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  • 1.  Carbon in Magnesia/ alumina bricks (MAC)

    Posted 08-04-2023 18:32

    Hi all,

    I have been asked to analyze the carbon content in magnesia/alumina/ carbon bricks (MAC), I would like to know if there are any members that are experienced in this type of analysis.

    I have tried ICP, XRF and XRD for the Mg and alumina levels. No problem, except alumina is hard to get into solution.

    The real problem is with quantifying the carbon, any suggestions?



    ------------------------------
    Robert Talley
    Materials Chemist
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  • 2.  RE: Carbon in Magnesia/ alumina bricks (MAC)

    Posted 08-08-2023 09:07

    Hi Robert,

    I am not confirmed about carbon detection in the materials you are using, but I aways used Leco Carbon-Sulfur Analyzer for accurate carbon content. You may want to contact Leco and ask them. I am sure they will be able to help you. So far to my knowledge, it is the only equipment which determines accurate carbon content. 

    Thanks,



    ------------------------------
    Sanjay Kulkarni
    Materials Engineer
    MSSC
    2040 Crooks RD, Suite A
    Troy, MI 48084
    sanjay.kulkarni@msscna.com
    Cell: 248-840-1056
    ------------------------------



  • 3.  RE: Carbon in Magnesia/ alumina bricks (MAC)

    Posted 08-12-2023 06:29
    Thank you Sanjay, that has been my experience also. I am looking into it.

    ---------------------------------
    Robert Talley
    Branch Chief
    DHS CBP Chicago Laboratory
    Chicago IL
    (219) 671-5390
    ---------------------------------



    Original Message


  • 4.  RE: Carbon in Magnesia/ alumina bricks (MAC)

    Posted 08-15-2023 09:07

    Hello Robert,

    The carbon measurement in refractories is non-trivial. The following procedure can be used when small amounts of carbon is present:

    1. Grind refractory using a carbon free grinding media such as partially stabilized zirconia.
    2. Dissolve in either hot sodium hydroxide or a mixture of fluorides/cryolite.
    3. Collect residue and measure carbon using combustion analysis.

    The high carbon refractories can be analyzed after grinding, followed by oxidation in oxygen rich atmosphere at high temperatures.

    Thanks



    ------------------------------
    [Ratnesh] [Dwivedi]
    [President]
    [RKD ENGG, LLC]

    www.rkdengg.com
    ------------------------------



  • 5.  RE: Carbon in Magnesia/ alumina bricks (MAC)

    Posted 08-25-2023 12:04
    Thank you, much appreciated. Is there a written method for this procedure? Such as an ASTM method?
    Thanks

    ---------------------------------
    Robert Talley
    Branch Chief
    DHS CBP Chicago Laboratory
    Chicago IL
    (219) 671-5390
    ---------------------------------



    Original Message


  • 6.  RE: Carbon in Magnesia/ alumina bricks (MAC)

    Posted 08-25-2023 14:07
    You may check:

    ISO 21068-1:2008(en)
    Chemical analysis of silicon-carbide-containing raw materials and refractory products - Part 1: General information and sample preparation



    Original Message


  • 7.  RE: Carbon in Magnesia/ alumina bricks (MAC)

    Posted 08-25-2023 14:50
    This another source that can be reviewed:




    Original Message