SU436858A1 - The method of smelting chromium steel in the converter - Google Patents
The method of smelting chromium steel in the converterInfo
- Publication number
- SU436858A1 SU436858A1 SU1939903A SU1939903A SU436858A1 SU 436858 A1 SU436858 A1 SU 436858A1 SU 1939903 A SU1939903 A SU 1939903A SU 1939903 A SU1939903 A SU 1939903A SU 436858 A1 SU436858 A1 SU 436858A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- oxygen
- converter
- chromium
- chromium steel
- period
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 7
- 238000003723 Smelting Methods 0.000 title description 3
- 229910001220 stainless steel Inorganic materials 0.000 title description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 229910052710 silicon Inorganic materials 0.000 description 8
- 239000010703 silicon Substances 0.000 description 8
- 239000002893 slag Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 230000036284 oxygen consumption Effects 0.000 description 6
- 238000005261 decarburization Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- QRSFFHRCBYCWBS-UHFFFAOYSA-N [O].[O] Chemical compound [O].[O] QRSFFHRCBYCWBS-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- FXNGWBDIVIGISM-UHFFFAOYSA-N methylidynechromium Chemical compound [Cr]#[C] FXNGWBDIVIGISM-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010001497 Agitation Diseases 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Description
1one
Изобретение относитс к черной металлургии .This invention relates to the steel industry.
Известен снособ выплавки хромистой стали в конвертере из природно-легированного хромом чугуна, включающий наводку и продувку металла топливно-кислородной смесью с окислением креплени и обезуглероживанием металла.A chromium steel smelting strip in a converter of natural chromium-doped cast iron is known, including a tip and a purge of the metal with an oxygen-fuel mixture with oxidation of fastening and decarburization of the metal.
Однако при осуществлении такого способа содержание кислорода в дутье по ходу плавки не регулируют. Это приводит к затормаживанию нроцесса окислени кремни и, следовательно , удлин ет плавку, а также приводит к угару хрома.However, when implementing this method, the oxygen content in the blast during the melting process is not regulated. This leads to a slowdown in the process of oxidation of silicon and, therefore, lengthens melting, and also leads to chromium carbon.
Предлагаемый способ позвол ет повысить производительность и уменьшить угар хрома.The proposed method allows to increase productivity and reduce chromium frenzy.
Дл этого в период наводки шлака продувку ведут с коэффициентом расхода кислорода 0,7-1,0, Б период окислени кремни -1,1- 3,0 и в период обезуглероживани - 0,7-0,9.For this, during the period of slag buildup, purging is carried out with an oxygen consumption ratio of 0.7-1.0, B, the silicon oxidation period is -1.1-3.0, and during the decarburization period, 0.7-0.9.
Способ осуществл ют следующим образом.The method is carried out as follows.
В конвертер загружают 20-50% от необходимого количества металлолома, заливают природно-легированный хромом чугун и начинают продувку топливно-кислородной смесью с одновременной присадкой извести. В Этот период, когда производитс загрузка извести и наводитс шлак, ванну продувают с коэффициентом расхода кислорода в дутье 0,7-1,0, при этом обеспечиваетс быстрое наведение жидкоподвижного шлака.20-50% of the required amount of scrap is loaded into the converter, cast iron is doped with natural chromium and start flushing with an oxygen-oxygen mixture with a simultaneous lime additive. During this period, when lime is loaded and slag is induced, the bath is blown with an oxygen consumption ratio in the blast of 0.7-1.0, thus providing fast guidance of the liquid moving slag.
По окончании наводки шлака постепенно увеличивают избыток кислорода в -смеси путем увеличени расхода кислорода и снижени расхода топлива. Коэффициент расхода кислорода на период окислени кремни должен находитьс в пределах 1,1-3,0. При таком избытке кислорода достигаетс быстрое окисление кремни с минимальным угаром хрома. По завершению процесса окислени кремни коэффициент расхода кислорода в смеси снижают до 0,7-0,9 и ванну продувают таким образом вплоть до получени требуемого содержани углерода в стали. Фурмы в период окислени кремни и приAfter termination of the slag, the excess oxygen in the α-mixture is gradually increased by increasing the oxygen consumption and reducing the fuel consumption. The oxygen consumption factor for the period of silicon oxidation should be in the range of 1.1-3.0. With such an excess of oxygen, silicon is rapidly oxidized with minimal chromium. Upon completion of the silicon oxidation process, the oxygen consumption ratio in the mixture is reduced to 0.7-0.9, and the bath is thus purged until the desired carbon content in the steel is obtained. Tuyeres during silicon oxidation and at
обезуглероживании должны находитьс в шлаке.decarburization must be in the slag.
Предмет изобретени Subject invention
Способ выплавки хромистой стали в конвертере из природно-легированного хромом чугуна, включающий «аводку шлака, продувку металла топливно-кислородной смесью с окислением кремни и обезуглероживанием металла кислородной смесью, отличающ и и с тем, что, с целью увеличени производительности и уменьшени угара хрома, в период наводки шлака продувку ведут с коэффициентом расхода кислорода в топливнокислородной смеси 0,7-1,0, в период окислени кремни - 1,1-3,0 и в период обезуглероживани -0 ,7-0,9.The method of smelting chromium steel in a converter from natural chromium-doped pig iron, including a slag deposit, purging the metal with an oxygen-oxygen mixture with silicon oxidation and metal decarburization, with the aim of increasing productivity and reducing chromium carbon in the period of slag laying, purging is carried out with an oxygen consumption ratio in the fuel-oxygen mixture of 0.7-1.0, in the period of silicon oxidation - 1.1-3.0, and in the decarburization period of -0,7-0.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1939903A SU436858A1 (en) | 1973-07-02 | 1973-07-02 | The method of smelting chromium steel in the converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1939903A SU436858A1 (en) | 1973-07-02 | 1973-07-02 | The method of smelting chromium steel in the converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU436858A1 true SU436858A1 (en) | 1974-07-25 |
Family
ID=20558790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1939903A SU436858A1 (en) | 1973-07-02 | 1973-07-02 | The method of smelting chromium steel in the converter |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU436858A1 (en) |
-
1973
- 1973-07-02 SU SU1939903A patent/SU436858A1/en active
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