The horsepower demand of a roll crusher scales directly with its__________________?
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Answer: C. Both A. & B.
Explanation
Power demand in a roll crusher is directly proportional to both throughput capacity and reduction ratio. Crushing larger feed sizes or achieving finer product sizes increases total mechanical energy consumption. Electrical motor power requirements scale linearly with the physical work done on the mineral feed. Roll crushers utilize heavy rotating cylinders to capture and compress brittle mineral feed materials. Reduction ratio is defined as the ratio of average feed particle size to product particle size. Crushing laws relate energy consumption to new surface area creation and particle volume reduction.
Mineral processing engineers calculate power requirements to select properly sized electric motor drives. Optimizing crusher settings prevents motor overload and equipment stalls during heavy processing runs. Plant operating costs depend significantly on the energy consumed by primary and secondary size reduction. Reduction ratio alone influences power demand, but throughput capacity is equally critical to total energy. Capacity alone determines material flow, but ignoring the reduction ratio underestimates required crushing work. Neither option being correct contradicts established comminution energy scaling laws in processing plants.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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