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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?

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,

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?

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?

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

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?

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

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?

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

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?