Carbothermic processes

Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium

Reexamination Certificate

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Details

C075S010270, C075S010180, C423S129000, C423S137000

Reexamination Certificate

active

07896945

ABSTRACT:
A mass of solid aluminium carbide containing product is produced by injecting particulate alumina into a bath (30) of molten aluminium metal; and injecting carbonaceous material, consisting of, containing or yielding carbon, into the bath (30). The bath (30) of molten aluminium metal is maintained at a superheated temperature to heat and react carbon with molten aluminium to produce solid aluminium carbide which mixes with alumina to form a mass (36) containing entrapped gas and entrapped molten aluminium metal and having a bulk or apparent density less than aluminium. The mass is allowed to accumulate as a mass of solid aluminium carbide containing product on the upper surface of the bath. The carbonaceous material is a hydrocarbon material or is produced by pyrolysis, decomposition or cracking of a hydrocarbon material.

REFERENCES:
patent: 4385930 (1983-05-01), Persson
patent: 4490169 (1984-12-01), Persson
patent: 6361580 (2002-03-01), Plahte et al.
patent: 6805723 (2004-10-01), Aune et al.
patent: 6849101 (2005-02-01), Fruehan et al.
patent: 2002/0170387 (2002-11-01), Lindstad
International Search Report for International Patent Application No. PCT/AU07/01986 dated Feb. 27, 2008.

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