For hard rock gold mining projects, proper crushing and grinding are the foundation of high gold recovery. Many small mine owners rush to buy concentrators or shaking tables only to find poor gold liberation, leading to low concentrate grade and heavy gold loss. This jaw crusher + ball mill closed-circuit grinding package is the standard pre-treatment unit for free-milling quartz gold ore, compatible with gravity separation, CIL and heap leaching downstream processes.
What Is Included In This Package
This standard set is widely matched for 3–10TPH small hard rock gold circuits, paired with spiral classifier to form closed-circuit wet grinding:
| Equipment | Model | Core Task |
|---|---|---|
| Jaw Crusher | PE200×300 | Primary crushing big rock ore into 15–40mm feed |
| Ball Mill | 0930 Ball Mill | Wet grinding, dissociate gold grains from quartz gangue |
| Spiral Classifier | FG075 Spiral Classifier | Classify slurry; return coarse sand back to ball mill for re-grinding |
| Supporting Parts | Pumps, Pipes, Motors, Base Frame | Full installation set, ready for site assembly |
Full Working Principle
- Large run-of-mine hard rock gold ore enters the jaw crusher for primary crushing. The compressive force of jaw plates breaks rock down to suitable particle size for milling.
- Crushed ore is fed into the ball mill together with water for wet grinding. Steel balls inside continuously impact and grind ore to release fine native gold locked in quartz rock.
- Slurry flows into the spiral classifier. Fine qualified overflow slurry moves forward to downstream separation; coarse unground sand is lifted by spiral blades and sent back to the ball mill for re-grinding.
- Closed-circuit grinding keeps stable fineness, avoids over-grinding sliming gold and prevents under-grinding which causes gold still locked inside rock particles.
Key Benefits For Small Hard Rock Gold Mines
- Universal Front-End Module — Works seamlessly with centrifugal concentrator, shaking table, CIL leaching tank or other gold recovery equipment. Flexible process upgrade later.
- Stable Closed-Circuit Grinding Control — Consistent grinding fineness is the most critical factor for predictable gold recovery.
- Adaptable For Off-Grid Mining Sites — Matches diesel generator power supply, suitable for remote mines without grid electricity.
- Low Maintenance & Easy Operation — Simple structure, easy replacement of jaw plates and liners, few skilled workers required.
- Cost-Effective Investment — Standard modular design, shorter delivery cycle compared with custom large crushing circuits.
Common Downstream Process Options
After the jaw crusher + ball mill grinding package, you can choose your gold recovery route based on ore properties and local regulations:
- Gravity route: Centrifugal concentrator + 6S shaking table (No chemical, eco-friendly)
- CIL route: CIL carbon-in-leach tank system (High recovery for free gold ore)
- Combined route: Gravity concentration first, then leach tailings to maximize total gold yield
FAQ
Q1: Can this crushing & grinding package handle other ores besides gold?
A: Yes, it also works for tin, tungsten, chrome, tantalum-niobium and other hard rock heavy mineral ores for gravity separation.
Q2: What grinding fineness can this circuit reach?
A: Normally 80–200 mesh adjustable, we set target fineness according to your ore test report and gold grain size.
Q3: Do I need to add secondary cone crusher after jaw crusher?
A: For 3–10TPH small hard rock gold plant, PE200×300 jaw crusher feeding directly into ball mill is acceptable. If raw rock is extra large, we recommend secondary crushing.
Q4: Can you supply the whole turnkey plant including gravity concentration equipment?
A: Absolutely. We can combine this crushing-grinding package with centrifugal concentrator and shaking table to deliver the complete gravity gold processing line.
Final Reminder
Many small miners overlook crushing and grinding. Even the best concentrator cannot recover gold if gold grains are still locked inside rock. Start with a reliable jaw crusher and ball mill closed-circuit set to lay a solid foundation for your gold beneficiation project. Mineral testing before ordering is strongly recommended.
Share your ore sample test result and site power condition, we provide customized layout, equipment quotation and generator matching solution.
