Project Overview: At a sand-making production line in Meishan, Sichuan, the client faced a severe capacity bottleneck caused by an escalating recirculating load from a traditional impact crusher circuit. By introducing the APEX 1010 Double-Roll Crusher specifically to handle returned oversized grain-sized stones, the plant eliminated material accumulation and converted hard-to-process recirculating stones into high-quality manufactured sand.
โ ๏ธ The Operational Challenge: Impact Crusher Recirculating Bottleneck
Prior to adopting APEX’s solution, the plant relied entirely on an impact crusher paired with a vibrating screen for secondary crushing and sand manufacturing:
- High Recirculating Load: Large quantities of hard-to-crush grain-sized stones passed through the impact crusher without reaching target sizes, continually cycling back to the screen.
- Material Accumulation: Surplus grain-sized stones rapidly piled up on site, exceeding circuit handling limits.
- Restricted Plant Capacity: Re-processing recirculating stones choked the impact crusher, severely capping overall production line throughput.
Figure 1: APEX 1010 double-roll crusher processing returned recirculating stones in Meishan, Sichuan
๐ก The Solution: Dedicated Double-Roll Fine Crushing
To solve the recirculating load crisis, the client integrated an APEX 1010 Hydraulic Double-Roll Crusher directly into the returned-material loop. Operating on high-pressure material-bed compression, the double-roll crusher efficiently reduces stubborn, hard-to-process stones in a single pass.
| Circuit Parameter | Original Impact Crusher Circuit | Retrofitted APEX Double-Roll Circuit |
|---|---|---|
| Handling Returned Stones | Poor single-pass reduction; stones continuously recirculated | High-pressure compression crushes grain stones directly to fine sand |
| Recirculating Load | Kept rising, bottlenecking primary & secondary capacity | Eliminated; material flow operates smoothly without backlogs |
| Finished Product Yield | Low sand yield due to excessive stone accumulation | Surplus grain stones successfully converted into qualified aggregate & sand |
Figure 2: Qualified finished sand produced from previously hard-to-crush recirculating stones
๐ Key Takeaways
- Eliminates Material Piles: Resolves on-site stock accumulation by efficiently cracking tough grain stones down to target specs.
- Unlocks Plant Capacity: Releasing the impact crusher from crushing returned materials boosts total line capacity and lowers overall energy consumption per ton.
- High Cost-Effectiveness: A simple, reliable equipment addition that transforms a operational liability into premium, saleable manufactured sand.
Conclusion: The successful operation of the APEX 1010 double-roll crusher line in Meishan demonstrates how targeted fine-crushing technology can relieve circuit bottlenecks, balance material flow, and maximize profitability for aggregate producers.
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