Question:
The size reduction mill where the grains are rubbed between the grooved flat faces of rotating circular disks is:
The size reduction mill where the grains are rubbed between the grooved flat faces of rotating circular disks is:
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Attrition = Rubbing. Disc mills are the classic examples of attrition.
Updated On: May 5, 2026
- Colloid mill
- Ball mill
- Hammer mill
- Attrition mill
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The Correct Option is D
Solution and Explanation
Step 1: Concept Size reduction involves different mechanical forces: impact, compression, shearing, or attrition.
Step 2: Meaning "Rubbing" or "grinding" between two surfaces is the definition of attrition.
Step 3: Analysis An attrition mill (also known as a burr mill or disc mill) consists of two circular discs (one or both rotating) with grooved surfaces. Material is reduced in size as it is rubbed between these faces.
Step 4: Conclusion This description defines the attrition mill.
Final Answer: (D)
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