CN107385139A - A kind of smelting process of high-carbon steel - Google Patents
A kind of smelting process of high-carbon steel Download PDFInfo
- Publication number
- CN107385139A CN107385139A CN201710635258.2A CN201710635258A CN107385139A CN 107385139 A CN107385139 A CN 107385139A CN 201710635258 A CN201710635258 A CN 201710635258A CN 107385139 A CN107385139 A CN 107385139A
- Authority
- CN
- China
- Prior art keywords
- carbon
- molten steel
- steel
- refining
- carburetting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- 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
- 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
- C21C7/10—Handling in a vacuum
Abstract
A kind of smelting process of high-carbon steel, processing step include：（1）It is 0.10% ~ 0.20% to bessemerize carbon content in terminal point control molten steel, and carbon content of the converter tapping process in molten steel adds suitable ferrosilicon, ferromanganese or manganese-silicon and carry out deoxidation alloying to molten steel；（2）The weak argon gas stirring of the big tank of tapping process, converter tapping process and refining, which are smelted, adjusts carbon to use low nitrogen carburant carburetting, and external refining L stoves F adjusts carbon amounts at 0.03%~0.05%, using carbon line carburetting；（3）CAS and LF refining process are stirred using weak argon gas, LF stove transmission process molten steel all standing operation；（4）Casting process controls big tank automatic jet and middle Baogang's liquid level to add insulation material all standing to operate.The present invention uses the low nitrogen carburant carburetting of novel low-cost, while by smelting process technique adjustment, not entering VD/RH applications of vacuum, nitrogen content reaches 25~40ppm on strand or material, can reduce production cost.
Description
Technical field
The invention belongs to method for making steel, is a kind of smelting process of high-carbon steel.
Background technology
The smelting of traditional high-carbon Series Steel, harmful element is typically removed by converter Strong oxdiative, tapping process and refined
Cheng Qiang deoxidations, and carburetting is carried out using carburant.Because conventional carburant nitrogen content is higher, tyre bead steel, cord steel and bearing
Steel etc. needs to carry out vacuumize process into VD/RH to nitrogen high request steel grade, reaches the requirement of drop nitrogen, and production cost is higher.
Conventional carburant mainly has petroleum coke and calcining coal, and carburant nitrogen content is respectively 0.50% and 0.32% or so, and
This two kinds of carburant prices are higher.It is minimum to need carburetting due to high-carbon steel such as tyre bead steel, cord steel, SWRH82B and bearing steels
0.60%, each about nitrogen pick-up 33ppm and 22ppm.Such as the pure graphite carburant that the enterprise such as Baosteel uses（Carbon content more than 99%）, nitrogen
Content is relatively low, but the market price is higher, is unfavorable for the control of production cost.Control nitrogen type carburant has the structure of class graphite, its
Burn-off rate is significantly higher than conventional petroleum Jiao carburant and calcining coal carburant, and carbon absorption rate is stable, and process is connected more
Efficiently, the more traditional carburant of its cost low 10%~15%, to realizing that efficient, the inexpensive smelting of variety steel has clear superiority.
Simultaneously by the control technology of external refining LF stoves and continuous casting protective casting, can be achieved not entering VD/RH applications of vacuum smelting control
Technology.Therefore high-carbon steel smelting technique provides technology for the production of high-carbon steel low-cost high-efficiency control nitrogen and ensured.
The content of the invention
It is an object of the invention to provide a kind of smelting process of high-carbon steel, by bessemerizing the control of terminal, using low
The control technology of the low nitrogen type carburetting material carburetting of cost, external refining stove and continuous casting protective casting, it is high to reach high-carbon steel low cost
The purpose of effect control nitrogen production.
Technical scheme：
A kind of smelting process of high-carbon steel, processing step include：
（1）It is 0.10% ~ 0.20% to bessemerize carbon content in terminal point control molten steel, and carbon of the converter tapping process in molten steel contains
Amount adds suitable ferrosilicon, ferromanganese or manganese-silicon and carries out deoxidation alloying to molten steel.
（2）The weak argon gas stirring of the big tank of tapping process, converter tapping process and refining are smelted and adjust carbon to be increased using low nitrogen carburant
Carbon, external refining L stoves F adjusts carbon amounts at 0.03%~0.05%, using carbon line carburetting.
（3）CAS and LF refining process are stirred using weak argon gas, LF stove transmission process molten steel all standing operation.
（4）Casting process controls big tank automatic jet and middle Baogang's liquid level to add insulation material all standing to operate.
Advantages of the present invention：By bessemerizing the control of terminal, tapping process uses low nitrogen carburant carburetting, and refining is led to
Cross weak argon gas stirring, LF stove transmission process molten steel all standing operation inhales nitrogen caused by reducing secondary oxidation and do not enter VD/RH vacuum
Processing, and the control of continuous casting protection pouring, strand nitrogen content can control below 40ppm, realize high-carbon steel low-cost high-efficiency
Control the purpose of nitrogen production.
Embodiment
Embodiment one：The smelting of TQ72A steel
Stove molten iron first carries out molten iron pretreatment, and molten steel sulfur content [S]=0.010% after processing, temperature=1282 DEG C, molten iron enters converter
Before slag must be taken off totally.Converter smelting adds molten iron and steel scrap, 81 tons of molten iron, 7.7 tons of steel scrap.Converter terminal control [C]=
0.11%, tapping process adds ferromanganese (FeMn) and ferrosilicon（FeSi）, and the big tank bottom of tapping process blows weak argon gas stirring, and add
0.64 ton of low-carbon carburant carburetting.
Molten steel enters CAS and LF slag making and the weak argon gas stirring of transmission process, and transmission process molten steel all standing operation, steel
Water calls in continuous casting, molten steel automatic jet, and middle Baogang's liquid level adds insulation material all standing to operate, and strand takes gas sample to detect nitrogen content
For 32ppm, testing result reaches requirement.
Embodiment two：The smelting of LX72A steel
Enter stove molten iron and first carry out molten iron pretreatment, molten steel sulfur content [S]=0.010% after processing, temperature=1286 DEG C, molten iron enter turn
Stokehold must take off slag totally.Converter smelting adds molten iron and steel scrap, 82.7 tons of molten iron, 7.25 tons of steel scrap.Converter terminal controls
[C]=0.15%, tapping process add ferromanganese (FeMn) and ferrosilicon（FeSi）, and the big tank bottom of tapping process blows weak argon gas stirring, and
Add 0.55 ton of low-carbon carburant carburetting.
Molten steel enters CAS and LF slag making and the weak argon gas stirring of transmission process, and transmission process molten steel all standing operation, steel
Water calls in continuous casting, molten steel automatic jet, and middle Baogang's liquid level adds insulation material all standing to operate, and strand takes gas sample to detect nitrogen content
For 28ppm, testing result reaches requirement.
Claims (1)
1. a kind of smelting process of high-carbon steel, processing step include：
（1）It is 0.10% ~ 0.20% to bessemerize carbon content in terminal point control molten steel, and carbon of the converter tapping process in molten steel contains
Amount adds suitable ferrosilicon, ferromanganese or manganese-silicon and carries out deoxidation alloying to molten steel；
（2）The weak argon gas stirring of the big tank of tapping process, converter tapping process and refining are smelted and adjust carbon to use low nitrogen carburant carburetting, stove
Outer refining L stoves F adjusts carbon amounts at 0.03%~0.05%, using carbon line carburetting；
CAS and LF refining process are stirred using weak argon gas, LF stove transmission process molten steel all standing operation；
Casting process controls big tank automatic jet and middle Baogang's liquid level to add insulation material all standing to operate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635258.2A CN107385139A (en) | 2017-07-30 | 2017-07-30 | A kind of smelting process of high-carbon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710635258.2A CN107385139A (en) | 2017-07-30 | 2017-07-30 | A kind of smelting process of high-carbon steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107385139A true CN107385139A (en) | 2017-11-24 |
Family
ID=60342226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710635258.2A Pending CN107385139A (en) | 2017-07-30 | 2017-07-30 | A kind of smelting process of high-carbon steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107385139A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251598A (en) * | 2018-01-12 | 2018-07-06 | 唐山钢铁集团有限责任公司 | A kind of carburetting control nitrogen production process of middle carbon high-alloy steel |
| CN113088628A (en) * | 2021-03-31 | 2021-07-09 | 山东钢铁股份有限公司 | LF refining method of low-carbon steel |
| CN114908282A (en) * | 2022-05-31 | 2022-08-16 | 本钢板材股份有限公司 | Production process for controlling oxygen and nitrogen content of SWRH42B carbon steel hot-rolled wire rod |
| WO2023151228A1 (en) * | 2022-02-10 | 2023-08-17 | 张家港荣盛特钢有限公司 | Method for controlling brittle inclusions of tire cord steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60234916A (en) * | 1984-05-08 | 1985-11-21 | Nisshin Steel Co Ltd | Manufacture of stainless steel containing low nitrogen |
| CN104004881A (en) * | 2014-06-13 | 2014-08-27 | 常州东大中天钢铁研究院有限公司 | Method for controlling nitrogen content in process of producing aluminium deoxidation high-carbon steel |
| CN104498805A (en) * | 2014-12-29 | 2015-04-08 | 首钢总公司 | Production method of high-carbon low-nitrogen steel for strand wires |
| CN106399632A (en) * | 2016-09-09 | 2017-02-15 | 武汉钢铁股份有限公司 | High-carbon steel recarburization method |
-
2017
- 2017-07-30 CN CN201710635258.2A patent/CN107385139A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60234916A (en) * | 1984-05-08 | 1985-11-21 | Nisshin Steel Co Ltd | Manufacture of stainless steel containing low nitrogen |
| CN104004881A (en) * | 2014-06-13 | 2014-08-27 | 常州东大中天钢铁研究院有限公司 | Method for controlling nitrogen content in process of producing aluminium deoxidation high-carbon steel |
| CN104498805A (en) * | 2014-12-29 | 2015-04-08 | 首钢总公司 | Production method of high-carbon low-nitrogen steel for strand wires |
| CN106399632A (en) * | 2016-09-09 | 2017-02-15 | 武汉钢铁股份有限公司 | High-carbon steel recarburization method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108251598A (en) * | 2018-01-12 | 2018-07-06 | 唐山钢铁集团有限责任公司 | A kind of carburetting control nitrogen production process of middle carbon high-alloy steel |
| CN108251598B (en) * | 2018-01-12 | 2020-05-05 | 唐山钢铁集团有限责任公司 | Carbon increasing and nitrogen controlling production method of medium-carbon high-alloy steel |
| CN113088628A (en) * | 2021-03-31 | 2021-07-09 | 山东钢铁股份有限公司 | LF refining method of low-carbon steel |
| WO2023151228A1 (en) * | 2022-02-10 | 2023-08-17 | 张家港荣盛特钢有限公司 | Method for controlling brittle inclusions of tire cord steel |
| CN114908282A (en) * | 2022-05-31 | 2022-08-16 | 本钢板材股份有限公司 | Production process for controlling oxygen and nitrogen content of SWRH42B carbon steel hot-rolled wire rod |
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Application publication date: 20171124 |