1. PAINPOINT DRIVEN OPENING

Are you managing gold recovery operations burdened by inconsistent throughput, excessive downtime for maintenance, and rising operational costs? Manual crushing and inefficient grinding directly impact your bottom line through lost production hours and suboptimal mineral liberation. Consider these common challenges:
High Operational Downtime: Frequent breakdowns of undersized or poorly constructed equipment halt entire processing lines.
Inefficient Gold Liberation: Inconsistent particle size from primary crushing leads to poor amalgamation or leaching recovery rates.
Excessive Maintenance Costs: Constant wear part replacement and unplanned repairs create unpredictable OPEX.
Scalability Limitations: Equipment cannot efficiently handle increased ore feed from expanded mining operations.
Labor Intensity & Safety Concerns: Reliance on manual processes for feeding and monitoring increases risk and labor costs.

The central question for plant managers is this: how can you achieve reliable, highvolume ore reduction with predictable maintenance schedules and optimized gold recovery? The industrialgrade stamp mill provides a proven, mechanical solution.

2. PRODUCT OVERVIEW

An industrial stamp mill for gold mining is a heavyduty mechanical crusher designed for the repetitive, highimpact crushing of goldbearing quartz rock. It operates on the camandlever principle to pulverize ore into fine sand, liberating gold particles for subsequent recovery processes like amalgamation or cyanidation.

Operational Workflow:
1. Feed: Runofmine (ROM) or primarily crushed ore is fed into a sturdy mortar box.
2. Crushing: A series of mechanically lifted heavy stamps (shoes) are dropped onto the ore via a rotating camshaft.
3. Pulverization: The continuous impact reduces the ore to a fine slurry or sand consistency.
4. Wash & Extraction: Water introduced into the mortar box washes the crushed material over an amalgamated copper plate or onto tables for concentration.

Application Scope & Limitations:
Scope: Ideal for hard rock (lode) gold mining operations processing quartz veins and sulphide ores. Highly effective as a primary or secondary crusher in small to mediumscale operations, remote sites, or as a backup system.
Limitations: Not suitable for soft, clayrich material without modification. Requires a consistent water source for optimal operation. Generally has a higher energyperton footprint than modern ball mills for very largescale, continuous operations.

3. CORE FEATURES

HeavyDuty Cast Iron Mortar Box | Technical Basis: Singlepiece highgrade cast iron construction | Operational Benefit: Eliminates leakage points and withstands continuous highimpact stress without fatigue cracking | ROI Impact: Reduces foundation repair costs and prevents costly slurry loss, extending service life by decades.

Modular Stamp Assembly | Technical Basis: Individually mounted stamps with replaceable shoes and stems | Operational Benefit: Allows for singlestamp maintenance without shutting down the entire mill bank | ROI Impact: Minimizes downtime by up to 80% for wear part changes compared to integrated systems.

Precision Machined Camshaft | Technical Basis: Forged steel shaft with hardened alloy steel cams, machined to precise lift profiles | Operational Benefit: Ensures uniform lift and drop timing across all stamps for consistent particle size distribution | ROI Impact: Improves gold recovery yield through optimized liberation and reduces energy waste from irregular operation.

Automated Ore Feed Regulator | Technical Basis: Mechanically interlinked gate system synchronized with camshaft rotation | Operational Benefit: Maintains optimal feed rate to prevent overloading or running dry, protecting the mortar bed | ROI Impact: Stabilizes throughput, reduces operator oversight needs, and prevents damage from empty running.

Integrated Amalgamation Plate System | Technical Basis: Strategically angled copper plate trays coated with mercury, installed in the slurry discharge path | Operational Benefit: Captures freemilling gold particles immediately upon liberation during the wash process | ROI Impact: Increases overall recovery efficiency at the primary crushing stage, capturing value upfront.

Centralized Grease Lubrication System | Technical Basis: Networked lubrication lines feeding all major bearing points from a single station | Operational Benefit: Enables safe, routine maintenance without disassembly, ensuring bearing longevity | ROI Impact: Lowers labor time for lubrication by over 50% and prevents premature bearing failure.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Basic Mills) | Our Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Mean Time Between Failure (MTBF) Stamps | 200300 operating hours | 450+ operating hours | +125% longer service life |
| Throughput Consistency (Tons/Hour) +/ 15% variance due to feed issues +/ 5% variance with automated feed regulator| +66% more consistent output |
| Maintenance Downtime per Stamp Change| 46 hours per stamp (full bank shutdown)| <1 hour per stamp (individual isolation)| 80% reduction in downtime |
| Gold Recovery Efficiency at Crusher Stage| Estimated 6070% of freemilling gold captured| Field data shows 8592% captured via optimized plate system| +25% improved initial capture |

5. TECHNICAL SPECIFICATIONS

Capacity & Rating: Available in 750kg/hr (1stamp), 2 Ton/hr (5stamp), and 5 Ton/hr (10stamp) models based on quartz ore of medium hardness.
Power Requirements: Diesel engine (25HP 100HP) or electric motor drive (18kW 75kW) options available. Complete with heavyduty reduction gearbox.
Material Specifications: Mortar Box & Frame: ASTM A48 Class 40 Cast Iron; Stamps: Forged Steel Stems with Manganese Steel Shoes; Camshaft: EN24 Forged Steel, casehardened; Wear Liners: Replaceable AR400 Steel.
Physical Dimensions (5Stamp Mill): Operating Footprint approx. 3m L x 2m W x 2.5m H; Dry Weight approx. 8,500 kg.
Environmental Operating Range: Designed for operation in ambient temperatures from 10°C to +45°C. All critical bearings are sealed against dust and moisture ingress.

6. APPLICATION SCENARIOS

MidScale Hard Rock Mine Expansion

Challenge A growing operation in West Africa needed to double its primary crushing capacity but faced unreliable power grids that made fully electric solutions risky.
Solution Implementation of two dieselpowered industrial stamp mills operating in parallel as primary crushers before their existing ball mill circuit.
Results Achieved consistent daily throughput independent of grid fluctuations. The robust mechanical design reduced unexpected breakdowns by over 60%, meeting expansion targets within budget.

Artisanal & SmallScale Mining (ASM) Cooperative Upgrade

Challenge A South American cooperative using manual hammers was experiencing low recovery rates (<40%) and high physical strain on workers.
Solution Deployment of a single compact electric stamp mill with an integrated amalgamation plate system centralizing their crushing process.
Results Throughput increased tenfold while gold recovery efficiency rose to an average of 87%. The cooperative reported payback on equipment within five months of operation based on increased yield alone.

7. COMMERCIAL CONSIDERATIONS

Equipment pricing is tiered based on capacity and configuration:
Tier I – Standard Duty Mill Package includes core mill unit with drive motor/engine starter kit
Tier II – Enhanced Recovery Package adds integrated amalgamation plates advanced feed regulator
Tier III – Turnkey Plant Package includes mill settling tanks water recirculation system installation supervision

Optional features include dust suppression covers remote monitoring sensors custom wear part alloys

Service packages are available:
1 Basic Warranty covering parts defects
2 Annual Maintenance Contract providing scheduled inspections wear part discounts
3 Full Site Support including technician dispatch priority parts shipping

Financing options can be discussed including leasetoown structures tailored capital expenditure plans suitable commercial loans through partner institutions

8.FAQ

What is the typical particle size output from your stamp mills?
The mills are engineered to produce a sandlike product where approximately >90 passes through mesh facilitating efficient gold liberation downstream processes

Can your stamp mills be integrated into an existing CIP/CIL plant circuit?
Yes they function effectively as reliable primary secondary crushers ahead fine grinding circuits ensuring consistent feed size ball mills improving overall plant stability

How do you address environmental concerns regarding mercury use amalgamation plates?
We provide fully contained retort systems safe handling procedures training optional configurations direct discharge concentration tables leaching compatible setups

What is lead time delivery standard model?
Standard models typically ship within weeks confirmed order Custom configurations may require weeks lead time detailed shipping logistics provided upon inquiry

Do you offer spare parts technical support globally?
We maintain global distributor network comprehensive spare parts inventory technical documentation available digital format onsite training can arranged