Project Overview: 300 t/d Placer Gold Crushing Line at an Overseas Mining Site

How the 2PGY1200×1000 Hydraulic Roll Crusher Precisely Controls Over‑Crushing and Significantly Boosts Gravity Separation Recovery

1. Client Challenge & Production Bottlenecks

An overseas placer gold processing plant operates at a significant daily capacity. The raw ore contains fine-grained gold along with large amounts of clay and gravel. The crushing section originally used a two-stage open circuit with a jaw crusher and an impact crusher. High-speed impact created serious production bottlenecks:

Severe Loss of Fine Gold: High-speed impact shattered the gold-bearing minerals into excessive fines. Micro-fine gold particles could not be effectively recovered by gravity separation and were lost to tailings, wasting valuable resources.

Frequent Clogging from Clay: The clay associated with placer gold easily adhered to the crushing chamber walls and screen plates, causing frequent blockages. The line had to be stopped for cleaning frequently, with operating efficiency falling far below rated capacity.

placer gold crusher

Low Gold Recovery: Uneven feed size and excessive slime content drastically reduced the concentration ratio of jigs and shaking tables. Overall recovery was well below acceptable levels, with large amounts of gold lost to tailings.

2. Upgrade Solution

After understanding the client’s needs and site conditions, the Huashengming team developed a tailored solution and redesigned the crushing-screening-gravity separation process. The core solution was to replace the impact crusher with the 2PGY1200×1000 Heavy-Duty Hydraulic Roll Crusher as the key fine-crushing equipment.

This machine uses counter‑rotating rollers and hydraulic extrusion crushing, replacing high‑speed impact with low‑speed, high‑pressure static compression. The discharge size is precisely controlled to 0‑8mm via the hydraulic system, with nitrogen accumulators providing real‑time pressure compensation to maintain stable output even when feed fluctuates.

3. Plant Manager’s Feedback

“Previously, our biggest headaches were slime‑related gold loss and frequent clogging. The impact crusher produced too many fines, and the jigs simply couldn’t recover them – we watched the gold slip away with the tailings. After switching to the Huashengming hydraulic roll crusher, the output is uniform, fines are minimal, and gravity recovery has improved significantly. The machine runs continuously without constant cleaning stops, and our operators are much more satisfied.”

4. Why Choose Huashengming Roll Crusher for Placer Gold?

Extrusion Crushing – Extremely Low Over‑Crushing

The two rollers rotate in opposite directions, applying uniform static pressure in the roll gap – not high‑speed impact. This gentle crushing action dramatically reduces slime generation, effectively preserves the original particle shape of the gold particles, and creates ideal conditions for gravity separation.

Screen‑Less Design – Completely Eliminates Clogging

With no grate bars or screens, wet and clay‑laden material passes through smoothly without sticking or blocking. Production lines are freed from frequent stoppages for cleaning, achieving continuous and stable operation.

Precise and Adjustable Discharge Size

The hydraulic system allows precise adjustment of the roll gap, with discharge size flexibly set between 0‑10mm to meet the requirements of various gravity separation equipment.

Placer gold crusher – workshop live shot

Wear‑Resistant Roller Shells – Extended Service Life

The roller shells are made of high‑hardness wear‑resistant alloy, with options for hardfacing or embedding tungsten carbide studs. When worn, the roller surface can be repaired online by hardfacing without replacing the entire shell, significantly reducing maintenance costs.

Hydraulic Overload Protection – Safe and Reliable

When encountering uncrushable objects, the hydraulic system automatically widens the roll gap to allow foreign material to pass, then quickly resets – effectively protecting the core components.

5. Conclusion

Placer gold has high value, but over‑crushing caused by traditional crushing methods leads to significant gold loss for many processing plants. Huashengming roll crusher, centered on the “more crushing, less grinding” philosophy, helps customers retain more gold in the concentrate through precise particle size control and ultra‑low over‑crushing.

Stop letting slime‑related gold loss and frequent clogging eat into your profitability. Contact Huashengming today for a custom equipment recommendation and factory‑direct pricing → https://www.hsmmachinery.com/contact-us