Question:
What is the principle involved in froth floatation process?
What is the principle involved in froth floatation process?
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Remember: "Sulfide ores go with oil, gangue goes with water."
This simple association is the foundation of the entire froth flotation technique.
This simple association is the foundation of the entire froth flotation technique.
Updated On: Jul 22, 2026
- Ore particles are heavier than gangue
- Gangue particles are adsorbed by pine oil
- Ore particles are preferentially wetted by oil and gangue by water
- Ore particles are preferentially wetted by water and gangue by oil
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Question:
The question is about metallurgy, specifically the froth flotation method used for the concentration of ores.
We need to identify the core physical principle behind this concentration process.
Step 2: Key Formula or Approach:
Froth flotation is used to separate mineral particles from gangue based on differences in their wetting characteristics with water and oils.
Step 3: Detailed Explanation:
• The froth flotation process is primarily used for the concentration of sulfide ores (e.g., Galena PbS, Copper pyrites $\text{CuFeS}_2$, Zinc blende ZnS).
• The pulverized ore is mixed with water and a small amount of collectors (like pine oil or xanthates) and frothers.
• The sulfide ore particles have hydrophobic surfaces and are preferentially wetted by oil (pine oil), making them attach to air bubbles. These rise to the surface as froth.
• The gangue (earthy impurities) particles are hydrophilic and are preferentially wetted by water, causing them to sink to the bottom of the tank.
• This difference in wetting behavior allows the ore to be separated from the impurities.
Step 4: Final Answer:
The principle of the froth flotation process is that ore particles are preferentially wetted by oil and gangue particles are preferentially wetted by water.
The question is about metallurgy, specifically the froth flotation method used for the concentration of ores.
We need to identify the core physical principle behind this concentration process.
Step 2: Key Formula or Approach:
Froth flotation is used to separate mineral particles from gangue based on differences in their wetting characteristics with water and oils.
Step 3: Detailed Explanation:
• The froth flotation process is primarily used for the concentration of sulfide ores (e.g., Galena PbS, Copper pyrites $\text{CuFeS}_2$, Zinc blende ZnS).
• The pulverized ore is mixed with water and a small amount of collectors (like pine oil or xanthates) and frothers.
• The sulfide ore particles have hydrophobic surfaces and are preferentially wetted by oil (pine oil), making them attach to air bubbles. These rise to the surface as froth.
• The gangue (earthy impurities) particles are hydrophilic and are preferentially wetted by water, causing them to sink to the bottom of the tank.
• This difference in wetting behavior allows the ore to be separated from the impurities.
Step 4: Final Answer:
The principle of the froth flotation process is that ore particles are preferentially wetted by oil and gangue particles are preferentially wetted by water.
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