WO2021179752A1 - Système de production à haut-fourneau-convertisseur basé sur un véhicule de croisement de poche de coulée de fer en fusion, et procédé de fonctionnement pour le système - Google Patents

Système de production à haut-fourneau-convertisseur basé sur un véhicule de croisement de poche de coulée de fer en fusion, et procédé de fonctionnement pour le système Download PDF

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Publication number
WO2021179752A1
WO2021179752A1 PCT/CN2020/140773 CN2020140773W WO2021179752A1 WO 2021179752 A1 WO2021179752 A1 WO 2021179752A1 CN 2020140773 W CN2020140773 W CN 2020140773W WO 2021179752 A1 WO2021179752 A1 WO 2021179752A1
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WO
WIPO (PCT)
Prior art keywords
molten iron
scrap
steel
straddle
iron
Prior art date
Application number
PCT/CN2020/140773
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English (en)
Chinese (zh)
Inventor
袁晓峰
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中冶南方工程技术有限公司
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Publication date
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Publication of WO2021179752A1 publication Critical patent/WO2021179752A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
    • B22D41/01—Heating means
    • B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/12—Travelling ladles or similar containers; Cars for ladles
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/56—Manufacture of steel by other methods
    • C21C5/562—Manufacture of steel by other methods starting from scrap
    • C21C5/565—Preheating of scrap
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/04—Making ferrous alloys by melting
    • C22C33/06—Making ferrous alloys by melting using master alloys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention belongs to the technical field of metallurgical equipment, and in particular relates to a blast furnace-converter production system based on a straddle car for molten iron tanks and an operating method thereof.
  • the blast furnace-converter process is a conventional process that uses iron ore to smelt into steel. Under the situation of increasingly tight energy, the importance of effective use of energy and reduction of environmental pollution has become increasingly prominent.
  • the use of scrap steel on the one hand, will greatly increase the utilization rate of scrap steel, on the other hand, it can save a lot of energy and reduce the emission of harmful substances. It is undoubtedly an important way to promote energy conservation and emission reduction in the steel industry.
  • measures to increase the scrap ratio in steelmaking plants include: adding scrap in the blast furnace, adding scrap in the tapping process (blast furnace tapping yard), adding scrap and preheating the molten iron tank, adding scrap and preheating the scrap tank, adding scrap and preheating after the furnace.
  • the invention relates to a blast furnace-converter production system based on a straddle car for an iron ladle and an operating method thereof, which can at least solve part of the defects of the prior art.
  • the invention relates to a blast furnace-converter production system based on a molten iron tank cross car, which includes an iron-making workshop, a steel-making workshop, a molten iron transportation track and a cross car walking on the molten iron transportation track, and also includes scrap stocking ingredients
  • the molten iron transportation track sequentially connects the iron-making workshop, the steel-making workshop, and the scrap storage and batching room in sequence, and the scrap storage and batching room is equipped with a scrap transfer unit for adding scrap steel into the molten iron tank .
  • the molten iron transportation track also has a scrap steel preheating node, and a preheating roaster is arranged at the scrap steel preheating node.
  • the scrap steel preheating node is located between the iron-making workshop and the steel-making workshop.
  • the preheating roaster includes a roasting chamber and a burning roasting mechanism provided in the roasting chamber, and the molten iron transport track passes through the roasting chamber.
  • the burning and roasting mechanism includes a roasting cover suitable for covering the mouth of the hot metal ladle and a cover driving mechanism for driving the roasting cover close to or away from the mouth of the hot metal ladle,
  • a burner is provided on the cover of the baking bag.
  • the cover driving mechanism includes a hoist and a transmission structure for raising and lowering the baking cover, and the hoist is arranged on the top of the baking chamber.
  • the scrap transfer unit includes a scrap steel disk crane, and the movement stroke of the scrap steel disk crane at least covers the scrap storage and batching room and the scrap adding node of the molten iron transportation track.
  • the present invention also relates to the operating method of the blast furnace-converter production system based on the straddle car as described above, which includes the following steps:
  • Step 1 Pass the straddle to receive the molten iron from the ironmaking workshop and then run it to the steelmaking workshop, and use the lifting equipment in the steelmaking workshop to lift the molten iron tank to the converter for iron exchange;
  • Step 2 After the iron is added, the empty iron water tank is returned to the cross car.
  • Step 3 Pass the straddle car and continue to run along the molten iron transportation track to the scrap adding node, and add the scrap in the scrap storage batching room to the empty molten iron tank through the scrap transfer unit;
  • Step four walk across the straddle to the ironmaking workshop and wait for the next tapping.
  • step 4 the scrap steel in the molten iron tank is first preheated, and then the straddle carriage is driven to the ironmaking workshop.
  • a separate storage and batching room for scrap steel is set up, and the scrap steel is added to the empty iron water tank through the scrap transfer unit.
  • the work of the scrap transfer unit does not interfere with the work of the crane and other equipment in the steelmaking workshop , So as to improve the speed and efficiency of scrap steel adding without affecting the existing converter production operations.
  • the scrap storage and batching room is arranged after the steelmaking workshop, which requires less space and is compact without affecting the existing steelmaking workshop site layout.
  • Fig. 1 is a schematic diagram of the plan layout of a blast furnace-converter production system based on a straddle car for an iron ladle according to an embodiment of the present invention
  • Fig. 2 is a schematic structural diagram of a preheated roaster provided by an embodiment of the present invention.
  • an embodiment of the present invention provides a blast furnace-converter production system based on a straddle car for molten iron tanks, including an iron-making workshop 1, a steel-making workshop 5, a molten iron transportation track 2, and a molten iron transportation track 2 walking on the molten iron transportation track 2.
  • a straddle car 3 Over the straddle car 3, it also includes a scrap storage and batching room 6.
  • the molten iron transportation track 2 is connected in series with the iron-making workshop 1, the steel-making workshop 5, and the scrap storage and batching room 6 in sequence.
  • the storage room 6 is equipped with a scrap steel transfer unit 7 for adding scrap steel into the molten iron tank 4.
  • One or more molten iron tanks 4 are placed on the straddle carriage 3, and the molten iron cans 4 follow the straddle carriage 3 to receive molten iron in the ironmaking workshop 1, and then follow the straddle carriage 3 to the steelmaking workshop 5 for the next step of smelting.
  • the above-mentioned ironmaking workshop 1 is generally a blast furnace ironmaking workshop 1
  • the above-mentioned steelmaking workshop 5 is generally a converter steelmaking workshop 5, but it is not limited to such a process flow, and will not be listed in this embodiment.
  • the above-mentioned straddle car 3 is used as molten iron transfer equipment, which is equipped with power equipment and can self-drive in both directions on the molten iron transportation track 2.
  • the straddle car 3 is designed to adopt a dual-drive configuration.
  • the power supply mode of the straddle car 3 is preferably a torque type cable reel, which is installed on the car.
  • the above-mentioned molten iron transportation track 2 can be set in multiple to meet the demand of continuous production, and coordinate the production pace between the iron-making workshop 1 and the steel-making workshop 5.
  • the aforementioned scrap storage and batching room 6 is used to store scrap steel, and it is preferably arranged adjacent to the steelmaking workshop 5 so as to share the scrap steel conveying channel and the scrap steel disposal equipment with the steelmaking workshop 5. Further preferably, there are two groups of the aforementioned scrap steel stocking and batching rooms 6, and the two groups of scrap steel stocking and batching rooms 6 are distributed on both sides of the molten iron transportation track 2.
  • the iron ladle 4 on the straddle car 3 is equipped with scrap steel; in an alternative embodiment, the above two sets of scrap storage and batching rooms 6 can store different types of scrap steel, for example, one of the scrap storage and batching rooms 6 is used for stacking For storage of relatively flexible scrap steel (such as light and thin materials), another scrap storage batching room 6 is used to store large pieces of scrap steel.
  • relatively flexible scrap steel such as light and thin materials
  • another scrap storage batching room 6 is used to store large pieces of scrap steel.
  • the above-mentioned scrap transfer unit 7 may adopt a scrap steel disk crane, and the movement stroke of the scrap steel disk crane at least covers the scrap storage and batching room 6 and the scrap adding node of the molten iron transportation track 2;
  • each group of steel scrap storage and batching rooms 6 is separately equipped with a scrap steel disk crane to facilitate independent control of the two groups of scrap steel storage and batching rooms 6.
  • a separate scrap storage and batching room 6 is set up, and the scrap steel is added to the empty iron water tank 4 through the scrap transfer unit 7.
  • the work of the scrap transfer unit 7 is not the same as that of the steelmaking workshop 5. Interference in the work of vehicles and other equipment, so as to improve the speed and efficiency of scrap adding without affecting the existing converter production operations.
  • the scrap storage and batching room 6 is arranged after the steelmaking workshop 5, which requires less space and is compact without affecting the existing steelmaking workshop. 5 Site layout.
  • the scrap storage and batching room 6 can be arranged next to the steelmaking workshop 5. When the scrap is added, the residual temperature in the molten iron tank 4 is still high, and the residual heat of the molten iron tank 4 can be fully utilized to preheat the scrap and save energy consumption.
  • the molten iron transportation track 2 also has a scrap preheating node, and a preheating roaster is arranged at the scrap preheating node.
  • the preheating roaster is used to heat the scrap steel before receiving iron, and the amount of scrap steel added can be increased by supplementing the heat source; the preheating roaster is arranged online on the molten iron transportation track 2 without additional cranes, the process flow is reasonable, and the equipment The investment is small.
  • the scrap preheating node is located between the ironmaking workshop 1 and the steelmaking workshop 5. The scrap preheating node can be further close to the ironmaking workshop 1 to avoid crossing the straddle car 3 The temperature drop of the scrap steel was too large when running to the ironmaking workshop 1.
  • the above-mentioned preheating roaster includes a roasting chamber 81 and a burning roasting mechanism provided in the roasting chamber 81, and the molten iron transport rail 2 passes through the roasting chamber 81 Room 81.
  • the baking chamber 81 may be a steel structure, such as a portal steel frame, which is convenient for passing the straddle carriage 3 and the molten iron tank 4 through.
  • the above-mentioned burning and roasting mechanism includes a roasting cover 82 suitable for covering on the mouth of the hot metal ladle and a cover driving mechanism for driving the roasting cover 82 to be close to or away from the mouth of the hot metal.
  • a burner is provided on the baking bag cover 82, and the burner may be a burner provided at the bottom of the baking bag cover 82, which heats the scrap steel in the iron ladle 4 by generating a high-temperature flame in the iron ladle 4.
  • the above-mentioned cover driving mechanism can drive the roasting cover 82 up and down, so that the roasting cover 82 is closed on or away from the mouth of the molten iron tank.
  • the cover driving mechanism includes a hoist 83 and a
  • the hoisting machine 83 is arranged on the top of the baking chamber 81; of course, it is not limited to the above-mentioned lifting drive mode, nor is it limited to the above-mentioned cover movement mode
  • the baking bag cover 82 can be driven to rotate, etc., which will not be described in detail here.
  • the embodiment of the present invention also relates to the operation method of the above-mentioned blast furnace-converter production system, which includes the following steps:
  • Step 1 Pass the straddle car 3 to receive the molten iron from the ironmaking workshop 1 and then run to the steelmaking workshop 5.
  • the iron ladle 4 is lifted to the converter by the lifting equipment in the steelmaking workshop 5 for iron exchange.
  • the charging straddle crane can be used Perform iron exchange operations;
  • Step 2 After the iron is added, the empty iron water tank 4 is returned to the straddle car 3.
  • Step 3 The straddle car 3 continues to run along the molten iron transportation track 2 to the scrap adding node, and the scrap steel in the scrap storage and batching room 6 is added to the empty molten iron tank 4 through the scrap transfer unit 7;
  • Step four walk across the straddle car 3 to the ironmaking workshop 1 to wait for the next tapping.
  • step 4 the scrap steel in the molten iron tank 4 is preheated first, and then the straddle carriage 3 is driven to the ironmaking workshop 1.
  • the tapping platforms of the two blast furnaces are centrally arranged, and each blast furnace has two taps.
  • the two blast furnaces are connected to the converter steelmaking workshop 5 and the scrap storage and batching room 6 through 8 molten iron transportation tracks 2 under the swing chute of each taphole.
  • the amount of scrap steel added in each hot metal tank 4 is about 8-15t. If one blast furnace taps 40 cans per day, the average amount of scrap added per time is 12t, so one blast furnace can add 480 tons of scrap per day through this method; two blast furnaces can add 336,000 tons of scrap per year.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

L'invention concerne un système de production à haut-fourneau-convertisseur basé sur un véhicule de croisement (3) de poche de coulée de fer en fusion, et un procédé de fonctionnement pour le système. Le système comprend un atelier de fabrication de fer (1), un atelier de fabrication d'acier (5), un rail de transport de fer en fusion (2), et le véhicule de croisement (3), qui se déplace sur le rail de transport de fer en fusion (2). Le système comprend en outre une salle d'entreposage et de constitution de lots de ferraille d'acier (6). Le rail de transport de fer en fusion (2) relie en séquence l'atelier de fabrication de fer (1), l'atelier de fabrication d'acier (5) et la salle d'entreposage et de constitution de lots de ferraille d'acier (6) en série, et la salle d'entreposage et de constitution de lots de ferraille d'acier (6) est munie d'une unité de transfert de ferraille d'acier (7) pour ajouter de la ferraille d'acier dans une poche de coulée de fer en fusion (4). La salle d'entreposage et de constitution de lots de ferraille d'acier (6) est agencée de manière indépendante, et le travail de l'unité de transfert de ferraille d'acier (7) n'interfère pas avec le travail d'appareils de l'atelier de fabrication d'acier (5) tels qu'un pont roulant, de telle sorte qu'une vitesse et un rendement d'ajout de ferraille d'acier sont améliorés à condition que l'opération de production d'un convertisseur existant ne soit pas affectée ; et sur la base d'une caractéristique de circulation selon laquelle le véhicule de croisement (3) peut se déplacer dans deux directions sans la traction d'une tête de machine, la salle d'entreposage et de constitution de lots de ferraille d'acier (6) est agencée derrière l'atelier de fabrication d'acier (5), l'espace nécessaire est petit, la disposition est compacte, et l'agencement de site de l'atelier de fabrication d'acier (5) existant n'est pas affecté.
PCT/CN2020/140773 2020-03-09 2020-12-29 Système de production à haut-fourneau-convertisseur basé sur un véhicule de croisement de poche de coulée de fer en fusion, et procédé de fonctionnement pour le système WO2021179752A1 (fr)

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CN202010156868.6A CN111304385A (zh) 2020-03-09 2020-03-09 基于铁水罐过跨车的高炉-转炉生产***及其运行方法
CN202010156868.6 2020-03-09

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CN113848835A (zh) * 2021-09-26 2021-12-28 日照钢铁控股集团有限公司 一种生产调度管理***
CN114653934A (zh) * 2022-03-10 2022-06-24 重庆赛迪奇智人工智能科技有限公司 鱼雷罐车加揭盖装置
CN114934140A (zh) * 2022-05-09 2022-08-23 河北新金轧材有限公司 一种减少铁水温降的组织工艺
CN115007844A (zh) * 2022-05-17 2022-09-06 湖南华菱涟源钢铁有限公司 一种铁水罐废钢预热的高炉接铁方法
CN115647346A (zh) * 2022-11-14 2023-01-31 无锡巨力重工股份有限公司 一种采用新能源钢水罐车的钢水罐运输***和运输方式

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CN111304385A (zh) * 2020-03-09 2020-06-19 中冶南方工程技术有限公司 基于铁水罐过跨车的高炉-转炉生产***及其运行方法
CN114440638B (zh) * 2022-02-22 2023-06-06 中国恩菲工程技术有限公司 高温物料输送装置

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CN111304385A (zh) * 2020-03-09 2020-06-19 中冶南方工程技术有限公司 基于铁水罐过跨车的高炉-转炉生产***及其运行方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113848835A (zh) * 2021-09-26 2021-12-28 日照钢铁控股集团有限公司 一种生产调度管理***
CN114653934A (zh) * 2022-03-10 2022-06-24 重庆赛迪奇智人工智能科技有限公司 鱼雷罐车加揭盖装置
CN114934140A (zh) * 2022-05-09 2022-08-23 河北新金轧材有限公司 一种减少铁水温降的组织工艺
CN114934140B (zh) * 2022-05-09 2024-04-26 河北新金轧材有限公司 一种减少铁水温降的组织工艺
CN115007844A (zh) * 2022-05-17 2022-09-06 湖南华菱涟源钢铁有限公司 一种铁水罐废钢预热的高炉接铁方法
CN115007844B (zh) * 2022-05-17 2024-02-23 湖南华菱涟源钢铁有限公司 一种铁水罐废钢预热的高炉接铁方法
CN115647346A (zh) * 2022-11-14 2023-01-31 无锡巨力重工股份有限公司 一种采用新能源钢水罐车的钢水罐运输***和运输方式

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