Question

Primary step of ore processing is:

• A. Grinding
• B. Crushing
• C. Magnetic separation
• D. Jigging

Hint:

In metallurgy, \textbf{crushing} is the very first step to reduce the size of ore before any concentration or refinement can take place.

Answer 1

The Correct Option is B

Step 1: Sequence of Ore Processing
Ore processing begins with the physical methods of size reduction. The goal is to liberate valuable minerals from the gangue. The standard sequence includes: % Option (A) Crushing: The first mechanical step, used to break large ore chunks into smaller pieces. % Option (B) Grinding: Follows crushing; reduces ore to finer particles for further concentration. % Option (C) Concentration methods: Techniques like magnetic separation, froth flotation, and gravity separation follow to enrich the ore. Step 2: Evaluating the Options
- Crushing is the primary step to reduce ore size initially.
- Grinding occurs after crushing to further reduce size.
- Magnetic separation and Jigging are concentration methods, not primary steps. Conclusion: The first or primary step in ore processing is crushing.