Preparation of ferrite from used dry cells

Details Preparation of ferrite from used dry cells Preparation of ferrite from used dry cells

1996-09-11

1998-01-13

Bonner, Melissa

Compositions

Magnetic

Iron-oxygen compound containing

252 6262, 241 24, 241 23, H01M 652, B09B 500, H01F 134, C04B 3526

Patent

active

057075417

ABSTRACT:
Used dry cells are sorted into ultra-high power manganese dry cells and high power manganese dry cells including alkaline manganese cells. Line (I) of FIG. 1 includes crushing the ultra-high power manganese dry cells into fragments, sieving the fragments to collect a first fraction of depolarizer mass and a second fraction of metal casings, calcining the first fraction to form manganese and zinc oxides, and processing the oxides into a ferrite having a higher MnO/ZnO ratio. Line (II) of FIG. 1 includes crushing the high power manganese dry cells including alkaline manganese cells into fragments, sieving the fragments to collect a third fraction of depolarizer mass, adding zinc cans from the second fraction to the third fraction, calcining the mixture to form manganese and zinc oxides, and processing the oxides into another ferrite having a lower MnO/ZnO ratio.

REFERENCES:
patent: 5498360 (1996-03-01), Kanemaru et al.
patent: 5575907 (1996-11-01), Lindermann
Database WPI, Derwent Publications, AN 95-110350, JP-A-07 033 442, Feb. 3, 1995.

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