CN117171983A - Modeling simulation method and device for oxygen-enriched bottom-blowing smelting furnace based on key field coupling - Google Patents
Modeling simulation method and device for oxygen-enriched bottom-blowing smelting furnace based on key field coupling Download PDFInfo
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- 238000007664 blowing Methods 0.000 title claims abstract description 201
- 238000000034 method Methods 0.000 title claims abstract description 112
- 238000003723 Smelting Methods 0.000 title claims abstract description 87
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 239000001301 oxygen Substances 0.000 title claims abstract description 79
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 79
- 230000008878 coupling Effects 0.000 title claims abstract description 77
- 238000010168 coupling process Methods 0.000 title claims abstract description 77
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 77
- 238000004088 simulation Methods 0.000 title claims abstract description 54
- 238000004364 calculation method Methods 0.000 claims abstract description 121
- 230000008569 process Effects 0.000 claims abstract description 66
- 239000007789 gas Substances 0.000 claims description 151
- 239000007921 spray Substances 0.000 claims description 145
- 239000002893 slag Substances 0.000 claims description 76
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 claims description 58
- 239000002245 particle Substances 0.000 claims description 40
- 238000006243 chemical reaction Methods 0.000 claims description 39
- 230000033001 locomotion Effects 0.000 claims description 37
- 230000001052 transient effect Effects 0.000 claims description 32
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims description 25
- 239000012141 concentrate Substances 0.000 claims description 25
- 238000009826 distribution Methods 0.000 claims description 24
- 239000007787 solid Substances 0.000 claims description 22
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000010949 copper Substances 0.000 claims description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 230000001788 irregular Effects 0.000 claims description 11
- 238000004458 analytical method Methods 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 230000003993 interaction Effects 0.000 claims description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 5
- 238000011105 stabilization Methods 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 14
- 230000015654 memory Effects 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000001808 coupling effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000011112 process operation Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000342 Monte Carlo simulation Methods 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- HYXXTUOWDIJLPS-UHFFFAOYSA-N copper;sulfane Chemical compound S.[Cu+2] HYXXTUOWDIJLPS-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
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- 238000009776 industrial production Methods 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a modeling simulation method and device for an oxygen-enriched bottom-blowing smelting furnace based on key field coupling, and relates to the technical field of non-ferrous metal smelting process simulation. Comprising the following steps: decomposing the oxygen-enriched bottom-blowing smelting process into a plurality of links; extracting characteristics of each link in a plurality of links to obtain a key field of each link; and carrying out coupling calculation on key fields of each link to obtain an oxygen-enriched bottom-blowing smelting furnace modeling simulation result based on key field coupling. According to the invention, a complex oxygen-enriched bottom-blowing smelting process is decomposed into a plurality of links by adopting a modeling simulation method based on key field coupling, key fields are extracted according to the process characteristics of each link, non-key fields are simplified, a corresponding model is established, basic conditions are set, and key field coupling calculation is performed. The key fields of each link are extracted for coupling calculation, so that the solving difficulty can be reduced and the solving efficiency can be improved while the condition in the furnace is accurately simulated.
Description
Technical Field
The invention relates to the technical field of non-ferrous metal smelting process simulation, in particular to an oxygen-enriched bottom-blowing smelting furnace modeling simulation method and device based on key field coupling.
Background
The oxygen-enriched bottom-blowing smelting technology is a bath smelting technology which is independently researched and developed in China, is one of world advanced copper smelting technologies, has the technical characteristics of strong raw material adaptability, carbonless matte smelting, low oxygen consumption and the like, and is widely applied to smelting copper, tin and lead. The technology is that oxygen-enriched air is blown into a molten pool from the bottom of a furnace body through a spray gun, and the bubbles float upwards to drive the melt in the molten pool to circulate so as to accelerate the mass, momentum and energy transfer, so that the melt is uniformly stirred and the operation process of chemical reaction is rapidly carried out. The heat in the smelting process is fully utilized, and high-grade copper matte is produced. With the change of raw materials and the improvement of the yield, the problems of unstable furnace conditions, higher copper content in slag, larger fluctuation of slag components, serious corrosion of furnace lining and the like appear, and the reasons for loss of copper in slag, stirring of a molten pool in the furnace and smelting conditions are not clear, so that the normal operation of industrial production is influenced. The oxygen-enriched bottom blowing furnace is internally provided with a complex multiphase chemical reaction system, and in the smelting process, the inside of a molten pool is in a strongly stirred environment, so that the interfacial reaction of gas and liquid, the oxygen content distribution, the melt temperature and the like have important influences on production indexes such as gas utilization rate, slag making efficiency, matte grade, furnace life and the like. The automation level of the oxygen-enriched bottom-blowing smelting process is low, and parameters such as temperature in the furnace, physical and chemical reactions, gas-slag sulfonium distribution, copper sulfonium grade and the like are difficult to accurately quantitatively characterize due to the high-temperature environment in the furnace, so that the optimized operation of copper smelting production cannot be effectively ensured. Therefore, advanced technical means are needed to grasp the production condition in the furnace and guide the actual production operation.
Numerical simulation calculation is earlier in foreign start, and scientific researchers begin to reflect physical processes and chemical reactions which are difficult to monitor in a metallurgical furnace in actual production through a numerical simulation method in the 60-70 th century. With the development of disciplines such as computational fluid dynamics, computational heat and mass transfer science, computational combustion science and the like, the research of industrial furnace reaction engineering is more and more practical and further gradually perfected. The oxygen bottom-blowing smelting process involves multiphase flow, heat and momentum transfer, complex chemical changes, etc. to describe the process more accurately and provide guidance for production, common mathematical models include multiphase flow models, turbulence models, component transfer models, heat transfer control models, etc. The oxygen-enriched bottom blowing smelting is a multiphase flow and transmission process which relates to a complex system of concentrate particles, oxygen-enriched air, sulfonium and slag, and the current software and hardware conditions can not simultaneously meet the requirements of high-precision and high-efficiency simulation calculation on the process. The method can theoretically calculate through a complete multi-field coupling model, but has huge consumed calculation resources, greatly reduces the convergence of a calculation result, and is suitable for calculating by adopting a coupling control equation for analyzing a multiphase reaction flow field, a thermal field and a component field in the oxygen-enriched bottom blowing smelting process. However, the current modeling simulation has few researches on the processes of smelting reaction in a furnace, component diffusion, particle movement and the like, and few results capable of guiding practical production are provided.
Disclosure of Invention
The invention provides the method for solving the problems of complex model, difficult convergence and long calculation time consumption in the modeling simulation of the multi-field intensity coupling system.
In order to solve the technical problems, the invention provides the following technical scheme:
in one aspect, the invention provides an oxygen-enriched bottom-blown smelting furnace modeling simulation method based on key field coupling, which is realized by electronic equipment and comprises the following steps:
s1, decomposing the oxygen-enriched bottom-blowing smelting process into a plurality of links.
And S2, extracting the characteristics of each link in the plurality of links to obtain a key field of each link.
And S3, performing coupling calculation on key fields of each link to obtain an oxygen-enriched bottom-blowing smelting furnace modeling simulation result based on key field coupling.
Optionally, the plurality of links in S1 include: the method comprises a blowing step of compressible gas in a spray gun, a step of multiphase movement of gas, sulfonium and slag in a bottom blowing furnace, a step of mixing bottom blowing Cheng Luliao, a step of heterogeneous reaction of bottom blowing sulfonium making and slag making, a step of feeding concentrate particles in the bottom blowing furnace and a step of growing solid mushroom heads at the bottom blowing spray gun.
Optionally, the key fields of the injection link of the compressible gas in the spray gun in S2 include: a single-phase flow field of the injected gas in each of the plurality of lance sets and a temperature field in the lance.
The key fields of the multi-phase motion link of the gas sulfonium slag in the bottom blowing furnace comprise: a gas sulfonium slag multiphase flow field.
Key fields of the bottom blowing Cheng Luliao mixing link include: a gas sulfonium slag multiphase flow field and component fields in each phase.
Key fields of the heterogeneous reaction link of the bottom blowing sulfonium making and slag making include: a component field of heterogeneous reaction of gas-sulfonium slag multiphase flow field.
The key fields of the bottom blowing furnace concentrate particle feeding link comprise: a gas sulfonium slag multiphase flow field and a particle playground.
The key fields of the growth links of the solid mushroom heads at the bottom blowing spray gun comprise: the growth process of irregular loose porous medium generated by the spray gun end head and the flow field after stabilization.
Optionally, the step S3 of performing coupling calculation on the key field of the injection link of the compressible gas in the spray gun includes:
the single-phase flow field of the compressible gas in the spray gun is adopted for calculation, the wall surface of the spray gun is given with a temperature boundary condition, the gas inlet is a pressure inlet boundary condition, the gas outlet is a pressure outlet boundary condition, and a bottom blowing spray gun model is established.
Equation residual converged to 10 using steady state calculation -4 ～10 -5 The variation to the calculated result is not more than + -1%.
Or, using transient calculation, the time step is set to 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 The variation to the calculated result is not more than + -1%.
And calculating to obtain the speed at the outlet of the spray gun, the density and the viscosity of the gas at the outlet of the spray gun.
Optionally, the key field of the multi-phase motion link of the gas matte slag in the bottom blowing furnace in the step S3 is subjected to coupling calculation, and the method comprises the following steps:
establishing a region model of a bottom blowing furnace molten pool according to the wall surface of the furnace body of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun; simplifying the area of the spray gun into a square section according to the equivalent area of the section; and the section of the spray gun inlet adopts a speed inlet boundary, and the speed at the spray gun outlet and the density and viscosity of the gas at the spray gun outlet, which are obtained by calculating the spraying link of the compressible gas in the spray gun, are equivalently converted to obtain the speed at the spray gun outlet and the density and viscosity of the gas at the spray gun outlet in the multi-phase motion link of the gas, the sulfonium and the slag in the bottom blowing furnace.
Multiphase flow field calculation is carried out by adopting a fluid volume model VOF, transient calculation is adopted, and the time step is set to be 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 。
Optionally, the coupling calculation is performed by the key field of the bottom blowing Cheng Luliao hybrid link in S3, including:
and establishing a region model of the bottom blowing furnace molten pool according to the wall surface of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun.
And obtaining an average field according to the average value of the speeds, phase distribution, turbulent kinetic energy and turbulent dissipation rate in three orthogonal directions, which are obtained by calculating in the multi-phase motion link of the gas, sulfonium and slag in the bottom blowing furnace, under the preset statistical time.
Taking the average field as a transient flow field in a molten pool, selecting any position in the molten pool, adding a component with preset concentration, and solving a concentration diffusion equation of the component under the average field.
With transient calculation, the time step is set to 10 -1 ～10 2 s, equation residual converged to 10 -4 ～10 -5 。
Optionally, the key field of the step S3 of the heterogeneous reaction of bottom blowing sulfonium slagging is coupled and calculated, which comprises the following steps:
and establishing a region model of the bottom blowing furnace molten pool according to the wall surface of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun.
And obtaining an average field according to the average value of the speeds, phase distribution, turbulent kinetic energy and turbulent dissipation rate in three orthogonal directions, which are obtained by calculating in the multi-phase motion link of the gas, sulfonium and slag in the bottom blowing furnace, under the preset statistical time.
And establishing a kinetic equation of the reaction between different phases in the smelting process, and calculating a component equation and an energy equation.
With transient calculation, the time step is set to 10 -3 ～10 -1 s, equation residual converged to 10 -4 ～10 -5 。
Optionally, the key field of the bottom blowing furnace concentrate particle feeding link in S3 performs coupling calculation, including:
and (3) performing simulation analysis on the interaction between the gas and the melt and the copper ore particles after the solid copper concentrate is put into the furnace by adopting an EDEM-Fluent bidirectional coupling calculation method.
Optionally, performing coupling calculation on key fields of a growth link of the solid mushroom head at the bottom blowing spray gun in the step S3, including:
the single-phase flow field of the compressible gas in the spray gun is adopted for calculation, the wall surface of the spray gun is given with a temperature boundary condition, the gas inlet is a pressure inlet boundary condition, the gas outlet is a pressure outlet boundary condition, and a bottom blowing spray gun model is established.
The geometric shape of the irregular loose porous medium generated by the spray gun end is simplified into a cuboid, the middle part of the loose porous medium is set as a gas channel, and the surrounding grids of the loose porous medium are encrypted.
On the other hand, the invention provides an oxygen-enriched bottom-blowing smelting furnace modeling simulation device based on key field coupling, which is applied to realizing an oxygen-enriched bottom-blowing smelting furnace modeling simulation method based on key field coupling, and comprises the following steps:
the decomposing module is used for decomposing the oxygen-enriched bottom-blowing smelting process into a plurality of links.
And the feature extraction module is used for extracting features of each link in the plurality of links to obtain a key field of each link.
And the output module is used for carrying out coupling calculation on the key fields of each link to obtain an oxygen-enriched bottom-blowing smelting furnace modeling simulation result based on the coupling of the key fields.
Optionally, the plurality of links includes: the method comprises a blowing step of compressible gas in a spray gun, a step of multiphase movement of gas, sulfonium and slag in a bottom blowing furnace, a step of mixing bottom blowing Cheng Luliao, a step of heterogeneous reaction of bottom blowing sulfonium making and slag making, a step of feeding concentrate particles in the bottom blowing furnace and a step of growing solid mushroom heads at the bottom blowing spray gun.
Optionally, the key fields of the injection link of the compressible gas in the spray gun include: a single-phase flow field of the injected gas in each of the plurality of lance sets and a temperature field in the lance.
The key fields of the multi-phase motion link of the gas sulfonium slag in the bottom blowing furnace comprise: a gas sulfonium slag multiphase flow field.
Key fields of the bottom blowing Cheng Luliao mixing link include: a gas sulfonium slag multiphase flow field and component fields in each phase.
Key fields of the heterogeneous reaction link of the bottom blowing sulfonium making and slag making include: a component field of heterogeneous reaction of gas-sulfonium slag multiphase flow field.
The key fields of the bottom blowing furnace concentrate particle feeding link comprise: a gas sulfonium slag multiphase flow field and a particle playground.
The key fields of the growth links of the solid mushroom heads at the bottom blowing spray gun comprise: the growth process of irregular loose porous medium generated by the spray gun end head and the flow field after stabilization.
Optionally, the output module is further configured to:
the single-phase flow field of the compressible gas in the spray gun is adopted for calculation, the wall surface of the spray gun is given with a temperature boundary condition, the gas inlet is a pressure inlet boundary condition, the gas outlet is a pressure outlet boundary condition, and a bottom blowing spray gun model is established.
Equation residual converged to 10 using steady state calculation -4 ～10 -5 The variation to the calculated result is not more than + -1%.
Or, using transient calculation, the time step is set to 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 The variation to the calculated result is not more than + -1%.
And calculating to obtain the speed at the outlet of the spray gun, the density and the viscosity of the gas at the outlet of the spray gun.
Optionally, the output module is further configured to:
establishing a region model of a bottom blowing furnace molten pool according to the wall surface of the furnace body of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun; simplifying the area of the spray gun into a square section according to the equivalent area of the section; and the section of the spray gun inlet adopts a speed inlet boundary, and the speed at the spray gun outlet and the density and viscosity of the gas at the spray gun outlet, which are obtained by calculating the spraying link of the compressible gas in the spray gun, are equivalently converted to obtain the speed at the spray gun outlet and the density and viscosity of the gas at the spray gun outlet in the multi-phase motion link of the gas, the sulfonium and the slag in the bottom blowing furnace.
Multiphase flow field calculation is carried out by adopting a fluid volume model VOF, transient calculation is adopted, and the time step is set to be 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 。
Optionally, the output module is further configured to:
and establishing a region model of the bottom blowing furnace molten pool according to the wall surface of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun.
And obtaining an average field according to the average value of the speeds, phase distribution, turbulent kinetic energy and turbulent dissipation rate in three orthogonal directions, which are obtained by calculating in the multi-phase motion link of the gas, sulfonium and slag in the bottom blowing furnace, under the preset statistical time.
Taking the average field as a transient flow field in a molten pool, selecting any position in the molten pool, adding a component with preset concentration, and solving a concentration diffusion equation of the component under the average field.
With transient calculation, the time step is set to 10 -1 ～10 2 s, equation residual converged to 10 -4 ～10 -5 。
Optionally, the output module is further configured to:
and establishing a region model of the bottom blowing furnace molten pool according to the wall surface of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun.
And obtaining an average field according to the average value of the speeds, phase distribution, turbulent kinetic energy and turbulent dissipation rate in three orthogonal directions, which are obtained by calculating in the multi-phase motion link of the gas, sulfonium and slag in the bottom blowing furnace, under the preset statistical time.
And establishing a kinetic equation of the reaction between different phases in the smelting process, and calculating a component equation and an energy equation.
With transient calculation, the time step is set to 10 -3 ～10 -1 s, equation residual converged to 10 -4 ～10 -5 。
Optionally, the output module is further configured to:
and (3) performing simulation analysis on the interaction between the gas and the melt and the copper ore particles after the solid copper concentrate is put into the furnace by adopting an EDEM-Fluent bidirectional coupling calculation method.
Optionally, the output module is further configured to:
the single-phase flow field of the compressible gas in the spray gun is adopted for calculation, the wall surface of the spray gun is given with a temperature boundary condition, the gas inlet is a pressure inlet boundary condition, the gas outlet is a pressure outlet boundary condition, and a bottom blowing spray gun model is established.
The geometric shape of the irregular loose porous medium generated by the spray gun end is simplified into a cuboid, the middle part of the loose porous medium is set as a gas channel, and the surrounding grids of the loose porous medium are encrypted.
In one aspect, an electronic device is provided, the electronic device comprises a processor and a memory, at least one instruction is stored in the memory, and the at least one instruction is loaded and executed by the processor to realize the oxygen-enriched bottom-blown smelting furnace modeling simulation method based on key field coupling.
In one aspect, a computer readable storage medium is provided, wherein at least one instruction is stored in the storage medium, and the at least one instruction is loaded and executed by a processor to realize the oxygen-enriched bottom-blowing smelting furnace modeling simulation method based on key field coupling.
Compared with the prior art, the technical scheme has at least the following beneficial effects:
the scheme provides a relatively efficient and accurate modeling simulation method for accurately researching the oxygen-enriched bottom-blowing smelting process. According to the invention, the oxygen-enriched bottom-blowing smelting process is decomposed into six links, and key fields of the links are extracted, so that the complex and unknown multiphase field coupling action system in the furnace can be avoided in the simulation calculation process, and the modeling difficulty is reduced; by simplifying non-key fields, the convergence of calculation is improved, and the calculation efficiency is greatly improved by adopting a coupling calculation method corresponding to the key fields. According to the invention, through carrying out modeling simulation calculation research based on key field coupling on the oxygen-enriched bottom-blowing smelting process, a mathematical calculation model is established, and the law of the change of process parameters along with time can be quantitatively analyzed; the invention is helpful for grasping the production condition in the furnace, provides reference for practical production and provides basis for parameter control; the invention provides an adjusting direction for process operation and optimization, and improves the accuracy level of the oxygen-enriched bottom-blowing smelting process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow diagram of an oxygen-enriched bottom-blown smelting furnace modeling simulation method based on key field coupling provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a plurality of links provided by an embodiment of the present invention;
FIG. 3 is a block diagram of an oxygen-enriched bottom-blown smelting furnace modeling simulation device based on key field coupling provided by an embodiment of the invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
As shown in FIG. 1, the embodiment of the invention provides an oxygen-enriched bottom-blowing smelting furnace modeling simulation method based on key field coupling, which can be realized by electronic equipment. The process flow of the modeling simulation method of the oxygen-enriched bottom-blown smelting furnace based on the key field coupling as shown in fig. 1 can comprise the following steps:
s1, decomposing the oxygen-enriched bottom-blowing smelting process into a plurality of links.
As shown in fig. 2, the multiple links may include: the method comprises a blowing step of compressible gas in a spray gun, a step of multiphase movement of gas, sulfonium and slag in a bottom blowing furnace, a step of mixing bottom blowing Cheng Luliao, a step of heterogeneous reaction of bottom blowing sulfonium making and slag making, a step of feeding concentrate particles in the bottom blowing furnace and a step of growing solid mushroom heads at the bottom blowing spray gun.
And S2, extracting the characteristics of each link in the plurality of links to obtain a key field of each link.
The key fields of the injection link of the compressible gas in the spray gun can comprise: a single-phase flow field of the injected gas in each of the plurality of lance sets and a temperature field in the lance.
The key fields of the multi-phase motion link of the gas sulfonium slag in the bottom blowing furnace comprise: a gas sulfonium slag multiphase flow field.
Key fields of the bottom blowing Cheng Luliao mixing link include: a gas sulfonium slag multiphase flow field and component fields in each phase.
Key fields of the heterogeneous reaction link of the bottom blowing sulfonium making and slag making include: a component field of heterogeneous reaction of gas-sulfonium slag multiphase flow field.
The key fields of the bottom blowing furnace concentrate particle feeding link comprise: a gas sulfonium slag multiphase flow field and a particle playground.
The key fields of the growth links of the solid mushroom heads at the bottom blowing spray gun comprise: the growth process of irregular loose porous medium generated by the spray gun end head and the flow field after stabilization.
And S3, performing coupling calculation on key fields of each link to obtain an oxygen-enriched bottom-blowing smelting furnace modeling simulation result based on key field coupling.
Optionally, the step S3 of performing coupling calculation on the key field of the injection link of the compressible gas in the spray gun includes:
the single-phase flow field of the compressible gas in the spray gun is adopted for calculation, the wall surface of the spray gun is given with a temperature boundary condition, the gas inlet is a pressure inlet boundary condition, the gas outlet is a pressure outlet boundary condition, and a bottom blowing spray gun model is established.
Equation residual converged to 10 using steady state calculation -4 ～10 -5 The variation to the calculated result is not more than + -1%.
Or, using transient calculation, the time step is set to 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 The variation to the calculated result is not more than + -1%.
And calculating to obtain the speed at the outlet of the spray gun, the density and the viscosity of the gas at the outlet of the spray gun.
In a possible implementation, the links(1) And (3) a spraying link of compressible gas in the spray gun: the method comprises the steps of establishing a bottom blowing spray gun model aiming at the process, considering the stability of calculation convergence, and properly reducing the number of grids for improving the quality of the grid model. The single-phase flow field calculation of compressible gas is adopted, the temperature boundary condition is set on the wall surface of the spray gun, the pressure inlet boundary condition is adopted for the gas inlet, and the pressure outlet boundary condition is adopted for the gas outlet. All residuals converge to 10 using steady state calculations -4 ～10 -5 The method comprises the steps of carrying out a first treatment on the surface of the Transient calculations can also be used, with time steps of 10 -3 ～10 -4 s, all residuals converge to 10 -3 ～10 -4 The method comprises the steps of carrying out a first treatment on the surface of the Steady state and transient calculations are performed until the final result does not vary by more than + -1%. By the method, the spray gun outlet speed and speed vector distribution results and the density and viscosity distribution results of the spray gun outlet gas under the conditions of different spray gun diameters, spray gun spray hole structures, spray gun end pressure, air inlet quantity, gas spraying angles and the like can be obtained.
Optionally, the key field of the multi-phase motion link of the gas matte slag in the bottom blowing furnace in the step S3 is subjected to coupling calculation, and the method comprises the following steps:
establishing a region model of a bottom blowing furnace molten pool according to the wall surface of the furnace body of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun; simplifying the area of the spray gun into a square section according to the equivalent area of the section; and the section of the spray gun inlet adopts a speed inlet boundary, and the speed at the spray gun outlet and the density and viscosity of the gas at the spray gun outlet, which are obtained by calculating the spraying link of the compressible gas in the spray gun, are equivalently converted to obtain the speed at the spray gun outlet and the density and viscosity of the gas at the spray gun outlet in the multi-phase motion link of the gas, the sulfonium and the slag in the bottom blowing furnace.
Multiphase flow field calculation is carried out by adopting a fluid volume model VOF, transient calculation is adopted, and the time step is set to be 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 。
In a feasible implementation mode, the step (2) is a multi-phase motion ring of gas, sulfonium and slag in the bottom blowing furnaceSection: the gas-sulfonium-slag multiphase motion in the bottom blowing process furnace is realized. Aiming at the process, the concentrate feeding process, the smoke discharging structure, the furnace body characteristics of slag discharging and matte discharging ports on two sides of the furnace body are ignored, the thickness of a refractory layer of the furnace body is ignored, only a model of the area where a bottom blowing furnace molten pool is located is built, and the model comprises the wall surface of the furnace body and the structure of the molten pool in the furnace, the spray gun model is simplified, and only the section of a gas inlet of the spray gun is reserved. The area of the oxygen lance in the original furnace is simplified into a square section according to the equivalent area of the section. Calculating multiphase flow fields by adopting VOF non-compressible multiphase flow, and considering surface interfacial tension between gas and sulfonium slag; the section of the spray gun inlet adopts a speed inlet boundary, and the speed at the spray gun outlet, the density and the viscosity of the gas are obtained based on the equivalent transformation of the calculation result of the step (1). With transient calculation, the time step is 10 -3 ～10 -4 s, all residuals converge to 10 -3 ～10 -4 The method comprises the steps of carrying out a first treatment on the surface of the The above calculation can be used to obtain the variation results of different injection parameters, gas-matte-slag dosage ratio, liquid level height, in-furnace speed field, turbulent flow field and gas-matte-slag phase field distribution on injection time.
Optionally, the coupling calculation is performed by the key field of the bottom blowing Cheng Luliao hybrid link in S3, including:
and establishing a region model of the bottom blowing furnace molten pool according to the wall surface of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun.
And obtaining an average field according to the average value of the speeds, phase distribution, turbulent kinetic energy and turbulent dissipation rate in three orthogonal directions, which are obtained by calculating in the multi-phase motion link of the gas, sulfonium and slag in the bottom blowing furnace, under the preset statistical time.
Taking the average field as a transient flow field in a molten pool, selecting any position in the molten pool, adding a component with preset concentration, and solving a concentration diffusion equation of the component under the average field.
With transient calculation, the time step is set to 10 -1 ～10 2 s, equation residual converged to 10 -4 ～10 -5 。
In one possible embodiment, the step (3) of bottom blowing Cheng Luliao is a step of mixing the components of the blowing process. The process involves gas-matte in a bathThe coupling between the slag multiphase flow field and the component fields in each phase adopts the same model as the link (2). Firstly, calculating the average value of the speeds, phase distribution, turbulence kinetic energy and turbulence dissipation rates in three orthogonal directions in the step (2) under the statistical time to obtain an average field, modifying a transient flow field in a molten pool into the statistical average flow field, then adding a component with a certain concentration into a certain position in the molten pool, closing the calculation of a flow field equation (a continuous equation, a momentum equation and a turbulence equation), and solving a concentration diffusion equation of the component only under the average flow field; with transient calculation, the time step is 10 -1 ～10 2 s, all residuals converge to 10 -4 ～10 -5 The method comprises the steps of carrying out a first treatment on the surface of the The diffusion and concentration distribution results of a certain component in the phase of the component under different blowing conditions can be obtained by adopting the calculation, so that the mixing time and the mixing result of different positions can be obtained.
Optionally, the key field of the step S3 of the heterogeneous reaction of bottom blowing sulfonium slagging is coupled and calculated, which comprises the following steps:
and establishing a region model of the bottom blowing furnace molten pool according to the wall surface of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun.
And obtaining an average field according to the average value of the speeds, phase distribution, turbulent kinetic energy and turbulent dissipation rate in three orthogonal directions, which are obtained by calculating in the multi-phase motion link of the gas, sulfonium and slag in the bottom blowing furnace, under the preset statistical time.
And establishing a kinetic equation of the reaction between different phases in the smelting process, and calculating a component equation and an energy equation.
With transient calculation, the time step is set to 10 -3 ～10 -1 s, equation residual converged to 10 -4 ～10 -5 。
In a possible implementation mode, the step (4) is a step of heterogeneous reaction of bottom blowing sulfonium making and slagging: aiming at the heterogeneous reaction of the injection through Cheng Fangre and the coupling between component fields of the heterogeneous reaction of the gas sulfonium slag multiphase flow field, aiming at the process, the built model and the link (3) are kept unchanged, and the average field is obtained through statistics. Establishing a kinetic equation of the reaction between different phases of the smelting process and taking the reaction into account Exothermic, flow field calculations are turned off, while the calculations of the composition equation and the energy equation are turned on. With transient calculation, the time step is 10 -3 ～10 -1 s, all residuals converge to 10 -4 ～10 -5 The method comprises the steps of carrying out a first treatment on the surface of the The concentration distribution, reaction rate, reaction heat release, furnace temperature and other distribution results of different reaction components under different blowing conditions can be obtained by adopting the calculation.
Optionally, the key field of the bottom blowing furnace concentrate particle feeding link in S3 performs coupling calculation, including:
and (3) performing simulation analysis on the interaction between the gas and the melt and the copper ore particles after the solid copper concentrate is put into the furnace by adopting an EDEM-Fluent bidirectional coupling calculation method.
In a possible implementation mode, the step (5) is a step of feeding concentrate particles in a bottom blowing furnace: the concentrate particle feeding relates to the coupling between a gas-sulfonium slag multiphase flow field and a particle motion field, and simulation analysis is carried out on the interaction between gas-melt-copper ore particles and the particle motion process after solid copper concentrate is put into a furnace by adopting an EDEM-Fluent bidirectional coupling calculation method. Copper ore particles fall from the chute at a velocity of 0m/s, the falling position being directly above the jet stream, typically calculated to a smelting time of 5 -10 s. And then, adopting a discrete element and VOF multiphase flow coupling calculation mode to carry out coupling solution on the gas sulfonium slag multiphase flow field and the particle motion field, adopting a discrete element modeling mode to calculate the concentrate particle motion, realizing coupling correlation between particles and fluid through drag force in a momentum equation, and adopting a Monte Carlo method to calculate the volume fraction of the particles. With transient calculations, the multiphase fluid time step is 10 -3 ～10 -4 s, all residuals converge to 10 -3 ～10 -4 The method comprises the steps of carrying out a first treatment on the surface of the The time step of particle calculation is 10 -5 ～10 -4 s, the fluid calculation time step is an integer multiple of the particle calculation time step. The calculation can be used for obtaining the movement and distribution results of particles in the gas-matte-slag multiphase flow field under different blowing conditions, and the pressure and stress distribution of the avoiding position of the spray gun can be obtained.
Optionally, performing coupling calculation on key fields of a growth link of the solid mushroom head at the bottom blowing spray gun in the step S3, including:
the single-phase flow field of the compressible gas in the spray gun is adopted for calculation, the wall surface of the spray gun is given with a temperature boundary condition, the gas inlet is a pressure inlet boundary condition, the gas outlet is a pressure outlet boundary condition, and a bottom blowing spray gun model is established.
The geometric shape of the irregular loose porous medium generated by the spray gun end is simplified into a cuboid, the middle part of the loose porous medium is set as a gas channel, and the surrounding grids of the loose porous medium are encrypted.
In a possible implementation manner, the growth link of the solid mushroom head at the bottom blowing spray gun in the link (6): under the action of the temperature difference between the inside and the outside of the oxygen lance of the oxygen-enriched bottom blowing furnace, the end head of the oxygen lance can generate irregular loose porous medium, which is called as 'mushroom head'. The mushroom head of the spray gun can prevent the erosion of the oxygen gun, effectively control the growth of the spray gun, prolong the service life of the furnace lining and improve the flow field distribution. Aiming at the growth process of the solid mushroom head at the bottom blowing spray gun, the adopted model is the same as that of the step (1), the geometric shape of the mushroom head is reasonably simplified in the model, and although the shape and the structure of the mushroom head at the outlet of the oxygen gun are very complex, the geometric shape is difficult to determine, but a main flow outlet for gas spraying exists. Setting the mushroom head as a cuboid, setting the middle part of the mushroom head as a gas channel, and carrying out encryption treatment on grids nearby the mushroom head. Through the establishment of the model, the growth process of the bottom blowing mushroom head under various conditions and the flow field characteristics after the stable mushroom head is formed can be researched, and references are provided for the growth and control of the mushroom head.
In order to obtain accurate gas-liquid slag phase component distribution and flow field speed distribution in the furnace, quantitatively analyzing the blowing parameters in the furnace, directly researching the reaction in the furnace, and analyzing the smelting process by adopting a numerical simulation calculation method. In order to carry out simulation calculation on the oxygen-enriched bottom blowing smelting process with high precision and high efficiency by combining the current software and hardware conditions, the invention provides a modeling simulation method based on key field coupling, which carries out simulation analysis on the interaction among gas, melt and copper ore particles and the particle movement process after solid copper concentrate is put into a furnace, and extracts key fields of different links of the process. In order to improve calculation convergence and calculation efficiency, the invention simplifies non-key fields, thereby realizing high-efficiency and accurate analysis of key field information of different links and solving the problems of complex model, difficult convergence and long calculation time consumption encountered by modeling simulation of a multi-field intensity coupling system. Therefore, the high-efficiency and accurate analysis of key field information of different links is realized, and the actual production is controlled efficiently and accurately.
In the embodiment of the invention, a relatively efficient and accurate modeling simulation method is provided for accurately researching the oxygen-enriched bottom-blowing smelting process. According to the invention, the oxygen-enriched bottom-blowing smelting process is decomposed into six links, and key fields of the links are extracted, so that the complex and unknown multiphase field coupling action system in the furnace can be avoided in the simulation calculation process, and the modeling difficulty is reduced; by simplifying non-key fields, the convergence of calculation is improved, and the calculation efficiency is greatly improved by adopting a coupling calculation method corresponding to the key fields. According to the invention, through carrying out modeling simulation calculation research based on key field coupling on the oxygen-enriched bottom-blowing smelting process, a mathematical calculation model is established, and the law of the change of process parameters along with time can be quantitatively analyzed; the invention is helpful for grasping the production condition in the furnace, provides reference for practical production and provides basis for parameter control; the invention provides an adjusting direction for process operation and optimization, and improves the accuracy level of the oxygen-enriched bottom-blowing smelting process.
As shown in fig. 3, an embodiment of the present invention provides an oxygen-enriched bottom-blowing smelting furnace modeling simulation device 300 based on key field coupling, where the device 300 is applied to implement an oxygen-enriched bottom-blowing smelting furnace modeling simulation method based on key field coupling, and the device 300 includes:
the decomposition module 310 is configured to decompose the oxygen-enriched bottom-blown smelting process into a plurality of links.
The feature extraction module 320 is configured to perform feature extraction on each of the plurality of links to obtain a key field of each link.
And the output module 330 is used for carrying out coupling calculation on the key fields of each link to obtain an oxygen-enriched bottom-blowing smelting furnace modeling simulation result based on the coupling of the key fields.
Optionally, the plurality of links includes: the method comprises a blowing step of compressible gas in a spray gun, a step of multiphase movement of gas, sulfonium and slag in a bottom blowing furnace, a step of mixing bottom blowing Cheng Luliao, a step of heterogeneous reaction of bottom blowing sulfonium making and slag making, a step of feeding concentrate particles in the bottom blowing furnace and a step of growing solid mushroom heads at the bottom blowing spray gun.
Optionally, the key fields of the injection link of the compressible gas in the spray gun include: a single-phase flow field of the injected gas in each of the plurality of lance sets and a temperature field in the lance.
The key fields of the multi-phase motion link of the gas sulfonium slag in the bottom blowing furnace comprise: a gas sulfonium slag multiphase flow field.
Key fields of the bottom blowing Cheng Luliao mixing link include: a gas sulfonium slag multiphase flow field and component fields in each phase.
Key fields of the heterogeneous reaction link of the bottom blowing sulfonium making and slag making include: a component field of heterogeneous reaction of gas-sulfonium slag multiphase flow field.
The key fields of the bottom blowing furnace concentrate particle feeding link comprise: a gas sulfonium slag multiphase flow field and a particle playground.
The key fields of the growth links of the solid mushroom heads at the bottom blowing spray gun comprise: the growth process of irregular loose porous medium generated by the spray gun end head and the flow field after stabilization.
Optionally, the output module 330 is further configured to:
the single-phase flow field of the compressible gas in the spray gun is adopted for calculation, the wall surface of the spray gun is given with a temperature boundary condition, the gas inlet is a pressure inlet boundary condition, the gas outlet is a pressure outlet boundary condition, and a bottom blowing spray gun model is established.
Equation residual converged to 10 using steady state calculation -4 ～10 -5 The variation to the calculated result is not more than + -1%.
Or, using transient calculation, the time step is set to 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 The variation to the calculated result is not more than + -1%.
And calculating to obtain the speed at the outlet of the spray gun, the density and the viscosity of the gas at the outlet of the spray gun.
Optionally, the output module 330 is further configured to:
establishing a region model of a bottom blowing furnace molten pool according to the wall surface of the furnace body of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun; simplifying the area of the spray gun into a square section according to the equivalent area of the section; and the section of the spray gun inlet adopts a speed inlet boundary, and the speed at the spray gun outlet and the density and viscosity of the gas at the spray gun outlet, which are obtained by calculating the spraying link of the compressible gas in the spray gun, are equivalently converted to obtain the speed at the spray gun outlet and the density and viscosity of the gas at the spray gun outlet in the multi-phase motion link of the gas, the sulfonium and the slag in the bottom blowing furnace.
Multiphase flow field calculation is carried out by adopting a fluid volume model VOF, transient calculation is adopted, and the time step is set to be 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 。
Optionally, the output module 330 is further configured to:
and establishing a region model of the bottom blowing furnace molten pool according to the wall surface of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun.
And obtaining an average field according to the average value of the speeds, phase distribution, turbulent kinetic energy and turbulent dissipation rate in three orthogonal directions, which are obtained by calculating in the multi-phase motion link of the gas, sulfonium and slag in the bottom blowing furnace, under the preset statistical time.
Taking the average field as a transient flow field in a molten pool, selecting any position in the molten pool, adding a component with preset concentration, and solving a concentration diffusion equation of the component under the average field.
With transient calculation, the time step is set to 10 -1 ～10 2 s, equation residual converged to 10 -4 ～10 -5 。
Optionally, the output module 330 is further configured to:
and establishing a region model of the bottom blowing furnace molten pool according to the wall surface of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun.
And obtaining an average field according to the average value of the speeds, phase distribution, turbulent kinetic energy and turbulent dissipation rate in three orthogonal directions, which are obtained by calculating in the multi-phase motion link of the gas, sulfonium and slag in the bottom blowing furnace, under the preset statistical time.
And establishing a kinetic equation of the reaction between different phases in the smelting process, and calculating a component equation and an energy equation.
With transient calculation, the time step is set to 10 -3 ～10 -1 s, equation residual converged to 10 -4 ～10 -5 。
Optionally, the output module 330 is further configured to:
and (3) performing simulation analysis on the interaction between the gas and the melt and the copper ore particles after the solid copper concentrate is put into the furnace by adopting an EDEM-Fluent bidirectional coupling calculation method.
Optionally, the output module 330 is further configured to:
the single-phase flow field of the compressible gas in the spray gun is adopted for calculation, the wall surface of the spray gun is given with a temperature boundary condition, the gas inlet is a pressure inlet boundary condition, the gas outlet is a pressure outlet boundary condition, and a bottom blowing spray gun model is established.
The geometric shape of the irregular loose porous medium generated by the spray gun end is simplified into a cuboid, the middle part of the loose porous medium is set as a gas channel, and the surrounding grids of the loose porous medium are encrypted.
In the embodiment of the invention, a relatively efficient and accurate modeling simulation method is provided for accurately researching the oxygen-enriched bottom-blowing smelting process. According to the invention, the oxygen-enriched bottom-blowing smelting process is decomposed into six links, and key fields of the links are extracted, so that the complex and unknown multiphase field coupling action system in the furnace can be avoided in the simulation calculation process, and the modeling difficulty is reduced; by simplifying non-key fields, the convergence of calculation is improved, and the calculation efficiency is greatly improved by adopting a coupling calculation method corresponding to the key fields. According to the invention, through carrying out modeling simulation calculation research based on key field coupling on the oxygen-enriched bottom-blowing smelting process, a mathematical calculation model is established, and the law of the change of process parameters along with time can be quantitatively analyzed; the invention is helpful for grasping the production condition in the furnace, provides reference for practical production and provides basis for parameter control; the invention provides an adjusting direction for process operation and optimization, and improves the accuracy level of the oxygen-enriched bottom-blowing smelting process.
Fig. 4 is a schematic structural diagram of an electronic device 400 according to an embodiment of the present invention, where the electronic device 400 may have a relatively large difference due to different configurations or performances, and may include one or more processors (central processing units, CPU) 401 and one or more memories 402, where at least one instruction is stored in the memories 402, and the at least one instruction is loaded and executed by the processors 401 to implement the following method for modeling and simulating an oxygen-enriched bottom-blowing melting furnace based on key field coupling:
s1, decomposing the oxygen-enriched bottom-blowing smelting process into a plurality of links.
And S2, extracting the characteristics of each link in the plurality of links to obtain a key field of each link.
And S3, performing coupling calculation on key fields of each link to obtain an oxygen-enriched bottom-blowing smelting furnace modeling simulation result based on key field coupling.
In an exemplary embodiment, a computer readable storage medium, such as a memory comprising instructions executable by a processor in a terminal to perform the above-described key field coupling based oxygen-enriched bottom-blown smelting furnace modeling simulation method is also provided. For example, the computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program for instructing relevant hardware, where the program may be stored in a computer readable storage medium, and the storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The modeling simulation method for the oxygen-enriched bottom-blown smelting furnace based on the key field coupling is characterized by comprising the following steps of:
s1, decomposing an oxygen-enriched bottom-blowing smelting process into a plurality of links;
s2, extracting characteristics of each link in the plurality of links to obtain a key field of each link;
and S3, performing coupling calculation on the key fields of each link to obtain an oxygen-enriched bottom-blowing smelting furnace modeling simulation result based on the coupling of the key fields.
2. The method of claim 1, wherein the plurality of links in S1 comprises: the method comprises a blowing step of compressible gas in a spray gun, a step of multiphase movement of gas, sulfonium and slag in a bottom blowing furnace, a step of mixing bottom blowing Cheng Luliao, a step of heterogeneous reaction of bottom blowing sulfonium making and slag making, a step of feeding concentrate particles in the bottom blowing furnace and a step of growing solid mushroom heads at the bottom blowing spray gun.
3. The method according to claim 2, wherein the key field of the injection link of the compressible gas in the lance in S2 comprises: a single-phase flow field of the injection gas in each of the plurality of spray guns and a temperature field in the spray gun;
the key fields of the multi-phase motion link of the gas sulfonium slag in the bottom blowing furnace comprise: a gas sulfonium slag multiphase flow field;
key fields of the bottom blowing Cheng Luliao mixing link include: a gas sulfonium slag multiphase flow field and component fields in each phase;
key fields of the heterogeneous reaction link of the bottom blowing sulfonium making and slag making include: a heterogeneous reaction component field of the gas sulfonium slag multiphase flow field;
the key fields of the bottom blowing furnace concentrate particle feeding link comprise: a gas sulfonium slag multiphase flow field and a particle playground;
the key fields of the growth links of the solid mushroom heads at the bottom blowing spray gun comprise: the growth process of irregular loose porous medium generated by the spray gun end head and the flow field after stabilization.
4. The method according to claim 1, wherein the step S3 of performing coupling calculation on the key field of the injection link of the compressible gas in the spray gun includes:
calculating by adopting a single-phase flow field of compressible gas in a spray gun, setting a temperature boundary condition on the wall surface of the spray gun, adopting a pressure inlet boundary condition on a gas inlet, adopting a pressure outlet boundary condition on a gas outlet, and establishing a bottom blowing spray gun model;
Equation residual converged to 10 using steady state calculation -4 ～10 -5 Until the calculated result does not change by more than +/-1%;
or, using transient calculation, the time step is set to 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 Until the calculated result does not change by more than +/-1%;
and calculating to obtain the speed at the outlet of the spray gun, the density and the viscosity of the gas at the outlet of the spray gun.
5. The method of claim 1, wherein the step S3 of performing coupling calculation on the key field of the multi-phase motion link of the gas-matte slag in the bottom blowing furnace comprises:
establishing a region model of a bottom blowing furnace molten pool according to the wall surface of the furnace body of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun; simplifying the area of the spray gun into a square section according to the equivalent area of the section; the section of the spray gun inlet adopts a speed inlet boundary, and the speed at the spray gun outlet, the density and the viscosity of the gas at the spray gun outlet, which are obtained by calculating in the spraying link of the compressible gas in the spray gun, are equivalently converted to obtain the speed at the spray gun outlet, the density and the viscosity of the gas at the spray gun outlet in the multi-phase motion link of the gas sulfonium slag in the bottom blowing furnace;
multiphase flow field calculation is carried out by adopting a fluid volume model VOF, transient calculation is adopted, and the time step is set to be 10 -3 ～10 -4 s, equation residual converged to 10 -3 ～10 -4 。
6. The method of claim 1, wherein the step of performing coupling calculation on the key field of the bottom blowing Cheng Luliao hybrid link in S3 comprises:
establishing a region model of a bottom blowing furnace molten pool according to the wall surface of the furnace body of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun;
obtaining an average field according to the average value of the speed, the phase distribution, the turbulent kinetic energy and the turbulent dissipation rate in three orthogonal directions, which are obtained by calculation in the multi-phase motion link of the gas-matte slag in the bottom blowing furnace, under the preset statistical time;
taking the average field as a transient flow field in a molten pool, selecting any position in the molten pool, adding components with preset concentration, and solving a concentration diffusion equation of the components under the average field;
with transient calculation, the time step is set to 10 -1 ～10 2 s, equation residual converged to 10 -4 ～10 -5 。
7. The method of claim 1, wherein the step S3 of performing coupling calculation on the key field of the heterogeneous reaction link of bottom-blown matte slagging comprises:
establishing a region model of a bottom blowing furnace molten pool according to the wall surface of the furnace body of the oxygen-enriched bottom blowing smelting furnace, the structure of the molten pool in the bottom blowing furnace and the gas inlet section of the spray gun;
Obtaining an average field according to the average value of the speed, the phase distribution, the turbulent kinetic energy and the turbulent dissipation rate in three orthogonal directions, which are obtained by calculation in the multi-phase motion link of the gas-matte slag in the bottom blowing furnace, under the preset statistical time;
establishing a kinetic equation of the reaction between different phases in the smelting process, and calculating a component equation and an energy equation;
with transient calculation, the time step is set to 10 -3 ～10 -1 s, equation residual converged to 10 -4 ～10 -5 。
8. The method according to claim 1, wherein the step S3 of performing coupling calculation on the key field of the bottom-blowing furnace concentrate particle feeding link comprises:
and (3) performing simulation analysis on the interaction between the gas and the melt and the copper ore particles after the solid copper concentrate is put into the furnace by adopting an EDEM-Fluent bidirectional coupling calculation method.
9. The method according to claim 1, wherein the step of performing coupling calculation on the key field of the growth link of the solid mushroom head at the bottom blowing lance in S3 includes:
calculating by adopting a single-phase flow field of compressible gas in a spray gun, setting a temperature boundary condition on the wall surface of the spray gun, adopting a pressure inlet boundary condition on a gas inlet, adopting a pressure outlet boundary condition on a gas outlet, and establishing a bottom blowing spray gun model;
The geometric shape of the irregular loose porous medium generated by the spray gun end is simplified into a cuboid, the middle part of the loose porous medium is set as a gas channel, and the surrounding grids of the loose porous medium are encrypted.
10. An oxygen-enriched bottom-blown smelting furnace modeling simulation device based on key field coupling, which is characterized by comprising:
the decomposing module is used for decomposing the oxygen-enriched bottom-blowing smelting process into a plurality of links;
the feature extraction module is used for extracting features of each link in the plurality of links to obtain a key field of each link;
and the output module is used for carrying out coupling calculation on the key fields of each link to obtain an oxygen-enriched bottom-blowing smelting furnace modeling simulation result based on the coupling of the key fields.
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| CN117688819A (en) * | 2024-02-01 | 2024-03-12 | 北京科技大学 | Simulation method and simulation system for molten pool flow field of steelmaking converter under carbon-oxygen reaction effect |
| CN117688819B (en) * | 2024-02-01 | 2024-04-26 | 北京科技大学 | Simulation method and simulation system for molten pool flow field of steelmaking converter under carbon-oxygen reaction effect |
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