Crusher sizing: compared at the same gape, handling the same feed and product size range, the capacity of a gyratory crusher is approximately how much relative to a jaw crusher?

Introduction / Context:
Primary crushers include jaw and gyratory types. For comparable gape (largest feed opening dimension), their throughput capacities differ due to differences in continuous vs. intermittent crushing action and chamber geometry.

Given Data / Assumptions:

• Same gape and similar feed and product size specifications.
• Normal operating conditions.

Concept / Approach:
The gyratory crusher provides continuous crushing over the whole of the receiving opening as the mantle gyrates within the concave. A jaw crusher crushes intermittently as the jaw closes and opens. Consequently, for the same gape, gyratories achieve higher capacity—commonly about 2.5 times—under comparable conditions.

Step-by-Step Solution:
Compare mechanisms: continuous (gyratory) vs. cyclic (jaw).Throughput scales with active crushing zone/time.Rule-of-thumb capacity ratio ≈ 2.5 → select "2.5 times."

Verification / Alternative check:
Design charts and handbooks provide capacity curves indicating gyratories outpace jaws for the same gape by roughly 2–3×, with 2.5× a typical quoted value.

Why Other Options Are Wrong:
Same as: ignores continuous action advantage.5× or 10×: overstated for same gape and duty.

Common Pitfalls:
Comparing specific models without normalizing gape and product size; capacities also depend on bulk density, moisture, and nip angle.

Final Answer:
2.5 times