CN109082496A - A kind of method of whole process hypoxemia position smelting suprelow carbon steel - Google Patents
A kind of method of whole process hypoxemia position smelting suprelow carbon steel Download PDFInfo
- Publication number
- CN109082496A CN109082496A CN201810902063.4A CN201810902063A CN109082496A CN 109082496 A CN109082496 A CN 109082496A CN 201810902063 A CN201810902063 A CN 201810902063A CN 109082496 A CN109082496 A CN 109082496A
- Authority
- CN
- China
- Prior art keywords
- furnace
- oxygen
- carbon steel
- hypoxemia
- converter
- 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.)
- Pending
Links
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
-
- 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
-
- 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
- C21C5/36—Processes yielding slags of special composition
-
- 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
- C21C7/0006—Adding metallic additives
-
- 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
- C21C7/06—Deoxidising, e.g. killing
-
- 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
- C21C7/068—Decarburising
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of methods of whole hypoxemia position smelting suprelow carbon steel.The chemical component mass percent of the invention ultra-low-carbon steel are as follows: C≤0.0030%；Si 0.01%；Mn 0.08~0.18%；P≤0.015%；S≤0.010%；Alsol0.015~0.055%, it uses KR stirring desulphurization-top and bottom combined blown converter-RH vacuum refining furnace-slab caster technique and smelts production.The present invention is using converter terminal hypoxemia full iron low with slag modification, the decarburization of RH furnace hypoxemia locating depth, conticaster full guard argon envelope and tundish ventilating seat brick Argon mode; full iron control is within 5% after slag modification; the control of terminal oxygen is in 350ppm or so after RH furnace depth decarburization; slab oxygen controls within 20ppm; field trash zero level ratio reaches 97% or more; RH furnace aim carbon controls within 20ppm, and conticaster even draws furnace number to reach 10 heats.The pourability and slab quality for ensuring the Ultra-low carbons steel grade such as DDQ grades of cold-rolled steels, improve steel inclusion quantity and form controlled level, effectively increase slab qualification rate.
Description
Technical field
The invention belongs to field of steel metallurgy, and in particular to a kind of method of whole process hypoxemia position smelting suprelow carbon steel.
Background technique
The market of steel product will be used wider and wider, to the reliability of its quality, the stability of performance and special
The requirement of index also becomes more urgent.Be to require with Molten Steel Cleanliness index, the quantity of nonmetallic inclusionsin steel, form and
Size distribution need to be effectively controlled, avoid steel generate raw edges, performance do not conform to, the mass defects such as crackle.It is traditional with molten steel
Ingredient is to smelt purpose technique not obviously being able to satisfy steel product quality requirement.
As steel mill is to the development & production of DDQ grades of deep-draw steel, quantity, continuous irrigatation castability, the stocking matter of foreign substance in molten steel
Amount is the key technology difficulty faced.Because such steel grade requires endpoint carbon content general control in 50ppm hereinafter, even lower,
System Absent measures difficulty is caused to increase.First is that converter smelting endpoint is difficult to control, it is high often to there is converter carbon hypoxemia high carbon-oxygen product
Situations such as, for converter terminal carbon 0.03% or so, oxygen content reaches 1000ppm or so, causes slag beneficiation strong, ladle top slag
Full iron reaches 20% or more, brings difficulty to the modification of ladle top slag；Second is that RH furnace is for deep decarburization, process Control for Oxygen Content
In hyperoxia position, the Control for Oxygen Content that enters the station Control for Oxygen Content after 500-600ppm or more, deep decarburization is high in 450-500ppm or more
Oxygen position is controlled to steel quality and continuous irrigatation castability, is produced bigger effect；Third is that in conticaster casting process molten steel secondary oxygen
Change expands this influence.Practice have shown that whole hyperoxia position control causes the subcutaneous pin hole of continuous casting sprue dross, slab, stocking raw edges etc.
Problems, slab qualification rate are lower.
Therefore, a kind of smelting, casting method that can overcome drawbacks described above, Improving The Quality of Products stability are needed.
Summary of the invention
The object of the present invention is to provide a kind of methods of whole hypoxemia position smelting suprelow carbon steel.Present invention ensures that DDQ
The pourability and slab quality problem of the Ultra-low carbons steel grades such as grade cold-rolled steel improve steel inclusion quantity and form control water
It is flat, effectively increase slab qualification rate.
To achieve the goals above, the invention adopts the following technical scheme:
First is that converter procedure improves the control of terminal all iron content and the modification effect of terminal clinker；Second is that RH vacuum fine
Furnace controls deep decarbonizing process molten steel total oxygen, and the polyoxy of crossing for reducing molten steel exists, and is further reduced foreign substance in molten steel
It generates；Third is that pouring molten steel process carries out full guard strict control, pressed from both sides using inert gas argon gas-sealed and argon bottom-blowing removal
Miscellaneous form further promotes Molten Steel Cleanliness.
Specifically, the method for a kind of whole hypoxemia position smelting suprelow carbon steel, the described method comprises the following steps:
1) converter reduces slag beneficiation, and carbon oxygen product controlled level is 0.0021~0.0024%, terminal Control for Oxygen Content
In 500-600ppm；
2) converter terminal is added 300~400kg/ of modification agent furnace and carries out slag modification；
3) RH furnace smelting process:
1. thermometric determines oxygen after 2~4min of circulation, when oxygen content: when between 450~550ppm, natural decarburization；Work as oxygen content
Less than 400ppm, 20~40Nm of oxygen blast3Carry out pressure decarburization；When oxygen content is greater than 600ppm, carbon dust deoxidation is added；Deoxygenation
The control of molten steel oxygen is in 340~360ppm before aurification；
2. after RH furnace is pressed again, 20~30kg aluminum shot and 150~200kg modification agent is added in the ladle top of the slag；
4) continuous casting process:
1. the big water-coating port argon envelope flow control of ladle is in 100~120L/min；
2. tundish ventilating seat brick flow is 10-15L/min；
3. tundish immersed nozzle argon jacket flow control is in 15~20L/min；
4. coverture covering is added uniformly, tightly in Metal in Tundish face, secondary oxidation of steel is reduced.
Preferably, the chemical component mass percent of the ultra-low-carbon steel are as follows: C≤0.0030%；Si 0.01%；Mn
0.08~0.18%；P≤0.015%；S≤0.010%；Alsol0.015~0.055%.
Preferably, converter smelting control furnace bottom amount of increase is no more than 100mm, it is ensured that bottom-blowing of converter effect.
Preferably, continuous casting tundish is poured using carbon-free tundish, and ultra-low-carbon steel casting control is in the tundish longevity
Life early period (pouring time the 13rd stokehold), reduces resistance to material and corrodes and pollute to molten steel.
Preferably, the modification agent matches by mass percentage are as follows: aluminum shot 30%, lime 10%, pre-melted slag 60%
Mixing match.
More specifically, a kind of method based on above-mentioned whole hypoxemia position smelting suprelow carbon steel, the method includes following steps
It is rapid:
1, converter procedure, the method that (1) rationally controls furnace bottom amount of increase, improves bottom blowing effect.Control furnace bottom amount of increase is no more than
100mm, it is ensured that bottom-blowing of converter effect.Dynamic grasps bottom blowing gas effect, judges whether bottom blowing effect meets by exposed quantity
It is required that.(2) optimization converter ultra-low-carbon steel smelts mode.High basicity slag is made in a converter.Lime adding amount is enough, and basicity control exists
3.5-4.B uses high-silicon high temperature molten iron, it is ensured that converter operates heat affluence, and process ore additional amount reaches 5 tons or more, it is ensured that complete
Journey slugging effect.A collection of lime is added before c terminal, is thickened clinker.TSO is measured in advance before d terminal, is adjusted and is supplied according to TSO temperature
Oxygen amount guarantees that converter terminal temperature at 1710 DEG C or so, guarantees to meet production requirement into RH temperature.Converter reduces slag oxidation
Property, carbon oxygen product controlled level is between 0.0021~0.0024%, and terminal Control for Oxygen Content is between 500-600ppm, aim carbon
Content is controlled in 0.04-0.05%, guarantees that oxygen content is met the requirements；(3) converter terminal be added 300~400kg/ of modification agent furnace into
Row slag modification, modification agent are matched according to mass percent are as follows: the mixing of aluminum shot 30%, lime 10%, pre-melted slag 60%
Proportion；
2, RH process, 1. thermometric determines oxygen after circulation 3min, when oxygen content: when between 450~550ppm, natural decarburization；When
Oxygen content is less than 400ppm, 20~40Nm of oxygen blast3Carry out pressure decarburization；When oxygen content is greater than 600ppm, carbon dust is added and sloughs
Extra oxygen, 10kg carbon dust take off 100ppm oxygen.The control of molten steel oxygen is in 350ppm or so before deoxidation alloying；After 2. RH furnace is pressed again,
The top of the slag is added 20~30kg aluminum shot and 150~200kg modification agent, modification agent and matches according to mass percent are as follows: aluminum shot 30%,
The mixing match of grain lime 10%, pre-melted slag 60%；3. outlet temperature controls between 1595~1600 DEG C；
3) continuous casting working procedure, 1. the envelope flow control of ladle big water-coating port argon is in 100~120L/min, 2. tundish ventilating seat brick
Flow be 10-15L/min 3. the flow control of tundish immersed nozzle argon jacket in 15~20L/min；4. Metal in Tundish face
Coverture covering is added uniformly, tightly, reduces secondary oxidation of steel；5. basket pouring temperature control 1562-1572 DEG C it
Between.
Present invention employs KR stirring desulphurization-top and bottom combined blown converter-RH vacuum refining furnace-slab caster technique smeltings
Refining production.The present invention uses converter terminal hypoxemia full iron low with slag modification, the hypoxemia locating depth decarburization of RH furnace and conticaster all risk insurance
Protect argon envelope and tundish ventilating seat brick mode, it is ensured that the pourability and slab quality of the Ultra-low carbons steel grade such as DDQ grades of cold-rolled steels,
Steel inclusion quantity and form controlled level are improved, slab qualification rate is effectively increased.
The present invention uses converter terminal hypoxemia full iron low with slag modification, the decarburization of RH furnace hypoxemia locating depth, conticaster full guard
Argon seals and tundish ventilating seat brick Argon mode, and full iron control is within 5% after slag modification, terminal oxygen control after RH furnace depth decarburization
System controls within 20ppm in 350ppm or so, slab oxygen, and field trash zero level ratio reaches 97% or more, RH furnace aim carbon control
For system within 20ppm, conticaster even draws furnace number to reach 10 heats.
The present invention is suitable for all mild steel and the production of ultra-low-carbon steel is smelted.
Specific embodiment
Any feature is disclosed to obtain in this specification, it unless specifically stated, can be equivalent or with similar purpose by other
Alternative features are replaced.Unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
?.It is described to understand the present invention just for the sake of help, it should not be considered as to concrete restriction of the invention.
Each case study on implementation of the present invention executes according to the following steps:
1, converter procedure: the method for 1. rationally controlling furnace bottom amount of increase, improving bottom blowing effect.Control furnace bottom amount of increase is no more than
100mm, it is ensured that bottom-blowing of converter effect.Dynamic grasps bottom blowing gas effect, judges whether bottom blowing effect meets by exposed quantity
It is required that.2. optimizing converter ultra-low-carbon steel smelts mode.High basicity slag is made in a converter.Lime adding amount is enough, and basicity is controlled in 3.5-
4.B uses high-silicon high temperature molten iron, it is ensured that converter operates heat affluence, and process ore additional amount reaches 5 tons or more, it is ensured that full range
Slag effect.A collection of lime is added before c terminal, is thickened clinker.TSO is measured in advance before d terminal, and oxygen-supplying amount is adjusted according to TSO temperature,
Guarantee that converter terminal temperature at 1710 DEG C or so, guarantees to meet production requirement into RH temperature.Converter reduces slag beneficiation, carbon oxygen
Product controlled level is between 0.0021~0.0024%, and terminal Control for Oxygen Content is between 500-600ppm, endpoint carbon content control
System guarantees that oxygen content is met the requirements in 0.04-0.05%；3. terminal is added 300~400kg/ of modification agent furnace and carries out slag modification,
Modification agent is matched according to mass percent are as follows: aluminum shot 30%, lime 10%, pre-melted slag 60% mixing match；
2, RH process: 1. thermometric determines oxygen after circulation 3min, when oxygen content: when between 450~550ppm, natural decarburization；When
Oxygen content is less than 400ppm, 20~40m of oxygen blast3Carry out pressure decarburization；When oxygen content is greater than 600ppm, addition carbon dust is sloughed more
Remaining oxygen, 10kg carbon dust take off 100ppm oxygen.The control of molten steel oxygen is in 350ppm or so before deoxidation alloying；After 2. RH furnace is pressed again, in slag
20~30kg aluminum shot+150~200kg modification agent is added in face, and modification agent is matched according to mass percent are as follows: aluminum shot 30%, particle
The mixing match of lime 10%, pre-melted slag 60%；3. outlet temperature controls between 1595~1600 DEG C.
3, continuous casting working procedure: 1. the envelope flow control of ladle big water-coating port argon is in 100~120L/min, 2. tundish ventilating seat brick
Flow is that 3. tundish immersed nozzle argon seals flow control in 15~20L/min to 10-15L/min；4. Metal in Tundish face
Coverture covering is added uniformly, tightly, reduces secondary oxidation of steel；5. basket pouring temperature control 1562-1572 DEG C it
Between.
Continuous casting tundish is poured using carbon-free tundish, and ultra-low-carbon steel casting control is in tundish work life early period
(pouring time the 13rd stokehold) is reduced resistance to material and is corroded and pollute to molten steel.
Ladle slag modification situation is as shown in table 1；Oxygen content and aim carbon situation such as table 2 before RH vacuum refining furnace alloying
It is shown；Hypoxemia position smelting suprelow carbon steel Specifications are as shown in table 3；
1 slag modification effect of table
Oxygen content and aim carbon situation before table 2RH vacuum refining furnace alloying
3 hypoxemia position smelting suprelow carbon steel Specifications of table
Using smelting process method of the present invention, full iron control is within 5% after slag modification, terminal oxygen after RH furnace depth decarburization
Control controls within 20ppm in 350ppm or so, slab oxygen, and field trash zero level ratio reaches 97% or more, RH furnace aim carbon
Within 20ppm, conticaster even draws furnace number to reach 10 heats for control.
From the above results, using this smelting, casting method, molten steel composition can satisfy Ultra-low carbon steel grade requirement, together
When realize from converter-RH furnace-conticaster whole process hypoxemia position production model, foreign substance in molten steel significantly reduces, pourability of molten steel
It significantly improves, slab, mill bar quality are preferable, and performance is stablized.
Technological parameter (such as temperature, time) section bound value of the invention and interval value can realize this law,
Embodiment numerous to list herein.
Ordinary skill in the art knowledge can be used in the unspecified content of the present invention.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, it will be apparent to an ordinarily skilled person in the art that technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (5)
1. a kind of method of whole process hypoxemia position smelting suprelow carbon steel, the described method comprises the following steps:
1) converter reduces slag beneficiation, and 0.0021~0.0024%, terminal Control for Oxygen Content exists carbon oxygen product controlled level
500-600ppm；
2) converter terminal is added 300~400kg/ of modification agent furnace and carries out slag modification；
3) RH furnace smelting process:
1. thermometric determines oxygen after 2~4min of circulation, when oxygen content: when between 450~550ppm, natural decarburization；When oxygen content is less than
400ppm, 20~40Nm of oxygen blast3Carry out pressure decarburization；When oxygen content is greater than 600ppm, carbon dust deoxidation is added；Deoxidation alloying
Preceding molten steel oxygen control is in 340~360ppm；
2. after RH furnace is pressed again, 20~30kg aluminum shot and 150~200kg modification agent is added in the ladle top of the slag；
4) continuous casting process:
1. the big water-coating port argon envelope flow control of ladle is in 100~120L/min；
2. tundish ventilating seat brick flow is 10-15L/min；
3. tundish immersed nozzle argon jacket flow control is in 15~20L/min；
4. coverture covering is added uniformly, tightly in Metal in Tundish face, secondary oxidation of steel is reduced.
2. a kind of method of whole hypoxemia position smelting suprelow carbon steel according to claim 1, which is characterized in that described ultralow
The chemical component mass percent of carbon steel are as follows: C≤0.0030%；Si 0.01%；Mn 0.08~0.18%；P≤0.015%；S
≤ 0.010%；Alsol0.015~0.055%.
3. a kind of method of whole hypoxemia position smelting suprelow carbon steel according to claim 1, which is characterized in that converter smelting
It controls furnace bottom amount of increase and is no more than 100mm, it is ensured that bottom-blowing of converter effect.
4. a kind of method of whole hypoxemia position smelting suprelow carbon steel according to claim 1, which is characterized in that in conticaster
Between packet be poured using carbon-free tundish, ultra-low-carbon steel casting control is in tundish work life early period.
5. a kind of method of whole hypoxemia position smelting suprelow carbon steel according to claim 1, which is characterized in that the modification
Agent matches by mass percentage are as follows: aluminum shot 30%, lime 10%, pre-melted slag 60% mixing match.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810902063.4A CN109082496A (en) | 2018-08-09 | 2018-08-09 | A kind of method of whole process hypoxemia position smelting suprelow carbon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810902063.4A CN109082496A (en) | 2018-08-09 | 2018-08-09 | A kind of method of whole process hypoxemia position smelting suprelow carbon steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109082496A true CN109082496A (en) | 2018-12-25 |
Family
ID=64834033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810902063.4A Pending CN109082496A (en) | 2018-08-09 | 2018-08-09 | A kind of method of whole process hypoxemia position smelting suprelow carbon steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109082496A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439843A (en) * | 2018-12-29 | 2019-03-08 | 首钢集团有限公司 | A kind of ultra-low-carbon steel smelting control method |
| CN109735677A (en) * | 2018-12-10 | 2019-05-10 | 北京首钢股份有限公司 | A kind of smelting process reducing high-aluminum steel nozzle blocking probability |
| CN109837361A (en) * | 2019-04-01 | 2019-06-04 | 山东钢铁集团日照有限公司 | A kind of RH simply connected technique of the anti-wadding stream of low-carbon unskilled steel |
| CN110079724A (en) * | 2019-06-12 | 2019-08-02 | 中天钢铁集团有限公司 | A kind of Ultra Low-oxygen middle low carbon steel smelting process |
| CN112626312A (en) * | 2020-12-14 | 2021-04-09 | 山东钢铁集团日照有限公司 | Low-carbon aluminum killed steel Al for reducing RH single process2O3Method of inclusion |
| CN113862428A (en) * | 2021-08-19 | 2021-12-31 | 山东钢铁集团日照有限公司 | Ultra-low carbon steel smelting method |
| CN113862424A (en) * | 2021-08-23 | 2021-12-31 | 山东钢铁集团日照有限公司 | Method for reducing ultra-low carbon steel water gap |
| CN115141904A (en) * | 2022-07-05 | 2022-10-04 | 江苏省沙钢钢铁研究院有限公司 | Continuous casting billet for preparing low-carbon cold-rolled substrate and smelting process thereof |
| CN115305411A (en) * | 2022-08-15 | 2022-11-08 | 马鞍山钢铁股份有限公司 | Method for efficiently producing ultra-deep drawing cold-rolled enamel steel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743925A (en) * | 1980-08-30 | 1982-03-12 | Kawasaki Steel Corp | Production of extra-low-carbon extra-low-nitrogen high-chromium steel |
| JPH04198413A (en) * | 1990-11-29 | 1992-07-17 | Nippon Steel Corp | Manufacture of dead soft steel |
| CN101760581A (en) * | 2009-12-30 | 2010-06-30 | 首钢总公司 | Production process for smelting high-level low-carbon steel at low cost |
| CN102719600A (en) * | 2012-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Production method of ultra low carbon steel |
| CN106636534A (en) * | 2016-11-25 | 2017-05-10 | 北京首钢股份有限公司 | Method for controlling ratio of calcium to aluminum of auto sheet ladle top slag to be 1.2-1.8 |
| CN107354269A (en) * | 2017-05-26 | 2017-11-17 | 内蒙古包钢钢联股份有限公司 | The method that RH complex deoxidizations produce ultra-low-carbon steel |
| CN107663562A (en) * | 2017-09-27 | 2018-02-06 | 武汉钢铁有限公司 | The increased method of silicone content is prevented during Ultra-low carbon ultra-low silicon steel smelting |
-
2018
- 2018-08-09 CN CN201810902063.4A patent/CN109082496A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743925A (en) * | 1980-08-30 | 1982-03-12 | Kawasaki Steel Corp | Production of extra-low-carbon extra-low-nitrogen high-chromium steel |
| JPH04198413A (en) * | 1990-11-29 | 1992-07-17 | Nippon Steel Corp | Manufacture of dead soft steel |
| CN101760581A (en) * | 2009-12-30 | 2010-06-30 | 首钢总公司 | Production process for smelting high-level low-carbon steel at low cost |
| CN102719600A (en) * | 2012-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Production method of ultra low carbon steel |
| CN106636534A (en) * | 2016-11-25 | 2017-05-10 | 北京首钢股份有限公司 | Method for controlling ratio of calcium to aluminum of auto sheet ladle top slag to be 1.2-1.8 |
| CN107354269A (en) * | 2017-05-26 | 2017-11-17 | 内蒙古包钢钢联股份有限公司 | The method that RH complex deoxidizations produce ultra-low-carbon steel |
| CN107663562A (en) * | 2017-09-27 | 2018-02-06 | 武汉钢铁有限公司 | The increased method of silicone content is prevented during Ultra-low carbon ultra-low silicon steel smelting |
Non-Patent Citations (1)
| Title |
|---|
| 周剑丰等: "RH工序脱碳速率因素浅析", 《涟钢科技与管理》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735677A (en) * | 2018-12-10 | 2019-05-10 | 北京首钢股份有限公司 | A kind of smelting process reducing high-aluminum steel nozzle blocking probability |
| CN109439843A (en) * | 2018-12-29 | 2019-03-08 | 首钢集团有限公司 | A kind of ultra-low-carbon steel smelting control method |
| CN109837361A (en) * | 2019-04-01 | 2019-06-04 | 山东钢铁集团日照有限公司 | A kind of RH simply connected technique of the anti-wadding stream of low-carbon unskilled steel |
| CN110079724A (en) * | 2019-06-12 | 2019-08-02 | 中天钢铁集团有限公司 | A kind of Ultra Low-oxygen middle low carbon steel smelting process |
| CN112626312A (en) * | 2020-12-14 | 2021-04-09 | 山东钢铁集团日照有限公司 | Low-carbon aluminum killed steel Al for reducing RH single process2O3Method of inclusion |
| CN112626312B (en) * | 2020-12-14 | 2022-09-20 | 山东钢铁集团日照有限公司 | Low-carbon aluminum killed steel Al for reducing RH single process 2 O 3 Method of inclusion |
| CN113862428A (en) * | 2021-08-19 | 2021-12-31 | 山东钢铁集团日照有限公司 | Ultra-low carbon steel smelting method |
| CN113862424A (en) * | 2021-08-23 | 2021-12-31 | 山东钢铁集团日照有限公司 | Method for reducing ultra-low carbon steel water gap |
| CN115141904A (en) * | 2022-07-05 | 2022-10-04 | 江苏省沙钢钢铁研究院有限公司 | Continuous casting billet for preparing low-carbon cold-rolled substrate and smelting process thereof |
| CN115141904B (en) * | 2022-07-05 | 2023-09-22 | 江苏省沙钢钢铁研究院有限公司 | Continuous casting blank for preparing low-carbon cold-rolled substrate and smelting process thereof |
| CN115305411A (en) * | 2022-08-15 | 2022-11-08 | 马鞍山钢铁股份有限公司 | Method for efficiently producing ultra-deep drawing cold-rolled enamel steel |
| CN115305411B (en) * | 2022-08-15 | 2024-02-06 | 马鞍山钢铁股份有限公司 | Method for efficiently producing ultra-deep drawing cold-rolled enamel steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109082496A (en) | A kind of method of whole process hypoxemia position smelting suprelow carbon steel | |
| CN103741006B (en) | A kind of preparation method containing the low nitrogen stainless steel of Ti | |
| KR20130025383A (en) | Method for controlling titanium content in ultra-low carbon killed steel | |
| CN105603156B (en) | The production method of super-low sulfur IF steel | |
| CN104789859B (en) | Method for producing peritectic steel by using medium-thin slab continuous caster | |
| CN102409238A (en) | 42CrMo alloy constructional steel super-thick plate and production method thereof | |
| CN106011381B (en) | A kind of molten steel extra furnace dephosphorization production technology | |
| CN108220530A (en) | The sublimate method of low carbon high alloy steel | |
| CN103642970A (en) | Smelting method of low-carbon aluminum killed steel | |
| CN107130168A (en) | Utilize the austenitic stainless steel and its production technology of smelting laterite-nickel ores | |
| CN107201422A (en) | A kind of production method of mild steel | |
| CN106498110B (en) | A kind of smelting process of oil/gas well expansion pipe steel | |
| CN104264053B (en) | The neodymium iron boron production method of pure iron as raw material bar | |
| CN105483501A (en) | Method for smelting phosphorus-containing ultra-low carbon steel | |
| CN114318154A (en) | High-cleanliness welding wire steel L-S3 and preparation method thereof | |
| CN103571999A (en) | Method for smelting nitrogen-controlling martensite stainless steel through total molten iron | |
| CN105002324B (en) | A kind of method for controlling Properties of Heavy Rail Steel point-like inclusion | |
| CN103695601B (en) | Processing method of molten steel used for checkered plate smelted in converter | |
| CN107502704B (en) | Method for reducing alumina inclusions in semisteel steelmaking casting blank | |
| CN102758128B (en) | Method for producing deep-draw hot-rolled strip steel by micro carbon aluminium killed steel | |
| CN114293101B (en) | Economical high-grade welding wire steel H04E and preparation method thereof | |
| CN113584259B (en) | Method for washing RH furnace | |
| CN115305411A (en) | Method for efficiently producing ultra-deep drawing cold-rolled enamel steel | |
| CN104928575A (en) | 355MPa-stage automotive cold forming galvanized hot-rolled substrate and production method thereof | |
| CN103031488B (en) | Manufacturing method of hot rolled steel and hot rolled steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181225 |
|
| RJ01 | Rejection of invention patent application after publication |