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Oxygen control 

Q: Oxygen Control

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Question Which addition(s) could be made to de-oxidise the molten steel at 1600C?

 

Red cross Al - You are correct in that Al can be used to de-oxidise molten steel since it has a free energy lower than that of the carbon + oxygen reaction but it is not the only addition that could be used. Try again.

Green tick Al + Si - Correct. Both of these additions could be used as their free energies of reaction are more negative than the carbon + oxygen reaction.

Red cross Al + Si + Mn + Cr - Incorrect, it is not possible to use all of these additives as the Mn and Cr lines lie above the C + O = CO line at 1600C. Try again

Red cross Mn + Cr - Incorrect, it is not possible to use Mn and Cr as their lines lie above the C + O = CO line at 1600C. Try again

Red cross Try again.

Red cross Try again.

    

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NOTEPAD

Well done.

 

 
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