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Question

In the concentration of cassiterite (SnO$_2$), which method is employed to remove lighter gangue particles like clay and sand?

Mr. S M HUSSAIN · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
 **Primary Concept**: Mineral processing and separation techniques
 **Related Topics**: Gravity separation, froth flotation, magnetic separation, leaching
 **Prerequisites**: Understanding of different ore dressing methods and their applications.
## SOLUTION PATHWAY
**Given Information**:
  Cassiterite ($SnO_2$) concentration needs to remove lighter gangue (clay and sand).
  Options: Gravity separation, froth flotation, magnetic separation, leaching.
**Method & Steps**:
 1. Analyze each separation method's suitability for removing lighter gangue from cassiterite.
  Reasoning: We need a method that utilizes density differences to separate the heavier cassiterite from the lighter gangue.
  Formula/Rule: None directly applicable, this is a qualitative analysis based on the principles of each method.
 2. Evaluate the effectiveness of each option.
  Working: 
		* Gravity separation utilizes density differences.  Since cassiterite is denser than clay and sand, gravity separation is effective.
		* Froth flotation is based on surface properties and is more suitable for separating hydrophobic minerals.
		* Magnetic separation relies on magnetic properties and is not relevant here as neither cassiterite nor the gangue are significantly magnetic.
		* Leaching involves dissolving a specific component using a chemical solvent; it's not suitable for removing inert gangue.
 3. Select the most appropriate method.
  Result: Gravity separation is the most suitable method for removing lighter gangue (clay and sand) from cassiterite.
  Verification: Gravity separation is a common and effective technique used in the concentration of heavy minerals like cassiterite.
 ## OPTION ANALYSIS
A ✓: Gravity Separation: This method effectively separates materials based on density differences. Cassiterite is denser than clay and sand, making gravity separation an appropriate choice for removing these lighter gangue particles.
B :x: Froth Flotation: This technique is used to separate minerals based on their hydrophobicity (water-repelling properties). It's not ideal for removing lighter gangue particles from cassiterite.
C :x: Magnetic Separation: This method exploits the magnetic properties of minerals.  Neither cassiterite nor the common gangue materials (clay and sand) are significantly magnetic, rendering this method ineffective.
D :x: Leaching: This involves dissolving a specific component using a chemical solvent.  It's not suitable for removing inert gangue materials like clay and sand.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing gravity separation with froth flotation: Remember that gravity separation uses density differences, while froth flotation uses surface properties.
  2.Assuming magnetic separation is applicable to all minerals: Magnetic separation only works for minerals with significant magnetic properties.
 **Quick Tips**:
  1.For separating minerals based on density differences, consider gravity separation first.
  2.Remember the basic principles of each separation technique to choose the most appropriate method.

Mr. S M HUSSAIN · Answer

The correct Option is "Gravity Separation"

Mr. S M HUSSAIN · Answer

Froth Flotation

Mr. S M HUSSAIN · Answer

Magnetic Separation

Mr. S M HUSSAIN · Answer

Leaching

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