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**:
- Froth flotation is a process used for selectively separating hydrophobic materials from hydrophilic ones. It is commonly used in the mining industry to concentrate ores.

2. **Identifying the Types of Ores**:
- The froth flotation method is particularly effective for concentrating sulfide ores. This is because sulfide minerals have a natural tendency to attach to air bubbles, allowing them to float to the surface.

3. **Common Sulfide Ores**:
- Some of the common ores that are concentrated using the froth flotation method include:
- **Copper Sulfides**: Such as chalcopyrite (CuFeS2) and bornite (Cu5FeS4).
- **Lead Sulfides**: Such as galena (PbS).
- **Zinc Sulfides**: Such as sphalerite (ZnS).
- **Nickel Sulfides**: Such as pentlandite ((Ni,Fe)9S8).

4. **Process Overview**:
- In the froth flotation process, the crushed ore is mixed with water and chemicals that help to separate the desired minerals from the waste material. Air is then introduced, creating bubbles that the hydrophobic minerals attach to, forming a froth that can be skimmed off.

5. **Conclusion**:
- In summary, the ores that are concentrated by the froth flotation method are primarily sulfide ores, including copper, lead, zinc, and nickel sulfides.