ES472730A1 - Procedimiento para la fabricacion de aceros inoxidables - Google Patents

Procedimiento para la fabricacion de aceros inoxidables

Info

Publication number
ES472730A1
ES472730A1 ES78472730A ES472730A ES472730A1 ES 472730 A1 ES472730 A1 ES 472730A1 ES 78472730 A ES78472730 A ES 78472730A ES 472730 A ES472730 A ES 472730A ES 472730 A1 ES472730 A1 ES 472730A1
Authority
ES
Spain
Prior art keywords
nozzle
refining phase
blast
inert gas
refining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES78472730A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fried Krupp Huettenwerke AG
Original Assignee
Fried Krupp Huettenwerke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fried Krupp Huettenwerke AG filed Critical Fried Krupp Huettenwerke AG
Publication of ES472730A1 publication Critical patent/ES472730A1/es
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/005—Manufacture of stainless steel

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Procedimiento para la fabricación de aceros inoxidables con contenidos de carbono muy pequeños a partir de una masa fundida de acero que contiene Cr o Cr-Ni con contenidos elevados de carbono en un convertidor, que presenta por lo menos una tobera de soplado por debajo del nivel del baño y por lo menos una lanza de soplado por encima del nivel del baño, introduciéndose en varias fases de afino de la masa fundida de acero en la primera fase de afino oxígeno a través de la lanza de soplado y gas inerte a través de la tobera de soplado y en fases de afino de la masa fundida de acero que siguen a aquélla a través de las toberas de soplado oxígeno en combinación con gas inerte, reduciéndose con el contenido de carbono en disminución en la masa fundida de acero la porción de oxígeno introducida en proporción con la porción de gas inerte, que se caracteriza por el hecho de que se emplean toberas de soplado que varían en la sección transversal, en las que se extiende una varilla desplazable axialmente desde el extremo de la tobera, desplazándose hacia delante la varilla en la primera fase de afino, con la disminución mayor posible de la sección transversal de la tobera, con su extremo libre hasta la boca de la tobera y la varilla se extrae en las fases de afino siguientes para obtener el mayor aumento posible de la sección transversal de la tobera.
ES78472730A 1977-08-22 1978-08-21 Procedimiento para la fabricacion de aceros inoxidables Expired ES472730A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2737832A DE2737832C3 (de) 1977-08-22 1977-08-22 Verwendung von im Querschnitt veränderlichen Blasdüsen zur Herstellung von rostfreien Stählen

Publications (1)

Publication Number Publication Date
ES472730A1 true ES472730A1 (es) 1979-02-16

Family

ID=6017019

Family Applications (1)

Application Number Title Priority Date Filing Date
ES78472730A Expired ES472730A1 (es) 1977-08-22 1978-08-21 Procedimiento para la fabricacion de aceros inoxidables

Country Status (10)

Country Link
US (1) US4178173A (es)
JP (1) JPS5443113A (es)
AR (1) AR216170A1 (es)
AT (1) AT370774B (es)
DE (1) DE2737832C3 (es)
ES (1) ES472730A1 (es)
FR (1) FR2401225A1 (es)
GB (1) GB2002818B (es)
IT (1) IT1098098B (es)
SE (1) SE443154B (es)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4334921A (en) * 1979-04-16 1982-06-15 Nippon Steel Corporation Converter steelmaking process
US4280838A (en) * 1979-05-24 1981-07-28 Sumitomo Metal Industries, Ltd. Production of carbon steel and low-alloy steel with bottom blowing basic oxygen furnace
JPS6013402B2 (ja) * 1979-05-24 1985-04-06 住友金属工業株式会社 ガス循環システムを有する鋼の精錬装置
JPS5921367B2 (ja) * 1979-05-29 1984-05-19 大同特殊鋼株式会社 含クロム鋼の精錬方法
JPS5623215A (en) * 1979-08-02 1981-03-05 Nippon Kokan Kk <Nkk> Converter steel making method
DE2931957A1 (de) * 1979-08-07 1981-02-12 Maximilianshuette Eisenwerk Verfahren zur herstellung von stahl mit niedrigem wasserstoffgehalt in einem sauerstoffdurchblaskonverter
EP0030360B2 (de) * 1979-12-11 1988-09-28 Eisenwerk-Gesellschaft Maximilianshütte mbH Stahlerzeugungsverfahren
DD154026A5 (de) * 1979-12-28 1982-02-17 Creusot Loire Mischblasverfahren zur raffination der metalle im konverter
US4302244A (en) * 1980-07-18 1981-11-24 Pennsylvania Engineering Corporation Steel conversion method
US4358314A (en) * 1980-09-03 1982-11-09 British Steel Corporation Metal refining process
AU540689B2 (en) * 1980-12-20 1984-11-29 K.K. Kobe Seiko Sho Tuyere for blowing gas into molten metal bath container
JPS57145917A (en) * 1981-03-03 1982-09-09 Sumitomo Metal Ind Ltd Refining method for high chromium steel
AU8474782A (en) * 1981-06-19 1982-12-23 British Steel Corp. Refining of steel from pig iron
US4470582A (en) * 1982-02-15 1984-09-11 Zirconal Processes Limited Introduction of substances into molten metal
US4397685A (en) * 1982-03-26 1983-08-09 Union Carbide Corporation Production of ultra low carbon steel by the basic oxygen process
US4402739A (en) * 1982-07-13 1983-09-06 Kawasaki Steel Corporation Method of operation of a top-and-bottom blown converter
US4557758A (en) * 1982-12-16 1985-12-10 Mizin Vladimir G Steelmaking process
JPS59150009A (ja) * 1983-02-12 1984-08-28 Daido Steel Co Ltd 鋼の精錬方法
US4472195A (en) * 1983-08-15 1984-09-18 Olin Corporation Process for decarburizing alloy melts
JPS6050108A (ja) * 1983-08-29 1985-03-19 Nippon Steel Corp 複合精錬炉による極低炭素鋼溶製法
US4462825A (en) * 1983-09-01 1984-07-31 United States Steel Corporation Method for increasing the scrap melting capability of metal refining processes
JPS6063307A (ja) * 1983-09-14 1985-04-11 Kawasaki Steel Corp 極低炭素鋼の転炉製鋼法
US4783219A (en) * 1985-11-13 1988-11-08 Nippon Kokan Kabushiki Kaisha Method for melting and reducing chrome ore
JPS62167811A (ja) * 1986-01-20 1987-07-24 Nippon Kokan Kk <Nkk> 溶融還元製鋼法
US4711430A (en) * 1986-04-01 1987-12-08 Union Carbide Corporation Side-injected metal refining vessel and method
US4708738A (en) * 1986-04-01 1987-11-24 Union Carbide Corporation Method for refining very small heats of molten metal
US4647019A (en) * 1986-04-01 1987-03-03 Union Carbide Corporation Very small refining vessel
US4944799A (en) * 1987-09-10 1990-07-31 Nkk Corporation Method of producing stainless molten steel by smelting reduction
JPH01215912A (ja) * 1988-02-24 1989-08-29 Kawasaki Steel Corp 含クロム溶鉄の製造方法
US5328658A (en) * 1993-08-04 1994-07-12 Daido Tokushuko Kabushiki Kaisha Method of refining chromium-containing steel
CN112212700B (zh) * 2020-09-03 2021-09-14 钢铁研究总院 一种环缝式供气元件和供气方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE610265A (es) * 1960-11-18
GB1253581A (en) * 1968-02-24 1971-11-17 Maximilianshuette Eisenwerk Improvements in processes and apparatus for making steel
US4001009A (en) * 1969-04-03 1977-01-04 Hannsgeorg Bauer Process for the manufacture of steels with a high chromium content
US3728101A (en) * 1970-11-09 1973-04-17 Armco Steel Corp Process for making stainless steel
AT337736B (de) * 1973-02-12 1977-07-11 Voest Ag Verfahren zum frischen von roheisen
US3854932A (en) * 1973-06-18 1974-12-17 Allegheny Ludlum Ind Inc Process for production of stainless steel
IT1036194B (it) * 1974-06-07 1979-10-30 British Steel Corp Procedimento e dispositivo a lancia di ossigeno per la produzione dell acciaio

Also Published As

Publication number Publication date
FR2401225B1 (es) 1982-12-03
DE2737832B2 (de) 1979-09-13
AT370774B (de) 1983-05-10
IT7826928A0 (it) 1978-08-22
GB2002818B (en) 1982-03-03
FR2401225A1 (fr) 1979-03-23
SE7808526L (sv) 1979-02-23
ATA606178A (de) 1982-09-15
JPS568084B2 (es) 1981-02-21
US4178173A (en) 1979-12-11
AR216170A1 (es) 1979-11-30
DE2737832A1 (de) 1979-03-01
SE443154B (sv) 1986-02-17
IT1098098B (it) 1985-08-31
GB2002818A (en) 1979-02-28
JPS5443113A (en) 1979-04-05
DE2737832C3 (de) 1980-05-22

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19991007