Method of producing magnetic powders from heavy metal sludges

Details Method of producing magnetic powders from heavy metal sludges Method of producing magnetic powders from heavy metal sludges

1991-10-03

1993-06-22

Wyszomierski, George

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

75348, 75353, 75961, 588232, C22B 910, B22F 920

Patent

active

052213234

ABSTRACT:
A preparation method of magnetic powders by using ferric compounds added to heavy metal sludges, and then heating under an atmosphere control and at adequate temperature so as to convert heavy metal sludges into magnetic ferrite powders. Owing to the obtained magnetic ferrite powders possess strong surface activity and cannot dissolve in weak acid or alkaline solution, they can be widely applied on waste water treatments.

REFERENCES:
patent: 4409020 (1983-10-01), Holman et al.
patent: 4420401 (1983-12-01), Kretas et al.

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