Quarry Conveyor Applications
Quarry conveyor systems are mainly used to handle crushed stone, aggregates, and limestone, typically after multiple crushing and screening stages.
Typical on-site situations include:
- Crushed stone with sharp edges causing continuous surface wear rather than heavy impact
- Multiple crushing stages creating frequent transfer points along the conveyor line
- Mixed material flow with coarse aggregates and fine particles combined
- Continuous production requiring stable conveying between crushers, screens, and stockpiles
Key Components in Quarry
Conveyor Idlers
Support the belt when conveying crushed stone and aggregates, where sharp-edged material continuously scrapes the belt surface and increases rolling resistance over time; in multi-stage systems, uneven loading from crushers can also affect rotation stability.
- Sealed idlers are recommended in dust-heavy crushing and screening areas
- Stable rotation reduces additional wear caused by sharp aggregate particles
Conveyor Pulleys
Drive the belt when transporting aggregates between crushers, screens, and stockpiles, where frequent start-stop cycles and varying load levels create tension fluctuation across the system; unstable pulleys can affect material flow consistency between stages.
- Stability is important in multi-stage conveying systems
- Consistent performance supports continuous material flow between processes
Pulley Lagging
Maintains traction when handling fine particles and slightly moist aggregates, where crushed material and dust can accumulate on pulley surfaces and reduce friction; without lagging, this may lead to belt slippage under fluctuating load conditions.
- Recommended in crushing and screening sections
- Useful where fine material buildup is common
Impact Bed
Absorbs impact where crushed stone drops from crushers or screens onto the belt, especially at intermediate transfer points where material flow is uneven; repeated loading can create localized belt stress despite smaller particle size compared to mining.
- Recommended at crusher discharge and transfer points
- Can be omitted in low-drop or fine material sections
Skirting Board
Controls material flow where mixed aggregates and fines spread outward after discharge, especially when material exits crushers or screens with uneven distribution; without skirting, this can lead to continuous side spillage and accumulation along the structure.
- Recommended at frequent transfer points in quarry systems
- Important where fine particles are mixed with aggregates
Belt Cleaners
Remove residual material when handling fine aggregates and dust, which tend to adhere to the belt surface during continuous operation; if not cleaned, carryback leads to material buildup under return idlers and along the conveyor frame.
- Recommended in screening and fine material sections
- Multi-stage cleaning for dust-heavy operations
Selection Notes
- Crushed aggregates (sharp edges) → continuous abrasion becomes the main issue
- Multi-stage systems → transfer points are more frequent than mining
- Mixed material (stone + fines) → spillage and carryback both increase
- High production rate → stability across multiple conveyors is critical