Process for the production of high purity iron powder

Details Process for the production of high purity iron powder Process for the production of high purity iron powder

1981-12-09

1982-12-14

Hearn, Brian E.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BA, 75 1R, 423632, C22B 100, C22B 500

Patent

active

043636527

ABSTRACT:
The removal of silica from an iron-bearing source which is treated to produce an iron powder which may be used in powder metallurgical applications may be facilitated by subjecting the reduced iron-bearing source such as magnetite to a sparge with an oxygen-containing gas such as oxygen or air prior to a caustic leach step. The sparge of the caustic-magnetite slurry is effected at ambient temperatures and pressures which may range from about 10 to about 1000 psi for a period of time ranging from about 0.1 to about 1 hour. By utilizing this sparge, the leaching capacity of the caustic leach solution appreciably increased.

REFERENCES:
patent: 4136158 (1979-01-01), Okuda et al.
patent: 4154608 (1979-05-01), Carey et al.

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