Process and apparatus for producing a high purity magnesia fine

Details Process and apparatus for producing a high purity magnesia fine Process and apparatus for producing a high purity magnesia fine

1984-05-16

1985-10-08

Doll, John

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

422111, 422202, C01B 3318

Patent

active

045459754

ABSTRACT:
A high density magnesia fine powder having an improved sintering property is produced in such a manner that magnesium is vaporized at 700.degree. C. or more in a magnesium-vaporizing refractory tube while an inert gas flows through the magnesium-vaporizing tube; the flow of the vaporized magnesium-containing inert gas is introduced into a magnesium-oxidizing tube; a molecular oxygen-containing gas is introduced into the magnesium-oxidizing tube in a concurrent relationship to the flow of the vaporized magnesium-containing inert gas to provide a reaction mixture, while the temperature of the magnesium-oxidizing region is adjusted to 800.degree. C. to 1600.degree. C. and the partial pressures of the vaporized magnesium and oxygen in the magnesium-oxidizing region are regulated to 0.09 atmospheres or less and 1/2 times or more that of the vaporized magnesium; the flow of the reaction mixture containing the resultant magnesia fine powder is introduced into a magnesium-collecting box; and the magnesia fine powder is collected from the reaction mixture.

REFERENCES:
patent: 2273707 (1942-02-01), Heath et al.
patent: 2454733 (1948-11-01), Dahl
patent: 3451773 (1969-06-01), Muller
patent: 3848068 (1974-11-01), Rice
patent: 3899573 (1975-08-01), Shaw et al.

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