Roll Crusher Capacity Calculator

| Added in Engineering

What is Roll Crusher Capacity?

Roll crusher capacity is the maximum amount of material that a roll crusher can process per hour. It is a critical metric for mining and mineral processing operations, as it determines throughput and helps operators plan production schedules. Knowing the capacity helps prevent overloading, which causes equipment damage and downtime.

How to Calculate Roll Crusher Capacity

Here is the formula:

[\text{C} = V \times W \times D \times S \times 60]

Where:

  • C is the roll crusher capacity (tons/hr).
  • V is the peripheral speed of the rolls (m/min).
  • W is the width of the rolls (m).
  • D is the distance between the rolls (m).
  • S is the specific gravity of the material (tons/m³).
  • 60 converts minutes to hours.

Calculation Example

A roll crusher has a peripheral speed of 40 m/min, roll width of 1.5 m, a gap of 2 m, and processes material with a specific gravity of 2.5 tons/m³.

Multiply all values together:

[\text{C} = 40 \times 1.5 \times 2 \times 2.5 \times 60]

[\text{C} = 300 \times 60 = 18{,}000 \text{ tons/hr}]

The theoretical roll crusher capacity is 18,000 tons/hr.

Frequently Asked Questions

Roll crusher capacity is the maximum amount of material a roll crusher can process per hour. It depends on the speed of the rolls, the width and gap of the rolls, and the density of the material being crushed.

The factor of 60 converts the speed from meters per minute to meters per hour. Since capacity is expressed in tons per hour, the speed must be on the same time basis.

Peripheral speed and roll width have the greatest impact on capacity. Increasing either one directly increases throughput. The gap between rolls determines the maximum product size and also affects capacity.

This formula gives the theoretical maximum capacity assuming the gap is completely filled with material. Actual capacity is typically 25 to 50 percent of theoretical due to feed irregularities, material shape, and operating conditions.

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