Section 01
Overview
Aggregate production is the highest-tonnage segment in mining-equipment use globally — and the most unforgiving on machinery. A quarry crushing line typically runs 12–18 hours per day, 6 days a week, with feed material varying from soft limestone to ultra-hard basalt within the same site. Equipment selection mistakes show up not in initial throughput but in wear-part economics over a five-year ownership window.
Cathay equips quarries from 50 t/h single-stage operations producing road-base material to 800 t/h three-stage circuits feeding ready-mix concrete plants. Our reference deployments span Atlas-region limestone quarries, sub-Saharan granite operations, and Middle-Eastern basalt sites — each commissioned by a Cathay engineer with documented start-up acceptance criteria.
The right line is not the one with the highest spec-sheet throughput; it's the one whose surge bins, conveyor widths, and screen apertures match each other across the circuit. We size each component against the actual product specification, not the rated capacity of the slowest machine.
Cathay equips quarries from 50 t/h single-stage operations producing road-base material to 800 t/h three-stage circuits feeding ready-mix concrete plants. Our reference deployments span Atlas-region limestone quarries, sub-Saharan granite operations, and Middle-Eastern basalt sites — each commissioned by a Cathay engineer with documented start-up acceptance criteria.
The right line is not the one with the highest spec-sheet throughput; it's the one whose surge bins, conveyor widths, and screen apertures match each other across the circuit. We size each component against the actual product specification, not the rated capacity of the slowest machine.
Section 02
Operational Challenges
**Feed variance.** Run-of-mine material from blasted quarry faces includes boulders up to 1 metre alongside fines under 50 mm. A jaw crusher sized for the average feed will stall on the boulders; one sized for the boulders will under-utilise on the fines.
**Wear rate.** Manganese-steel jaw plates, cone mantles, and impact-bar liners are consumables. A poorly-tuned closed-side setting can double wear cost per tonne crushed. Cathay equipment ships with documented CSS-vs-throughput curves so the operator can keep wear inside the budgeted band.
**Dust + noise compliance.** Modern quarries operate under environmental permits that limit dust emissions and noise at the property boundary. Our screens ship with dust-extraction hoods, our drive trains use noise-attenuated motors, and our conveyors include skirting at every transfer point.
**Variable downstream demand.** Aggregates customers (asphalt plants, concrete batchers) order in burst patterns. A quarry that cannot absorb a 4-hour weekend production window into surge storage loses revenue. We size the storage cone-stack capacity against your customer-order distribution, not just the production rate.
**Wear rate.** Manganese-steel jaw plates, cone mantles, and impact-bar liners are consumables. A poorly-tuned closed-side setting can double wear cost per tonne crushed. Cathay equipment ships with documented CSS-vs-throughput curves so the operator can keep wear inside the budgeted band.
**Dust + noise compliance.** Modern quarries operate under environmental permits that limit dust emissions and noise at the property boundary. Our screens ship with dust-extraction hoods, our drive trains use noise-attenuated motors, and our conveyors include skirting at every transfer point.
**Variable downstream demand.** Aggregates customers (asphalt plants, concrete batchers) order in burst patterns. A quarry that cannot absorb a 4-hour weekend production window into surge storage loses revenue. We size the storage cone-stack capacity against your customer-order distribution, not just the production rate.
Section 04
Typical Plant Setup
A representative 250 t/h quarry line for road-base aggregate:
1. **Hopper + grizzly feeder** at the quarry face — accepts 1m boulders, bypasses under-50 mm fines around the primary crusher.
2. **Primary jaw crusher (PE-750×1060)** — 200 mm CSS, reduces 1 m feed to 200 mm intermediate stockpile.
3. **Surge bin (200 t capacity)** — decouples primary from secondary so each can run independent shift patterns.
4. **Secondary cone crusher (HPM-200)** — 30 mm CSS, reduces 200 mm to 30 mm.
5. **Triple-deck vibrating screen (3YK-1860)** — splits into 0-5 mm sand, 5-15 mm chip, 15-30 mm road base, plus oversize return to cone.
6. **Belt conveyors (650 mm wide)** — three product belts to dedicated stockpiles, one return conveyor for oversize.
7. **Dust extraction + water spray bars** at every transfer point.
Total connected power: ~280 kW. Footprint: roughly 80×40 m. Commissioning time: 6–8 weeks from site delivery to first commercial product.
1. **Hopper + grizzly feeder** at the quarry face — accepts 1m boulders, bypasses under-50 mm fines around the primary crusher.
2. **Primary jaw crusher (PE-750×1060)** — 200 mm CSS, reduces 1 m feed to 200 mm intermediate stockpile.
3. **Surge bin (200 t capacity)** — decouples primary from secondary so each can run independent shift patterns.
4. **Secondary cone crusher (HPM-200)** — 30 mm CSS, reduces 200 mm to 30 mm.
5. **Triple-deck vibrating screen (3YK-1860)** — splits into 0-5 mm sand, 5-15 mm chip, 15-30 mm road base, plus oversize return to cone.
6. **Belt conveyors (650 mm wide)** — three product belts to dedicated stockpiles, one return conveyor for oversize.
7. **Dust extraction + water spray bars** at every transfer point.
Total connected power: ~280 kW. Footprint: roughly 80×40 m. Commissioning time: 6–8 weeks from site delivery to first commercial product.