a)  In RH degassing, liquid steel is circulated through the vacuum chamber in order to lower the hydrogen content from 6ppm to 3ppm in 15 minutes. Molten steel attains equilibrium with to hydrogen.

Given:      
Molten steel in .
Pressure inside vacuum
The molten steel analyzes  and rest iron.
Interaction parameter  and  
Calculate rate of circulation of molten steel.

Solution

  

 


 
 .

 

 

 

 

 

 

 Ans.

b)  Repeat the above calculations when  and When pressure inside the chamber

Discuss the results in terms of technology development and requirements (refer lecture 25,26)