FR2259912A1 - Stainless steels mfr with very low carbon content - nitrogen, steam and fuel-oil blown through triple concentric jets - Google Patents

Stainless steels mfr with very low carbon content - nitrogen, steam and fuel-oil blown through triple concentric jets

Info

Publication number
FR2259912A1
FR2259912A1 FR7403188A FR7403188A FR2259912A1 FR 2259912 A1 FR2259912 A1 FR 2259912A1 FR 7403188 A FR7403188 A FR 7403188A FR 7403188 A FR7403188 A FR 7403188A FR 2259912 A1 FR2259912 A1 FR 2259912A1
Authority
FR
France
Prior art keywords
steam
carbon content
nitrogen
low carbon
mfr
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
FR7403188A
Other languages
French (fr)
Other versions
FR2259912B1 (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.)
Creusot Loire SA
Original Assignee
Creusot Loire SA
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 Creusot Loire SA filed Critical Creusot Loire SA
Priority to FR7403188A priority Critical patent/FR2259912A1/en
Priority to DE19742460291 priority patent/DE2460291A1/en
Priority to ES433754A priority patent/ES433754A1/en
Priority to GB183275A priority patent/GB1428102A/en
Priority to IT67102/75A priority patent/IT1027311B/en
Priority to IN130/CAL/75A priority patent/IN143768B/en
Priority to DD183896A priority patent/DD116262A5/xx
Priority to SE7500939A priority patent/SE7500939L/xx
Priority to AU77702/75A priority patent/AU487304B2/en
Priority to CA219,052A priority patent/CA1029558A/en
Priority to JP1325675A priority patent/JPS5512163B2/ja
Priority to BE152934A priority patent/BE825046A/en
Publication of FR2259912A1 publication Critical patent/FR2259912A1/en
Application granted granted Critical
Publication of FR2259912B1 publication Critical patent/FR2259912B1/fr
Granted 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
    • C21C5/005—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)

Abstract

A bath of chromium steel is refined using tuyeres located below the level of the bath, each tuyere consisting of three concentric tubes, the object being to obtain a very low carbon content without excessive loss of Cr to the slag; the novelty is that steam and a non-oxidising gas are blown simultaneously through the two inner tubes of the tuyeres while a fluid protecting the refractories is blown through the outer annulus, the amt. of steam and the non-oxidising gas being controlled so the carbon content is lowered without excessive loss of Cr and with simultaneous regulation of the bath temp. The non-oxidising gas may be H2, N2, Ar or He; when N2 is used, the flow is pref. sufficient to obtain a chromium steel contg. 0.1-0.25% nitrogen.
FR7403188A 1974-01-31 1974-01-31 Stainless steels mfr with very low carbon content - nitrogen, steam and fuel-oil blown through triple concentric jets Granted FR2259912A1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
FR7403188A FR2259912A1 (en) 1974-01-31 1974-01-31 Stainless steels mfr with very low carbon content - nitrogen, steam and fuel-oil blown through triple concentric jets
DE19742460291 DE2460291A1 (en) 1974-01-31 1974-12-19 BLOWING METHOD TO ACHIEVE VERY LOW CARBON CONTENT IN CHROME STEELS
ES433754A ES433754A1 (en) 1974-01-31 1975-01-13 Method of refining a chromium-containing steel
GB183275A GB1428102A (en) 1974-01-31 1975-01-15 Method of refining a chromium-containing steel
IT67102/75A IT1027311B (en) 1974-01-31 1975-01-17 BLOWING METHOD TO OBTAIN VERY LOW CARBON CONTENTS IN CHROME STEELS
IN130/CAL/75A IN143768B (en) 1974-01-31 1975-01-22
DD183896A DD116262A5 (en) 1974-01-31 1975-01-29
SE7500939A SE7500939L (en) 1974-01-31 1975-01-29
AU77702/75A AU487304B2 (en) 1974-01-31 1975-01-29 A method of refining chromium containing steels
CA219,052A CA1029558A (en) 1974-01-31 1975-01-30 Blowing process to manufacture chronium steels with very low carbon con ent
JP1325675A JPS5512163B2 (en) 1974-01-31 1975-01-31
BE152934A BE825046A (en) 1974-01-31 1975-01-31 BLOWING METHOD WITH A VIEW TO OBTAINING VERY LOW CARBON CONTENTS IN CHROME STEELS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7403188A FR2259912A1 (en) 1974-01-31 1974-01-31 Stainless steels mfr with very low carbon content - nitrogen, steam and fuel-oil blown through triple concentric jets

Publications (2)

Publication Number Publication Date
FR2259912A1 true FR2259912A1 (en) 1975-08-29
FR2259912B1 FR2259912B1 (en) 1978-10-27

Family

ID=9134265

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7403188A Granted FR2259912A1 (en) 1974-01-31 1974-01-31 Stainless steels mfr with very low carbon content - nitrogen, steam and fuel-oil blown through triple concentric jets

Country Status (3)

Country Link
BE (1) BE825046A (en)
FR (1) FR2259912A1 (en)
SE (1) SE7500939L (en)

Also Published As

Publication number Publication date
SE7500939L (en) 1975-08-01
FR2259912B1 (en) 1978-10-27
BE825046A (en) 1975-07-31

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