Selecting the right crushing equipment for copper-gold ore depends mainly on ore hardness, abrasiveness, processing capacity, required product size, and downstream grinding processes.
Copper-gold ore is typically medium-hard to hard (Protodyakonov hardness f=8–14), and gold-bearing minerals often show high toughness. For this reason, crushing plans must balance high crushing efficiency with low over-crushing to prevent gold loss and ensure effective copper recovery.
This article covers a complete, practical method for selecting copper-gold ore crushing equipment.
1. Choose the Right Crushing Process Flow
Three common process flows are used in the industry. Most processing plants adopt three-stage one closed circuit for stable performance.
- Two-stage one closed circuit
Suitable for small plants or soft ores such as oxidized copper-gold ore.
- Three-stage one closed circuit
The most universal configuration; feed size ≤1000 mm, final product ≤15 mm.
Recommended for medium-hard and highly abrasive copper-gold ore.
- Three-stage two closed circuit
Used in ultra-large plants or projects with extremely high fine-crushing requirements.
2. Equipment Selection by Crushing Stage
The table below summarizes feed size, product size, recommended machines, and key selection tips for copper-gold ore projects.
|
Stage |
Feed Size |
Product Size |
Recommended Equipment |
Key Selection Tips |
|
Primary Crushing |
≤1000 mm |
≤300 mm |
Jaw Crusher, Gyratory Crusher |
- Large/medium plants: prefer gyratory crusher for high capacity & low maintenance - Small/medium plants: use jaw crusher for lower investment - Avoid hammer crushers (high over-crushing causes gold loss) |
|
Secondary Crushing |
≤300 mm |
≤60 mm |
Standard Cone Crusher |
- Must use cone crusher for inter-particle (layer) crushing - Spring or single-cylinder hydraulic cones are recommended |
|
Tertiary Crushing |
≤60 mm |
≤12 mm |
Short-head Cone Crusher, HPGR |
- Short-head cone is the mainstream choice - HPGR boosts output & saves energy; improves liberation for low-grade copper-gold ore |
3. Key Factors for Equipment Selection
Ore Properties
- High sulfur or sticky ore: use pre-screening and anti-clogging designs (e.g., double-moving jaw plates).
- Gold in locked/inclusion form: prioritize layer-crushing machines (cone, HPGR) and avoid impact crushers.
- Oxidized copper-gold ore (softer): can use impact crusher with closed-circuit screening.
Capacity Matching
- Under 500 t/d: Jaw Crusher + Fine Jaw Crusher + Short-head Cone Crusher
- 500–2000 t/d: Jaw Crusher + Standard Cone + Short-head Cone (most popular)
- Over 2000 t/d: Gyratory Crusher + Heavy-duty Cone (multiple units) + HPGR
Product Size Control
- Downstream Ball Mill: final product P80 ≤ 12 mm
- Downstream Rod Mill: final product up to 20 mm
- SAG (Semi-Autogenous Grinding) circuit: no strict tertiary crushing required after primary crushing
4. Common Mistakes to Avoid
❌ Do NOT use hammer crushers or impact crushers for tertiary crushing
High over-crushing rate makes gold recovery difficult; wear parts are consumed quickly.
❌ Use cautiously double-roll crushers
Suitable for extremely hard materials but limited capacity and severe roller shell wear.
✅ Highly recommended multi-cylinder hydraulic cone crusher
Excellent fine crushing, automatic iron passing, and good adaptability to sticky copper-bearing ores.
5. Recommended Selection Procedure
- Conduct mineralogical analysis of copper-gold ore (hardness, toughness, clay content, gold occurrence).
- Define target product size to match optimal mill feed and total capacity.
- Select process flow based on plant scale and layout.
- Calculate equipment load factor (recommended 0.7–0.85 for safety margin).
- Compare capital investment and operating costs.
Typical power consumption: cone crusher ~1.0–1.5 kWh/t; HPGR reduces power use by ~30%.
Why Partner with PRS for Your Crushing Line?
PRS specializes in custom crushing and beneficiation solutions for copper and copper-gold ores.
We provide full EPC services including process design, equipment manufacturing, installation, commissioning, and after-sales support.
Whether you need a small-scale modular unit or a large-capacity production line, we deliver configurations that maximize copper recovery, minimize gold loss, and lower your long-term operating cost.
If you have specific data such as daily capacity, ore hardness (Protodyakonov f-value), maximum feed size, or required product granularity, contact PRS for a detailed customized production line plan and official equipment quotation.
