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Liquid steel (300 metric tons) initially containing 0 03 mass sulfur...

This question belongs to Metallurgical Engineering Steel Making In Metallurgy
Steel Making in Metallurgy
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Liquid steel (300 metric tons) initially containing 0.03 mass% sulfur, is desulphurised with calcium (1000kg) according to the reaction, Ca + [S] = Ca S. The slag (1 metric ton) lying on top of metal contains (in mass%) 50% CaO, 25% SiO2 and the rest is Al2O3. Only 10 mass% of the CaO injected reacts with the sulfur and the rest escapes as gas into the atmosphere.
What will be the final sulfur content, in mass% in liquid steel?

Answer & Solution
Correct Answer: Option D
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