CN101603115A - A kind of technology that hydrogen is used for steel liquid deoxidation - Google Patents
A kind of technology that hydrogen is used for steel liquid deoxidation Download PDFInfo
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- CN101603115A CN101603115A CNA2009100630984A CN200910063098A CN101603115A CN 101603115 A CN101603115 A CN 101603115A CN A2009100630984 A CNA2009100630984 A CN A2009100630984A CN 200910063098 A CN200910063098 A CN 200910063098A CN 101603115 A CN101603115 A CN 101603115A
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- steel
- deoxidation
- molten steel
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Abstract
The present invention relates to a kind of technology that hydrogen is used for steel liquid deoxidation.Its technical scheme is: when the Converter Oxigen Blowing decarburization finishes or during ladle refining or RH when producing the ultra low-carbon steel oxygen decarburization and finishing, with H
2Or Ar-H
2Mixed gas be blown into deoxidation in the molten steel, mixed gas flow is 40～3000m
3/ h, pressure is 0.5～2.0MPa, the time that is blown into molten steel is 5～30min.Blow the hydrogen deoxidation when finishing at converter or ladle or RH, remove the hydrogen that is dissolved in the steel by Argon and vacuum-treat.Wherein: being blown in the molten steel deoxidation is to be blown at the RH upcast from ladle bottom or by gas permeable brick from the top and bottom combined blown converter bottom or by gas permeable brick by gas permeable brick to carry out deoxidation the molten steel; At Ar-H
2Mixed gas in, the volume content of Ar is 10～80%, H
2Volume content be 20～90%.The present invention have technology simple, can reduce deoxidation to the molten steel pollution characteristics, remove with this technology that oxygen can effectively improve molten steel cleanness and steel product quality in the steel.
Description
Technical field
The invention belongs to the steel liquid deoxidation technical field.Be specifically related to a kind of technology that hydrogen is used for steel liquid deoxidation.
Background technology
In STEELMAKING PRODUCTION, oxygen and the existence form in steel thereof have very big influence to the performance of steel.Along with the progress and the development of science and technology of society, the performance requriements of steel is improved day by day.How to reduce the oxygen level in the molten steel, improve the cleanliness factor of steel, more and more pay close attention to for the metallargist.
Traditional method of deoxidation mainly is to use the direct deoxidation of reductor.The shortcoming of this method of deoxidation is that deoxidation products remains in the pollution that has caused in the molten steel molten steel.And the oxide inclusion that the inclusion in the molten steel, especially deoxidation generate directly has influence on the quality of steel.Although taked the kinds of processes means to remove inclusion, still can't thoroughly avoid the pollution of deoxidation products to molten steel.Therefore, how to reduce deoxidation the method for deoxidation that molten steel pollutes is become very important.
Summary of the invention
The purpose of this invention is to provide a kind of production technique simple, can reduce that deoxidation is polluted molten steel and a kind of technology that hydrogen is used for steel liquid deoxidation of decarburization.Remove the quality that oxygen in the steel can effectively improve molten steel cleanness and steel with this technology.
For achieving the above object, the technical solution used in the present invention is: when the Converter Oxigen Blowing decarburization finishes or during ladle refining or RH when producing the ultra low-carbon steel oxygen decarburization and finishing, with H
2Or Ar-H
2Mixed gas be blown into and carry out deoxidation, H in the molten steel
2Or Ar-H
2Mixed gas flow be 40～3000m
3/ h, pressure are 0.5～2.0MPa, and the time that mixed gas is blown into molten steel is 5～30min.Blow the hydrogen deoxidation when finishing at converter or ladle or RH, remove the hydrogen that is dissolved in the steel by Argon and vacuum-treat.
Wherein: be blown into that to carry out deoxidation in the molten steel be to be blown at the RH upcast from ladle bottom or by gas permeable brick from top and bottom combined blown converter bottom or by gas permeable brick by gas permeable brick to carry out deoxidation the molten steel; At Ar-H
2Mixed gas in, the volume content of Ar is 10～80%, H
2Volume content be 20～90%.
Because adopt technique scheme, the present invention blows H in molten steel
2In the deoxidation process, the hydrogen that is blown into forms bubble hydrogen in molten steel, and [O] in the molten steel is diffused into bubble-molten steel interface from liquid phase region, with H
2Chemical reaction takes place generate H
2O.The gasiform product is discharged molten steel with mobile gas after entering gas phase, can avoid the disadvantageous effect of deoxidation products to steel product quality.
In addition, carry out the deoxidation of bottom blowing hydrogen in converter and ladle, the stirring of bubble also has the decarburization effect, can be used for the production of high cleanliness, soft steel; When RH blows the hydrogen deoxidation, because H
2Can remove the oxygen in the steel, reduce that surface active element [O] helps the carrying out of denitrification reaction to the obstruction of molten steel denitrogenation in the steel.Simultaneously, the hydrogen evolution that is dissolved in vacuum chamber in the molten steel generates small bubble, makes the reaction interface of decarburizing reaction increase, and quickens the carrying out of decarburizing reaction.
Blow the hydrogen deoxidation when finishing at converter or ladle or RH, hydrogen can be dissolved in the molten steel, removes the hydrogen that is dissolved in the steel by Argon and vacuum-treat, can avoid blowing hydrogen and cause harm to steel.
Therefore, the present invention have production technique simple, can reduce deoxidation to the molten steel pollution characteristics.Remove the quality that oxygen in the steel can effectively improve molten steel cleanness and steel with this technology, can be used for the production of high cleanliness, Ultra-low carbon low nitrogen steel.
Embodiment
Below in conjunction with embodiment the present invention being further described, is not the restriction to protection domain.
Embodiment 1
A kind of technology that hydrogen is used for steel liquid deoxidation.Produce soft steel in the 200t converter, when oxygen decarburization finishes with H
2Be blown into and carry out deoxidation in the molten steel, be blown into that to carry out deoxidation in the molten steel be with H
2Be blown into from top and bottom combined blown converter bottom by gas permeable brick and carry out deoxidation the molten steel.H
2Flow is 300～1800m
3/ h, pressure 0.5～1.5MPa, the time that is blown into molten steel is 10～30min.
When hydrogen deoxidation end is blown in converter, remove the hydrogen that is dissolved in the steel by Argon and vacuum-treat.
Embodiment 2
A kind of technology that hydrogen is used for steel liquid deoxidation.Produce soft steel in the 300t converter, when oxygen decarburization finishes with Ar-H
2Mixed gas be blown into and carry out deoxidation, Ar-H in the molten steel
2Mixed gas flow be 800～3000m
3/ h, pressure are 0.5～1.0MPa, and the time that mixed gas is blown into molten steel is 5～20min.
When hydrogen deoxidation end is blown in converter, remove the hydrogen that is dissolved in the steel by Argon and vacuum-treat.
In the present embodiment: be blown into that to carry out deoxidation in the molten steel be with Ar-H
2Mixed gas be blown into from top and bottom combined blown converter bottom by gas permeable brick and carry out deoxidation the molten steel; At Ar-H
2In the gas mixture, the volume content of Ar is 10～50%, H
2Volume content be 50～90%.
Embodiment 3
A kind of technology that hydrogen is used for steel liquid deoxidation.When producing aluminium killed steel, in the 200t ladle with H
2Be blown in the molten steel of alloying not and carry out deoxidation, be blown into that to carry out deoxidation in the molten steel be with H
2Gas permeable brick by the bottom is blown into and carries out deoxidation in the molten steel.H
2Flow is 40～200m
3/ h, pressure are 0.5～1.5MPa, H
2The time that is blown into molten steel is 10～30min.When ladle blows hydrogen deoxidation end, remove the hydrogen that is dissolved in the steel by Argon and vacuum-treat.
Embodiment 4
A kind of technology that hydrogen is used for steel liquid deoxidation.When producing aluminium killed steel, in the 300t ladle with Ar-H
2Gas mixture is blown into and carries out deoxidation, Ar-H in the molten steel
2Mixed gas flow is 40～500m
3/ h, pressure is 1.0～2.0MPa, the time that is blown into molten steel is 5～20min.
In the present embodiment: be blown into that to carry out deoxidation in the molten steel be with Ar-H
2The gas permeable brick of mixed gas by the bottom be blown into and carry out deoxidation in the molten steel; Ar-H
2Mixed gas in, the volume content of Ar is 10～50%, H
2Volume content be 50～90%.At ladle or blow the hydrogen deoxidation when finishing, remove the hydrogen that is dissolved in the steel by Argon and vacuum-treat.
Embodiment 5
A kind of technology that hydrogen is used for steel liquid deoxidation.When the RH of 200t produces the end of non orientating silicon steel oxygen decarburization, with H
2Be blown into and carry out deoxidation in the molten steel, be blown into that to carry out deoxidation in the molten steel be with H
2Be blown at upcast by gas permeable brick and carry out deoxidation in the molten steel.H
2Flow is 80～300m
3/ h, pressure is 0.8～1.5MPa, the time that is blown into molten steel is 10～30min.When RH blows hydrogen deoxidation end, remove the hydrogen that is dissolved in the steel by Argon and vacuum-treat.
Embodiment 6
A kind of technology that hydrogen is used for steel liquid deoxidation.When the RH of 300t produces the end of IF steel oxygen decarburization, with Ar-H
2Mixed gas be blown into and carry out deoxidation, Ar-H in the molten steel
2Mixed gas flow be 100～500m
3/ h, pressure is 1.0～2.0MPa, blowing mixed gas, to go into the time of molten steel be 5～20min.When RH blows hydrogen deoxidation end, remove the hydrogen that is dissolved in the steel by Argon and vacuum-treat.
In the present embodiment: be blown into that to carry out deoxidation in the molten steel be with Ar-H
2Gas mixture is blown at upcast by gas permeable brick and carries out deoxidation in the molten steel; Ar-H
2Mixed gas in the volume content of Ar be 40～80%, H
2Volume content be 20～60%.
In molten steel, blow H in the present embodiment 1～6
2Or Ar-H
2The mixed gas deoxidation process in, the hydrogen that is blown into forms bubble hydrogen in molten steel, [O] in the steel is diffused into bubble-molten steel interface from liquid phase region, with H
2Chemical reaction takes place generate H
2O.The gasiform product is discharged molten steel with mobile gas after entering gas phase, can avoid the disadvantageous effect of deoxidation products to steel product quality.
Carry out the deoxidation of bottom blowing hydrogen in the converter of embodiment 1～4 and ladle, the stirring of bubble also has the decarburization effect, can be used for the production of high cleanliness, soft steel; Embodiment 5～6 when RH blows the hydrogen deoxidation, because H
2Can remove the oxygen in the steel, reduce that surface active element [O] helps the carrying out of denitrification reaction to the obstruction of molten steel denitrogenation in the steel.Simultaneously, the hydrogen evolution that is dissolved in vacuum chamber in the molten steel generates small bubble, makes the reaction interface of decarburizing reaction increase, and quickens the carrying out of decarburizing reaction.Can be used for the production of high cleanliness, Ultra-low carbon low nitrogen steel.
Blow the hydrogen deoxidation when finishing at converter or ladle or RH, hydrogen can be dissolved in molten steel, removes the hydrogen that is dissolved in the steel by Argon and vacuum-treat, can avoid blowing hydrogen and cause harm to steel.
Therefore, this embodiment have production technique simple, can reduce deoxidation to the molten steel pollution characteristics, remove the quality that oxygen in the steel can effectively improve molten steel cleanness and steel with this technology.
Claims (3)
1, a kind of hydrogen is used for the technology of steel liquid deoxidation, it is characterized in that: when the Converter Oxigen Blowing decarburization finishes or during ladle refining or RH when producing the ultra low-carbon steel oxygen decarburization and finishing, H
2Or Ar-H
2Mixed gas be blown into and carry out deoxidation, H in the molten steel
2Or Ar-H
2Mixed gas flow be 40～3000m
3/ h, pressure are 0.5～2.0MPa, and the time that mixed gas is blown into molten steel is 5～30min; Blow the hydrogen deoxidation when finishing at converter or ladle or RH, remove the hydrogen that is dissolved in the steel by Argon and vacuum-treat.
2, according to claim 1 hydrogen is used for the technology of steel liquid deoxidation, it is characterized in that described being blown into carry out deoxidation and be in the molten steel: be blown at the RH upcast from ladle bottom or by gas permeable brick from the top and bottom combined blown converter bottom or by gas permeable brick by gas permeable brick and carry out deoxidation the molten steel.
3, according to claim 1 and 2 hydrogen is used for the technology of steel liquid deoxidation, it is characterized in that described Ar-H
2Mixed gas in, the volume content of Ar is 10～80%, H
2Volume content be 20～90%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100630984A CN101603115A (en) | 2009-07-09 | 2009-07-09 | A kind of technology that hydrogen is used for steel liquid deoxidation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100630984A CN101603115A (en) | 2009-07-09 | 2009-07-09 | A kind of technology that hydrogen is used for steel liquid deoxidation |
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| Publication Number | Publication Date |
|---|---|
| CN101603115A true CN101603115A (en) | 2009-12-16 |
Family
ID=41469015
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|---|---|---|---|
| CNA2009100630984A Pending CN101603115A (en) | 2009-07-09 | 2009-07-09 | A kind of technology that hydrogen is used for steel liquid deoxidation |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388053A (en) * | 2013-06-25 | 2013-11-13 | 萍乡萍钢安源钢铁有限公司 | Technology for blowing refining steel liquid containing a hydrogen-containing gas mixture under atmospheric condition |
| CN105779699A (en) * | 2016-03-28 | 2016-07-20 | 上海大学 | Method for removing metallic inclusions through dissolved gas float process and pressurizing vacuum induction furnace refining device |
| CN106086315A (en) * | 2016-08-16 | 2016-11-09 | 北京科技大学 | A kind of method generating micro-bubble in molten steel |
| CN106282489A (en) * | 2015-05-28 | 2017-01-04 | 鞍钢股份有限公司 | A kind of double refining method improving Cleanliness of Molten Steel |
| CN109628705A (en) * | 2019-02-26 | 2019-04-16 | 太原科技大学 | A kind of RH method of refining of low carbon stainless steel |
| CN110592325A (en) * | 2019-10-30 | 2019-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | RH deep decarburization method of molten steel |
| CN113337669A (en) * | 2021-05-18 | 2021-09-03 | 北京科技大学 | Method for strengthening electric furnace smelting by bottom blowing hydrogen |
| CN113355477A (en) * | 2021-05-18 | 2021-09-07 | 北京科技大学 | Method for realizing high scrap ratio smelting of converter by bottom blowing hydrogen |
| CN113621759A (en) * | 2021-07-28 | 2021-11-09 | 北京科技大学 | Method for improving RH refining effect by adopting hydrogen |
| CN113981306A (en) * | 2021-11-08 | 2022-01-28 | 北京科技大学 | Production method of high-cleanliness bearing steel |
| CN114058785A (en) * | 2021-10-15 | 2022-02-18 | 首钢集团有限公司 | Molten steel hydrogen blowing deoxidation process |
| EP4026919A1 (en) * | 2021-01-07 | 2022-07-13 | Primetals Technologies Germany GmbH | Method and device for steel production |
-
2009
- 2009-07-09 CN CNA2009100630984A patent/CN101603115A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388053A (en) * | 2013-06-25 | 2013-11-13 | 萍乡萍钢安源钢铁有限公司 | Technology for blowing refining steel liquid containing a hydrogen-containing gas mixture under atmospheric condition |
| CN106282489A (en) * | 2015-05-28 | 2017-01-04 | 鞍钢股份有限公司 | A kind of double refining method improving Cleanliness of Molten Steel |
| CN105779699A (en) * | 2016-03-28 | 2016-07-20 | 上海大学 | Method for removing metallic inclusions through dissolved gas float process and pressurizing vacuum induction furnace refining device |
| CN106086315A (en) * | 2016-08-16 | 2016-11-09 | 北京科技大学 | A kind of method generating micro-bubble in molten steel |
| CN106086315B (en) * | 2016-08-16 | 2018-04-24 | 北京科技大学 | A kind of method that micro-bubble is generated in molten steel |
| CN109628705A (en) * | 2019-02-26 | 2019-04-16 | 太原科技大学 | A kind of RH method of refining of low carbon stainless steel |
| CN110592325A (en) * | 2019-10-30 | 2019-12-20 | 攀钢集团攀枝花钢铁研究院有限公司 | RH deep decarburization method of molten steel |
| CN110592325B (en) * | 2019-10-30 | 2021-06-22 | 攀钢集团攀枝花钢铁研究院有限公司 | RH deep decarburization method of molten steel |
| EP4026919A1 (en) * | 2021-01-07 | 2022-07-13 | Primetals Technologies Germany GmbH | Method and device for steel production |
| CN113337669A (en) * | 2021-05-18 | 2021-09-03 | 北京科技大学 | Method for strengthening electric furnace smelting by bottom blowing hydrogen |
| CN113355477A (en) * | 2021-05-18 | 2021-09-07 | 北京科技大学 | Method for realizing high scrap ratio smelting of converter by bottom blowing hydrogen |
| CN113337669B (en) * | 2021-05-18 | 2022-05-03 | 北京科技大学 | Method for strengthening electric furnace smelting by bottom blowing hydrogen |
| CN113621759A (en) * | 2021-07-28 | 2021-11-09 | 北京科技大学 | Method for improving RH refining effect by adopting hydrogen |
| CN114058785A (en) * | 2021-10-15 | 2022-02-18 | 首钢集团有限公司 | Molten steel hydrogen blowing deoxidation process |
| CN113981306A (en) * | 2021-11-08 | 2022-01-28 | 北京科技大学 | Production method of high-cleanliness bearing steel |
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Open date: 20091216 |