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Size reduction is a process used in various industries to decrease the size of solid materials.
It plays a crucial role in numerous applications, including mineral processing, pharmaceuticals, food production, and chemical manufacturing.
Objectives of Size Reduction
1) Increase Surface Area
Enhancing the rate of chemical reactions.
Improving solubility and mixing efficiency.
2) Improve Handling and Processing
Facilitating transportation and storage.
Enhancing the uniformity of mixtures.
3) Control of Particle Size Distribution
Producing materials with specific characteristics.
Ensuring consistent product quality.
4) Facilitate Separation Processes
Aiding in the separation of valuable minerals from ore.
Improving efficiency in processes like filtration and sedimentation.
Mechanisms of Size Reduction
1) Compression
Applying force to crush material between two surfaces.
Common in jaw crushers and roll crushers.
2) Impact
Applying force rapidly, causing material to fracture.
Used in hammer mills and impact crushers.
3) Attrition
Rubbing action between surfaces, leading to the wearing away of particles.
Common in ball mills and rod mills.
4) Cutting
Shearing action to slice material into smaller pieces.
Used in knife cutters and shredders.
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