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1. (WO2017178608) BLOWING LANCE NOZZLE

Pub. No.:    WO/2017/178608    International Application No.:    PCT/EP2017/058977
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Fri Apr 14 01:59:59 CEST 2017
IPC: F27B 3/22
C21C 5/32
C21C 5/46
F27D 3/16
C21C 5/35
Applicants: SOUDOBEAM SA
Inventors: THOMAS, Jean-Philippe
Title: BLOWING LANCE NOZZLE
Abstract:
Blowing lance nozzle comprising a central stirring gas-supply tube (2), an inner coolant-inlet tube (5), an outer coolant-outlet tube (10) closed, at one end facing the bath, by a third front wall (12), a heat exchange space (16), and a stirring gas-outlet pipe (17), referred to as an injector and leading from each opening (4) in the front wall (3) up to the corresponding outlet opening (13), and having an inner wall with a first curved and convergent-profile portion (I), a neck (19) with a predetermined minimum diameter, and a second portion (II) having a curved profile that diverges up to said outlet (13), in which second portion (II) there is a change in the curvature sign defined by an inflection point (21) in an axial cross-section of said pipe.