Question:
First impurity to get removed in LD steel making is
First impurity to get removed in LD steel making is
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Order of Oxidation: Si $\rightarrow$ Mn $\rightarrow$ C $\rightarrow$ P. Silicon always goes first.
Updated On: Jul 4, 2026
- Phosphorus
- Carbon
- Silicon
- Manganese
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The Correct Option is C
Solution and Explanation
Step 1: Concept Refining in the Linz-Donawitz (LD) converter involves the selective oxidation of impurities from hot metal using a high-purity oxygen jet.
Step 2: Meaning The order of removal depends on the thermodynamic stability (affinity for oxygen) of the impurity oxides.
Step 3: Analysis Silicon has the highest affinity for oxygen among the common impurities. It oxidizes rapidly to form $SiO_{2}$, which then reacts with added lime to form slag.
Step 4: Conclusion Therefore, Silicon is the first impurity to be eliminated during the oxygen blow in LD steelmaking. Final Answer: (C)
Step 2: Meaning The order of removal depends on the thermodynamic stability (affinity for oxygen) of the impurity oxides.
Step 3: Analysis Silicon has the highest affinity for oxygen among the common impurities. It oxidizes rapidly to form $SiO_{2}$, which then reacts with added lime to form slag.
Step 4: Conclusion Therefore, Silicon is the first impurity to be eliminated during the oxygen blow in LD steelmaking. Final Answer: (C)
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