LU101971B1 - Experimental system and method for simulating full steelmaking process - Google Patents
Experimental system and method for simulating full steelmaking process Download PDFInfo
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- LU101971B1 LU101971B1 LU101971A LU101971A LU101971B1 LU 101971 B1 LU101971 B1 LU 101971B1 LU 101971 A LU101971 A LU 101971A LU 101971 A LU101971 A LU 101971A LU 101971 B1 LU101971 B1 LU 101971B1
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Abstract
The present application provides an experimental system and method for simulating a full steelmaking process, including a converter furnace/electric furnace steelmaking module, a ladle secondary refining module, a ladle pouring module, a tundish module, and a crystallizer module. The tundish module includes a glass container made of a transparent acrylic sheet, a water inlet pipe for adding water to the glass container, a water outlet pipe for discharging water from the glass container, a level sensor disposed in the glass container for measuring a liquid level in the glass container, and an electric flow control valve mounted on the water inlet pipe. The tundish module further includes a liquid level controller. The liquid level controller is used for receiving a measurement result from the level sensor and controlling the electric flow control valve according to the measurement result to control liquid level fluctuations in the glass container to be within ±0.5 mm.
Description
The present application relates to the field of ferrous metallurgy technology, and | particularly to an experimental system and method for simulating a full steelmaking process. | A steelmaking process is often accompanied by three typical transport phenomena, that is, | momentum transfer, heat transfer, and mass transfer.
The appropriate analysis and description | of a metallurgical transport process will facilitate to optimize a process design, improve a | control level, eliminate production faults and build a novel knowledge system, understand | engineering dynamics and improve the degrees of cooperation among logistic flows of working | procedures, conduct the environmental impact analysis and promote the development of green | metallurgy. . | A metallurgical process is typically characterized by high temperature, complexity, and | lack of visibility.
For a long time, a metallurgy worker cannot directly perform online | observation to obtain parameters such as the flow and transfer information of molten steel in a . metallurgical reactor.
With the rapid development of modern fluid mechanics and computer | technology, physical simulation and numerical emulation technologies for researching a high- | temperature metallurgical transfer process are formed.
As research progresses, physical . simulation and numerical emulation become one of the most effective methods for analyzing a | metallurgical process and is also an important tool for developing new technologies and new | products. | A technical problem to be resolved by the present application is to provide an experimental | system and method for simulating a full steelmaking process. . To resolve the foregoing technical problems, the present application provides an f experimental system for simulating a full steelmaking process, including a converter | furnace/electric furnace steelmaking module, a ladle secondary refining module, a ladle pouring | module, a tundish module, and a crystallizer module.
The tundish module includes a glass | container made of a transparent acrylic sheet, a water inlet pipe for adding water to the glass | container, a water outlet pipe for discharging water from the glass container, a level sensor disposed in the glass container for measuring a liquid level in the glass container, and an electric LU101971 | flow control valve mounted on the water inlet pipe. The tundish module further includes a liquid | level controller, and the liquid level controller is used for receiving a measurement result from | the level sensor and controlling the electric flow control valve according to the measurement | result to control liquid level fluctuations in the glass container to be within £0.5 mm. |, Preferably, the experimental system uses the principle of similitude to ensure that the . experiment and a full steelmaking process share geometric similarity and physical similarity, | the physical similarity is determined depending on that a model and a real system have equal | dimensionless Froude numbers and Reynolds numbers, physical quantities of the experimental . system include a fluid-flow velocity, a fluid flow, and a flow time, the modules of the | experimental system are designed and processed by using a uniform geometric similarity ratio, | fluid-flow parameters of upstream and downstream models are kept consistent, and flow | transport behavior is similar to the actual behavior. | Preferably, a stopper is further disposed in the glass container of the tundish module, a | lower end portion of the stopper is aligned with a water outlet of the glass container, the stopper | is vertically movable, to control a flow velocity of flow in the glass container, and the liquid | level controller is further used for controlling the stopper according to a measurement result | from the level sensor to move vertically. | Preferably, the tundish module further includes a water tank, a water outlet of the water | outlet pipe is in fluid communication with the water tank, and a digital flowmeter and a valve | are further mounted on the water outlet pipe. © Preferably, the water outlet pipe is further provided with an electrically conductive . electrode, and the tundish module further includes an electrical conductivity tester and a display | used for displaying a result measured by the electrical conductivity tester. | The present application further provides an experimental method for simulating a full . steelmaking process. The experimental system is used in the experimental method. 0 Preferably, the experimental method is performed based on a "stimulation-response" | method, the "stimulation-response" method includes inputting a stimulation signal at a fixed | position of the experimental system, measuring an output of the signal at another position to | obtain a response curve, and obtaining the residence time distribution of a fluid in a reactor | from the response curve, and the stimulation signal is implemented by using a tracer. .
Preferably, the tracer is a KCI solution or a KMnO4 solution and is added to the | experimental system in a pulse mode or a stepped manner. | In the experimental system for simulating a full steelmaking process of the present | application, by means of the research on the physical simulation of the system, system (101971 | optimization is performed on technical process parameters of reactors, the design of the | structural parameters of the reactors is optimized, an optimization result provides strong . technical support for on-site production, and unexpected technical effects are achieved. |
The simulation method developed in the present invention is based on the theory of | similarity in modern fluid mechanics, including geometric similarity and physical similarity.
A metallurgical reactor model to a particular scale is manufactured by using an acrylic sheet. | Room-temperature or heated water is used to simulate molten steel in a laboratory (the dynamic , viscosity of high-temperature molten steel at 1600°C is similar to that of room-temperature | water). A series of advanced testing technologies such as a Particle Image Velocimetry (PIV) | technology, liquid level fluctuations, a pressure sensor, electrical conductivity testing, and flow : field display are combined to systematically analyze a fluid flow, mixing, particle movement, È slag entrapment, and the like in a metallurgical reactor.
Finally, research results obtained | through physical simulation experiments are then scaled up to an industrial scale based on the ; principle of similitude to provide basic support for the optimized design of reactors, the | optimization of a production operation process system, and the like in an actual industrial | production process.
At present, the physical simulation technology may be applied to various | process stages in a steel production process, for example, the evaluation and analysis of a | blowing effect in a converter furnace/an electric furnace, the quantitative analysis of a refining | effect in secondary refining equipment (for example, Ruhrstahl Heraeus (RH), Ladle furnaces | (LF), and Composition Adjustment by Sealed Argon Bubbling-Oxygen Blowing (CAS-OB)), | the movement behavior of molten steel in different types of typical reactors (for example, a | ladle, a tundish, and a crystallizer) in a continuous casting process, and the evaluation and | analysis and optimization design of metallurgical functions. |
The simulation system has the following features: (1) Integrity.
In view of the limitations ; of researching problems by using a single mathematical and physical simulation platform, this | platform may perform precise emulation and simulation on all typical transfer processes in a | full steelmaking process, to comprehensively grasp factors that affect metallurgical effects and | product quality in a smelting procedure, to implement offline system analysis and optimization © of a metallurgical process. (2) Functionality.
The simulation platform may be used to | systematically research molten steel flow, heat transfer, mass transfer, and inclusion removal | processes in a steelmaking-refining-continuous casting process.
The results are closer to the | actual on-site results. (3) Advancement.
With the use of such a platform tool, a closed-loop . research and development system including problem collection on a production site, systematic .
research on an emulation platform, and actual verification by returning to the site may be | U101971 | formed, to ensure the effective combination of basic research and development and on-site | production. In addition, a basic experimental method for studying metallurgical transport | features may be provided for metallurgical engineering majors in colleges and universities. .
Specific implementations of the present application are disclosed in detail with reference | to the detailed description and the accompanying drawings below, indicating the manners in . which the principle of the present application can be used. It should be understood that the | scope of the implementations of the present application is not limited accordingly. The . implementations of the present application include various changes, modifications, and | equivalents within the scope of the spirit and articles of the appended claims. | The features described and/or shown for one implementation may be used in one or more . other implementations in the same manner or a similar manner, combined with features in other | implementations or used to replace features in other implementations. | It should be emphasized that the term "include/comprise” used herein specifies the E presence of stated features, integers, steps or components, but do not preclude the presence or | addition of one or more other features, integers, steps or components. | The accompanying drawings described herein are only used for description, but are not | intended to limit in any manner the scope disclosed by the present application. In addition, the | shapes, scale sizes, and the like of the parts in the drawings are merely exemplary, and are used ; to help understand the present application, but are not used to specifically limit the shapes and | scale sizes of the parts in the present application. In light of the teachings of the present | application, a person skilled in the art may choose various possible shapes and scale sizes | according to a specific case to implement the present application. .
FIG. 1 is a schematic diagram of a tundish module according to the present application. | Where: 1, glass container; 2, water inlet pipe; 3, electric flow control valve; 4, liquid level © controller; 5, stopper; 6, water outlet pipe; 7, electrical conductivity instrument; 8, electrical | conductivity tester; 9, display; 10, electrically conductive electrode; 11, level sensor; 12, digital | flowmeter; 14, water tank; and 15, valve. .
The technical solutions in the embodiments of the present application will be described | clearly and completely with reference to the accompanying drawings. Obviously, the described | implementations are only some implementations of the present application rather than all the LU101971 | implementations. All other implementations obtained by a person of ordinary skill in the art | based on the implementations of the present application without creative efforts fall within the É protection scope of the present application. .
It needs to be noted that when an element is referred to as being "disposed" on another | element, the element may be directly disposed on the other element or an intervening element | may also be present. When an element is referred to as being "connected" to another element, | the element may be directly connected to the other element or an intervening element may also . be present. The terms "vertical", "horizontal", "left", "right", and similar expressions used | herein are only intended for illustration, and do not represent a unique implementation. | Unless otherwise defined, the technical terms and scientific terms used herein have the | same meanings as how they are generally understood by a person skilled in the art to which the | present application pertains. The terms used herein in the specification of the present | application are merely used for describing specific implementations, but are not intended to Ë limit the present application. The term "and/or" used herein encompasses any and all possible © combinations of one or more of the associated listed items. | The present application provides an experimental system for simulating a full steelmaking | process. The experimental system includes a converter furnace/electric furnace steelmaking | module, a ladle secondary refining module, a ladle pouring module, a tundish module, and a | crystallizer module. As shown in FIG. 1, the tundish module includes a glass container 1 made | of a transparent acrylic sheet, a water inlet pipe 2 used for adding water to the glass container | 1, a water outlet pipe 6 used for discharging water from the glass container 1, a level sensor 11 | disposed in the glass container 1 for measuring a liquid level in the glass container 1, and an | electric flow control valve 3 mounted on the water inlet pipe 2. The tundish module further . includes a liquid level controller 4. The liquid level controller 4 is used for receiving a | measurement result from the level sensor 11 and controlling the electric flow control valve 3 | according to the measurement result , so that the liquid level fluctuations in the glass container | 1 are controlled to be within 0.5 mm. The experimental system uses the principle of similitude | to ensure that the experiment and a full steelmaking process share geometric similarity and . physical similarity. The physical similarity is determined depending on that a model and a real | system have equal dimensionless Froude numbers and Reynolds numbers. Physical quantities | of the experimental system include a fluid-flow velocity, a fluid flow, and a flow time. The | modules of the experimental system are designed and processed by using a uniform geometric | similarity ratio. Fluid-flow parameters of upstream and downstream models are kept consistent. .
Flow transport behavior is similar to the actual behavior. A stopper 5 is further disposed in the LU101971 | glass container 1 of the tundish module. A lower end portion of the stopper 5 is aligned with a | water outlet of the glass container 1. The stopper 5 is vertically movable to control a flow | velocity in the glass container 1. The liquid level controller 4 is further used for controlling the | stopper 5 to move vertically according to a result measured by the level sensor 11. The tundish | module further includes a water tank 14. A water outlet of the water outlet pipe 6 is in fluid | communication with the water tank 14. A digital flowmeter 12 and a valve 15 are further | mounted on the water outlet pipe 6. The water outlet pipe 6 is further provided with an | electrically conductive electrode 10. The tundish module further includes an electrical . conductivity tester 8 and a display 9 for displaying a result measured by the electrical | conductivity tester 8. .
The present application further provides an experimental method for simulating a full | steelmaking process. The experimental system is used in the experimental method. The | experimental method is performed based on a "stimulation-response” method, the "stimulation- | response" method includes inputting a stimulation signal at a fixed position of the experimental . system, measuring an output of the signal at another position to obtain a response curve, and . obtaining the residence time distribution of a fluid in a reactor from the response curve. The . stimulation signal is implemented by using a tracer. The tracer is a KCI solution or a KMnO4 A solution and is added to the experimental system in a pulse mode or a stepped manner. A In the present invention, by means of the research on the physical simulation of the system, | system optimization is performed on technical process parameters of reactors, the design of the . structural parameters of the reactors is optimized, an optimization result provides strong | technical support for on-site production, and unexpected technical effects are achieved. | (1) The research that may be conducted by the steelmaking module includes: the | simulation of a bottom blowing process for an electric arc furnace/converter furnace and the . research on a stirring mechanism, to determine the optimal bottom blowing position, the flow | of a bottom blowing gas and the optimized design of a bottom blowing component; research | on the stirring characteristic of a furnace wall oxygen lance (a coherent jet oxygen lance), to | guide the design of parameters of the oxygen lance and the optimization of a blowing process; | and the analysis and research of fluid-flow states in the converter furnace/electric furnace. | (2) The ladle secondary refining module is mainly used for: research on a ladle bottom blowing process, in which simulation and research are performed on parameters such as the . size, mounting position, and bottom blowing flow of a ladle bottom blowing component, to . provide technical support for the optimization of the bottom blowing process; research on the .
impact of the ladle bottom blowing process on a removal effect of nonmetal inclusions in | J101971 | molten steel; and research on the optimization of the structure of ladle linings. | (3) The continuous casting tundish module may be used for: research on the control and | optimization of a tundish flow state in a stable state and an unstable state (a ladle changing | process); research on the optimization of the structural design and arrangement position of a | tundish flow control device (including a diversion dam, a weir for tundish, a turbulence | controller, a gas curtain, and the like); and research on the temperature distribution of the fluid | in the tundish and the thermal insulation effect of a surface-layer covering agent. | (4) The continuous casting crystallizer module is mainly used for: research on flow field | analysis and flow state control of a crystallizer; research on the optimization of an immersed | nozzle structure (the length, inner diameter, outlet angle, and the like) and an operation process | (an insertion depth); research on a flow field and an inclusion removal effect of nozzle argon | blowing; and research on slag entrapment behavior and a formation mechanism in the | crystallizer. .
The research method and the experimental system are used for systematically researching | a steelmaking-continuous casting process, so that an effective research method and experiment . method can be provided for process optimization on a steelmaking site and the presentation of | metallurgical technical process for students of metallurgical engineering majors in colleges and | universities. .
Embodiment 1 | An electric furnace in a steel plant has an inadequate side blowing process. After on-site | process parameters are confirmed, an acrylic model with a structure similar to that of the actual | electric furnace is built for the electric furnace. The model has a wall thickness of 30 mm. The © model similarity ratio is 1:3. The experiment emphatically researches the impact of a novel | bottom blowing process on a smelting effect. After systematic research, a bottom blowing form | with three holes at 120° from each other in the bottom is determined. When the bottom blowing | component is disposed at the 1/2 position in the radial direction at the furnace bottom, the | smelting efficiency of the electric furnace can be effectively improved. The smelting time is | reduced by up to 30%. The smelting efficiency is significantly improved. The results of the | simulation experiment have been successfully applied to on-site industrial practice. .
Embodiment 2 |
A quantity of large nonmetal inclusions (with the diameter greater than 50 pm) in a LU101971 : continuous casting slab in a steel plant exceeds the limit.
The optimization of existing tundish ; and crystallizer processes need to be researched on site.
Therefore, a tundish and a crystallizer | on site are used as objects.
Acrylic that is 35 mm thick is used to build experimental models of | the transparent tundish and the crystallizer.
The model scales are both 1:2. In addition, an | automatic liquid level control system is separately configured for the tundsssish and the . crystallizer.
The tundish model emphatically researches the sizes and positions of a turbulence | controller, a weir for tundish and a diversion dam.
A "stimulation-response" technology is used . to obtain fluid residence time curves in different operating conditions.
The optimal size and | position parameters of a flow control device are selected based on a curve analysis result.
The . erystallizer emphatically compares parameters such as the outlet structure and the insertion | depth of an immersed nozzle.
Liquid level fluctuations and slag entrapment behavior features | are analyzed to obtain the optimal nozzle adjustment process.
The optimization result is scaled | up to the industrial level and applied to the industrial practice.
Through quantitative analysis of | inclusions in a casting slab, it is determined that the physical simulation solution can | significantly reduce the content of large particle nonmetal inclusions.
The practice indicates | that the content of large inclusions in a casting slab after optimization is reduced by more than | 75%. A flaw detection qualification rate of casting slabs is increased by more than 80%. |
It needs to be noted that in the description of the present application, "a plurality of" herein | means "two or more" unless otherwise described. |
The disclosures of all articles and reference, including patent applications and | publications, if any, are incorporated herein by reference for all purposes.
The term | "substantially consists of... " which describes a combination should include the determined | elements, components, parts or steps, as well as other elements, components, parts or steps that | substantially do not affect the basic novel features of the combination.
The use of the term | "include" or "comprise" to describe the combination of the elements, components, parts or steps | herein also takes into account the implementations substantially constructed by these elements, | components, parts or steps.
Here, by using the term "may", it is intended to explain that any | described attribute included by "may" is optional. |
A plurality of elements, components, parts or steps can be provided by a single integrated | element, component, part or step.
Alternatively, a single integrated element, component, part or | step can be divided into a plurality of separate elements, components, parts or steps.
The terms | "a" or "one" used to describe the elements, components, parts or steps are not intended to | exclude other elements, components, parts or steps. |
It should be understood that the above description is for graphic illustration rather than LU101971 | limitation.
By reading the above description, many embodiments and applications other than | the disclosed examples would be obvious for a person skilled in the art.
Therefore, the scope of | the teaching shouldn’t be determined with reference to the above description, but rather by | reference to the appended claims, along with the full scope of equivalents possessed by the | claims.
The disclosures of all articles and references, including patent applications and | publications, are incorporated herein by reference for purpose of being comprehensive.
The | omission in the foregoing claims of any aspect of the subject matter disclosed herein is not | intended to disclaim such subject matter, nor should it be regarded that the inventor did not © consider such subject matter to be part of the disclosed inventive subject matter. |
Claims (8)
1. An experimental system for simulating a full steelmaking process, comprising a converter furnace/electric furnace steelmaking module, a ladle secondary refining module, a ladle pouring module, a tundish module, and a crystallizer module, wherein the tundish module comprises a glass container made of a transparent acrylic sheet, a water inlet pipe for adding water to the glass container, a water outlet pipe for discharging water from the glass container, a level sensor disposed in the glass container for measuring a liquid level in the glass container, and an electric flow control valve mounted on the water inlet pipe; and the tundish module further comprises a liquid level controller, and the liquid level controller is used for receiving a measurement result from the level sensor and controlling the electric flow control valve according to the measurement result to control liquid level fluctuations in the glass container to be within £0.5 mm.
2. The experimental system for simulating a full steelmaking process according to claim 1, wherein the experimental system uses the principle of similitude so that the experimental system and a full steelmaking process share geometric similarity and physical similarity, the physical similarity is determined depending on that a model and a real system have equal dimensionless Froude numbers and Reynolds numbers, physical quantities of the experimental system comprise a fluid-flow velocity, a fluid flow, and a flow time, the modules of the experimental system are designed and processed by using a uniform geometric similarity ratio, fluid-flow parameters of an upstream model and a downstream model are kept consistent, and flow transport behavior is similar to the actual behavior .
3. The experimental system for simulating a full steelmaking process according to claim 1, wherein a stopper is further disposed in the glass container of the tundish module, a lower end portion of the stopper is aligned with a water outlet of the glass container, the stopper is vertically movable, to control a flow velocity of flow in the glass container, and the liquid level controller is further used for controlling the stopper according to a measurement result from the level sensor to move vertically.
4. The experimental system for simulating a full steelmaking process according to claim 1, wherein the tundish module further comprises a water tank, a water outlet of the water outlet pipe is in fluid communication with the water tank, and a digital flowmeter and a valve are | further mounted on the water outlet pipe.
5. The experimental system for simulating a full steelmaking process according to claim | 4, wherein the water outlet pipe is further provided with an electrically conductive electrode,
and the tundish module further comprises an electrical conductivity tester and a display used | 101971 | for displaying a result measured by the electrical conductivity tester. |
6. An experimental method for simulating a full steelmaking process, wherein the | experimental system according to any one of claims 1 to 5 is used in the experimental method. /
7. The experimental method for simulating a full steelmaking process according to claim | 6, wherein the experimental method is performed based on a "stimulation-response” method, | the "stimulation-response” method comprises inputting a stimulation signal at a fixed position | of the experimental system, measuring an output of the signal at another position to obtain a | response curve, and obtaining the residence time distribution of a fluid in a reactor from the | response curve, and wherein the stimulation signal is implemented by using a tracer. |
8. The experimental method for simulating a full steelmaking process according to claim | 7, wherein the tracer is a KCl solution or a KMnO4 solution, and is added to the experimental | system in a pulse mode or a stepped manner. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911044997.XA CN110751893A (en) | 2019-10-30 | 2019-10-30 | Steelmaking full-flow simulation experiment system and method |
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| LU101971B1 true LU101971B1 (en) | 2021-02-10 |
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| LU (1) | LU101971B1 (en) |
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| SU1088055A1 (en) * | 1983-02-24 | 1984-04-23 | Сибирский Ордена Трудового Красного Знамени Металлургический Институт Им.С.Орджоникидзе | Training system for operator of oxygen steel-making converter |
| EP0533943B1 (en) * | 1991-03-27 | 2003-07-23 | Kawasaki Steel Corporation | Apparatus for removing non-metalic inclusions in molten metal |
| CN1377747A (en) * | 2001-04-03 | 2002-11-06 | 董淑冬 | Control system for middle ladle plunger of continuous casting machine |
| RU2226006C2 (en) * | 2001-10-04 | 2004-03-20 | ОАО "Западно-Сибирский металлургический комбинат" | Trainer for operator of system controlling continuous casting of steel |
| CN1275154C (en) * | 2004-06-17 | 2006-09-13 | 上海宝信软件股份有限公司 | Continuous cast logistic simulation system based on computer |
| CN101041177A (en) * | 2007-03-21 | 2007-09-26 | 鞍钢股份有限公司 | Automatic stabilized precision control device of the tundish in the center of the concasting |
| CN201096608Y (en) * | 2007-10-26 | 2008-08-06 | 山西新临钢钢铁有限公司 | Liquid tracer adding device |
| CN201921990U (en) * | 2010-12-20 | 2011-08-10 | 中钢集团洛阳耐火材料研究院有限公司 | Continuous casting tundish hydraulics simulating device |
| CN103914627A (en) * | 2014-04-21 | 2014-07-09 | 武汉钢铁(集团)公司 | Method and system for measuring safe continuous casting liquid level of tundishes |
| CN204882033U (en) * | 2015-08-25 | 2015-12-16 | 武汉钢铁(集团)公司 | Continuous casting crystallizer water mechanical model is experimental with package in middle of simulation |
| US20170274446A1 (en) * | 2016-03-25 | 2017-09-28 | Novelis Inc. | Liquid metal jet optimization in direct chill casting |
| CN107282906A (en) * | 2016-04-01 | 2017-10-24 | 南京梅山冶金发展有限公司 | Determine that continuous casting is mixed to pour the mixed of process and pour rate and the experimental method of time |
| CN105728670A (en) * | 2016-04-22 | 2016-07-06 | 中国重型机械研究院股份公司 | Steel ladle liquid level monitoring system and method |
| CN108788030B (en) * | 2017-04-27 | 2021-06-15 | 宝山钢铁股份有限公司 | Test device for simulating flow field in continuous casting crystallizer |
| CN109158567A (en) * | 2018-09-30 | 2019-01-08 | 武汉钢铁有限公司 | Continuous casting production even pours process constant liquis position control method |
| CN109557881A (en) * | 2018-11-19 | 2019-04-02 | 冶金自动化研究设计院 | A kind of computer based steel-making logistics system simulation |
| CN110751893A (en) * | 2019-10-30 | 2020-02-04 | 苏州大学 | Steelmaking full-flow simulation experiment system and method |
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2019
- 2019-10-30 CN CN201911044997.XA patent/CN110751893A/en active Pending
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- 2020-06-10 WO PCT/CN2020/095357 patent/WO2021082458A1/en active Application Filing
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Effective date: 20210210 |