Method for the individual marking of precooked anodes for the electrolytic production of aluminum
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United States of America Patent
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-
Jul 12, 1988
Grant Date -
N/A
app pub date -
Jun 15, 1987
filing date -
Jun 19, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a method for the individual marking of precooked anodes used in the production of aluminum by electrolysis in the Hall-Heroult process, and to the anodes produced thereby. These anodes are produced by hot compaction of a carbonaceous paste, and according to the invention, during or immediately after such compaction, a plurality of impressions is formed in the upper part of each anode. The impressions are depressions and/or relief portions, constitute a digital coding for the identification number of each anode, and remain legible until withdrawal of the components of the butt of the worn anode from the electrolysis tank. The marking can be carried out using a binary or ternary code, where the reference plane of the zone of the anode which carries the marking corresponds to a first digit, with other digits corresponding to depressions of a particular depth, depressions of a greater depth, or relief portions.
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