CN113792504A - Structural design method of direct current electric arc furnace - Google Patents
Structural design method of direct current electric arc furnace Download PDFInfo
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- 238000010891 electric arc Methods 0.000 title claims abstract description 74
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- 238000004364 calculation method Methods 0.000 claims abstract description 51
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- 230000008878 coupling Effects 0.000 claims abstract description 26
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- 230000005672 electromagnetic field Effects 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
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- 238000003723 Smelting Methods 0.000 description 5
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- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
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Abstract
The present disclosure provides a design method for a structure of a direct current electric arc furnace, which comprises: establishing an editable three-dimensional model of the direct current electric arc furnace, wherein the three-dimensional model comprises a plurality of editable preset structure parameters, and the three-dimensional models of the direct current electric arc furnace with different structures can be established by editing the preset structure parameters; establishing a simulation calculation method of a three-dimensional model of the direct current electric arc furnace, wherein performance parameters of the three-dimensional model can be determined through the simulation calculation method; determining simulation software according to a method for establishing three-dimensional models of direct current electric arc furnaces with different structures and a simulation calculation method; after the structural parameters are determined, a design three-dimensional model of the electric arc furnace is established through simulation software, electromagnetic field simulation calculation and multi-physical field coupling simulation calculation are carried out, and performance parameters of the design three-dimensional model are determined; judging whether the determined performance parameters of the designed three-dimensional model are in a preset range or not; and if the performance parameters are within the preset range, judging that the structural parameters are reasonable.
Description
Technical Field
The disclosure relates to the technical field of electric arc furnaces, in particular to a structural design method of a direct-current electric arc furnace.
Background
The direct current electric arc furnace utilizes electric arc generated between an electrode and furnace burden to generate heat, thereby achieving the purpose of smelting. Can be used for melting steel or alloy and nonferrous metal. The electric arc of the direct current electric arc furnace is stable and centralized, the molten pool is well stirred, the temperature in the furnace is uniformly distributed, and the erosion amount of the furnace lining is small; the current and voltage fluctuation is small, the impact on a power grid is reduced, and the service life of the cable is prolonged.
In the prior art, when the direct current electric arc furnace is designed by a method based on multi-physical field coupling calculation, the modeling method has poor expansibility, comprises a large amount of repetitive work, consumes time and labor, and cannot optimize key parameters. If the thickness of the metal layer changes, all modeling work needs to be operated again in sequence to complete the modeling process.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The purpose of the disclosed embodiment is to provide a structural design method for a direct current electric arc furnace, which can automatically generate a three-dimensional model only by inputting required parameters, greatly shorten the modeling time, reduce the modeling workload and improve the efficiency.
According to an aspect of the disclosed embodiments, there is provided a method for designing a structure of a dc arc furnace, the method comprising:
establishing an editable three-dimensional model of the direct current electric arc furnace, wherein the three-dimensional model comprises a plurality of editable preset structure parameters, and the three-dimensional models of the direct current electric arc furnace with different structures can be established by editing the preset structure parameters;
establishing a simulation calculation method of a three-dimensional model of the direct current electric arc furnace, wherein performance parameters of the three-dimensional model can be determined through the simulation calculation method;
determining simulation software according to a method for establishing three-dimensional models of direct current electric arc furnaces with different structures and the simulation calculation method;
after the structural parameters are determined, establishing a design three-dimensional model of the arc furnace through the simulation software, performing electromagnetic field simulation calculation and multi-physical field coupling simulation calculation, and determining the performance parameters of the design three-dimensional model;
judging whether the determined performance parameters of the designed three-dimensional model are in a preset range or not;
and if the performance parameter is within the preset range, judging that the structural parameter is reasonable.
In an exemplary embodiment of the present disclosure, the design method further includes:
and if the performance parameters are not in the preset range, judging that the structural parameters are unreasonable.
In an exemplary embodiment of the present disclosure, the design method further includes:
and when the performance parameters are not in the preset range, optimizing the structural parameters according to the performance parameters.
In an exemplary embodiment of the present disclosure, a simulation calculation method for building a three-dimensional model of the dc arc furnace includes:
determining an electromagnetic field simulation calculation method for the three-dimensional model of the direct current electric arc furnace;
and determining a multi-physical-field coupling simulation calculation method for the three-dimensional model.
In an exemplary embodiment of the disclosure, a coupling interface of an electromagnetic field-flow field-temperature field of the direct current arc furnace is established to determine a multi-physical field coupling simulation calculation method for the three-dimensional model.
In an exemplary embodiment of the present disclosure, the creating an editable three-dimensional model of a direct current arc furnace includes:
presetting two-dimensional structure parameters of the direct current electric arc furnace, and rotating by a preset central shaft according to the two-dimensional structure parameters of the direct current electric arc furnace to form a three-dimensional model of the direct current electric arc furnace;
and establishing an editable three-dimensional model of the direct-current electric arc furnace by editing the two-dimensional structure parameters.
In an exemplary embodiment of the present disclosure, the plurality of editable preset structure parameters are converted into the two-dimensional structure parameters, so as to edit the two-dimensional structure parameters.
In an exemplary embodiment of the present disclosure, the preset configuration parameters include: electrode insertion depth, slag layer thickness, furnace lining diameter and metal layer thickness.
In an exemplary embodiment of the present disclosure, the performance parameters include: heating power of the molten pool, temperature field distribution and stirring intensity.
In an exemplary embodiment of the present disclosure, the simulation software includes a process parameter setting interface and a display interface.
On one hand, the method for designing the structure of the direct current electric arc furnace has the advantages that the editable three-dimensional model of the direct current electric arc furnace is established, the three-dimensional model comprises a plurality of editable preset structure parameters, then the three-dimensional models of the direct current electric arc furnace with different structures can be established by editing the preset structure parameters, the automatic generation of the three-dimensional model is realized, the modeling time is greatly shortened, the modeling workload is reduced, the efficiency is improved, the large amount of repeated work before the coupling analysis of multiple physical fields is avoided, the working efficiency of the coupling calculation of the multiple physical fields is improved, and the method has the advantages of simple modeling, convenient operation and convenient realization; on the other hand, simulation software is determined according to a method for establishing three-dimensional models of the direct current electric arc furnace with different structures and a simulation calculation method, electromagnetic field-flow field-temperature field coupling calculation can be rapidly carried out, molten pool heating power, temperature field distribution and stirring intensity are calculated, accordingly reasonability of equipment structure parameters is determined, the equipment structure parameters are optimized according to a primary simulation result, research and development cost is reduced, and research and development period is shortened. The method is suitable for direct current electric arc furnaces of any type and electric arc furnaces of any process parameter, has wide application range, and is suitable for professional technicians and designers.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty. In the drawings:
fig. 1 is a flow chart of a method for designing a structure of a dc arc furnace according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a dc electric arc furnace according to an embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure. The terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
The inventor finds that the direct current electric arc furnace has different smelting heating power and cooling systems under different working conditions, the modeling of the direct current electric arc furnace occupies most time of the whole simulation process, if the direct current electric arc furnace with each structure is independently modeled, a large amount of repeated work is caused, time and labor are consumed, and the working efficiency is reduced. The direct current electric arc furnace has a severe smelting environment, high-temperature and high-pressure toxic gases exist, and the direct measurement of the temperature, the pressure or other parameters of a molten pool in the internal smelting process can not be finished almost, so the whole smelting process is finished by most of experience and semi-experience methods.
In view of the above technical problems, the present disclosure provides a method for designing a structure of a dc arc furnace, as shown in fig. 1, the method for designing a structure of a dc arc furnace includes:
s100, establishing an editable three-dimensional model of the direct current electric arc furnace, wherein the three-dimensional model comprises a plurality of editable preset structure parameters, and the three-dimensional models of the direct current electric arc furnace with different structures can be established by editing the preset structure parameters;
s200, establishing a simulation calculation method of the three-dimensional model of the direct current electric arc furnace, wherein the performance parameters of the three-dimensional model can be determined through the simulation calculation method;
s300, determining simulation software according to a method for establishing three-dimensional models and a simulation calculation method of direct current electric arc furnaces with different structures;
s400, after the structural parameters are determined, establishing a design three-dimensional model of the electric arc furnace through simulation software, performing electromagnetic field simulation calculation and multi-physical field coupling simulation calculation, and determining performance parameters of the design three-dimensional model;
s500, judging whether the determined performance parameters of the designed three-dimensional model are in a preset range;
and S600, if the performance parameters are within a preset range, judging that the structural parameters are reasonable.
On one hand, the method for designing the structure of the direct current electric arc furnace has the advantages that the editable three-dimensional model of the direct current electric arc furnace is established, the three-dimensional model comprises a plurality of editable preset structure parameters, then the three-dimensional models of the direct current electric arc furnace with different structures can be established by editing the preset structure parameters, the automatic generation of the three-dimensional model is realized, the modeling time is greatly shortened, the modeling workload is reduced, the efficiency is improved, the large amount of repeated work before the coupling analysis of multiple physical fields is avoided, the working efficiency of the coupling calculation of the multiple physical fields is improved, and the method has the advantages of simple modeling, convenient operation and convenient realization; on the other hand, simulation software is determined according to a method for establishing three-dimensional models of the direct current electric arc furnace with different structures and a simulation calculation method, electromagnetic field-flow field-temperature field coupling calculation can be rapidly carried out, molten pool heating power, temperature field distribution and stirring intensity are calculated, accordingly reasonability of equipment structure parameters is determined, the equipment structure parameters are optimized according to a primary simulation result, research and development cost is reduced, and research and development period is shortened. The method is suitable for direct current electric arc furnaces of any type and electric arc furnaces of any process parameter, has wide application range, and is suitable for professional technicians and designers.
Hereinafter, each step in the method for designing the structure of the dc arc furnace provided by the present disclosure will be described in detail.
In step S100, an editable three-dimensional model of the dc arc furnace is established, where the three-dimensional model includes a plurality of editable preset structural parameters, and by editing the preset structural parameters, three-dimensional models of dc arc furnaces with different structures can be established.
Specifically, the technical scheme of the present disclosure is illustrated by taking a certain 400KVA direct current electric arc furnace as an example, and as shown in fig. 2, the direct current electric arc furnace of this type mainly comprises a graphite electrode 10, a water-cooled furnace cover, a furnace lining, a cooling water jacket, a slag layer 20, a metal layer 30, a conductive brick 40, a water-cooled bottom electrode 50, and other components.
Wherein, Ansys workbench simulation software can be adopted to open the DM module for modeling; establishing a direct current electric arc furnace structure model: the parameters of electrode insertion depth, slag layer thickness, furnace lining diameter, metal layer thickness and the like are parameterized and modeled to establish parameters of two-dimensional furnace lining thickness, slag layer thickness, furnace lining radius, metal layer thickness and the like, and the parameters are rotated by taking an X axis as a central axis to form a three-dimensional model of the direct current arc furnace.
In step S200, a simulation calculation method of the three-dimensional model of the dc arc furnace is established, and the performance parameters of the three-dimensional model can be determined by the simulation calculation method.
Specifically, an electromagnetic field simulation calculation method for a three-dimensional model of a direct-current electric arc furnace is determined. And opening maxwell electromagnetic field simulation software, introducing the three-dimensional model of the electric arc furnace structure into the software, defining boundary conditions, and performing electromagnetic field simulation.
And determining a multi-physical-field coupling simulation calculation method for the three-dimensional model. Developing a special coupling interface of an electromagnetic field, a flow field and a temperature field of the direct current electric arc furnace: the format of the derived Lorentz magnetic field data is txt, and the meaning of the file content is as follows: a first row of Lorentz force data point numbers, a second row threshold; creating udf a file; after the fluent load udf is opened, the number of UDMs used is set to 3; adding momentum source terms in three directions in a calculation domain needing adding Loran magnetic force; udf is hung in the initialization process; click on Initialize. The entire calculation file for the solution is saved.
In step S300, simulation software is determined according to a method for building three-dimensional models and a simulation calculation method of dc arc furnaces with different structures.
Specifically, a method for establishing three-dimensional models of direct current electric arc furnaces with different structures and a simulation calculation method are secondarily developed and packaged to form professional simulation software.
Performing secondary development in a high-level programming language C # based on electromagnetic and fluid simulation software to develop special direct-current electric arc furnace simulation design software; and (3) building a customized friendly structure parameter setting interface, which comprises a parameter setting interface and a display interface, wherein the parameter setting interface comprises the diameter of a furnace lining, the thickness of a slag layer, the thickness of a metal layer, the insertion depth of an electrode and the like.
In step S400, after the structural parameters are determined, a design three-dimensional model of the arc furnace is established by simulation software, electromagnetic field simulation calculation and multi-physical field coupling simulation calculation are performed, and performance parameters of the design three-dimensional model are determined.
Specifically, after the structural parameters are determined, parameters such as the diameter of a furnace lining, the thickness of a slag layer, the thickness of a metal layer, the insertion depth of an electrode and the like are input into a parameter setting interface, and a three-dimensional model is automatically generated; building a process parameter setting interface; carrying out multi-physical field coupling simulation by electric shock starting calculation; and (5) finishing calculation, displaying a result and evaluating the structural rationality. Wherein the performance parameters include: heating power of the molten pool, temperature field distribution and stirring intensity.
Presetting two-dimensional structure parameters of the direct current electric arc furnace, and rotating by a preset central shaft according to the two-dimensional structure parameters of the direct current electric arc furnace to form a three-dimensional model of the direct current electric arc furnace; and establishing an editable three-dimensional model of the direct-current electric arc furnace by editing the two-dimensional structure parameters. The method comprises the following steps of converting a plurality of editable preset structure parameters into two-dimensional structure parameters through software programming, and realizing editing of the two-dimensional structure parameters.
In step S500, it is determined whether the determined performance parameter of the designed three-dimensional model is within a preset range.
Specifically, whether parameters such as heating power of a molten pool, temperature field distribution and stirring intensity of the determined design three-dimensional model are in a preset range or not is judged. A standard reference value or reference range may be preset.
In step S600, if the performance parameter is within the preset range, it is determined that the structural parameter is reasonable.
Specifically, if the performance parameters are within the preset range, the structural parameters are judged to be reasonable, so that the rationality of the structural parameters of the equipment is determined, and the structural design of the direct-current electric arc furnace is realized.
The structural design method of the direct current electric arc furnace provided by the disclosure further comprises the following steps:
step S700: and if the performance parameters are not in the preset range, judging that the structural parameters are unreasonable.
Specifically, if the determined parameters of the three-dimensional model, such as the heating power of the molten pool, the distribution of the temperature field, the stirring intensity and the like, are not in the preset range, the structural parameters are judged to be unreasonable. The results of various schemes can be compared, analyzed and compared, and the optimal scheme can be quickly selected.
If no reasonable design scheme of the structural parameters exists, the structural parameters can be optimized according to simulated test performance data and adjusted to be within a preset range, and the purpose of optimizing the structural parameters of the equipment according to the primary simulation result is achieved.
In an example, a parameterized modeling method, a multi-physics coupling calculation and optimization method compiled by the invention are described by combining a direct current arc furnace structure of a certain engineering project as follows:
1. starting multi-physical field simulation software of the direct-current electric arc furnace, and inputting a user name and a password for logging in;
2. skipping the page to a structural parameter page, and inputting structural parameters;
3. clicking and storing to generate a three-dimensional model;
4. clicking the next step, and inputting process parameters;
5. click calculation and solution;
6. according to the preliminary simulation result (namely the heating power of the molten pool, the distribution of the temperature field and the stirring intensity), modifying the structural parameters, and optimizing and calculating until obtaining the optimal structure.
Based on the high-level programming language C #, a friendly parameter setting interface is set up, and even personnel who do not use Designmodeler modeling software can complete the modeling process. The whole modeling process is strong in practicability, simple and clear in operation and wide in application range; based on the multi-physics coupling parameterization modeling method, through a customized friendly parameter setting interface, a user only needs to input the electrode insertion depth, the slag layer thickness, the furnace lining diameter, the metal layer thickness and other structural and technological parameters to realize automatic generation of a three-dimensional model, so that the modeling time is greatly shortened, the modeling workload is reduced, and the efficiency is improved. A large amount of repeated modeling work before multi-physical-field simulation of the direct-current electric arc furnace is avoided, the modeling period is shortened, and the working efficiency of multi-physical-field coupling analysis is improved. The invention develops the coupling interface of electromagnetic field simulation and fluid simulation, can realize the coupling calculation of the electromagnetic field-flow field-temperature field by simple operation, improves the calculation accuracy and reduces the research and development cost.
In particular, according to an embodiment of the present invention, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the invention include a computer program product comprising a computer program embodied on a computer-readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication section, and/or installed from a removable medium. The computer program, when executed by a Central Processing Unit (CPU), performs the above-described functions defined in the system of the present application.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A method for designing a structure of a direct current electric arc furnace is characterized by comprising the following steps:
establishing an editable three-dimensional model of the direct current electric arc furnace, wherein the three-dimensional model comprises a plurality of editable preset structure parameters, and the three-dimensional models of the direct current electric arc furnace with different structures can be established by editing the preset structure parameters;
establishing a simulation calculation method of a three-dimensional model of the direct current electric arc furnace, wherein performance parameters of the three-dimensional model can be determined through the simulation calculation method;
determining simulation software according to a method for establishing three-dimensional models of direct current electric arc furnaces with different structures and the simulation calculation method;
after the structural parameters are determined, establishing a design three-dimensional model of the arc furnace through the simulation software, performing electromagnetic field simulation calculation and multi-physical field coupling simulation calculation, and determining the performance parameters of the design three-dimensional model;
judging whether the determined performance parameters of the designed three-dimensional model are in a preset range or not;
and if the performance parameter is within the preset range, judging that the structural parameter is reasonable.
2. The design method of claim 1, further comprising:
and if the performance parameters are not in the preset range, judging that the structural parameters are unreasonable.
3. The design method of claim 2, further comprising:
and when the performance parameters are not in the preset range, optimizing the structural parameters according to the performance parameters.
4. The design method of claim 1, wherein the simulation calculation method for establishing the three-dimensional model of the direct current arc furnace comprises:
determining an electromagnetic field simulation calculation method for the three-dimensional model of the direct current electric arc furnace;
and determining a multi-physical-field coupling simulation calculation method for the three-dimensional model.
5. The design method of claim 4, wherein a coupling interface of electromagnetic field-flow field-temperature field of the direct current electric arc furnace is established to determine a calculation method for performing multi-physical field coupling simulation on the three-dimensional model.
6. The design method of claim 1, wherein said creating an editable three-dimensional model of a dc arc furnace comprises:
presetting two-dimensional structure parameters of the direct current electric arc furnace, and rotating by a preset central shaft according to the two-dimensional structure parameters of the direct current electric arc furnace to form a three-dimensional model of the direct current electric arc furnace;
and establishing an editable three-dimensional model of the direct-current electric arc furnace by editing the two-dimensional structure parameters.
7. The design method according to claim 6, wherein the editing of the two-dimensional structure parameters is performed by converting the plurality of editable preset structure parameters into the two-dimensional structure parameters.
8. The design method of claim 1, wherein the preset configuration parameters comprise: electrode insertion depth, slag layer thickness, furnace lining diameter and metal layer thickness.
9. The design method of claim 1, wherein the performance parameters comprise: heating power of the molten pool, temperature field distribution and stirring intensity.
10. The design method of claim 1, wherein the simulation software comprises a process parameter setting interface and a display interface.
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| CN111159955A (en) * | 2020-01-06 | 2020-05-15 | 大连理工大学 | Method for calculating and improving eddy current loss of closed arc furnace or submerged arc furnace |
| CN111611753A (en) * | 2020-05-13 | 2020-09-01 | 广东省智能制造研究所 | Design method of blanket with uniform temperature rise |
| CN111783253A (en) * | 2020-07-20 | 2020-10-16 | 华南农业大学 | CFD-based air-assisted sprayer structural parameter optimization design method |
| CN112733338A (en) * | 2020-12-28 | 2021-04-30 | 彩虹显示器件股份有限公司 | Design method of muffle furnace heating system |
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