EP 0364722 B1 19930512 - OXYGEN BLAST PIPE
Title (en)
OXYGEN BLAST PIPE
Publication
Application
Priority
LU 87353 A 19880928
Abstract (en)
[origin: EP0364722A1] Lance for injecting refining oxygen from above into baths of metals or of ferrous alloys contained in metallurgical vessels. In its end part the lance comprises a Laval tuyere defining in the direction of flow of the gas firstly a converging region, then a cylindrical throat and finally a diverging region. It further comprises a substantially cylindrical movable central regulating body which can be moved forward or back axially in the neck region of the Laval tuyere. The nose of the central regulating body has a special profile which, together with the outer coaxial cylindrical wall of the Laval tuyere, defines a diverging region which causes an expansion of the gas stream. The profile of the nose of the movable central body and that of the converging portion of the Laval tuyere are at least approximately complementary. The characteristics of the gas stream are modified through changing its flow profile by axial movement of the nose of the central regulating body. <IMAGE>
IPC 1-7
IPC 8 full level
C21C 5/46 (2006.01); C21C 7/072 (2006.01)
CPC (source: EP US)
C21C 5/4606 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0364722 A1 19900425; EP 0364722 B1 19930512; AT E89322 T1 19930515; AU 4014189 A 19900405; AU 615100 B2 19910919; BR 8904939 A 19900508; CA 1338688 C 19961105; DE 68906507 D1 19930617; DE 68906507 T2 19931007; ES 2041381 T3 19931116; JP 2786266 B2 19980813; JP H02115315 A 19900427; LU 87353 A1 19900406; US 4993691 A 19910219
DOCDB simple family (application)
EP 89116608 A 19890908; AT 89116608 T 19890908; AU 4014189 A 19890823; BR 8904939 A 19890926; CA 609696 A 19890829; DE 68906507 T 19890908; ES 89116608 T 19890908; JP 22763789 A 19890904; LU 87353 A 19880928; US 39510489 A 19890817