Method of desulfurization of a steel melt

Details Method of desulfurization of a steel melt Method of desulfurization of a steel melt

1974-04-17

1976-09-14

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, 75 58, 75129, C21C 710, C22C 3300

Patent

active

039804690

ABSTRACT:
A steel melt is confined and subjected to a partial vacuum. A particulate additive is entrained by a neutral nonreactive carrier gas and introduced into the melt below the surface thereof at a depth such that the additive is immediately vaporized and rises toward the surface of the melt in the form of bubbles which react with components of the melt. With particulate calcium as the additive an injection depth 1500 mm, a temperature of approximately 1500.degree.C, and a vacuum of 20 Torr allows the sulfur content of a steel melt readily to be reduced below 0.005% by weight.

REFERENCES:
patent: 3001864 (1961-09-01), Muller
patent: 3060015 (1962-10-01), Spolders
patent: 3367646 (1968-02-01), Robertson
patent: 3467167 (1969-09-01), Mahin
patent: 3512957 (1970-05-01), Brotzmann
patent: 3545960 (1970-12-01), McClellan
patent: 3547622 (1970-12-01), Hutchinson
patent: 3575695 (1971-04-01), Miyashita
patent: 3598383 (1971-08-01), Moore

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