WO2021212656A1 - Low-temperature high-manganese austenitic steel rapid alloying process - Google Patents

Low-temperature high-manganese austenitic steel rapid alloying process Download PDF

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WO2021212656A1
WO2021212656A1 PCT/CN2020/098814 CN2020098814W WO2021212656A1 WO 2021212656 A1 WO2021212656 A1 WO 2021212656A1 CN 2020098814 W CN2020098814 W CN 2020098814W WO 2021212656 A1 WO2021212656 A1 WO 2021212656A1
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Prior art keywords
ladle
alloying
manganese
steel
tapping
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PCT/CN2020/098814
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French (fr)
Chinese (zh)
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曹余良
周桂成
袁广鹏
吴国平
贾攀
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南京钢铁股份有限公司
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Priority to KR1020227036492A priority Critical patent/KR102581522B1/en
Priority to AU2020443584A priority patent/AU2020443584B2/en
Publication of WO2021212656A1 publication Critical patent/WO2021212656A1/en

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    • 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
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/34—Blowing through the bath
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/072—Treatment with gases
    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories, or equipment peculiar to rotary-drum furnaces
    • F27B7/22—Rotary drums; Supports therefor
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/001—Austenite
    • 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 relates to a fast alloying process of high-manganese austenitic steel for low temperature.
  • High-manganese austenitic steel for low temperature use (15% ⁇ [Mn] ⁇ 30%), due to the high manganese content of molten steel and easy oxidation of manganese, it cannot be added to the converter together with the scrap steel.
  • Manganese can only be carried out through the converter tapping and LF refining process
  • the alloying of manganese leads to long manganese alloying time (more than 8 hours), low production efficiency, which is not conducive to continuous casting production; and long-term LF furnace alloying is likely to cause high content of molten steel hydrogen and nitrogen gas, which will affect the quality of continuous casting billets. Have a greater impact.
  • the technical problem to be solved by the present invention is to provide a rapid alloying process for high manganese austenitic steel at low temperature in view of the shortcomings of the above prior art, reducing the manganese alloying time of high manganese austenitic steel from 8 hours to Within 3 hours, the production efficiency and the quality of molten steel were improved, and the rapid alloying of high-manganese austenitic steel for low temperature was realized.
  • the technical solution of the present invention to solve the above technical problems is: a rapid alloying process of high manganese austenitic steel for low temperature, including manganese alloy baking ⁇ converter tapping and tapping alloying ⁇ LF slag alloying, specifically:
  • the grid plate is welded into a support with the same diameter as the bottom of the ladle, and the support is put into the bottom of the ladle; then the manganese alloy that needs to be baked is added to the ladle, and the amount of manganese alloy added is 230-260Kg/ t steel, and the addition amount does not exceed three-quarters of the volume of the ladle;
  • the tapping amount the weight of the standard ladle holding steel-the weight of the baked manganese alloy -1/3*The weight of the standard ladle containing steel, the converter tapping temperature is 1660°C-1700°C, and the tapping time is 3-5min;
  • LF refining furnace electrode heating and heating, stirring and desulfurization under 400-500NL/min large argon gas, large argon gas stirring and heating, heating and alloying, raising the temperature of molten steel to 1580°C-1600°C, and the heating time is more than 60 minutes;
  • the present invention further defines the scheme:
  • the ladle age of the aforementioned prepared ladle is before one third of the total ladle age.
  • a layer of lime for steelmaking is added on the manganese alloy.
  • the amount of lime added is 8-10Kg/t steel.
  • the baked alloy steel ladle is hoisted to the tapping station of the converter, and the bottom blowing of the ladle is turned on, and the flow rate of the bottom blowing of the ladle is 600-800 Nl/min.
  • the aforementioned lime is added in batches during the cooling process of large argon gas to accelerate the cooling, each batch of lime is added 1.5Kg/t, and the total amount added in the cooling process is not more than 6Kg/t.
  • the present invention carries out the process control of suitable alloy amount, suitable baking temperature, baking time and baking batch in advance through the steel ladle, and at the same time optimizing the converter steel tapping temperature and LF alloying process, greatly shortening LF refining furnace alloying time.
  • the LF refining furnace alloying time is shortened from 9 hours to 3 hours, which reduces the probability of increasing the molten steel gas content caused by the long-term heating of the LF refining furnace for alloying, which not only ensures continuous production, but also improves product quality .
  • 150t converter, 150t LF refining furnace smelting, 25Mn steel grade are selected, and a high-manganese austenitic steel rapid alloying process for low temperature is provided, including manganese alloy baking ⁇ converter tapping and tapping alloying ⁇ LF
  • the process flow of slag alloying is as follows:
  • Ladle preparation The total ladle age is 100 furnaces, and the No. 23 ladle with the ladle age of 19 furnaces is selected as the alloy baking ladle;
  • the electrodes of LF refining furnace are heated and sampled. For details, see Table 1. Large argon gas is stirred for desulfurization, the bottom blowing of the ladle is turned on, the argon flow rate is 500 NL/min, the large argon gas is stirred and heated for alloying for 77 minutes, and the molten steel temperature is 1593°C;
  • the present invention can also have other embodiments. All technical solutions formed by equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

A low-temperature high-manganese austenitic steel rapid alloying process, comprising manganese alloy baking→converter tapping and tapping alloying→LF slag alloying, and specifically: (1) preparing a ladle the ladle age of which is in an early stage; (2) preparing a ladle support piece and transporting the manganese alloy that requires baking into the ladle; (3) ladle alloy baking; (4) controlling the tapping amount and tapping temperature of a converter; (5) LF refining furnace temperature rise alloying process; and (6) LF refining furnace large argon stirring, cooling and alloying process. The alloying process reduces the manganese alloying time of high-manganese austenitic steel from eight hours to within three hours, improving production efficiency and molten steel quality.

Description

一种低温用高锰奥氏体钢快速合金化工艺High-manganese austenitic steel rapid alloying process for low temperature 技术领域Technical field
本发明涉及一种低温用高锰奥氏体钢快速合金化工艺。The invention relates to a fast alloying process of high-manganese austenitic steel for low temperature.
背景技术Background technique
低温用高锰奥氏体钢(15％≤[Mn]≤30％)，由于钢水锰含量高，且锰易氧化，不能随废钢一起加入转炉，只能通过转炉出钢和LF精炼过程进行锰的合金化，导致锰合金化时间长(8小时以上)，生产效率低，不利于连铸生产；且长时间的LF炉合金化又容易造成钢水氢、氮气体含量高，对连铸坯质量有较大影响。为了提高高锰奥氏体钢(15％≤[Mn]≤30％)生产效率，提升连铸坯质量，开发一种转炉冶炼生产低温高锰奥氏体钢快速合金化炼钢工艺，是急需解决的一个问题。High-manganese austenitic steel for low temperature use (15%≤[Mn]≤30%), due to the high manganese content of molten steel and easy oxidation of manganese, it cannot be added to the converter together with the scrap steel. Manganese can only be carried out through the converter tapping and LF refining process The alloying of manganese leads to long manganese alloying time (more than 8 hours), low production efficiency, which is not conducive to continuous casting production; and long-term LF furnace alloying is likely to cause high content of molten steel hydrogen and nitrogen gas, which will affect the quality of continuous casting billets. Have a greater impact. In order to improve the production efficiency of high manganese austenitic steel (15%≤[Mn]≤30%) and improve the quality of continuous casting billets, it is urgent to develop a converter smelting process to produce low-temperature high-manganese austenitic steel with rapid alloying steelmaking. A problem solved.
发明内容Summary of the invention
本发明所要解决的技术问题是，针对以上现有技术存在的缺点，提供一种低温用高锰奥氏体钢快速合金化工艺，将高锰奥氏体钢锰合金化时间由8小时降低至3小时以内，提高生产效率及钢水质量，实现了低温用高锰奥氏体钢快速合金化。The technical problem to be solved by the present invention is to provide a rapid alloying process for high manganese austenitic steel at low temperature in view of the shortcomings of the above prior art, reducing the manganese alloying time of high manganese austenitic steel from 8 hours to Within 3 hours, the production efficiency and the quality of molten steel were improved, and the rapid alloying of high-manganese austenitic steel for low temperature was realized.
本发明解决以上技术问题的技术方案是：一种低温用高锰奥氏体钢快速合金化工艺，包括锰合金烘烤→转炉出钢和出钢合金化→LF化渣合金化，具体为：The technical solution of the present invention to solve the above technical problems is: a rapid alloying process of high manganese austenitic steel for low temperature, including manganese alloy baking→ converter tapping and tapping alloying→LF slag alloying, specifically:
(一)：锰合金烘烤：(1): Manganese alloy baking:
(1)准备钢包包龄在前期的钢包；(1) Prepare the ladle with the ladle age in the early stage;
(2)采用格栅板焊接成与钢包底直径大小相同的支撑件，将制作的支撑件放入钢包底部；然后加入需要烘烤的锰合金至钢包内，该锰合金加入量230-260Kg/t钢，且加入量不超过钢包容积的四分之三；(2) The grid plate is welded into a support with the same diameter as the bottom of the ladle, and the support is put into the bottom of the ladle; then the manganese alloy that needs to be baked is added to the ladle, and the amount of manganese alloy added is 230-260Kg/ t steel, and the addition amount does not exceed three-quarters of the volume of the ladle;
(3)将准备好的装有锰合金的钢包，放置到正常上线钢包烘烤工位开始烘烤，烘烤火焰温度调整至1000℃，烘烤时间24小时以上；(3) Place the prepared ladle containing manganese alloy in the normal on-line ladle baking station to start baking, adjust the baking flame temperature to 1000°C, and bake for more than 24 hours;
(二)：转炉出钢和出钢合金化：(2): Converter tapping and tapping alloying:
(1)将烘烤好的合金钢包吊运至转炉出钢工位，接通钢包底吹，打开钢包底吹进行出钢，其出钢量＝标准钢包盛钢重量-烘烤锰合金的重量-1/3*标准钢包盛钢重量，转炉出钢温度1660℃-1700℃，出钢时间为3-5min；(1) Lift the baked alloy ladle to the converter tapping station, turn on the bottom blowing of the ladle, turn on the bottom blowing of the ladle to tap the steel, the tapping amount = the weight of the standard ladle holding steel-the weight of the baked manganese alloy -1/3*The weight of the standard ladle containing steel, the converter tapping temperature is 1660℃-1700℃, and the tapping time is 3-5min;
(三)：LF化渣合金化：(3): LF slag alloying:
(1)LF精炼炉升温合金化过程：(1) Heating alloying process of LF refining furnace:
LF精炼炉电极加热升温，在流量为400-500NL/min大氩气下搅拌脱硫，大氩气搅拌加热升温合金化，将钢水温度提升至1580℃-1600℃，升温时间为60分钟以上；LF refining furnace electrode heating and heating, stirring and desulfurization under 400-500NL/min large argon gas, large argon gas stirring and heating, heating and alloying, raising the temperature of molten steel to 1580℃-1600℃, and the heating time is more than 60 minutes;
(2)LF精炼炉大氩气搅拌降温合金化过程：(2) LF refining furnace large argon stirring and cooling alloying process:
当钢水温度升至1580℃-1600℃后，停止升温操作，调整钢包底吹氩气流量至600NL/min，落下LF精炼炉钢包小炉盖，进行大氩气搅拌降温操作，钢水温度降低至1480℃后，合金化工作完成，停止大氩气搅拌，调整钢包底吹氩气流量至50-80NL/min继续搅拌15分钟，吊至连铸工位进行浇铸作业，在大氩气搅拌降温过程中取样测温，根据取样分析钢水中成分情况，若小于钢种要求成分范围，则加入合金进行钢水成分微调，逐步将钢水成分调整至钢种要求的成分范围内。When the temperature of molten steel rises to 1580°C-1600°C, stop the heating operation, adjust the flow of argon blowing at the bottom of the ladle to 600NL/min, drop the small furnace cover of the LF refining furnace ladle, and perform a large argon stirring and cooling operation, and the temperature of the molten steel is reduced to 1480 After ℃, the alloying work is completed, stop the large argon stirring, adjust the flow of argon blowing at the bottom of the ladle to 50-80NL/min and continue to stir for 15 minutes, hoist to the continuous casting station for casting operation, and during the cooling process of large argon stirring Sampling and temperature measurement, according to the sampling analysis of the composition of the molten steel, if it is less than the required composition range of the steel grade, add alloy to fine-tune the composition of the molten steel, and gradually adjust the composition of the molten steel to the required composition range of the steel grade.
本发明进一步限定方案：The present invention further defines the scheme:
前述的准备钢包的包龄在总包龄三分之一之前。The ladle age of the aforementioned prepared ladle is before one third of the total ladle age.
前述的在锰合金加入钢包后，在锰合金上面加入一层炼钢用石灰，石灰加入量8-10Kg/t钢。After the manganese alloy is added to the ladle, a layer of lime for steelmaking is added on the manganese alloy. The amount of lime added is 8-10Kg/t steel.
前述的将烘烤好的合金钢包吊运至转炉出钢工位，接通钢包底吹，钢包底吹流量600-800Nl/min。As mentioned above, the baked alloy steel ladle is hoisted to the tapping station of the converter, and the bottom blowing of the ladle is turned on, and the flow rate of the bottom blowing of the ladle is 600-800 Nl/min.
前述的在大氩气搅拌降温过程中分批次加入石灰加速降温，每批次石灰加入1.5Kg/t，降温过程总加入量不大于6Kg/t。The aforementioned lime is added in batches during the cooling process of large argon gas to accelerate the cooling, each batch of lime is added 1.5Kg/t, and the total amount added in the cooling process is not more than 6Kg/t.
本发明的有益效果是：本发明通钢包提前进行合适合金量、适当烘烤温度、烘烤时间和烘烤批次的工艺控制，同时优化转炉出钢温度及LF合金化工艺，大大缩短了LF精炼炉合金化时间，LF精炼炉合金化时间由9小时缩短至3小时，降低了由于LF精炼炉长时间升温化合金导致的钢水气体含量增加概率，既保证连续生产，又提高了产品质量。The beneficial effects of the present invention are: the present invention carries out the process control of suitable alloy amount, suitable baking temperature, baking time and baking batch in advance through the steel ladle, and at the same time optimizing the converter steel tapping temperature and LF alloying process, greatly shortening LF refining furnace alloying time. The LF refining furnace alloying time is shortened from 9 hours to 3 hours, which reduces the probability of increasing the molten steel gas content caused by the long-term heating of the LF refining furnace for alloying, which not only ensures continuous production, but also improves product quality .
具体实施方式Detailed ways
实施例1Example 1
本实施例选择150t转炉、150吨LF精炼炉冶炼、25Mn钢种，提供一种低温用高锰奥氏体钢快速合金化工艺，包括锰合金烘烤→转炉出钢和出钢合金化→LF化渣合金化工艺流程，具体为：In this embodiment, 150t converter, 150t LF refining furnace smelting, 25Mn steel grade are selected, and a high-manganese austenitic steel rapid alloying process for low temperature is provided, including manganese alloy baking → converter tapping and tapping alloying → LF The process flow of slag alloying is as follows:
(一)：锰合金烘烤：(1): Manganese alloy baking:
(1)钢包准备：钢包总包龄为100炉，选择包龄为19炉的23号钢包作为合金烘烤钢包；(1) Ladle preparation: The total ladle age is 100 furnaces, and the No. 23 ladle with the ladle age of 19 furnaces is selected as the alloy baking ladle;
(2)选用直径10mm的普通钢筋焊接制作成钢包底部直径大小的支撑件2块，将制作的支撑件放入钢包底部；加入金属锰合金35吨，然后向钢包内加入炼钢用石灰1.5吨，防止钢包内靠上层的锰合金被火焰烘烤软化；(2) Select ordinary steel bars with a diameter of 10mm and weld them to make 2 supports with the size of the bottom of the ladle, put the made supports into the bottom of the ladle; add 35 tons of metal manganese alloy, and then add 1.5 tons of lime for steelmaking into the ladle , To prevent the upper manganese alloy in the ladle from being softened by flame baking;
(3)将准备好的装有金属锰和石灰的钢包，吊放置到正常上线钢包烘烤工位开始烘烤，烘烤火焰温度调整至1000℃，进行烘烤，合金烘烤时间27小时；(3) Hang the prepared ladle containing manganese metal and lime to the normal on-line ladle baking station to start baking, and adjust the baking flame temperature to 1000°C for baking. The alloy baking time is 27 hours;
(二)：转炉出钢和出钢合金化(2): Converter tapping and tapping alloying
(1)将烘烤27小时装有金属锰的钢包，吊运至转炉出钢工位，烘烤好的合金温度为708℃，接通钢包底吹，钢包底吹流量800Nl/min，打开钢包底吹进行出钢，其出钢量＝150吨-35吨-1/3*150吨＝100吨，转炉出钢温度1668℃，出钢时间为3min；(1) Lift the ladle containing manganese metal after baking for 27 hours to the tapping station of the converter. The temperature of the baked alloy is 708℃. The bottom blowing of the ladle is turned on. The bottom blowing flow rate of the ladle is 800Nl/min, and the ladle is opened. Bottom blowing is used for tapping, the tapping amount = 150 tons-35 tons-1/3*150 tons = 100 tons, the converter tapping temperature is 1668°C, and the tapping time is 3 minutes;
(三)：LF化渣合金化(3): LF slag alloying
(1)LF精炼炉升温合金化过程：(1) Heating alloying process of LF refining furnace:
LF精炼炉电极加热升温并取样，具体见表1，大氩气搅拌脱硫，接通钢包底吹，氩气流量500NL/min，大氩气搅拌加热升温合金化77分钟，钢水温度1593℃；The electrodes of LF refining furnace are heated and sampled. For details, see Table 1. Large argon gas is stirred for desulfurization, the bottom blowing of the ladle is turned on, the argon flow rate is 500 NL/min, the large argon gas is stirred and heated for alloying for 77 minutes, and the molten steel temperature is 1593°C;
(2)LF精炼炉大氩气搅拌降温合金化过程：(2) LF refining furnace large argon stirring and cooling alloying process:
钢水温度升至1583℃后，停止升温操作，调整钢包底吹氩气流量至600NL/min，落下LF精炼炉钢包小炉盖，能够隔绝空气，防止二次氧化，进行氩气大搅拌降温操作，大氩气搅拌降温过程，分2批次加入石灰加速降温，每批次石灰加入1.5Kg/t，使钢水温度降低至1487℃后，用时为65分钟，合金化工作完成，停止大氩气搅拌，调整钢包底吹氩气流量至50NL/min继续搅拌15分钟，吊至连铸工位进行浇铸，在大氩气搅拌降温过程取样测温,具体见表1。After the temperature of molten steel rises to 1583℃, stop the heating operation, adjust the flow of argon blowing at the bottom of the ladle to 600NL/min, and drop the small furnace cover of the LF refining furnace to isolate the air and prevent secondary oxidation. Perform argon stirring and cooling operation. During the cooling process of large argon stirring, lime is added in 2 batches to accelerate the cooling. Each batch of lime is added 1.5Kg/t to reduce the temperature of molten steel to 1487℃, which takes 65 minutes. The alloying work is completed, and the large argon stirring is stopped. , Adjust the flow of argon blowing at the bottom of the ladle to 50NL/min and continue stirring for 15 minutes, hoist to the continuous casting station for casting, take samples during the cooling process of large argon stirring, see Table 1 for details.
表1：LF化渣合金化过程温度及锰成分Table 1: LF slag alloying process temperature and manganese composition
Figure PCTCN2020098814-appb-000001
Figure PCTCN2020098814-appb-000001
本实施例25Mn生产，加入烘烤合金35吨，烘烤时间27小时，烘烤后温度708℃；LF精炼炉升温锰合金化过程时间77分钟，温度升至1583℃，升温结束钢水锰含量23.04％；LF精炼炉大氩气搅拌降温锰合金化过程时间65分钟，温度降低至1587℃，降温结束钢水锰含量23.41％，满足钢种成分要求，LF炉合金化总时间控制142分钟，大大提高了生产效率。In the example of 25Mn production, 35 tons of baking alloy were added, baking time was 27 hours, and the temperature after baking was 708°C; the manganese alloying process time of LF refining furnace was increased for 77 minutes, the temperature rose to 1583°C, and the manganese content of molten steel was 23.04 at the end of the temperature rise. %; LF refining furnace with large argon gas stirring and cooling manganese alloying process time is 65 minutes, the temperature is reduced to 1587℃, and the manganese content of molten steel is 23.41% at the end of cooling, which meets the requirements of steel grades. The total time of LF furnace alloying is controlled for 142 minutes, which greatly improves Increased production efficiency.
除上述实施例外，本发明还可以有其他实施方式。凡采用等同替换或等效变换形成的技术方案，均落在本发明要求的保护范围。In addition to the above-mentioned embodiments, the present invention can also have other embodiments. All technical solutions formed by equivalent replacements or equivalent transformations fall within the protection scope of the present invention.

Claims (5)

  1. 一种低温用高锰奥氏体钢快速合金化工艺，包括锰合金烘烤→转炉出钢和出钢合金化→LF化渣合金化，其特征在于：具体为：A rapid alloying process of high-manganese austenitic steel for low temperature, including manganese alloy baking → converter tapping and tapping alloying → LF slag alloying, and is characterized in that: specifically:
    (一)：锰合金烘烤：(1): Manganese alloy baking:
    (1)准备钢包包龄在前期的钢包；(1) Prepare the ladle with the ladle age in the early stage;
    (2)采用格栅板焊接成与钢包底直径大小相同的支撑件，将制作的支撑件放入钢包底部；然后加入需要烘烤的锰合金至钢包内，该锰合金加入量230-260Kg/t钢，且加入量不超过钢包容积的四分之三；(2) The grid plate is welded into a support with the same diameter as the bottom of the ladle, and the support is put into the bottom of the ladle; then the manganese alloy that needs to be baked is added to the ladle, and the amount of manganese alloy added is 230-260Kg/ t steel, and the addition amount does not exceed three-quarters of the volume of the ladle;
    (3)将准备好的装有锰合金的钢包，放置到正常上线钢包烘烤工位开始烘烤，烘烤火焰温度调整至1000℃，烘烤时间24小时以上；(3) Place the prepared ladle containing manganese alloy in the normal on-line ladle baking station to start baking, adjust the baking flame temperature to 1000°C, and bake for more than 24 hours;
    (二)：转炉出钢和出钢合金化：(2): Converter tapping and tapping alloying:
    (1)将烘烤好的合金钢包吊运至转炉出钢工位，接通钢包底吹，打开钢包底吹进行出钢，其出钢量＝标准钢包盛钢重量-烘烤锰合金的重量-1/3*标准钢包盛钢重量，转炉出钢温度1660℃-1700℃，出钢时间为3-5min；(1) Lift the baked alloy ladle to the converter tapping station, turn on the bottom blowing of the ladle, turn on the bottom blowing of the ladle to tap the steel, the tapping amount = the weight of the standard ladle holding steel-the weight of the baked manganese alloy -1/3*The weight of the standard ladle containing steel, the converter tapping temperature is 1660℃-1700℃, and the tapping time is 3-5min;
    (三)：LF化渣合金化：(3): LF slag alloying:
    (1)LF精炼炉升温合金化过程：(1) Heating alloying process of LF refining furnace:
    LF精炼炉电极加热升温，在流量为400-500NL/min大氩气下搅拌脱硫，大氩气搅拌加热升温合金化，将钢水温度提升至1580℃-1600℃，升温时间为60分钟以上；LF refining furnace electrode heating and heating, stirring and desulfurization under 400-500NL/min large argon gas, large argon gas stirring and heating, heating and alloying, raising the temperature of molten steel to 1580℃-1600℃, and the heating time is more than 60 minutes;
    (2)LF精炼炉大氩气搅拌降温合金化过程：(2) LF refining furnace large argon stirring and cooling alloying process:
    当钢水温度升至1580℃-1600℃后，停止升温操作，调整钢包底吹氩气流量至600NL/min，落下LF精炼炉钢包小炉盖，进行大氩气搅拌降温操作，钢水温度降低至1480℃后，合金化工作完成，停止大氩气搅拌，调整钢包底吹氩气流量至50-80NL/min继续搅拌15分钟，吊至连铸工位进行浇铸作业，在大氩气搅拌降温过程中取样测温，根据取样分析钢水中成分情况，若小于钢种要求成分范围，则加入合金进行钢水成分微调，逐步将钢水成分调整至钢种要求的成分范围内。When the temperature of molten steel rises to 1580°C-1600°C, stop the heating operation, adjust the flow of argon blowing at the bottom of the ladle to 600NL/min, drop the small furnace cover of the LF refining furnace ladle, and perform a large argon stirring and cooling operation, and the temperature of the molten steel is reduced to 1480 After ℃, the alloying work is completed, stop the large argon stirring, adjust the flow of argon blowing at the bottom of the ladle to 50-80NL/min and continue to stir for 15 minutes, hoist to the continuous casting station for casting operation, and during the cooling process of large argon stirring Sampling and temperature measurement, according to the sampling analysis of the composition of the molten steel, if it is less than the required composition range of the steel grade, add alloy to fine-tune the composition of the molten steel, and gradually adjust the composition of the molten steel to the required composition range of the steel grade.
  2. 根据权利要求1所述的低温用高锰奥氏体钢快速合金化工艺，其特征在于：准备钢包的包龄在总包龄三分之一之前。The high-manganese austenitic steel rapid alloying process for low temperature use according to claim 1, wherein the ladle age for preparing the ladle is before one third of the total ladle age.
  3. 根据权利要求1所述的低温用高锰奥氏体钢快速合金化工艺，其特征在于：在锰合金加入钢包后，在锰合金上面加入一层炼钢用石灰，石灰加入量8-10Kg/t钢。The high-manganese austenitic steel rapid alloying process for low temperature use according to claim 1, characterized in that: after the manganese alloy is added to the ladle, a layer of lime for steelmaking is added on the manganese alloy, and the lime addition amount is 8-10Kg/ t steel.
  4. 根据权利要求1所述的低温用高锰奥氏体钢快速合金化工艺，其特征在于：将烘烤好的合金钢包吊运至转炉出钢工位，接通钢包底吹，钢包底吹流量600-800Nl/min。The high-manganese austenitic steel rapid alloying process for low temperature use according to claim 1, characterized in that: the baked alloy ladle is hoisted to the converter tapping station, the ladle bottom blowing is turned on, and the flow rate of the ladle bottom blowing is 600-800Nl/min.
  5. 根据权利要求1所述的低温用高锰奥氏体钢快速合金化工艺，其特征在于：在大氩气搅拌降温过程中分批次加入石灰加速降温，每批次石灰加入1.5Kg/t，降温过程总加入量不大于6Kg/t。The high-manganese austenitic steel rapid alloying process for low temperature use according to claim 1, characterized in that: adding lime in batches to accelerate the cooling during the stirring and cooling process of large argon gas, and adding 1.5Kg/t of lime to each batch of lime. The total amount added in the cooling process is not more than 6Kg/t.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114032473A (en) * 2021-11-29 2022-02-11 东北大学 Alloy adding method of coating-free hot forming steel
CN114686784A (en) * 2022-04-02 2022-07-01 四川罡宸不锈钢有限责任公司 Nickel-saving austenitic stainless steel material and preparation method thereof
CN114908208A (en) * 2022-04-18 2022-08-16 包头钢铁（集团）有限责任公司 Method for smelting high alloy steel with Mn content of more than 12% by using converter end point temperature

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111974980A (en) * 2020-07-22 2020-11-24 南京钢铁股份有限公司 Alloy preheating process for smelting high alloy steel in converter steelmaking process
CN114317882A (en) * 2021-12-21 2022-04-12 中车长江铜陵车辆有限公司 Alloy baking method for duplex smelting

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002097516A (en) * 2000-09-21 2002-04-02 Kawasaki Steel Corp Method for melt-producing steel of high manganese content in vacuum degassing tank
WO2006061261A1 (en) * 2004-12-06 2006-06-15 F.A.R. - Fonderie Acciaierie Roiale - Spa Method to obtain a manganese steel alloy, and manganese steel alloy thus obtained
CN103882181A (en) * 2012-12-21 2014-06-25 鞍钢股份有限公司 Manganese-containing steel alloying process
JP2016065274A (en) * 2014-09-24 2016-04-28 Ｊｆｅスチール株式会社 Melting production method of low carbon high manganese steel
CN107586915A (en) * 2017-09-06 2018-01-16 东北大学 The alloyage process of manganese element in a kind of middle potassium steel
CN109750210A (en) * 2018-12-29 2019-05-14 广西长城机械股份有限公司 The production method of hypoxemia, hydrogen content potassium steel
CN110616362A (en) * 2019-09-30 2019-12-27 河钢股份有限公司 Steelmaking method of high manganese steel for low-temperature environment
CN110724792A (en) * 2019-09-30 2020-01-24 河钢股份有限公司 Smelting method for producing high manganese steel for low-temperature environment by using LF refining furnace

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000034545A (en) * 1998-07-14 2000-02-02 Daido Steel Co Ltd Austenitic heat resistant steel with improved hot workability, and its manufacture
CN105420440A (en) * 2014-09-19 2016-03-23 鞍钢股份有限公司 Alloy adding method for medium-manganese or high-manganese alloy steel in smelting with converters
CN105420446A (en) * 2014-09-22 2016-03-23 南京钢铁股份有限公司 Light treatment smelting method for ladle furnace (LF)

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002097516A (en) * 2000-09-21 2002-04-02 Kawasaki Steel Corp Method for melt-producing steel of high manganese content in vacuum degassing tank
WO2006061261A1 (en) * 2004-12-06 2006-06-15 F.A.R. - Fonderie Acciaierie Roiale - Spa Method to obtain a manganese steel alloy, and manganese steel alloy thus obtained
CN103882181A (en) * 2012-12-21 2014-06-25 鞍钢股份有限公司 Manganese-containing steel alloying process
JP2016065274A (en) * 2014-09-24 2016-04-28 Ｊｆｅスチール株式会社 Melting production method of low carbon high manganese steel
CN107586915A (en) * 2017-09-06 2018-01-16 东北大学 The alloyage process of manganese element in a kind of middle potassium steel
CN109750210A (en) * 2018-12-29 2019-05-14 广西长城机械股份有限公司 The production method of hypoxemia, hydrogen content potassium steel
CN110616362A (en) * 2019-09-30 2019-12-27 河钢股份有限公司 Steelmaking method of high manganese steel for low-temperature environment
CN110724792A (en) * 2019-09-30 2020-01-24 河钢股份有限公司 Smelting method for producing high manganese steel for low-temperature environment by using LF refining furnace

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114032473A (en) * 2021-11-29 2022-02-11 东北大学 Alloy adding method of coating-free hot forming steel
CN114686784A (en) * 2022-04-02 2022-07-01 四川罡宸不锈钢有限责任公司 Nickel-saving austenitic stainless steel material and preparation method thereof
CN114908208A (en) * 2022-04-18 2022-08-16 包头钢铁（集团）有限责任公司 Method for smelting high alloy steel with Mn content of more than 12% by using converter end point temperature
CN114908208B (en) * 2022-04-18 2023-09-26 包头钢铁（集团）有限责任公司 Method for smelting high alloy steel with Mn content of more than 12% by utilizing converter end temperature

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