EP 0156745 B1 19870318 - TUNNEL-TYPE MUFFLE OVEN FOR THERMAL TREATMENT
Title (en)
TUNNEL-TYPE MUFFLE OVEN FOR THERMAL TREATMENT
Publication
Application
Priority
FR 8404330 A 19840314
Abstract (en)
[origin: US4568279A] This invention relates to a muffle furnace, for continuous heat treatment during passage of material therethrough, of products, the production cycle of which includes a treatment of predetermined duration at a temperature which may be about 1100 DEG to about 1150 DEG C., which furnace is heated by a flame producing burner without the combustion gases directly contacting the products to be treated. This furnace comprises: an inlet zone provided with a means for preheating, by circulating recycled combustion gases in a double casing provided around the muffle; a heating zone, provided inside a heat-insulated chamber provided with at least one means for circulating combustion gases around the heating zone of the muffle; and an outlet zone provided with at least one means for controlling the cooling rate of the treated product. For the heat treatment of refractory or carbon-containing products, impregnated with a carbon-containing material such as pitch, the pyrolysis of which produces combustible vapors, the heating zone is divided into three sections by means of an additional partition: a zone for exuding and removing volatile materials from the pitch; a zone for pyrolyzing and carbonizing the pitch; and a final firing zone.
IPC 1-7
IPC 8 full level
C21D 9/00 (2006.01); F27B 5/00 (2006.01); F27B 9/00 (2006.01); F27B 9/10 (2006.01)
CPC (source: EP KR US)
C21D 9/0043 (2013.01 - EP US); F27B 5/00 (2013.01 - EP US); F27B 9/00 (2013.01 - KR); F27B 9/10 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0156745 A1 19851002; EP 0156745 B1 19870318; AT E26014 T1 19870415; BR 8501121 A 19851105; CA 1228704 A 19871103; DE 3560094 D1 19870423; ES 541214 A0 19860401; ES 8606621 A1 19860401; FR 2561365 A1 19850920; FR 2561365 B1 19871009; IN 164159 B 19890121; JP S60213787 A 19851026; JP S628712 B2 19870224; KR 850007877 A 19851209; KR 920001359 B1 19920211; US 4568279 A 19860204; ZA 851883 B 19851127
DOCDB simple family (application)
EP 85420045 A 19850313; AT 85420045 T 19850313; BR 8501121 A 19850413; CA 476404 A 19850313; DE 3560094 T 19850313; ES 541214 A 19850313; FR 8404330 A 19840314; IN 146MA1985 A 19850220; JP 4918285 A 19850312; KR 850001560 A 19850312; US 70851985 A 19850305; ZA 851883 A 19850313