magnetic field strength of the alternating magnetic field; Is the volume of the metal liquid; Is vacuum magnetic permeability; Is the square of a sine function, and represents the time of the alternating magnetic field Intensity distribution of (2);； Representation pair Partial derivative of direction;
S1.3, spraying water mist on the suspended metal liquid to cool the metal liquid from a liquid phase to a solid phase
S1.4, utilizing magnetic buoyancyCalculating the molten metal conveying speed through a Navie-Stokes equation:
；
Wherein the said Is the density of the fluid; is the rate of change of velocity over time, i.e., the acceleration of the fluid; To be in the direction of Is fixed on the base; Is magnetic; Is a pressure gradient; Is the dynamic viscosity coefficient; Is the laplace operator of the velocity field.
As a further improvement of the technical scheme, the continuous casting unit comprises a suspension restraint module and a rapid cooling module;
The suspension constraint module uses a rectangular casting blank suspension constraint technology to ensure that the molten metal keeps a rectangular shape in a suspension state;
The rapid cooling module adopts a water mist spray cooling technology, rapidly cools the molten metal to a solid phase through a water mist spray system, and rapidly enters a hot working machine.
As a further improvement of the technical scheme, the rectangular casting blank suspension constraint technology is realized based on an electromagnetic induction technology, and provides repulsive forceSuspending the molten metal and applying lateral restraining forcesThe rectangular shape is maintained, and a mathematical model formula related to a rectangular casting blank suspension constraint technology is as follows:
Repulsive force ：；
Side restraining force：；
Wherein, Is time ofRepulsive force at the moment; Is the maximum magnetic field strength of the alternating magnetic field; Is the volume of the metal liquid; Is vacuum magnetic permeability; Is the square of a sine function, and represents the time of the alternating magnetic field Intensity distribution of (2);； Is a side restraining force; the magnetic field intensity of the side alternating magnetic field; Is the acting area of the side alternating magnetic field.
As a further improvement of the technical scheme, the water mist spray cooling technology is realized based on the heat transfer and cooling technology, so that a solid-phase thin shell is formed rapidly by molten metal to wait for processing, and a mathematical model formula related to the water mist spray cooling technology is as follows:
Spray cooling heat transfer formula: ；
Wherein, Is the heat flux density; Is the heat transfer coefficient; is the surface area of the cooling zone; The surface temperature of the molten metal is; Is ambient temperature.
As a further improvement of the technical scheme, the online processing unit comprises a waste heat casting blank transmission module and a hot processing module;
The waste heat casting blank continuous conveyor is used for continuously conveying the waste heat casting blank from the magnetic suspension area to the hot processing machinery;
The molten metal flows into the groove of the traction head and simultaneously must be sprayed with cooling liquid or cooling mist to enable the upper plane and the lower plane or the periphery of the molten metal to generate thin shells to bear traction, the traction system drags the molten metal into an alternating magnetic field, and the molten metal is moderately cooled into a residual heat casting blank with the optimal hot working temperature and immediately enters a hot working machine;
the hot processing module uses electromagnetic stirring and rapid cooling combination technology to perform rapid hot processing by utilizing waste heat to form materials and clean and refined parisons, and the mathematical formula related to the electromagnetic stirring and rapid cooling combination technology is as follows:
electromagnetic stirring force ：；
And (3) a casting blank cooling formula:；
Wherein the said Is electromagnetic stirring force; Is conductivity; is a velocity field; is the magnetic field strength; Is the cooling amount per unit time; Is the cooling heat transfer coefficient; For cooling the area surface; Is the temperature of the cooling medium;
The molten metal magnetic suspension continuous casting waste heat blank and the online hot processing production line can lead various molten metals such as steel, copper, aluminum and the like to be online into materials or net refined blanks, and the cross section shapes of products are various and can be achieved through the relevant hot processing of two casting blanks of plane shape and rectangle shape.
As a further improvement of the technical scheme, the control system unit comprises a magnetic induction intensity adjusting module and a comprehensive thermal control module;
The intelligent magnetic induction and thermal control integrated technology is realized based on a magnetic induction intensity intelligent regulation technology and an electromagnetic and thermal control integrated technology;
the magnetic induction intensity adjusting module adopts a magnetic induction intensity intelligent adjusting technology to monitor and adjust the magnetic induction intensity of an alternating magnetic field so as to ensure the stable suspension and movement of the molten metal;
The comprehensive thermal control module controls the temperature of molten metal by using an electromagnetic and thermal control comprehensive technology, so that the stability of continuous casting and thermal processing processes is ensured;
The control system unit adopts an intelligent magnetic induction and thermal control integrated technology, and realizes stable suspension, movement and temperature control of the metal liquid in the continuous casting and thermal processing process through the synergistic effect of the magnetic induction intensity adjustment and the comprehensive thermal control module.
As a further improvement of the technical scheme, the intelligent magnetic induction and thermal control integrated technology ensures stable suspension and movement of molten metal and maintains the temperature of the molten metal, and the specific steps involved are as follows:
S4.1, initializing a magnetic induction intensity adjusting module and a comprehensive thermal control module, and starting a real-time monitoring system which comprises a magnetic induction intensity and temperature sensor;
s4.2, automatically adjusting the output power and the frequency of the alternating power supply according to the real-time data, and adjusting the water mist spraying system;
S4.3, collecting magnetic induction intensity, temperature, cooling medium temperature, power output and speed data, and optimizing magnetic induction intensity, cooling parameters, power and frequency.
As a further improvement of the technical scheme, the monitoring feedback unit comprises a real-time monitoring module and a data feedback module;
the real-time monitoring module is used for monitoring key parameters in the production process, including magnetic induction intensity and temperature, and providing real-time data to ensure stable production;
the data feedback module is used for analyzing the monitoring data, feeding back and optimizing control system parameters to the control system unit, wherein the control system parameters comprise magnetic induction intensity, cooling parameters, power and frequency.
Compared with the prior art, the invention has the beneficial effects that:
1. In the control method of the metal liquid magnetic suspension continuous casting on-line processing production line, the stable suspension and continuous conveying functions of the metal liquid can be realized in a non-contact manner by using an alternating magnetic field suspension conveying technology in the metal liquid suspension and conveying process, so that the problems of abrasion of a traditional crystallizer and excessive consumption of high-pressure cooling water are avoided.
2. In the control system of the molten metal magnetic suspension continuous casting online processing production line, the intelligent magnetic induction and thermal control integrated technology is used, so that the magnetic induction intensity and the temperature can be regulated in real time, the production flow is optimized, and the product quality and the production efficiency are ensured.
Drawings
Fig. 1 is a system configuration diagram of the present invention.
The meaning of each reference sign in the figure is:
1. a magnetic levitation transport unit; 2. a continuous casting unit; 3. an on-line processing unit; 4. a control system unit; 5. and monitoring a feedback unit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
Referring to fig. 1, a control method for a molten metal magnetic suspension continuous casting on-line processing production line is provided, which comprises the following steps:
the magnetic levitation transportation unit 1 adopts an alternating magnetic field levitation transportation technology to realize levitation and transportation of high-temperature metal liquid;
The magnetic levitation transport unit 1 comprises an alternating magnetic field module, a magnetic levitation module, a temperature regulation module and a continuous conveying module;
The alternating magnetic field module utilizes alternating current and a magnetizer, and embeds the magnetizer into a groove of the magnetizer to form a uniform and continuous alternating magnetic field and act on molten metal;
The magnetic levitation suspension module adopts a magnetic levitation technology to form an upward-radiating alternating magnetic field through an air-core transformer principle, and the magnetic induction intensity of the alternating magnetic field is upward radiated onto molten metal through a magnetizer opened by a magnetic circuit, so that the molten metal is repelled and suspended by induction;
The temperature regulation and control module utilizes a water mist spraying system to cool the molten metal so as to change the molten metal from a liquid phase to a solid phase;
The continuous conveying module utilizes an alternating magnetic field to realize continuous and stable conveying of molten metal.
In the magnetic suspension continuous casting process of the metal liquid, the magnetic suspension technology utilizes repulsion or attraction of a magnetic field to counteract the gravity of the metal liquid, so that the metal liquid is kept in a suspension state under the condition of no physical support.
The air-core transformer principle relates to the phenomenon that induced current is generated around a conductor by utilizing the change of a magnetic field, and in a magnetic suspension module, the design of the air-core transformer can be used for generating a uniform and continuous magnetic field, and the magnetic field layout can be more efficient through current control and is suitable for generating a large-range uniform magnetic field in a smaller space, so that stable suspension of molten metal is realized.
The alternating magnetic field suspension conveying technology is realized based on electromagnetic induction technology and magnetic suspension technology, is used for realizing non-contact suspension and continuous conveying of high-temperature metal liquid, realizes that a conductor and a magnetizer form a uniform alternating magnetic field, repels the metal liquid to suspend the metal liquid, regulates and controls the temperature of the metal liquid through a heat transfer mechanism, and finally enables the metal liquid to continuously move to a hot working machine, and the specific steps involved in the suspension and conveying of the high-temperature metal liquid are as follows:
S1.1, alternating supply frequency AndCurrent, generating alternating magnetic field：
；
Wherein, ；Is vacuum permeability; is the number of turns of the coil, Is the maximum current intensity of the alternating current;
S1.2 using an alternating magnetic field Generating magnetic levitation forceSo that the metal liquid is suspended:
；
Wherein, Is the maximum magnetic field strength of the alternating magnetic field; Is the volume of the metal liquid; Is vacuum magnetic permeability; Is the square of a sine function, and represents the time of the alternating magnetic field Intensity distribution of (2);； Representation pair Partial derivative of direction;
S1.3, spraying water mist on the suspended metal liquid to cool the metal liquid from a liquid phase to a solid phase
S1.4, utilizing magnetic buoyancyCalculating the molten metal conveying speed through a Navie-Stokes equation:
；
Wherein the said Is the density of the fluid; is the rate of change of velocity over time, i.e., the acceleration of the fluid; To be in the direction of Is fixed on the base; Is magnetic; Is a pressure gradient; Is the dynamic viscosity coefficient; Is the laplace operator of the velocity field.
The continuous casting unit 2 is used for continuously casting the metal liquid into a rectangular waste heat casting blank, maintaining the optimal hot working temperature and preparing continuous hot working;
The continuous casting unit 2 comprises a suspension restraint module and a rapid cooling module;
The suspension constraint module uses a rectangular casting blank suspension constraint technology to ensure that the molten metal keeps a rectangular shape in a suspension state;
The rapid cooling module adopts a water mist spray cooling technology, rapidly cools the molten metal to a solid phase through a water mist spray system, and rapidly enters a hot working machine.
The rectangular casting blank suspension constraint technology is realized based on an electromagnetic induction technology and provides repulsive forceSuspending the molten metal and applying lateral restraining forcesThe rectangular shape is maintained, and a mathematical model formula related to a rectangular casting blank suspension constraint technology is as follows:
Repulsive force ：；
Side restraining force：；
Wherein, Is time ofRepulsive force at the moment; Is the maximum magnetic field strength of the alternating magnetic field; Is the volume of the metal liquid; Is vacuum magnetic permeability; Is the square of a sine function, and represents the time of the alternating magnetic field Intensity distribution of (2);； Is a side restraining force; the magnetic field intensity of the side alternating magnetic field; Is the acting area of the side alternating magnetic field.
The water mist spray cooling technology is realized based on heat transfer and cooling technology, so that a solid-phase thin shell is formed rapidly by molten metal to wait for processing, and a mathematical model formula related to the water mist spray cooling technology is as follows:
Spray cooling heat transfer formula: ；
Wherein, Is the heat flux density; Is the heat transfer coefficient; is the surface area of the cooling zone; The surface temperature of the molten metal is; Is ambient temperature.
The online processing unit 3 uses a waste heat casting blank continuous hot processing technology to continuously convey the molten metal to a hot processing machine for processing;
the online processing unit 3 comprises a waste heat casting blank transmission module and a thermal processing module;
The waste heat casting blank continuous conveyor is used for continuously conveying the waste heat casting blank from the magnetic suspension area to the hot processing machinery;
The molten metal flows into the groove of the traction head and simultaneously must be sprayed with cooling liquid or cooling mist to enable the upper plane and the lower plane or the periphery of the molten metal to generate thin shells to bear traction, the traction system drags the molten metal into an alternating magnetic field, and the molten metal is moderately cooled into a residual heat casting blank with the optimal hot working temperature and immediately enters a hot working machine;
the hot processing module uses electromagnetic stirring and rapid cooling combination technology to perform rapid hot processing by utilizing waste heat to form materials and clean and refined parisons, and the mathematical formula related to the electromagnetic stirring and rapid cooling combination technology is as follows:
electromagnetic stirring force ：；
And (3) a casting blank cooling formula:；
Wherein the said Is electromagnetic stirring force; Is conductivity; is a velocity field; is the magnetic field strength; Is the cooling amount per unit time; Is the cooling heat transfer coefficient; For cooling the area surface; Is the cooling medium temperature.
The molten metal magnetic suspension continuous casting waste heat blank and the online hot processing production line can lead various molten metals such as steel, copper, aluminum and the like to be online into materials or net refined blanks, and the cross section shapes of products are various and can be achieved through the relevant hot processing of two casting blanks of plane shape and rectangle shape.
The control system unit 4 ensures stable suspension and movement of the molten metal by adopting an intelligent magnetic induction and thermal control integrated technology, and maintains the temperature of the molten metal;
the control system unit 4 comprises a magnetic induction intensity adjusting module and a comprehensive thermal control module;
The intelligent magnetic induction and thermal control integrated technology is realized based on a magnetic induction intensity intelligent regulation technology and an electromagnetic and thermal control integrated technology;
the magnetic induction intensity adjusting module adopts a magnetic induction intensity intelligent adjusting technology to monitor and adjust the magnetic induction intensity of an alternating magnetic field so as to ensure the stable suspension and movement of the molten metal;
The comprehensive thermal control module controls the temperature of molten metal by using electromagnetic and thermal control comprehensive technology, and ensures the stability of continuous casting and thermal processing processes.
The control system unit 4 adopts an intelligent magnetic induction and thermal control integrated technology, and realizes stable suspension, movement and temperature control of the metal liquid in the continuous casting and thermal processing process through the synergistic effect of magnetic induction intensity adjustment and the comprehensive thermal control module.
The intelligent magnetic induction and thermal control integrated technology ensures stable suspension and movement of the molten metal and maintains the temperature of the molten metal, and the specific steps involved are as follows:
S4.1, initializing a magnetic induction intensity adjusting module and a comprehensive thermal control module, and starting a real-time monitoring system which comprises a magnetic induction intensity and temperature sensor;
s4.2, automatically adjusting the output power and the frequency of the alternating power supply according to the real-time data, and adjusting the water mist spraying system;
S4.3, collecting magnetic induction intensity, temperature, cooling medium temperature, power output and speed data, and optimizing magnetic induction intensity, cooling parameters, power and frequency.
The monitoring feedback unit 5 is used for monitoring and recording parameters in the production process in real time and feeding data back to the control system unit 4;
the monitoring feedback unit 5 comprises a real-time monitoring module and a data feedback module;
the real-time monitoring module is used for monitoring key parameters in the production process, including magnetic induction intensity and temperature, and providing real-time data to ensure stable production;
The data feedback module is used for analyzing the monitoring data, feeding back and optimizing control system parameters to the control system unit 4, wherein the control system parameters comprise magnetic induction intensity, cooling parameters, power and frequency.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed.
Claims (4)
1. The control method of the molten metal magnetic suspension continuous casting on-line processing production line is characterized by comprising the following steps of: comprising the following steps:
The magnetic levitation transportation unit (1), the said magnetic levitation transportation unit (1) adopts the levitation transportation technology of alternating magnetic field to realize levitation and transportation of the high-temperature metal liquid;
The continuous casting unit (2) is used for continuously casting the metal liquid into a rectangular waste heat casting blank, maintaining the optimal hot working temperature and preparing continuous hot working;
The online processing unit (3) uses a waste heat casting blank continuous hot processing technology to continuously convey the molten metal to a hot processing machine for processing;
The control system unit (4) ensures stable suspension and movement of the molten metal by adopting an intelligent magnetic induction and thermal control integrated technology, and maintains the temperature of the molten metal;
the monitoring feedback unit (5) is used for monitoring and recording parameters in the production process in real time and feeding data back to the control system unit (4);
the magnetic suspension transport unit (1) comprises an alternating magnetic field module, a magnetic suspension module, a temperature regulation module and a continuous conveying module;
The alternating magnetic field module utilizes alternating current and a magnetizer, and embeds the magnetizer into a groove of the magnetizer to form a uniform and continuous alternating magnetic field and act on molten metal;
The magnetic levitation suspension module adopts a magnetic levitation technology to form an upward-radiating alternating magnetic field through an air-core transformer principle, and the magnetic induction intensity of the alternating magnetic field is upward radiated onto molten metal through a magnetizer opened by a magnetic circuit, so that the molten metal is repelled and suspended by induction;
The temperature regulation and control module utilizes a water mist spraying system to cool the molten metal so as to change the molten metal from a liquid phase to a solid phase;
The continuous conveying module utilizes an alternating magnetic field to realize continuous and stable conveying of molten metal;
The alternating magnetic field suspension conveying technology is realized based on electromagnetic induction technology and magnetic levitation technology, is used for non-contact suspension and continuous conveying of high-temperature metal liquid, realizes that a conductor and a magnetizer form a uniform alternating magnetic field, repels the metal liquid to suspend the metal liquid, regulates and controls the temperature of the metal liquid through a heat transfer mechanism, and finally enables the metal liquid to continuously move to a hot working machine, and the specific steps involved in the suspension and conveying of the high-temperature metal liquid are as follows:
S1.1, alternating supply frequency AndCurrent, generating alternating magnetic field：
；
Wherein, ；Is vacuum permeability; is the number of turns of the coil, Is the maximum current intensity of the alternating current;
S1.2 using an alternating magnetic field Generating magnetic levitation forceSo that the metal liquid is suspended:
；
Wherein, Is the maximum magnetic field strength of the alternating magnetic field; Is the volume of the metal liquid; Is vacuum magnetic permeability; Is the square of a sine function, and represents the time of the alternating magnetic field Intensity distribution of (2);； Representation pair Partial derivative of direction;
S1.3, spraying water mist on the suspended metal liquid to cool the metal liquid from a liquid phase to a solid phase;
s1.4, utilizing magnetic buoyancy Calculating the molten metal conveying speed through a Navie-Stokes equation:
；
Wherein the said Is the density of the fluid; is the rate of change of velocity over time, i.e., the acceleration of the fluid; To be in the direction of Is fixed on the base; Is magnetic; Is a pressure gradient; Is the dynamic viscosity coefficient; a laplace operator for the velocity field;
The continuous casting unit (2) comprises a suspension restraint module and a rapid cooling module;
The suspension constraint module uses a rectangular casting blank suspension constraint technology to ensure that the molten metal keeps a rectangular shape in a suspension state;
the rapid cooling module rapidly cools the molten metal to a solid phase by adopting a water mist spraying cooling technology through a water mist spraying system and rapidly enters a hot working machine;
The rectangular casting blank suspension constraint technology is realized based on an electromagnetic induction technology and provides repulsive force Suspending the molten metal and applying lateral restraining forcesThe rectangular shape is maintained, and a mathematical model formula related to a rectangular casting blank suspension constraint technology is as follows:
Repulsive force ：；
Side restraining force：；
Wherein, Is time ofRepulsive force at the moment; Is the maximum magnetic field strength of the alternating magnetic field; Is the volume of the metal liquid; Is vacuum magnetic permeability; Is the square of a sine function, and represents the time of the alternating magnetic field Intensity distribution of (2);； Is a side restraining force; the magnetic field intensity of the side alternating magnetic field; is the acting area of the side alternating magnetic field;
The water mist spray cooling technology is realized based on heat transfer and cooling technology, so that a solid-phase thin shell is formed rapidly by molten metal to wait for processing, and a mathematical model formula related to the water mist spray cooling technology is as follows:
Spray cooling heat transfer formula: ；
Wherein, Is the heat flux density; Is the heat transfer coefficient; is the surface area of the cooling zone; The surface temperature of the molten metal is; Is ambient temperature;
The online processing unit (3) comprises a waste heat casting blank transmission module and a thermal processing module;
The waste heat casting blank continuous conveyor is used for continuously conveying the waste heat casting blank from the magnetic suspension area to the hot processing machinery;
the hot processing module uses electromagnetic stirring and rapid cooling combination technology to perform rapid hot processing by utilizing waste heat to form materials and clean and refined parisons, and the mathematical formula related to the electromagnetic stirring and rapid cooling combination technology is as follows:
electromagnetic stirring force ：；
And (3) a casting blank cooling formula:；
Wherein the said Is electromagnetic stirring force; Is conductivity; is a velocity field; is the magnetic field strength; Is the cooling amount per unit time; Is the cooling heat transfer coefficient; For cooling the area surface; Is the cooling medium temperature.
2. The control method for the molten metal magnetic suspension continuous casting on-line processing production line according to claim 1, characterized by comprising the following steps: the control system unit (4) comprises a magnetic induction intensity adjusting module and a comprehensive thermal control module;
the magnetic induction intensity adjusting module adopts a magnetic induction intensity intelligent adjusting technology to monitor and adjust the magnetic induction intensity of an alternating magnetic field so as to ensure the stable suspension and movement of the molten metal;
The comprehensive thermal control module controls the temperature of molten metal by using electromagnetic and thermal control comprehensive technology, and ensures the stability of continuous casting and thermal processing processes.
3. The control method for the molten metal magnetic suspension continuous casting on-line processing production line according to claim 1, characterized by comprising the following steps: the intelligent magnetic induction and thermal control integrated technology ensures stable suspension and movement of the molten metal and maintains the temperature of the molten metal, and the specific steps involved are as follows:
S4.1, initializing a magnetic induction intensity adjusting module and a comprehensive thermal control module, and starting a real-time monitoring system which comprises a magnetic induction intensity and temperature sensor;
s4.2, automatically adjusting the output power and the frequency of the alternating power supply according to the real-time data, and adjusting the water mist spraying system;
S4.3, collecting magnetic induction intensity, temperature, cooling medium temperature, power output and speed data, and optimizing magnetic induction intensity, cooling parameters, power and frequency.
4. The control method for the molten metal magnetic suspension continuous casting on-line processing production line according to claim 1, characterized by comprising the following steps: the monitoring feedback unit (5) comprises a real-time monitoring module and a data feedback module;
the real-time monitoring module is used for monitoring key parameters in the production process, including magnetic induction intensity and temperature, and providing real-time data to ensure stable production;
the data feedback module is used for analyzing the monitoring data, feeding back and optimizing control system parameters to the control system unit (4), wherein the control system parameters comprise magnetic induction intensity, cooling parameters, power and frequency.
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| US4693299A (en) * | 1986-06-05 | 1987-09-15 | Westinghouse Electric Corp. | Continuous metal casting apparatus |
| DE4023737A1 (en) * | 1990-07-26 | 1992-01-30 | Harf Hans | Continuously producing seamless tubing - by deforming concasting rod in die fitted with magnetically suspended mandrel |
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