PL422666A1 - Method for decarburization of steel - Google Patents
Method for decarburization of steelInfo
- Publication number
- PL422666A1 PL422666A1 PL422666A PL42266617A PL422666A1 PL 422666 A1 PL422666 A1 PL 422666A1 PL 422666 A PL422666 A PL 422666A PL 42266617 A PL42266617 A PL 42266617A PL 422666 A1 PL422666 A1 PL 422666A1
- Authority
- PL
- Poland
- Prior art keywords
- inert gas
- oxygen
- flow rate
- maximum
- stage
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 6
- 229910000831 Steel Inorganic materials 0.000 title abstract 3
- 239000010959 steel Substances 0.000 title abstract 3
- 238000005261 decarburization Methods 0.000 title 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 11
- 239000011261 inert gas Substances 0.000 abstract 11
- 229910052760 oxygen Inorganic materials 0.000 abstract 11
- 239000001301 oxygen Substances 0.000 abstract 11
- 239000007788 liquid Substances 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 238000007664 blowing Methods 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000009851 ferrous metallurgy Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
Abstract
Sposób odwęglania ciekłej stali mający zastosowanie w metalurgii żelaza do zmniejszenia zawartości węgla w ciekłej stali, w szczególności po spuście z pieca indukcyjnego prowadzi się w kadzi przy ciśnieniu atmosferycznym, przy czym tlen gazowy miesza z gazem obojętnym wprowadzając mieszaninę gazową z góry do kąpieli metalowej za pomocą zanurzanej lancy, gdzie w pierwszym etapie procesu natężenie przepływu tlenu wynosi 80 - 100% wartości maksymalnej dla tlenu, a natężenie przepływu gazu obojętnego stanowi od 40 - 50% przepływu maksymalnego dla gazu obojętnego, w drugim etapie procesu zmniejsza się natężenie przepływu tlenu do 60% wartości maksymalnej dla tlenu i zwiększa natężenie przepływu gazu obojętnego do 50 - 75% wartości maksymalnej dla gazu obojętnego, w trzecim etapie procesu zmniejsza się natężenie przepływu tlenu do 40% wartości maksymalnej dla tlenu przy równoczesnym zwiększeniu natężenia przepływu gazu obojętnego do wartości maksymalnej dla gazu obojętnego, w czwartym etapie procesu zmniejsza się natężenie przepływu tlenu do 20% wartości maksymalnej dla tlenu przy równoczesnym utrzymaniu natężenia przepływu gazu obojętnego przy wartości maksymalnej dla gazu obojętnego, w końcowym piątym etapie rurą środkową lancy wdmuchuje się tlen przy natężeniu przepływu stanowiącym 10% wartości maksymalnej dla tlenu przy równoczesnym wdmuchiwaniu gazu obojętnego rurą zewnętrzną lancy przy natężeniu przepływu 50 - 100% wartości maksymalnej dla gazu obojętnego.A method of decarburizing liquid steel used in ferrous metallurgy to reduce the carbon content in liquid steel, in particular after tapping from an induction furnace, is carried out in a ladle at atmospheric pressure, with gaseous oxygen mixed with an inert gas, introducing the gas mixture from above into the metal bath using immersed lance, where in the first stage of the process the oxygen flow rate is 80 - 100% of the maximum value for oxygen, and the inert gas flow rate is 40 - 50% of the maximum flow for inert gas, in the second stage of the process the oxygen flow rate is reduced to 60% maximum value for oxygen and increases the inert gas flow rate to 50 - 75% of the maximum inert gas value, in the third stage of the process, the oxygen flow rate is reduced to 40% of the maximum oxygen value while increasing the inert gas flow rate to the maximum inert gas value , in the fourth stage of the process, the oxygen flow rate is reduced to 20% of the maximum value for oxygen while maintaining the inert gas flow rate at the maximum value for inert gas, in the final fifth stage, oxygen is blown through the middle pipe of the lance at a flow rate of 10% of the maximum value for oxygen while simultaneously blowing inert gas through the outer tube of the lance at a flow rate of 50 - 100% of the maximum value for inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL422666A PL235191B1 (en) | 2017-08-28 | 2017-08-28 | Method for decarburization of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL422666A PL235191B1 (en) | 2017-08-28 | 2017-08-28 | Method for decarburization of steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL422666A1 true PL422666A1 (en) | 2019-03-11 |
| PL235191B1 PL235191B1 (en) | 2020-06-01 |
Family
ID=65629552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL422666A PL235191B1 (en) | 2017-08-28 | 2017-08-28 | Method for decarburization of steel |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL235191B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02209414A (en) * | 1989-02-07 | 1990-08-20 | Nippon Steel Corp | Method for producing dead soft steel under atmosphere |
| PL327160A1 (en) * | 1997-07-02 | 1999-01-04 | Schloemann Siemag Ag | Method of and smelting tank for obtaining steel of high cr content and/or ferroalloys |
| KR20000038788A (en) * | 1998-12-09 | 2000-07-05 | 이구택 | Method of decarburizing low carbon stainless steel |
| CN202626234U (en) * | 2012-03-31 | 2012-12-26 | 河北钢铁集团有限公司 | Refining device for smelting low-carbon steel and ultra-low carbon steel by utilizing Ar/O2 plasma |
| CN103014239A (en) * | 2012-12-27 | 2013-04-03 | 邢台钢铁有限责任公司 | Production method of ER308L steel grade in 300 series stainless steel |
| KR20140033767A (en) * | 2012-09-10 | 2014-03-19 | 주식회사 포스코 | High speed decarburization method for high purity stainless steel |
-
2017
- 2017-08-28 PL PL422666A patent/PL235191B1/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02209414A (en) * | 1989-02-07 | 1990-08-20 | Nippon Steel Corp | Method for producing dead soft steel under atmosphere |
| PL327160A1 (en) * | 1997-07-02 | 1999-01-04 | Schloemann Siemag Ag | Method of and smelting tank for obtaining steel of high cr content and/or ferroalloys |
| KR20000038788A (en) * | 1998-12-09 | 2000-07-05 | 이구택 | Method of decarburizing low carbon stainless steel |
| CN202626234U (en) * | 2012-03-31 | 2012-12-26 | 河北钢铁集团有限公司 | Refining device for smelting low-carbon steel and ultra-low carbon steel by utilizing Ar/O2 plasma |
| KR20140033767A (en) * | 2012-09-10 | 2014-03-19 | 주식회사 포스코 | High speed decarburization method for high purity stainless steel |
| CN103014239A (en) * | 2012-12-27 | 2013-04-03 | 邢台钢铁有限责任公司 | Production method of ER308L steel grade in 300 series stainless steel |
Also Published As
| Publication number | Publication date |
|---|---|
| PL235191B1 (en) | 2020-06-01 |
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