Podcast
Questions and Answers
Which methods are classified under size reduction?
Which methods are classified under size reduction?
A roller mill consists of two cylindrical rollers made of ______.
A roller mill consists of two cylindrical rollers made of ______.
stone
The principle of a cutter mill is based on compression.
The principle of a cutter mill is based on compression.
False
What are the types of knives used in a cutter mill?
What are the types of knives used in a cutter mill?
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Match the following size reduction methods with their description:
Match the following size reduction methods with their description:
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What principle does a mill operate on?
What principle does a mill operate on?
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A hammer mill works primarily on the principle of cutting.
A hammer mill works primarily on the principle of cutting.
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What is the construction of a fluid energy mill?
What is the construction of a fluid energy mill?
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The size reduction in a disintegrator is done by __________.
The size reduction in a disintegrator is done by __________.
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Match the following equipment with their working principles:
Match the following equipment with their working principles:
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Study Notes
Methods of Size Reduction
- Key methods include Cutting, Compression, Impact, Attrition, and Combined impact and attrition.
- Crushing, Grinding, Pulverizing, Filtration, Distillation, Extraction, Chromatography, Heating, Cooling, Evaporating, and Condensing are not recognized as size reduction methods.
Cutting Method
- Cutting method specifically involves the mechanical division of materials into smaller pieces.
Cutter Mill Principles
- Operates on the principle of cutting, utilizing sharp knives for size reduction.
- Focuses on providing efficient slicing action on the material.
Types of Knives in Cutter Mills
- Comprises stationary knives and rotating knives, aiding in the cutting process.
- Straight knives and serrated knives as well as metal and plastic knives are not typically used.
Roller Mill Construction
- Features two cylindrical rollers, traditionally made of stone, ensuring effective grinding or size reduction.
Roller Mill Principles
- Functions on the principle of compression, applying pressure to reduce material size.
- It does not operate based on impact, attrition, or cutting principles.
Hammer Mill Principles
- Works primarily on the principle of impact, utilizing rapid blows to break materials into smaller sizes.
- Does not utilize cutting or compression methods for size reduction.
Disintegrator Principles
- Reduces size using the principle of impact, ensuring efficient breaking of materials.
- Compression, attrition, or cutting are not involved.
Fluid Energy Mill Construction
- Composed of a loop of pipe with an air or inert gas inlet and nozzles for material feed.
- Does not include configurations like rotating blades, drums, or vibrating screens.
Fluid Energy Mill Principles
- Functions on the combined principles of impact and attrition to break down materials effectively.
- Compression and cutting principles are not applicable in this method.
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Description
Test your knowledge on the various methods of size reduction in materials processing. This quiz covers techniques such as cutting, compression, and attrition. Identify the correct methods and deepen your understanding of this critical topic in engineering.
