Agent for desulfurization, dephosphorization, desiliconizing and

Details Agent for desulfurization, dephosphorization, desiliconizing and Agent for desulfurization, dephosphorization, desiliconizing and

1993-12-14

1995-01-31

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Compositions

Solid treating composition for liquid metal or charge

75312, 75318, 75322, 75326, C21C 702

Patent

active

053855990

ABSTRACT:
An agent for desulfurization, dephosphorization, desiliconizing, and denitriding of ironmelt and melt containing chromium or manganese, consisting of at least one of the following mineral raw-material: alkali-containing plagioclase (feldspar), alkali-containing orthoclase, montmorillonite (perlite), bentonite, muscovite, or zeolithe, and calcium carbide and/or calcium oxide.
These mixtures can be blended further with scale, Fe-ores, Cr-ores or Mn-ores and used by standard technologies. The mineralic components, in connection with calcium carbide, lime, iron-ore or scale or other related ores, cause an effective reduction of unwanted elements, such as sulfur, phosphorus, silicium, and nitrogen, in the metal melts.
The slags produced are freely skimmed and contain less iron granules than standard agents. Some of these materials may be enriched with alkali oxides by sintering or melting with appropriate compounds, like soda ash.
This invention also involves a process for the treatment of iron-, ferrochromium and ferromanganese melts, wherein the components of the agent are fed either pre-mixed or separately into the melt.

REFERENCES:
patent: 3258327 (1966-06-01), Smoot
patent: 4147539 (1979-04-01), Kekish
patent: 4358312 (1982-11-01), Braun
patent: 4988387 (1991-01-01), Schrodter

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