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FR2088927A6 - Controlled atmospheres for metallurgical - furnaces - Google Patents

Controlled atmospheres for metallurgical - furnaces

Info

Publication number
FR2088927A6
FR2088927A6 FR7015777A FR7015777A FR2088927A6 FR 2088927 A6 FR2088927 A6 FR 2088927A6 FR 7015777 A FR7015777 A FR 7015777A FR 7015777 A FR7015777 A FR 7015777A FR 2088927 A6 FR2088927 A6 FR 2088927A6
Authority
FR
France
Prior art keywords
combustion
metallurgical
furnaces
controlled atmospheres
air factor
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
FR7015777A
Other languages
French (fr)
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.)
Engie SA
Original Assignee
Gaz de France 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 Gaz de France SA filed Critical Gaz de France SA
Priority to FR7015777A priority Critical patent/FR2088927A6/en
Priority to GB2187370A priority patent/GB1312063A/en
Priority to BE750054D priority patent/BE750054A/en
Priority to DE19702022253 priority patent/DE2022253A1/en
Application granted granted Critical
Publication of FR2088927A6 publication Critical patent/FR2088927A6/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)

Abstract

Controlled atmospheres for metallurgical furnaces To increase to CO/CO2 ratios in the atmosphere formed, at least certain fractions of the combustible gaseous mixture are preheated prior to combustion. To avoid the formation of methane during combustion, the combustion and preheating conditions and the air factor are selected to achieve a combustion chamber inner wall temp. higher than a critical temp. of approx. 1200 degrees C. Simultaneously, raising the air factor is avoided until traces of unreacted oxygen appear.
FR7015777A 1969-05-06 1970-04-29 Controlled atmospheres for metallurgical - furnaces Expired FR2088927A6 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7015777A FR2088927A6 (en) 1970-04-29 1970-04-29 Controlled atmospheres for metallurgical - furnaces
GB2187370A GB1312063A (en) 1969-05-06 1970-05-06 Generation of controlled atmospheres in particular for metallurgical furnaces
BE750054D BE750054A (en) 1969-05-06 1970-05-06 PRODUCTION OF CONTROLLED ATMOSPHERES IN PARTICULAR FOR METALLURGIC OVENS
DE19702022253 DE2022253A1 (en) 1969-05-06 1970-05-06 Method and device for generating protective atmosphere, in particular for furnace ovens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7015777A FR2088927A6 (en) 1970-04-29 1970-04-29 Controlled atmospheres for metallurgical - furnaces

Publications (1)

Publication Number Publication Date
FR2088927A6 true FR2088927A6 (en) 1972-01-07

Family

ID=9054866

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7015777A Expired FR2088927A6 (en) 1969-05-06 1970-04-29 Controlled atmospheres for metallurgical - furnaces

Country Status (1)

Country Link
FR (1) FR2088927A6 (en)

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Legal Events

Date Code Title Description
CL Concession to grant licenses
CL Concession to grant licenses
RL Notice of termination of a license