Multi-step steelmaking refining method

Details Multi-step steelmaking refining method Multi-step steelmaking refining method

1982-03-25

1983-11-15

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

C21C 700

Patent

active

044153597

ABSTRACT:
The impurities of molten pig iron produced by a blast furnace are removed exclusively in a converter, according to the conventional steelmaking refining method.
The desulfurization and dephosphorization, which have been conventionally achieved in a converter, are replaced by the desulfurization and dephosphorization during the pretreatment of the molten pig iron, according to recently developed steelmaking methods. In the multi-step steelmaking refining method, such oxygen-blowing as that employed for the conventional converter would result in a rather violent spitting and reduction in recovery of iron.
It is an object of the present invention to provide a multi-phase steelmaking refining method, in which decarburization is carried out without causing the disadvantages in the prior art.
The objects of the present invention are achieved by the following:

REFERENCES:
patent: 3854932 (1974-12-01), Bishop

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