SU582297A1 - Method of producing low-nitrogen steel - Google Patents
Method of producing low-nitrogen steelInfo
- Publication number
- SU582297A1 SU582297A1 SU7602347961A SU2347961A SU582297A1 SU 582297 A1 SU582297 A1 SU 582297A1 SU 7602347961 A SU7602347961 A SU 7602347961A SU 2347961 A SU2347961 A SU 2347961A SU 582297 A1 SU582297 A1 SU 582297A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- metal
- nitrogen
- steel
- low
- producing low
- Prior art date
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title description 16
- 229910052757 nitrogen Inorganic materials 0.000 title description 9
- 229910000831 Steel Inorganic materials 0.000 title description 7
- 238000000034 method Methods 0.000 title description 7
- 239000010959 steel Substances 0.000 title description 7
- 239000002184 metal Substances 0.000 description 11
- 238000003723 Smelting Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005261 decarburization Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000007787 solid Substances 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
(54) СПОСОБ ПРОИЗВОДСТВА НИЗКОАЗОТИСТОЙ СТАЛИ(54) METHOD OF MANUFACTURE OF LOW-ABLUE STEEL
Изобретение относитс к области черной металлургии, конкретнее - к производству электротехнических, низколегированных и легированных сталей с низким содержанием азота.The invention relates to the field of ferrous metallurgy, more specifically to the production of electrical, low alloyed and alloyed steels with a low nitrogen content.
Известен способ выплавки, например, в дуговой печи электротехнических сталей, включающий продувку металла кислородом, скачпвание окислительного шлака и вынуск металла 1J.There is a known method of smelting, for example, in an electric steel arc furnace, including the purging of metal with oxygen, the jumping of oxidative slag and the release of metal 1J.
Перед выпуском из дуговой печи низкоуглеродистой стали в ковш содержание азота составл ет 0,U12-0,015%. После выпуска пераскисленного металла из нечп его обрабатывают в ковше газом и ввод т легируюшие и раскислители с последующим вводом легирующих и раскислителей 2J.Before discharging low carbon steel arc furnace into the ladle, the nitrogen content is 0, U12-0.015%. After the release of the peroxidized metal from necp, it is treated in the ladle with gas and doping and deoxidizing agents are introduced, followed by doping and deoxidizing agents 2J.
Получение низких конпентраций азота в малоуглеродистой стали при использовании известных способов выплавки металла в дуговой печи невозможно.Obtaining low concentrations of nitrogen in low-carbon steel using the known methods of smelting metal in an arc furnace is impossible.
Снизить концентрацию азота за счет внепечной обработки нераскислениого металла вакуумом или газами практически не удаетс . Поэтому наиболее перспективным нанравлением получени низкоазотистого металла ири выплавке его в дуговой печи вл етс применение доиолнительных приемов, сокращающихReducing the concentration of nitrogen through the after-treatment of the non-deoxidated metal with vacuum or gases is practically not possible. Therefore, the most promising method of obtaining a low-nitrogen metal and its smelting in an arc furnace is the use of additional techniques that reduce
концентрацию азота в стали при ее производстве в печи.the concentration of nitrogen in steel in its production in the furnace.
Паиболее близким по технической сущиостп решением вл етс снособ выплавки низкоуглеродистой стали в дуговых печах, по которому при температуре металла 1590-1620°С скачивают окислительный шлак, ввод т 4- 6 кг/т шамота, и при достижении температуры 1650-1710С металл продувают кислородом , после чего его со шлаком выпускают в ковш 3.The closest technical solution is to remove low carbon steel smelting in arc furnaces, where oxidative slag is downloaded at a metal temperature of 1590–1620 ° C, 4–6 kg / ton of fireclay is introduced, and when the temperature reaches 1650–1710 ° C, the metal is blown with oxygen after which it is released into the ladle with slag 3.
Педостатком этого способа вл етс получение высокого содержани азота в металле (0,012-0,015%).The disadvantage of this method is to obtain a high content of nitrogen in the metal (0.012-0.015%).
Целью изобретени вл етс получение концентраций азота в стали менее 0,010%.The aim of the invention is to obtain nitrogen concentrations in steel less than 0.010%.
Это достигаетс тем, что при выплавке стали в дуговой печи окисление примесей кислородом ироизвод т со скоростью обезуглероживани 0,5-1,5% С/час до получени концентраций углерода в металле не менее 0,04%, частично скачивают окислительный шлак, оставл его в печи в количестве 0,8-2,5% от веса металла, и дальнейшее окисление примесей , в TOiM числе и углерода, производ т твердым окислителем, который ввод т в количестве , превышающем стехиометрическп необходимое дл снижени углерода на 0,02-0,15%.This is achieved by the fact that when steel is smelted in an arc furnace, the oxidation of impurities by oxygen and production at a decarburization rate of 0.5-1.5% C / hour to obtain carbon concentrations in the metal of at least 0.04%, partially download oxidizing slag, leaving it in the furnace in the amount of 0.8-2.5% by weight of the metal, and the further oxidation of impurities, including TOiM and carbon, is produced by a solid oxidizer, which is introduced in an amount exceeding the stoichiometric required to reduce carbon by 0.02-0 ,15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7602347961A SU582297A1 (en) | 1976-04-16 | 1976-04-16 | Method of producing low-nitrogen steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU7602347961A SU582297A1 (en) | 1976-04-16 | 1976-04-16 | Method of producing low-nitrogen steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU582297A1 true SU582297A1 (en) | 1977-11-30 |
Family
ID=20657010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU7602347961A SU582297A1 (en) | 1976-04-16 | 1976-04-16 | Method of producing low-nitrogen steel |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU582297A1 (en) |
-
1976
- 1976-04-16 SU SU7602347961A patent/SU582297A1/en active
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