Process for producing varnish-bonded carbon-coated metal granules
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United States of America Patent
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Aug 6, 1985
Grant Date -
N/A
app pub date -
Mar 20, 1984
filing date -
Mar 20, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is provided wherein metal granules coated with a polymerizable oil are heated, while being mechanically mixed, to a polymerizing temperature to convert the oil coating to a varnish and the varnish coating thereafter heated to a higher temperature to decompose at least partially the varnish to carbon, thereby producing a carbon coating strongly bonded to the metal granules. The temperatures employed are below the melting point of the metal granules. The coating is preferably applied to magnesium, aluminum or alloys thereof for use as addition agents in steel, e.g., desulfurizing or deoxidizing agents, and may contain fine particles of at least one calcium compound.
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