Process for the desulphurization treatment of pig iron melts

Details Process for the desulphurization treatment of pig iron melts Process for the desulphurization treatment of pig iron melts

1992-08-18

1994-11-22

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75533, 75536, 75537, 75539, C21C 706, C21C 7064

Patent

active

053665392

ABSTRACT:
The invention relates to a process for the desulphurization treatment of a pig iron melt in a container. The characterizing feature of the invention is that the treatment is performed in three phases:
In the initial phase such solids are injected that deoxidize the initial slag and increase its basicity and also produce a circulatory movement of the melt and form a basic deoxidized cover slag. In the middle phase the desulphurizing agent is injected for the main desulphurization and in the final phase such solids are injected that purify the melt and produce a final desulphurization and also so influence the desulphurization slag formed that its content of iron granules is low.

REFERENCES:
patent: 3955966 (1976-05-01), Meichsner
patent: 4832739 (1989-05-01), Meichsner et al.
patent: 4915732 (1990-04-01), Cameron et al.
G. E. DeRusha, Jr., "Sequenced Iron Desulfurization by Calcium Carbide/Mg Co-Injection", 73rd Steelmking Conf. Proc., vol. 73, No. 24, Mar. 1990, pp. 351-355.

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