Process for refining crude magnesium

Details Process for refining crude magnesium Process for refining crude magnesium

1993-01-21

1994-02-01

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

75604, C22B 2622

Patent

active

052828824

ABSTRACT:
The invention relates to a process for refining crude magnesium, and, in particular, the magnesium obtained by reducing the magnesium ore using iron-silicon.
The process consists in treating the liquid magnesium with a metallic sulphide such as iron monosulphide, iron bisulphide or molybdenum bisulphide.
The sulphides are contacted with the metallic bath which is agitated to promote the liquid-solid reactions and the formation of insoluble products which precipitate.
This contacting is followed by decantation of the insoluble products and their separation from the refined magnesium.
The process permits a significant reduction in the contents of calcium and silicon.

REFERENCES:
patent: 4390364 (1983-06-01), Yu
patent: 4417920 (1983-11-01), Mena et al.

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