Method of producing steel with the lowest possible sulfur conten

Details Method of producing steel with the lowest possible sulfur conten Method of producing steel with the lowest possible sulfur conten

1978-11-09

1980-03-25

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, 75130R, C21C 702

Patent

active

041949030

ABSTRACT:
A method of producing steel with the lowest possible desired sulfur content by desulfurization of pig iron with magnesium coke. The magnesium coke is introduced into the pig iron smelt which is to be desulfurized. An inert gas such as nitrogen is then introduced into the smelt to agitate same until the magnesium is completely reacted. The thus treated smelt is subjected to subsequent inert gas rinsing in order to separate magnesium sulfide from the smelt and convey to into the slag formed on the smelt. A slag-free area is then produced on the surface of the smelt by introducing inert rinsing gas on the surface. Slag powder is introduced upon the exposed surface of the smelt to form a cohesive, viscous slag, which is then withdrawn. Scrap iron having suitable high or low sulfur content may be introduced into the desulfurized pig iron to adjust the desired sulfur content thereof.

REFERENCES:
patent: 3598575 (1971-08-01), Jarysta
patent: 3656989 (1972-04-01), Layland
patent: 3827680 (1974-08-01), Wheeler
patent: 3885957 (1975-05-01), Richter
patent: 3929464 (1975-12-01), Todd
patent: 3957502 (1976-05-01), Cull
patent: 3998625 (1976-12-01), Koros

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