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Thread: Pretreatment of a graphite crucible

  1. #1
    Join Date
    Jul 2010
    Location
    The Netherlands
    Posts
    429

    Default Pretreatment of a graphite crucible

    Morning all.
    I have a inherited an electric furnace for melting metals. I have had it safety tested and purchased some new graphite crucibles for its use. Question, do I pretreat the graphite crucible with borax powder in the same way as the ceramic scorifier?

    Thanks so much,
    Les.
    Poor old Les

  2. #2
    Join Date
    Dec 2009
    Location
    Central London
    Posts
    8,845

    Default

    There's a lot of information here Les, If youncan separate the wheat from the chaff, so to speak. Dennis.
    https://www.google.com/search?client...VjPC5EQ4dUDCAo

  3. #3
    Join Date
    Jul 2010
    Location
    The Netherlands
    Posts
    429

    Default

    Thanks Dennis, the consensus appears to be 300 degrees in the oven for about an hour to drive out moisture then coated with borax.

    Cheers.
    Poor old Les

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