F - Mech Eng,Light,Heat,Weapons – 27 – D
Patent
F - Mech Eng,Light,Heat,Weapons
27
D
39/105, 53/90
F27D 3/18 (2006.01) C21C 5/46 (2006.01)
Patent
CA 1211630
ABSTRACT OF THE DISCLOSURE Herein disclosed is a lance structure for use with a top-blown converter. The lance structure is constructed to include a cylindrical sheath having a bottom wall and a flux supply tube disposed at the center of the sheath and defining a passage for carrying slag-forming flux in a powdered form. Further inclusive is an oxygen supply tube which is arranged in the sheath and around the flux supply tube and which defines an annular oxygen supply passage. From the oxygen supply tube, there lead a number of Laval nozzles which have their exits opened in the sheath bottom so that the oxygen gas supplied through the oxygen supply passage may be blown in the form of supersonic jets to penetrate into the molten iron contained in the converter. The flux supply tube is formed with ports which are opened into the Laval nozzles just upstream of the exits thereof to feed the flux together with a carrier gas to the supersonic oxygen jets so that the carrier gas flows may merge into the oxygen jets. Thus, the powdered flux can be uniformly dispersed in the oxygen jets without wearing and damaging the inner walls of the Laval nozzles and can be carried by the jets deeply into the molten iron.
426664
Manago Takashi
Nakajima Hidemasa
Okamura Shozo
Okane Kohji
Sueyasu Masanobu
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Sumitomo Metal Industries Ltd.
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