CN109837361A - A kind of RH simply connected technique of the anti-wadding stream of low-carbon unskilled steel - Google Patents
A kind of RH simply connected technique of the anti-wadding stream of low-carbon unskilled steel Download PDFInfo
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- CN109837361A CN109837361A CN201910256203.XA CN201910256203A CN109837361A CN 109837361 A CN109837361 A CN 109837361A CN 201910256203 A CN201910256203 A CN 201910256203A CN 109837361 A CN109837361 A CN 109837361A
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Abstract
A kind of anti-wadding stream RH simply connected technique of low-carbon unskilled steel, the control method of use are as follows: after natural decarburizing reaction, CaC2 is added in slag surface；Argon bottom-blowing is opened after RH application of vacuum, flow is controlled by 3-5Nm3.It can effectively improve low-carbon unskilled steel ladle middle and upper part Cleanliness of Molten Steel, control casting later period wadding flow problem, and then prevent unstable product quality caused by flowing because of wadding, replacement submersed nozzle, or even the casting discontinuity events caused.
Description
Technical field
The invention belongs to a kind of RH simply connected techniques of the anti-wadding stream of RH field of steel-making more particularly to low-carbon unskilled steel.
Background technique
At this stage, in the smelting process of mild steel, deoxidation alloying processing is not done after converter tapping, is hung to RH process,
During RH application of vacuum, using in molten steel oxygen and carbon nature decarburizing reaction occurs, until carbon content is down to pair in molten steel
It answers in the claimed range of steel grade, corresponding aluminium is added further according to last remaining oxygen and carries out deoxidation, it is ensured that molten steel deoxidation before casting
Completely.Because converter tapping process is without deoxidation alloying, oxygen content is higher in clinker, and oxidisability is stronger, in order to avoid in slag
Oxygen spread to molten steel, entire smelting process do not open argon bottom-blowing.When low-carbon unskilled steel RH simply connected continuous production, it will usually go out
There is a phenomenon where waddings to flow in continuous casting for certain existing heat, when wadding stream is lighter, needs replacing submersed nozzle；When wadding stream is serious, it will lead to
Casting is interrupted.Meanwhile Inner Quality of Billet not can guarantee yet.In order to solve low-carbon unskilled steel wadding flow problem, it is necessary to study
A kind of RH simply connected technique of the anti-wadding stream of low-carbon unskilled steel.
Summary of the invention
A kind of technical solution that the present invention uses for the above technical issues are as follows: anti-wadding stream RH simply connected of low-carbon unskilled steel
Technique, the control method of use are as follows:
(1) after natural decarburizing reaction, CaC2 is added in slag surface；
(2) argon bottom-blowing is opened after RH application of vacuum, flow is controlled by 3-5Nm3.
Specifically, after the natural decarburizing reaction, CaC2 is added in slag surface, i.e., in control method (1)
According to oxygen content residual in molten steel, while oxygen in the de- steel of aluminum shot is added, CaC220-40kg is added in slag surface, purpose exists
React in CaC2 with the oxygen in clinker and generate CaO, CO and CO2, deoxidation products will not secondary pollution molten steel, while improving clinker
Basicity.
Specifically, opening argon bottom-blowing, i.e. RH vacuum outgas after the RH application of vacuum in control method (2)
After being disposed and breaking sky, argon bottom-blowing is opened, flow is controlled by 3-5Nm3, micro- with the top of the slag according to the air permeability effect of bottom blowing brick
It moves as principle, its object is to pass through micro BOTTOM ARGON BLOWING bubble, promotes inclusion floating, especially promotion ladle middle and upper part molten steel
The floating of Large Inclusions, meanwhile, forbid to avoid that the oxygen in clinker is caused to spread into molten steel because argon flow is excessive.
Compared with prior art, the advantages and positive effects of the present invention are, propose a kind of anti-wadding of low-carbon unskilled steel
The RH simply connected technique of stream can effectively improve low-carbon unskilled steel ladle middle and upper part Cleanliness of Molten Steel, control wadding flow problem, in turn
Unstable product quality caused by preventing because of wadding stream, replacement submersed nozzle, or even the casting discontinuity events caused.
Specific embodiment
To better understand the objects, features and advantages of the present invention, below with reference to embodiment to this hair
It is bright to be described further.It should be noted that in the absence of conflict, the feature in embodiments herein and embodiment can
To be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other modes described herein are different from, therefore, the present invention is not limited to the specific of specification is described below
The limitation of embodiment.
A kind of anti-wadding stream RH simply connected technique of low-carbon unskilled steel, the control method of use are as follows:
(1) after natural decarburizing reaction, CaC2 is added in slag surface；
(2) argon bottom-blowing is opened after RH application of vacuum, flow is controlled by 3-5Nm3.
In control method (1), after the natural decarburizing reaction, CaC2 is added in slag surface, i.e., according to steel
While oxygen in the de- steel of aluminum shot is added, CaC220-40kg is added in slag surface, its object is to CaC2 in residual oxygen content in water
Reacted with the oxygen in clinker and generate CaO, CO and CO2, deoxidation products will not secondary pollution molten steel, while improving basicity of slag.
In control method (2), argon bottom-blowing is opened after the RH application of vacuum, i.e. RH Fruit storage finishes
And after broken sky, argon bottom-blowing is opened, flow is controlled by 3-5Nm3, according to the air permeability effect of bottom blowing brick, using top of the slag fine motion as principle,
Its object is to promote inclusion floating by micro BOTTOM ARGON BLOWING bubble, especially promotion ladle middle and upper part molten steel large size is mingled with
The floating of object, meanwhile, forbid to avoid that the oxygen in clinker is caused to spread into molten steel because argon flow is excessive.
The molten steel of low-carbon unskilled steel RH simply connected production, the wadding flow problem in casting process have obtained obvious control, most
Height even pours 16 furnaces, submersed nozzle replacement caused by not sent mistake is flowed because of wadding and casting discontinuity events.
Inventor is continuously improved and is innovated by the RH simply connected technique to a kind of anti-wadding stream of low-carbon unskilled steel, is fully considered
The influence and economic damage of unstable product quality caused by being flowed during to pouring molten steel because of wadding, replacement submersed nozzle to quality
It loses, the influence of even casting discontinuity events generation, it is ensured that on the basis of not changing former RH smelting process, effectively control ladle
Middle and upper part foreign substance in molten steel content, and then control the generation of wadding stream.
According to the above control method, in the treatment process of practical RH low-carbon unskilled steel, wadding flow problem has been substantially eliminated,
Steel quality is improved, production is stabilized, while also avoiding sentencing in useless and casting because of slab caused by replacing submersed nozzle
The generation of disconnected accident.
The present invention is to use CaC2Oxygen in de- slag, refining process of the low-carbon unskilled steel after converter tapping, what is taken is benefit
Natural reaction occurs with C with the oxygen in molten steel and carries out decarburization, carbon is taken off to mild steel, and clinker has extremely strong oxidation
Property, therefore, refining process cannot open bottom blowing (oxygen in slag is avoided to spread to molten steel).
The above described is only a preferred embodiment of the present invention, being not that the invention has other forms of limitations, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
It imitates embodiment and is applied to other fields, but without departing from the technical solutions of the present invention, according to the technical essence of the invention
Any simple modification, equivalent variations and remodeling to the above embodiments, still fall within the protection scope of technical solution of the present invention.
Claims (3)
1. a kind of anti-wadding of low-carbon unskilled steel flows RH simply connected technique, which is characterized in that the control method of use are as follows:
(1) after natural decarburizing reaction, CaC2 is added in slag surface；
(2) argon bottom-blowing is opened after RH application of vacuum, flow is controlled by 3-5Nm3.
2. the anti-wadding of a kind of low-carbon unskilled steel according to claim 1 flows RH simply connected technique, which is characterized in that in controlling party
In method (1), after the natural decarburizing reaction, CaC2 is added in slag surface, i.e., according to oxygen content residual in molten steel, is added
While aluminum shot takes off oxygen in steel, CaC220-40kg is added in slag surface, its object is to CaC2 to react life with the oxygen in clinker
At CaO, CO and CO2, deoxidation products will not secondary pollution molten steel, while improving basicity of slag.
3. the anti-wadding of a kind of low-carbon unskilled steel according to claim 1 flows RH simply connected technique, which is characterized in that in controlling party
In method (2), argon bottom-blowing is opened after the RH application of vacuum, i.e., after RH Fruit storage finishes and breaks sky, opens bottom
Blowing argon gas, flow are controlled by 3-5Nm3, and according to the air permeability effect of bottom blowing brick, using top of the slag fine motion as principle, its object is to pass through
Micro BOTTOM ARGON BLOWING bubble promotes inclusion floating, especially promotes the floating of ladle middle and upper part molten steel Large Inclusions, meanwhile,
Forbid to avoid that the oxygen in clinker is caused to spread into molten steel because argon flow is excessive.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910256203.XA CN109837361B (en) | 2019-04-01 | 2019-04-01 | RH single-connection process for preventing flocculation flow of low-carbon non-deoxidized steel |
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| CN201910256203.XA CN109837361B (en) | 2019-04-01 | 2019-04-01 | RH single-connection process for preventing flocculation flow of low-carbon non-deoxidized steel |
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| CN109837361B CN109837361B (en) | 2021-06-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112626416A (en) * | 2020-12-14 | 2021-04-09 | 山东钢铁集团日照有限公司 | Method for improving production efficiency in RH smelting of ultra-low carbon low alloy steel |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1310958A (en) * | 1969-07-08 | 1973-03-21 | Voest Ag | Methods for the production of steel having a low carbon content |
| JPS546806A (en) * | 1977-06-20 | 1979-01-19 | Taguchi Chobee | Continuous steel production of reduced pressure process |
| JPS5658919A (en) * | 1979-10-22 | 1981-05-22 | Nippon Steel Corp | Production of killed steel |
| EP0351762A2 (en) * | 1988-07-18 | 1990-01-24 | Kawasaki Steel Corporation | Process for producing high cleanness extra low carbon steel |
| KR20100035825A (en) * | 2008-09-29 | 2010-04-07 | 현대제철 주식회사 | Refining method of the molten steel for manufacturing ultra low carbon steel |
| CN102719600A (en) * | 2012-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Production method of ultra-low carbon steel |
| CN103266202A (en) * | 2013-06-11 | 2013-08-28 | 鞍钢股份有限公司 | Method for reducing flocculation flow of ultra-low carbon steel |
| CN103937926A (en) * | 2014-03-26 | 2014-07-23 | 江苏省沙钢钢铁研究院有限公司 | Production method of ultra-low carbon steel and ultra-low oxygen content molten steel |
| CN105821178A (en) * | 2016-03-24 | 2016-08-03 | 首钢总公司 | Smelting method for 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 |
| CN109082496A (en) * | 2018-08-09 | 2018-12-25 | 山东钢铁股份有限公司 | A kind of method of whole process hypoxemia position smelting suprelow carbon steel |
-
2019
- 2019-04-01 CN CN201910256203.XA patent/CN109837361B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1310958A (en) * | 1969-07-08 | 1973-03-21 | Voest Ag | Methods for the production of steel having a low carbon content |
| JPS546806A (en) * | 1977-06-20 | 1979-01-19 | Taguchi Chobee | Continuous steel production of reduced pressure process |
| JPS5658919A (en) * | 1979-10-22 | 1981-05-22 | Nippon Steel Corp | Production of killed steel |
| EP0351762A2 (en) * | 1988-07-18 | 1990-01-24 | Kawasaki Steel Corporation | Process for producing high cleanness extra low carbon steel |
| KR20100035825A (en) * | 2008-09-29 | 2010-04-07 | 현대제철 주식회사 | Refining method of the molten steel for manufacturing ultra low carbon steel |
| CN102719600A (en) * | 2012-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Production method of ultra-low carbon steel |
| CN103266202A (en) * | 2013-06-11 | 2013-08-28 | 鞍钢股份有限公司 | Method for reducing flocculation flow of ultra-low carbon steel |
| CN103937926A (en) * | 2014-03-26 | 2014-07-23 | 江苏省沙钢钢铁研究院有限公司 | Production method of ultra-low carbon steel and ultra-low oxygen content molten steel |
| CN105821178A (en) * | 2016-03-24 | 2016-08-03 | 首钢总公司 | Smelting method for 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 |
| CN109082496A (en) * | 2018-08-09 | 2018-12-25 | 山东钢铁股份有限公司 | A kind of method of whole process hypoxemia position smelting suprelow carbon steel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112626416A (en) * | 2020-12-14 | 2021-04-09 | 山东钢铁集团日照有限公司 | Method for improving production efficiency in RH smelting of ultra-low carbon low alloy steel |
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