EP 0778354 B1 20010404 - Process for supplying controlled atmosphere gases into a heat treatment furnace and heat treatment plant
Title (en)
Process for supplying controlled atmosphere gases into a heat treatment furnace and heat treatment plant
Title (de)
Verfahren zur Schutzgasversorgung eines Wärmebehandlungsofens und Wärmebehandlungsanlage
Title (fr)
Procédé d'alimentation de gaz protecteur dans un four de traitement thermique et installation de traitement thermique
Publication
Application
Priority
DE 19545764 A 19951207
Abstract (en)
[origin: EP0778354A1] A protective gas for a heat treatment furnace with several zones is generated from the exit gas from an air separation unit. The gas fraction containing mainly nitrogen is passed into the intake zone and if necessary the exit zone of the furnace without further removal of oxygen. The protective gas used in the heating or treatment zone is obtained from at least a part of the oxygen rich gas fraction from the air separation unit mixed with natural gas or propane by heating and catalytic conversion to mainly carbon monoxide and hydrogen. Also claimed is a heat treatment furnace with a protective gas generating plant that includes an air separation unit (1) and a unit (2) for reacting O2 with a hydrocarbon gas as described above.
IPC 1-7
IPC 8 full level
C21D 1/74 (2006.01); C21D 1/76 (2006.01); F25J 3/04 (2006.01)
CPC (source: EP)
C21D 1/74 (2013.01); C21D 1/763 (2013.01); F25J 3/04539 (2013.01); F25J 3/04563 (2013.01)
Designated contracting state (EPC)
AT DE FR GB IT
DOCDB simple family (publication)
EP 0778354 A1 19970611; EP 0778354 B1 20010404; AT E200307 T1 20010415; DE 19545764 A1 19970612; DE 19545764 C2 20000217; DE 59606708 D1 20010510
DOCDB simple family (application)
EP 96119651 A 19961206; AT 96119651 T 19961206; DE 19545764 A 19951207; DE 59606708 T 19961206