Specialized metallurgical processes – compositions for use therei – Processes – Producing or purifying free metal powder or producing or...
Patent
1993-09-10
1995-11-28
Wyszomierski, George
Specialized metallurgical processes, compositions for use therei
Processes
Producing or purifying free metal powder or producing or...
148105, B22F 922
Patent
active
054703743
ABSTRACT:
The present invention is directed to a method for a continuous mass-production, on an industrial scale at a high efficiency, of magnetic metal particles having excellent magnetic properties by preventing particle deformation and mutual sintering of the particles in a reduction process, and/or by preventing deterioration of the magnetic properties and unevenness in the properties, particularly in the saturation magnetization, upon oxidation in a stabilization process. In this method, an iron compound based on iron oxyhydroxide can be thermally dehydrated in a thermal dehydration process. These processes can be conducted using apparatuses of the present invention which have a gas flow reactor; a belt conveyor being installed in the reactor and having a gass-passable belt for transporting the material; a gas dispersion plate; and a heating means.
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Patent Abstracts of Japan, vol. 9, No. 290 (M-430) Sep. 1991, Finish Heat Treatment Method for Iron Powder, Kokai No. 3-183701.
Arikita Shuhei
Hama Yoshinori
Ikeshita Shingo
Nakamura Hiroyuki
Kao Corporation
Wyszomierski George
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