The Ores that are concentrated by Froth flotation method

Options

A. Carbonate
B. Sulphides
C. Oxides
D. Phosphates

Answer

### Step-by-Step Solution:

1. **Understanding Froth Flotation Method**: The froth flotation method is a technique used for the concentration of ores. It is particularly effective for separating hydrophobic materials from hydrophilic ones.

2. **Identifying Types of Ores**: The question asks about the types of ores that can be concentrated using the froth flotation method. Common types of ores include carbonates, sulfides, oxides, and phosphates.

3. **Analyzing the Froth Flotation Process**: In the froth flotation process, a reagent (such as pine oil) is added to the ore slurry. This reagent selectively adheres to certain minerals, making them hydrophobic (water-repelling).

4. **Role of Pine Oil**: Pine oil is specifically used in the froth flotation process because it selectively wets sulfide ores. This means that sulfide ores will attach to the air bubbles created in the slurry and rise to the surface as froth.

5. **Conclusion**: Based on the selective wetting property of pine oil, we conclude that only sulfide ores can be effectively concentrated using the froth flotation method. Therefore, the correct answer is sulfide ores.

### Final Answer:
The ores that are concentrated by the froth flotation method are sulfide ores.

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