Process for the preparation of calcium aluminates from aluminum

Details Process for the preparation of calcium aluminates from aluminum Process for the preparation of calcium aluminates from aluminum

1993-09-23

1995-04-18

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Compositions

Solid treating composition for liquid metal or charge

75568, 75570, 75672, 75751, C22B 2106

Patent

active

054074592

ABSTRACT:
The present invention is concerned with a process for the preparation of sintered calcium aluminates that can generally be used as a protective cover for liquid metals, and particularly steel, and the process comprising the steps of mixing calcium oxide, or its precursor, particles and aluminum dross residue, such as NOVAL.TM.; calcining the resulting mixture; maintaining a calcining temperature of 1200.degree. C. or higher for approximately 5 minutes or more which is sufficient to form a friable sintered product rich in calcium aluminates; and recovering the sintered product after cooling. Optionally, calcium fluoride, or other fluoride can be added to the starting mixture, if it is not already contained in the dross residue.

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patent: 4997476 (1991-03-01), Lindsay et al.
patent: 5135565 (1992-08-01), Gens

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