CN108038307B - Method for simulating movement locus of desulfurizer in molten iron - Google Patents
Method for simulating movement locus of desulfurizer in molten iron Download PDFInfo
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- CN108038307B CN108038307B CN201711309379.4A CN201711309379A CN108038307B CN 108038307 B CN108038307 B CN 108038307B CN 201711309379 A CN201711309379 A CN 201711309379A CN 108038307 B CN108038307 B CN 108038307B
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Abstract
The invention discloses a method for simulating a movement track of a desulfurizing agent in molten iron, which comprises the steps of firstly establishing a three-dimensional coordinate system in an LAMMPS software modeling environment, and establishing a cylindrical simulation box based on the size of a molten iron tank; creating a plurality of regions in a similarity box, creating molecules in the regions after creation is completed, and then classifying each region into a group; setting corresponding parameters through LAMMPS; leading the written molecular dynamics model into LAMMPS software through Ubuntu to generate a micro model of the hot metal ladle and the desulfurizer; according to stirring flow field parameters needing to be simulated, inputting corresponding stirring flow field parameters in the micro model through a fix command, obtaining a corresponding simulation result after operation, performing data processing on the simulation result through Matlab software, and performing visualization processing through VMD to obtain the movement track of the desulfurizing agent in the molten iron tank under the corresponding stirring flow field parameters. The invention simulates the movement track of the desulfurizer in the molten iron on the macroscopic size from the microcosmic aspect, and is simple and efficient.
Description
Technical Field
The invention belongs to the technical field of molten iron desulphurization, relates to a method for researching the movement locus of a desulfurizer in molten iron, and particularly relates to a method for simulating the movement locus of the desulfurizer in the molten iron.
Background
The mechanical stirring desulfurization of molten iron is a necessary process for producing high-quality steel, particularly special-purpose steel (such as steel for aircraft carrier splints) and high-value-added steel (such as silicon steel), is one of key technologies in the production process of clean steel, and has very important significance for improving the steelmaking quality, so that in order to better realize the effect of molten iron desulfurization, the motion condition of a desulfurizing agent in the molten iron is usually simulated before actual desulfurization, and the size and the rotating speed of a desulfurization stirrer meeting the condition that the desulfurizing agent is maximally dispersed and distributed are searched. In the prior art, the desulfurizer motion trajectory simulation method mainly comprises a Fluent fluid simulation method and an image processing method.
The Fluent simulation is mainly characterized in that a three-dimensional model of a molten iron tank, a stirrer and a desulfurizing agent is manufactured through three-dimensional modeling software and then is led into Ansys, and the movement locus of the desulfurizing agent is obtained by inputting parameters such as the rotating speed of the molten iron stirrer, the attribute of molten iron and the like.
The method of image processing is to obtain the final result by performing the molten iron desulfurization experiment by simulating molten iron tanks of different sizes by manufacturing cylindrical transparent tanks of different sizes, then manufacturing stirrers of different sizes, finally replacing molten iron with water, replacing the desulfurizing agent with colored small particles, and performing the experiment in a laboratory: and observing the diffusion condition of the desulfurizing agent in molten iron when the molten iron tanks and the stirrers with different sizes work, shooting by using a high-speed camera, and calculating the area ratio of the desulfurizing agent after the desulfurizing agent is diffused in the water in a later picture by using an image processing technology to obtain the diffusion condition of the desulfurizing agent.
The research methods are all established on a macroscopic scale, can carry out qualitative or quantitative analysis on the diffusion condition of the desulfurizing agent in molten iron, and have great influence on the simulation efficiency due to the fact that a plurality of variables of the size of the molten iron tank, the size of the stirrer and the rotating speed of the stirrer are involved when the motion track of the desulfurizing agent in the molten iron is simulated, when the variables change, a three-dimensional model needs to be established again or experiments need to be carried out again, and the process is very complicated. Molecular dynamics can establish a link between macroscopic research and microscopic simulation, and is considered as a third scientific means except theoretical analysis and experimental observation in the new century. The molecular dynamics is taken as a theoretical guide and is combined with molecular dynamics software, and a related technology for analyzing the movement track of the desulfurizing agent in the molten iron from the view point of microscopic simulation is still lacked.
Disclosure of Invention
The invention aims to provide a brand-new method for simulating the movement track of a desulfurizing agent during molten iron desulfurization stirring, which can quickly, simply and conveniently modify model parameters when the sizes of a molten iron tank body, a molten iron stirrer and the rotating speed of the molten iron stirrer change.
The technical scheme adopted for realizing the method is as follows:
a method for simulating the movement track of a desulfurizing agent in molten iron is characterized by comprising the following steps: the method is based on molecular dynamics software LAMMPS to establish a microscopic model of the hot metal ladle and the desulfurizer, and comprises the following steps:
the method comprises the following steps: firstly, establishing a three-dimensional coordinate system in an LAMMPS software modeling environment, and establishing a cylindrical simulation box by taking a coordinate origin as a base point based on the size of the hot-metal ladle, wherein the simulation box represents a hot-metal ladle model;
step two: creating a plurality of spherical regions in a similarity box based on the first step, wherein each region is a space geometric region and represents the initial position of the desulfurizer, molecules are created in each region after creation, the molecules in each region after creation are simulated desulfurizer particles, and then each region is classified into a group;
step three: setting corresponding parameters of the micro models of the hot metal tank and the desulfurizer through LAMMPS to complete the writing and setting of the molecular dynamics model;
step four: leading the written molecular dynamics model into LAMMPS software through Ubuntu to generate a micro model of the hot metal ladle and the desulfurizer;
step five: inputting corresponding stirring flow field parameters in the micro model through a fix command according to the stirring flow field parameters to be simulated, and obtaining a corresponding simulation result and a lammppstrj file and a log file after operation;
step six: and (4) carrying out data processing on the log file obtained in the fifth step based on Matlab software, processing the lammpstrj file through VMD, and carrying out visual processing on the movement track of the desulfurizing agent to obtain the movement track of the desulfurizing agent in the molten iron tank under the corresponding stirring flow field parameters.
As an improvement, in step three, the parameter setting of the microscopic model includes setting of intermolecular potential energy selection, dimension selection, bond length setting, periodic boundary conditions, system selection, step length setting and step number, intermolecular force field coefficients, lattice structures and calculation methods.
In step five, the flow field parameters comprise the size of the stirrer, and parameters of flow rate, temperature and liquid level height of molten iron.
As an improvement, the calculation method selects the L-J potential which is used for describing an interaction model between two neutral atoms or molecules, and the formula is as follows:
epsilon is the depth of the potential well and reflects the strength of the mutual attraction between two atoms or molecules; σ is the distance between atoms or molecules when the action potential is equal to 0, r is the distance between atoms or molecules in the calculation process, VLJIs in the L-J potential.
And as an improvement, modifying the size of the hot metal ladle and the stirring flow field parameters, obtaining the hot metal ladle and the micro model of the desulfurizer with different sizes and stirring flow field parameters according to the first step to the sixth step, and analyzing the change rule of the diffusion of the desulfurizer in the molten iron under the condition of different sizes and stirring flow field parameters.
The invention has the beneficial effects that:
the invention simulates the movement track of the desulfurizer in the molten iron on the macroscopic dimension in the microcosmic aspect, provides a simulation means for technical improvement on the production of high-quality steel, more truly reflects the movement mechanical property of the desulfurizer in the molten iron, and can change parameters for the movement simulation of different dimensions and conditions without modeling again, thus being simple and efficient.
Drawings
FIG. 1 is a block diagram of the process of the present invention.
Detailed Description
The invention is illustrated in the following with reference to the accompanying drawings.
It should be noted that the english language given in the present invention is defined by the present invention, and no definition is given according to the general meaning, and LAMMP used in the present invention is the molecular dynamics software; the simulation box represents a hot metal ladle model, which is called a hot metal ladle for short; the region defines a space geometric region, which is defined as a space region containing the initial position of the desulfurizer in the method; group defines atoms contained in the defined region as a group for applying a force to the atoms in the region; fix is a command of the LAMMPS software that can impose constraints on a set of atoms; VMD is a molecular visualization program used for performing visualization processing on the microscopic models for generating the hot metal ladle and the desulfurizer; the lammpstrj file contains output files of various coordinate data; the log file is a system log file; matlab is a commercial mathematical software produced by MathWorks, Inc. in the United states, and is used in high-level technical computing languages and interactive environments for algorithm development, data visualization, data analysis, and numerical computation.
As shown in fig. 1, a method for simulating a movement locus of a desulfurizing agent in molten iron, which is based on molecular dynamics software LAMMPS to establish a microscopic model of a molten iron tank and the desulfurizing agent, comprises the following steps:
the method comprises the following steps: firstly, establishing a three-dimensional coordinate system in an LAMMPS software modeling environment, and establishing a cylindrical simulation box by taking a coordinate origin (0, 0, 0) as a base point based on the size of the molten iron tank, wherein the simulation box represents a molten iron tank model;
step two: creating a plurality of spherical regions in a similarity box based on the first step, wherein each region is a space geometric region and represents the initial position of the desulfurizer, molecules are created in each region after creation, the molecules in each region after creation are simulated desulfurizer particles, and then each region is classified into a group;
step three: setting corresponding parameters of the micro models of the hot metal tank and the desulfurizer through LAMMPS;
step four: leading the written molecular dynamics model into LAMMPS software through Ubuntu to generate a micro model of the hot metal ladle and the desulfurizer;
step five: inputting corresponding stirring flow field parameters in the micro model through a fix command according to the stirring flow field parameters to be simulated, obtaining a corresponding simulation result after operation, and obtaining a lammpstrj file and a log file, wherein the flow field parameters comprise the size of a stirrer and the parameters of the flow speed, the temperature and the liquid level height of molten iron;
step six: and (4) carrying out data processing on the log file obtained in the fifth step based on Matlab software, processing the lammpstrj file through VMD, and carrying out visual processing on the movement track of the desulfurizing agent to obtain the movement track of the desulfurizing agent in the molten iron tank under the corresponding stirring flow field parameters.
Step seven: modifying the sizes of the hot metal ladle and the desulfurizer, obtaining micro models of the hot metal ladle and the desulfurizer with different sizes and stirring flow field parameters according to the first step to the sixth step, and analyzing the change rule of the diffusion of the desulfurizer in the hot metal under the conditions of different sizes and stirring flow field parameters.
The parameter setting of the microscopic model comprises the setting of intermolecular potential energy selection, dimension selection, bond length setting, periodic boundary conditions, system selection, step length setting, step number setting, intermolecular force field coefficients, lattice structures and calculation methods.
The calculation method selects L-J potential, wherein the L-J potential is used for describing an interaction model between two neutral atoms or molecules, and the formula is as follows:
epsilon is the depth of the potential well and reflects the strength of the mutual attraction between two atoms or molecules; σ is the distance between atoms or molecules when the action potential is equal to 0, r is the distance between atoms or molecules in the calculation process, VLJIs in the L-J potential.
Claims (5)
1. A method for simulating the movement track of a desulfurizing agent in molten iron is characterized by comprising the following steps: the method is based on molecular dynamics software LAMMPS to establish a microscopic model of the hot metal ladle and the desulfurizer, and comprises the following steps:
the method comprises the following steps: firstly, establishing a three-dimensional coordinate system in an LAMMPS software modeling environment, and establishing a cylindrical simulation box by taking a coordinate origin as a base point based on the size of the hot-metal ladle, wherein the simulation box represents a hot-metal ladle model;
step two: creating a plurality of spherical regions in a similarity box based on the first step, wherein each region is a space geometric region and represents the initial position of the desulfurizer, molecules are created in each region after creation, the molecules in each region after creation are simulated desulfurizer particles, and then each region is classified into a group;
step three: setting corresponding parameters of the micro models of the hot metal tank and the desulfurizer through LAMMPS to complete the writing and setting of the molecular dynamics model;
step four: leading the written molecular dynamics model into LAMMPS software through Ubuntu to generate a micro model of the hot metal ladle and the desulfurizer;
step five: inputting corresponding stirring flow field parameters in the micro model through a fix command according to the stirring flow field parameters to be simulated, and obtaining a corresponding simulation result and a lammppstrj file and a log file after operation;
step six: and (4) carrying out data processing on the log file obtained in the fifth step based on Matlab software, processing the lammpstrj file through VMD, and carrying out visual processing on the movement track of the desulfurizing agent to obtain the movement track of the desulfurizing agent in the molten iron tank under the corresponding stirring flow field parameters.
2. The method for simulating the movement locus of the desulfurizing agent in the molten iron according to claim 1, which is characterized in that: in the third step, the parameter setting of the microscopic model comprises the setting of intermolecular potential energy selection, dimension selection, bond length setting, periodic boundary conditions, system selection, step length setting, step number setting, intermolecular force field coefficients, lattice structures and a calculation method.
3. The method for simulating the movement locus of the desulfurizing agent in the molten iron according to claim 2, wherein the method comprises the following steps: and fifthly, the flow field parameters comprise the size of the stirrer, the flow speed of molten iron, the temperature and the liquid level height parameters.
4. The method for simulating the movement locus of the desulfurizing agent in the molten iron according to claim 3, wherein the method comprises the following steps: the calculation method selects L-J potential, wherein the L-J potential is used for describing an interaction model between two neutral atoms or molecules, and the formula is as follows:
epsilon is the depth of the potential well and reflects the strength of the mutual attraction between two atoms or molecules; σ is the distance between atoms or molecules when the action potential is equal to 0, r is the distance between atoms or molecules in the calculation process, VLJIs in the L-J potential.
5. The method for simulating the movement locus of the desulfurizing agent in the molten iron according to any one of claims 1 to 4, wherein the method comprises the following steps: modifying the size of the hot metal ladle and the parameters of the stirring flow field, obtaining the micro models of the hot metal ladle and the desulfurizer with different sizes and parameters of the stirring flow field according to the first step to the sixth step, and analyzing the change rule of the diffusion of the desulfurizer in the hot metal under the condition of different sizes and parameters of the stirring flow field.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6795801B1 (en) * | 1999-08-13 | 2004-09-21 | Electric Power Research Institute, Inc. | Apparatus and method for analyzing anisotropic particle scattering in three-dimensional geometries |
| CN102732679A (en) * | 2012-06-18 | 2012-10-17 | 莱芜钢铁集团有限公司 | Composited desulfurizer for KR, preparation method and application thereof |
| CN106407740A (en) * | 2016-09-05 | 2017-02-15 | 南京大学 | Method for screening anti-androgen activity of flavonoid compounds based on molecular dynamics simulation |
| CN107398279A (en) * | 2017-08-17 | 2017-11-28 | 江苏天东新材料科技有限公司 | A kind of preparation method and application of efficient oxidation zinc desulfurizing agent |
-
2017
- 2017-12-11 CN CN201711309379.4A patent/CN108038307B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6795801B1 (en) * | 1999-08-13 | 2004-09-21 | Electric Power Research Institute, Inc. | Apparatus and method for analyzing anisotropic particle scattering in three-dimensional geometries |
| CN102732679A (en) * | 2012-06-18 | 2012-10-17 | 莱芜钢铁集团有限公司 | Composited desulfurizer for KR, preparation method and application thereof |
| CN106407740A (en) * | 2016-09-05 | 2017-02-15 | 南京大学 | Method for screening anti-androgen activity of flavonoid compounds based on molecular dynamics simulation |
| CN107398279A (en) * | 2017-08-17 | 2017-11-28 | 江苏天东新材料科技有限公司 | A kind of preparation method and application of efficient oxidation zinc desulfurizing agent |
Non-Patent Citations (3)
| Title |
|---|
| "KR预处理脱硫铁水流场数学模型及数值模拟研究";杨波;《中国优秀硕士学位论文全文数据库（电子期刊）工程科技Ⅰ辑》;20160615;B023-48 * |
| "Numerical study of flow field on molten iron desulfurization with mechanical stirring";Linwei Xiao等;《Advances in Mechanical Engineering》;20161023;page1-11 * |
| "铁水脱硫搅拌器结构分析及改进";但斌斌等;《现代制造工程》;20161231;第143-148页 * |
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