Question

Match the steel plant related processes in Column I with the associated information in Column II. Column I: P. Corex
Q. Electric Arc Furnace
R. Midrex
S. Continuous Casting
Column II: 1. Melter-gasifier
2. Natural gas reformer
3. Electromagnetic stirrer
4. Hot heel

• A. P – 1, Q – 4, R – 2, S – 3
• B. P – 1, Q – 4, R – 3, S – 2
• C. P – 2, Q – 4, R – 1, S – 3
• D. P – 1, Q – 3, R – 2, S – 4

Hint:

For "Match the Column" questions, break down each item and recall its defining feature. Corex → Melter-gasifier, Midrex → Natural gas reformer, EAF → Hot heel, Continuous Casting → Electromagnetic stirrer. This way, you eliminate confusion and directly reach the correct option.

Answer 1

The Correct Option is A

Step 1: Understand each process in Column I.
- Corex: It is an advanced smelting reduction process. The heart of this technology is the \emph{melter-gasifier}, which produces liquid hot metal without using coke ovens.
- Electric Arc Furnace (EAF): This furnace produces steel by melting scrap using electrical energy. The EAF process maintains a \emph{hot heel} (a small pool of molten steel retained between heats) to facilitate faster melting and reduce start-up energy.
- Midrex: This process is the most widely used direct reduction process that employs a \emph{natural gas reformer} to convert natural gas into reducing gases (CO + H\(_2\)) for producing Direct Reduced Iron (DRI).
- Continuous Casting: This process solidifies molten steel into semi-finished billets/slabs. A crucial part is the use of an \emph{electromagnetic stirrer}, which improves the internal quality of cast steel by controlling solidification.
Step 2: Match each process with Column II.
- P. Corex → 1. Melter-gasifier
- Q. Electric Arc Furnace → 4. Hot heel
- R. Midrex → 2. Natural gas reformer
- S. Continuous Casting → 3. Electromagnetic stirrer
Step 3: Verify with options.
- (A) P–1, Q–4, R–2, S–3 → All correct.
- (B) P–1, Q–4, R–3, S–2 → Midrex wrongly matched, Continuous casting wrongly matched.
- (C) P–2, Q–4, R–1, S–3 → Corex and Midrex swapped incorrectly.
- (D) P–1, Q–3, R–2, S–4 → EAF and Continuous Casting swapped incorrectly.
Step 4: Conclude.
The correct matching is option (A). \[ \boxed{\text{Correct Answer = (A) P–1, Q–4, R–2, S–3}} \]