Carbon purification process

Details Carbon purification process Carbon purification process

1975-01-21

1976-05-18

Andrews, M. J.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423449, C10B 5700

Patent

active

039579581

ABSTRACT:
In accordance with a preferred embodiment of this invention, a low-sulfur, low-ash, graphitic carbon, which is useful in metallurgical and electrical applications, is formed. The first step is dissolving coke or coal in an iron melt containing about 4% silicon, then lowering the temperature of the melt to near the iron-carbon eutectic melting temperature, thereby causing a purified carbon-iron mixture to precipitate and float to the surface. This mixture may be directly used as a metallurgical carbon raiser to control the carbon content of iron melts. The purified carbon may also be separated from the iron by magnetic and/or flotation techniques; further refinement of the graphite may be accomplished by treatment with mineral acids.

REFERENCES:
patent: 1239992 (1917-09-01), Weissmann
patent: 1328845 (1920-01-01), Osgood
Making, Shaping & Treating of Steel, 7th 7th Edition, 1-27-58, pp. 251-252.

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