BR0212732A - Método de refino e aparelho de refino para aços ao cromo fundidos - Google Patents

Método de refino e aparelho de refino para aços ao cromo fundidos

Info

Publication number
BR0212732A
BR0212732A BR0212732-6A BR0212732A BR0212732A BR 0212732 A BR0212732 A BR 0212732A BR 0212732 A BR0212732 A BR 0212732A BR 0212732 A BR0212732 A BR 0212732A
Authority
BR
Brazil
Prior art keywords
refining
torr
kpa
vessel
steel
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.)
Granted
Application number
BR0212732-6A
Other languages
English (en)
Other versions
BR0212732B1 (pt
Inventor
Kosuke Yamashita
Ryuji Nakao
Tomoaki Tanaka
Masao Igarashi
Koichiro Yoshino
Makoto Sumi
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.)
Nittetsu Plant Designing Corp
Nippon Steel Corp
Original Assignee
Nittetsu Plant Designing Corp
Nippon Steel Corp
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
Priority claimed from JP2001286694A external-priority patent/JP4895446B2/ja
Priority claimed from JP2001286695A external-priority patent/JP2003096515A/ja
Priority claimed from JP2001339046A external-priority patent/JP4262428B2/ja
Priority claimed from JP2001391274A external-priority patent/JP3922923B2/ja
Priority claimed from JP2002235726A external-priority patent/JP3973512B2/ja
Application filed by Nittetsu Plant Designing Corp, Nippon Steel Corp filed Critical Nittetsu Plant Designing Corp
Priority to BRPI0216050A priority Critical patent/BRPI0216050B1/pt
Publication of BR0212732A publication Critical patent/BR0212732A/pt
Publication of BR0212732B1 publication Critical patent/BR0212732B1/pt

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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • 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
    • 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
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising
    • C21C7/0685—Decarburising of stainless steel
    • 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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/0025—Charging or loading melting furnaces with material in the solid state
    • F27D3/0032—Charging or loading melting furnaces with material in the solid state using an air-lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/162—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel
    • F27D2003/163—Introducing a fluid jet or current into the charge the fluid being an oxidant or a fuel the fluid being an oxidant
    • F27D2003/164—Oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/166—Introducing a fluid jet or current into the charge the fluid being a treatment gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/168—Introducing a fluid jet or current into the charge through a lance

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

"MéTODO DE REFINO E APARELHO DE REFINO PARA AçOS AO CROMO FUNDIDOS". A presente invenção refere-se a um método de refino e um aparelho de refino, capazes de encurtar o tempo necessário para o refino e a redução dos custos de refino no refino por descarburação de um aço ao cromo fundido, cujo método de refino para aço ao cromo fundido, etc., executa o refino por descarburação soprando-se um gás contendo gás oxigênio em um aço ao cromo fundido sob vácuo ou sob pressão atmosférica e vácuo, o referido método de refino para um aço ao cromo fundido, etc., sendo caracterizado por ter uma primeira etapa para soprar gás oxigênio enquanto faz com que o interior do vaso esteja a uma pressão em uma faixa de 53 kPa (400 Torr) até a pressão atmosférica, uma segunda etapa de sopro de gás oxigênio enquanto se evacua o interior do vaso para 33 a 53 kPa (250 a 400 Torr), e uma terceira etapa para soprar-se gás enquanto se evacua o interior do vaso para não mais que 33 kPa (250 Torr). Além disso, um método de refino e um aparelho de refino para um aço ao cromo fundido de carbono ultrabaixo caracterizado pela execução de um primeiro refino a vácuo até a terceira etapa, e então restaurando-se a pressão no vaso para pelo menos 53 kPa (400 Torr), e então executando-se o segundo refino a vácuo enquanto se faz com que a taxa de sopro de fundo do gás seja pelo menos 0,4 Nm^ 3^/Min por tonelada de aço.
BRPI0212732-6B1A 2001-09-20 2002-09-20 método de refino de etapas múltiplas pelo sopro de gás para o refino de um aço ao cromo fundido em um vaso de refino BR0212732B1 (pt)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BRPI0216050A BRPI0216050B1 (pt) 2001-09-20 2002-09-20 aparelho de refino para aços ao cromo fundidos

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2001286694A JP4895446B2 (ja) 2001-09-20 2001-09-20 含クロム溶鋼の精錬方法
JP2001286695A JP2003096515A (ja) 2001-09-20 2001-09-20 極低炭含クロム溶鋼の精錬方法
JP2001339046A JP4262428B2 (ja) 2001-11-05 2001-11-05 冶金炉における水漏れ検知方法
JP2001391274A JP3922923B2 (ja) 2001-12-25 2001-12-25 真空排気設備における真空度制御方法及び装置
JP2002235726A JP3973512B2 (ja) 2002-08-13 2002-08-13 真空排気装置の戻水貯水槽内ガスの換気方法及び戻水貯水槽の水封蓋
PCT/JP2002/009701 WO2003027335A1 (fr) 2001-09-20 2002-09-20 Procede d'affinage de fer en fusion contenant du chrome

Publications (2)

Publication Number Publication Date
BR0212732A true BR0212732A (pt) 2004-10-05
BR0212732B1 BR0212732B1 (pt) 2013-07-02

Family

ID=27532002

Family Applications (2)

Application Number Title Priority Date Filing Date
BRPI0212732-6B1A BR0212732B1 (pt) 2001-09-20 2002-09-20 método de refino de etapas múltiplas pelo sopro de gás para o refino de um aço ao cromo fundido em um vaso de refino
BRPI0216050A BRPI0216050B1 (pt) 2001-09-20 2002-09-20 aparelho de refino para aços ao cromo fundidos

Family Applications After (1)

Application Number Title Priority Date Filing Date
BRPI0216050A BRPI0216050B1 (pt) 2001-09-20 2002-09-20 aparelho de refino para aços ao cromo fundidos

Country Status (8)

Country Link
US (2) US20040245682A1 (pt)
EP (1) EP1431404B1 (pt)
KR (1) KR100662895B1 (pt)
CN (1) CN1556865A (pt)
BR (2) BR0212732B1 (pt)
DE (1) DE60238776D1 (pt)
TW (1) TW564262B (pt)
WO (1) WO2003027335A1 (pt)

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KR100922061B1 (ko) * 2007-12-12 2009-10-16 주식회사 포스코 극저탄소 페라이트계 스테인리스강 제조방법
CN102296155B (zh) * 2011-01-10 2013-03-27 沈阳铸造研究所 一种aod阀架配气***
CN102706146B (zh) * 2012-06-18 2015-06-03 中国恩菲工程技术有限公司 一种底吹熔炼设备
DE102013014856A1 (de) * 2013-04-15 2014-10-16 Sms Siemag Ag Verfahren und Anlage zur Herstellung von Ferrolegierungen mit niedrigem Kohlenstoffgehalt in einem Vakuum-Konverter
DE102014201827A1 (de) * 2013-11-27 2015-05-28 Sms Siemag Ag Verfahren zur Steuerung des Entkohlungsreaktionspotentials einer kohlenstoffhaltigen Metallschmelze während einer Sauerstoff-Inertgas-Blas- und Vakuumbehandlung
KR101634735B1 (ko) * 2015-07-29 2016-06-29 주식회사 포스코 진공 탈가스 설비 및 이를 이용한 용강 정련 방법
CN105256105B (zh) * 2015-11-17 2017-05-17 莱芜钢铁集团有限公司 一种rh真空精炼防爆装置及其控制方法
US9845210B2 (en) * 2016-01-06 2017-12-19 Oren Technologies, Llc Conveyor with integrated dust collector system
DE102020200571A1 (de) 2020-01-20 2021-07-22 Sms Group Gmbh Vorrichtung und Verfahren zum Betreiben der Vorrichtung
CN111485115B (zh) * 2020-06-03 2021-12-07 云南钛业股份有限公司 一种通过调节电子束冷床炉真空度控制Al元素挥发的方法
WO2022130473A1 (ja) * 2020-12-14 2022-06-23 日鉄ステンレス株式会社 含クロム溶鋼の精錬方法
CN112514826B (zh) * 2020-12-16 2023-07-21 真木农业设备（安徽）有限公司 一种鸡舍饮水和自动喷淋装置
EP4056720A1 (de) 2021-03-08 2022-09-14 SMS Group GmbH Verfahren zum herstellen einer ferrolegierung mit niedrigem kohlenstoffgehalt
DE102021214220A1 (de) 2021-03-08 2022-09-08 Sms Group Gmbh Verfahren zum Herstellen einer Ferrolegierung mit niedrigem Kohlenstoffgehalt
EP4056721A1 (de) 2021-03-08 2022-09-14 SMS Group GmbH Verfahren zum herstellen einer ferrolegierung mit niedrigem kohlenstoffgehalt
DE102021214218A1 (de) 2021-03-08 2022-09-08 Sms Group Gmbh Verfahren zum Herstellen einer Ferrolegierung mit niedrigem Kohlenstoffgehalt
CN113106187A (zh) * 2021-03-22 2021-07-13 张家港宏昌钢板有限公司 一种改善if钢水口堵塞的精炼双联生产方法
CN113430336B (zh) * 2021-06-18 2022-11-18 首钢集团有限公司 一种利用co2进行rh高效精炼的操作方法
DE102022001718A1 (de) 2022-05-16 2023-11-16 CTH Conrads Technologie und Holding AG Verfahren und Vorrichtung zur Detektion einer Wasserleckage in einem metallurgischen Schmelzofen

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JPH101716A (ja) * 1996-06-13 1998-01-06 Daido Steel Co Ltd 減圧精錬炉の減圧装置

Also Published As

Publication number Publication date
US20070152386A1 (en) 2007-07-05
TW564262B (en) 2003-12-01
KR100662895B1 (ko) 2007-01-02
KR20040029487A (ko) 2004-04-06
WO2003027335A1 (fr) 2003-04-03
CN1556865A (zh) 2004-12-22
BRPI0216050B1 (pt) 2015-12-29
EP1431404A1 (en) 2004-06-23
US20040245682A1 (en) 2004-12-09
DE60238776D1 (de) 2011-02-10
BR0212732B1 (pt) 2013-07-02
EP1431404B1 (en) 2010-12-29
US7497987B2 (en) 2009-03-03
EP1431404A4 (en) 2008-06-25

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B25G Requested change of headquarter approved

Owner name: NIPPON STEEL CORPORATION (JP) , NITTETSU PLANT DES

B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 02/07/2013, OBSERVADAS AS CONDICOES LEGAIS.

B25D Requested change of name of applicant approved
B25D Requested change of name of applicant approved