Question

Which of the following is used as a stabilizer during the concen tration of sulphide ores?

• A. Fatty acids
• B. Pine oil
• C. Cresol
• D. Xanthates

Hint:

Cresols are used as froth stabilizers in the concentration of sulfide ores by froth f lotation

Answer 1

The Correct Option is C

To understand why cresol is used as a stabilizer during the concentration of sulphide ores, let's delve into the process of froth flotation. This is the primary method used for concentrating sulphide ores.

Froth Flotation Process:

• The froth flotation process involves mixing the powdered ore with water to form a slurry.
• Collectors, such as xanthates, are added to make the sulphide ore particles hydrophobic (water-repellent).
• Pine oil is added to enhance the frothing action, allowing air bubbles to form and carry the mineral particles to the surface.
• A stabilizer is necessary to maintain the integrity of these froth bubbles and ensure a selective separation of ore particles.

Role of Stabilizers:

• Stabilizers prevent the froth from breaking too early, allowing for effective separation of ores from impurities.
• Cresol, used as a stabilizer, works by maintaining the froth's stability, preventing collapse before the separation is complete.

Evaluation of Options:

1. Fatty Acids: These are generally used as collectors or frothers but not as stabilizers.
2. Pine Oil: Acts primarily as a frother but not a stabilizer.
3. Cresol: Correctly used as a stabilizer, ensuring froth stability during the flotation process.
4. Xanthates: Function primarily as collectors, aiding in the attachment of mineral particles to bubbles but not in stabilizing the froth.

Thus, the correct answer is that cresol is used as a stabilizer during the concentration of sulphide ores. This understanding of the role of different agents within the froth flotation process underscores the importance of selecting the correct chemicals for specific functions within ore concentration.

In conclusion, due to its role in maintaining froth stability, cresol is an essential component in the concentration of sulphide ores, facilitating efficient and effective separation.