Question

Direct coal is charged as fuel in:

• A. SR process
• B. COREX process
• C. ELRED process
• D. MIDREX process

Hint:

The COREX process is a cleaner alternative to the blast furnace, using \textbf{non-coking coal directly} — a major cost and environmental advantage.

Answer 1

The Correct Option is B

Step 1: Understanding the COREX Process
The COREX process is a smelting reduction method used for ironmaking. It is a more environmentally friendly alternative to the traditional blast furnace. One of the key features of the COREX process is that it uses non-coking (direct) coal directly as a reducing agent and energy source — eliminating the need for coke ovens. Step 2: Evaluation of Other Options
- (A) SR process (Smelting Reduction): A general category; may or may not use direct coal depending on the variant.
- (C) ELRED process: Involves electric reduction and does not utilize direct coal.
- (D) MIDREX process: Uses natural gas (not coal) as the primary reducing agent. Step 3: Advantages of COREX
- Utilizes direct coal, reducing environmental pollution from coke production.
- Economically viable where non-coking coal is abundantly available. Conclusion: Among the listed options, only the COREX process uses direct coal as fuel.