Question:
Which condition is not essential for desulphurization in an LD converter?
Which condition is not essential for desulphurization in an LD converter?
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Desulphurization improves with fluid (low viscosity) basic slag.
Updated On: Jun 29, 2026
- High temperature
- Basic slag
- High viscosity and low fluidity of slag
- Good slag-metal contact
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Concept:
Desulphurization in LD converter requires:
- basic slag (CaO-rich)
- high temperature
- good mixing/contact between slag and metal
Reaction:
\[
S + CaO \rightarrow CaS + O
\]
Step 1: Role of slag properties.
Efficient desulphurization needs: - low viscosity slag for good mass transfer - high fluidity improves reaction kinetics
Step 2: Check options.
(A) High temperature → required (B) Basic slag → required (C) High viscosity & low fluidity → NOT required (D) Good contact → required Final Answer: \[ \boxed{\text{High viscosity and low fluidity of slag}} \]
Step 1: Role of slag properties.
Efficient desulphurization needs: - low viscosity slag for good mass transfer - high fluidity improves reaction kinetics
Step 2: Check options.
(A) High temperature → required (B) Basic slag → required (C) High viscosity & low fluidity → NOT required (D) Good contact → required Final Answer: \[ \boxed{\text{High viscosity and low fluidity of slag}} \]
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