Haematite ore is conentrated by:

Options

A. gravity separation method
B. froth floatation process
C. amalgamation
D. hand picking

Answer

To solve the question "Haematite ore is concentrated by:", we will analyze the options provided and determine the correct method for concentrating haematite ore.

### Step-by-Step Solution:

1. **Understanding Haematite Ore**:
- Haematite (Fe2O3) is an iron oxide and is one of the primary ores of iron. It is usually found in a powdered form and contains impurities that need to be removed for effective extraction of iron.

2. **Evaluating the Options**:
- **Option 1: Gravity Separation Method**: This method involves separating particles based on their density. Heavier ore particles settle down while lighter impurities are washed away with water. This is effective for haematite due to its higher density compared to many impurities.

- **Option 2: Froth Flotation Process**: This method is used for concentrating ores that have a significant difference in hydrophobicity. It is not typically used for haematite.

- **Option 3: Amalgamation**: This method is primarily used for the concentration of gold and silver ores using mercury. It is not applicable for haematite.

- **Option 4: Hand Picking**: This is a manual method of separation and is not efficient for large quantities of haematite ore.

3. **Conclusion**:
- The most suitable method for concentrating haematite ore is the **Gravity Separation Method**. This method effectively separates the heavier haematite particles from lighter impurities using water.

### Final Answer:
Haematite ore is concentrated by **Gravity Separation Method**.

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