Oxygen lance

Details Oxygen lance Oxygen lance

1981-10-13

1983-01-04

Rosenberg, P. D.

Metallurgical apparatus

Means for introducing fluent into vessel, e.g., tuyere

With flow control means or internal flow guide

75 60, C21B 716

Patent

active

043669530

ABSTRACT:
A lance for blowing oxygen from above into a ladle of an iron foundry has a nozzle head with at least four main tuyeres of larger diameter and as many ancillary tuyeres of smaller diameter, the larger tuyeres serving to blow into the melt for decarburizing the metal while the smaller ones promote afterburning of the evolving carbon monoxide just above the melt surface. The axes of the main tuyeres are inclined to the nozzle-head axis at an angle of about 14.degree. to 17.degree. while the axes of the ancillary tuyeres have an angle of inclination exceeding that of the main tuyeres by about 30.degree. to 50.degree.. In order to slow down the air flow through the ancillary tuyeres with reference to the surface-penetrating jets of the main tuyeres, the former are provided with inner peripheral inlays or grooves of annular or helicoidal shape.

REFERENCES:
patent: 3661560 (1972-05-01), Grenfell
patent: 4190238 (1980-02-01), Schoop
patent: 4303230 (1981-12-01), Bleloch

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