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WO2024060290A1 - Procédé et dispositif terminal de détermination de position d'injection de haut fourneau, et support de stockage - Google Patents

Procédé et dispositif terminal de détermination de position d'injection de haut fourneau, et support de stockage Download PDF

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Publication number
WO2024060290A1
WO2024060290A1 PCT/CN2022/122634 CN2022122634W WO2024060290A1 WO 2024060290 A1 WO2024060290 A1 WO 2024060290A1 CN 2022122634 W CN2022122634 W CN 2022122634W WO 2024060290 A1 WO2024060290 A1 WO 2024060290A1
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WO
WIPO (PCT)
Prior art keywords
blast furnace
furnace
injection
blast
injection position
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Ceased
Application number
PCT/CN2022/122634
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English (en)
Chinese (zh)
Inventor
吴映江
李鹏
徐永斌
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Wisdri Engineering and Research Incorporation Ltd
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Wisdri Engineering and Research Incorporation Ltd
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/006—Automatically controlling the process
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
    • G06F2119/08—Thermal analysis or thermal optimisation

Definitions

  • the invention relates to the field of blast furnace smelting, and in particular to a blast furnace injection position determination method, terminal equipment and storage medium.
  • the blast furnace process accounts for 70-90% of the entire steel emissions, due to its advantages of mature process technology, large production capacity, and high efficiency, the blast furnace will still be the mainstream supporting the huge demand for steel materials for a considerable period of time in the future. Ironmaking equipment. Therefore, low-carbon blast furnace technology is a path that the steel industry needs to explore.
  • the more mainstream low-carbon blast furnace technologies include top gas circulation technology and hydrogen-rich gas injection.
  • the main technical route is to inject highly reducing gas into the blast furnace shaft or hearth to improve the reducing atmosphere inside the blast furnace. , promote the development of indirect reduction, reduce the proportion of direct reduction, thereby reducing the consumption of coke or fixed carbon in blast furnace smelting, and realizing low-carbon smelting in blast furnaces.
  • the temperature, composition and position of the injection gas cause fluctuations in the blast furnace conditions, thereby increasing the consumption of the blast furnace, which goes against the original intention of saving energy and reducing consumption.
  • the present invention proposes a blast furnace injection position determination method, terminal equipment and storage medium.
  • a method for determining the injection position of a blast furnace including the following steps:
  • S2 Determine the initial degree of direct reduction, the composition and temperature of the injection reduction gas, as well as the initial injection volume and initial injection position;
  • step S5 Based on the smelting process parameters of the blast furnace calculated in step S4, calculate the first full furnace heat balance of the blast furnace, and adjust the coke ratio or coal ratio so that the heat error calculated through the first full furnace heat balance is within the set heat error Within the range, record the smelting process parameters at this time;
  • step S7 Based on the smelting process parameters recorded in step S5, calculate the heat balance of the solid charge area, and determine whether the heat balance of the solid charge area reaches the heat balance allowable error. If it does, record the smelting process parameters at this time and enter S8; otherwise, in the blast furnace Increase the injection position and set the corresponding initial injection amount, then return to S3;
  • step S8 Based on the smelting process parameters recorded in step S7, calculate the corresponding combustion temperature and blast kinetic energy, and determine whether the differences between the calculated combustion temperature and blast kinetic energy and the theoretical combustion temperature and theoretical blast kinetic energy meet the parameter error range. If Yes, output all injection positions and corresponding injection volumes; otherwise, return to S3 after readjusting the furnace injection volume or oxygen enrichment rate.
  • the initial smelting process parameters of the blast furnace include pig iron composition, slag composition, furnace dust composition and content, raw fuel composition, blast parameters, and the amount and composition of blast furnace output materials.
  • the initial injection position of the reducing gas is set to the tuyere of the furnace hearth.
  • 900-1000°C is used as the dividing line between the solid charge area and the high temperature area.
  • the caloric error range is less than 5 ⁇ 10 -4
  • the direct reduction degree error range is less than 10 -3
  • the parameter error range is less than 2%.
  • a blast furnace injection position determination terminal device including a processor, a memory, and a computer program stored in the memory and executable on the processor.
  • the processor executes the computer program, the embodiment of the present invention is implemented. The steps of the above method.
  • a computer-readable storage medium stores a computer program.
  • the computer program is executed by a processor, the steps of the method described above in the embodiment of the present invention are implemented.
  • the present invention adopts the above technical scheme and provides a technical scheme that can determine the optimal position combination of the reducing medium injection in the blast furnace and the appropriate injection amount at each position. It comprehensively considers the energy and quality balance of the entire blast furnace, the regional heat balance, the blast depth, the theoretical combustion temperature and the furnace body efficiency. Through multi-objective optimization, it overcomes the fluctuations in the blast furnace condition caused by the new process and ensures the smooth operation of the blast furnace and the furnace body efficiency.
  • FIG. 1 is a flow chart showing a first embodiment of the present invention.
  • An embodiment of the present invention provides a method for determining a blast furnace injection position, as shown in FIG1 , the method comprising the following steps:
  • S1 Set the initial smelting process parameters of the blast furnace, and record the theoretical combustion temperature, theoretical blast kinetic energy and theoretical furnace efficiency of the blast furnace before the reduction gas is injected.
  • the initial smelting process parameters of the blast furnace are the daily smelting process parameters before the reducing gas is injected into the blast furnace. They are calculated using material balance and heat balance combined with daily production data.
  • the initial smelting process parameters of the blast furnace include pig iron composition, slag composition, furnace dust composition and content, raw fuel composition, blast parameters, blast furnace output material quantity and composition, etc.
  • Theoretical combustion temperature, theoretical blast kinetic energy and theoretical furnace efficiency are used as later optimization targets.
  • S2 Determine the initial degree of direct reduction, the composition and temperature of the injection reduction gas, as well as the initial injection volume and set injection position.
  • the initial injection position for injecting the reducing gas is set to the tuyere of the furnace hearth.
  • the injection position is the tuyere of the furnace hearth
  • the injection is only carried out at the tuyere of the furnace hearth with the composition and temperature of the injection reduction gas determined in step S2, and then the injection positions are sequentially added to the furnace body.
  • step S5 Based on the smelting process parameters of the blast furnace calculated in step S4, calculate the first full furnace heat balance of the blast furnace, and adjust the coke ratio or coal ratio so that the heat error calculated through the first full furnace heat balance is within the set heat error Within the range, record the smelting process parameters at this time.
  • the heat error range is set to less than 5 ⁇ 10 -4 .
  • S6 Calculate the direct reduction degree based on the Riester curve and combined with the theoretical furnace efficiency. By adjusting the furnace injection volume or oxygen enrichment rate, the calculated direct reduction degree and the initial direct reduction degree are equal to each other while ensuring the furnace efficiency. The error is within the set direct reduction error range.
  • the direct reduction degree error range is set to less than 10 -3 .
  • step S7 Based on the smelting process parameters recorded in step S5, calculate the heat balance of the solid charge area, and determine whether the heat balance of the solid charge area reaches the heat balance allowable error. If it does, record the smelting process parameters at this time and enter S8; otherwise, in the blast furnace Go to the increased injection position, set the corresponding initial injection amount, and return to S3.
  • 900-1000°C is used as the dividing line between the solid charge zone and the high temperature zone.
  • step S8 Based on the smelting process parameters recorded in step S7, calculate the corresponding combustion temperature and blast kinetic energy, and determine whether the differences between the calculated combustion temperature and blast kinetic energy and the theoretical combustion temperature and theoretical blast kinetic energy meet the parameter error range. If so, output all injection positions and corresponding injection amounts; otherwise, readjust the furnace injection amount or oxygen enrichment rate and return to S3.
  • the parameter error range is set to less than 2%.
  • this embodiment can obtain the position and corresponding amount of reducing gas that needs to be injected into the blast furnace, as well as the coke ratio, coal ratio, air consumption per ton of iron, oxygen enrichment rate, theoretical combustion temperature, and per ton of iron of the blast furnace.
  • a series of blast furnace smelting process parameters such as gas production volume and gas utilization rate. In this way, the changes in the technical and economic indicators of the blast furnace can be obtained under different reducing gas injection conditions.
  • the invention also provides a blast furnace injection position determination terminal device, which includes a memory, a processor and a computer program stored in the memory and executable on the processor.
  • a blast furnace injection position determination terminal device which includes a memory, a processor and a computer program stored in the memory and executable on the processor.
  • the processor executes the computer program, The steps in the above method embodiment of Embodiment 1 of the present invention.
  • the blast furnace injection position determination terminal device may be a computing device such as a desktop computer, notebook, PDA, cloud server, etc.
  • the blast furnace injection position determination terminal device may include, but is not limited to, a processor and a memory.
  • the above-mentioned composition structure of the blast furnace injection position determination terminal equipment is only an example of the blast furnace injection position determination terminal equipment, and does not constitute a limitation of the blast furnace injection position determination terminal equipment, and may include more than the above. or fewer components, or a combination of certain components, or different components.
  • the blast furnace injection position determination terminal device may also include input and output devices, network access devices, buses, etc. This is not the case in the embodiment of the present invention. limited.
  • the so-called processor can be a central processing unit (Central Processing Unit, CPU), or other general-purpose processor, digital signal processor (Digital Signal Processor, DSP), application-specific integrated circuit ( Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • the general processor can be a microprocessor or the processor can be any conventional processor.
  • the processor is the control center of the blast furnace injection position determination terminal equipment and uses various interfaces and lines to connect the entire blast furnace injection position. Blow positions determine various parts of the terminal equipment.
  • the memory may be used to store the computer program and/or module, and the processor implements the blast furnace by running or executing the computer program and/or module stored in the memory, and calling data stored in the memory.
  • the injection position determines various functions of the terminal equipment.
  • the memory may mainly include a stored program area and a stored data area, wherein the stored program area may store an operating system and at least one application required for a function; the stored data area may store data created based on the use of the mobile phone, etc.
  • the memory can include high-speed random access memory, and can also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card , Flash Card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.
  • non-volatile memory such as hard disk, memory, plug-in hard disk, smart memory card (Smart Media Card, SMC), secure digital (Secure Digital, SD) card , Flash Card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.
  • the present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the above method in the embodiment of the present invention are implemented.
  • the integrated module/unit of the blast furnace injection position determination terminal equipment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the present invention can implement all or part of the processes in the methods of the above embodiments, and can also be completed by instructing relevant hardware through a computer program.
  • the computer program can be stored in a computer-readable storage medium, and the computer program can be stored in a computer-readable storage medium. When the program is executed by the processor, the steps of each of the above method embodiments can be implemented.
  • the computer program includes computer program code, which may be in the form of source code, object code, executable file or some intermediate form.
  • the computer-readable medium may include: any entity or device capable of carrying the computer program code, recording media, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory) , random access memory (RAM, Random Access Memory) and software distribution media, etc.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
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  • Chemical & Material Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • General Engineering & Computer Science (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

La présente invention concerne un procédé et un dispositif terminal de détermination de position d'injection de haut fourneau, et un support de stockage. Le procédé consiste à : ajuster un taux de coke ou un taux de charbon sur la base de l'équilibre de matériau du four dans son ensemble et de l'équilibre thermique ; ajuster le volume d'injection ou le taux d'enrichissement en oxygène d'un foyer sur la base d'un degré de réduction directe et d'efficacité d'empilement ; ajouter des positions d'injection sur la base du bilan thermique d'une zone de charge de four solide ; ajuster le volume d'injection ou le taux d'enrichissement en oxygène du foyer sur la base des erreurs entre une température de combustion et une énergie cinétique de souffle et des valeurs initiales ; et entrer toutes les positions d'injection après ajustement et des volumes d'injection correspondants. Selon la présente invention, au moyen d'une optimisation multi-objectif, une fluctuation de la condition de haut fourneau provoquée par un nouveau processus est surmontée, et le fonctionnement régulier ainsi que l'efficacité d'empilement d'un haut fourneau sont assurées.
PCT/CN2022/122634 2022-09-21 2022-09-29 Procédé et dispositif terminal de détermination de position d'injection de haut fourneau, et support de stockage Ceased WO2024060290A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211149240.9A CN115470589A (zh) 2022-09-21 2022-09-21 一种高炉喷吹位置确定方法、终端设备及存储介质
CN202211149240.9 2022-09-21

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102643937A (zh) * 2012-04-09 2012-08-22 河北钢铁股份有限公司邯郸分公司 一种高炉喷吹工艺
WO2018014419A1 (fr) * 2016-07-18 2018-01-25 东北大学 Procédé pour la production par réduction par fusion d'un laitier mixte et pour sa trempe
CN113832270A (zh) * 2021-09-18 2021-12-24 中冶赛迪工程技术股份有限公司 一种多介质喷吹的高炉炼铁方法
CN114134271A (zh) * 2021-12-03 2022-03-04 昌黎县兴国精密机件有限公司 一种高炉低碳冶炼的喷吹调控装置及方法
CN114182050A (zh) * 2021-09-23 2022-03-15 中冶赛迪工程技术股份有限公司 一种确定炉身喷吹最佳位置的方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102643937A (zh) * 2012-04-09 2012-08-22 河北钢铁股份有限公司邯郸分公司 一种高炉喷吹工艺
WO2018014419A1 (fr) * 2016-07-18 2018-01-25 东北大学 Procédé pour la production par réduction par fusion d'un laitier mixte et pour sa trempe
CN113832270A (zh) * 2021-09-18 2021-12-24 中冶赛迪工程技术股份有限公司 一种多介质喷吹的高炉炼铁方法
CN114182050A (zh) * 2021-09-23 2022-03-15 中冶赛迪工程技术股份有限公司 一种确定炉身喷吹最佳位置的方法
CN114134271A (zh) * 2021-12-03 2022-03-04 昌黎县兴国精密机件有限公司 一种高炉低碳冶炼的喷吹调控装置及方法

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