1. PAINPOINT DRIVEN OPENING

Are you facing persistent challenges in your hard rock gold processing operation? The limitations of traditional crushing and grinding methods directly impact your bottom line. Consider these common operational hurdles:

High Operational Costs: Excessive energy consumption from inefficient grinding and frequent, costly maintenance of mechanical components.
Unplanned Downtime: Premature wear and failure of stamp shoes, dies, and cams lead to inconsistent throughput and lost production hours.
Complex Tailings Management: Inefficient liberation of gold from quartz can result in highergrade material reporting to tailings, representing a direct revenue loss.
Scalability Issues: Difficulty in costeffectively scaling operations to process mediumgrade ore without a massive capital investment in modern, hightonnage milling circuits.
Skill Gap & Operational Complexity: Modern milling systems require specialized technicians, while simpler methods lack the necessary recovery efficiency for complex ores.

Is there a reliable, robust solution that balances proven effectiveness with operational simplicity for specific ore types? For many operations, the answer lies in a reengineered approach to a classic technology.

2. PRODUCT OVERVIEW: HEAVYDUTY MODERN STAMP MILLS FOR GOLD ORE PROCESSING

Our engineered stamp mill solutions are not historical replicas but modernized gravityimpact crushing and grinding machinery designed for specific commercial mining applications. They are engineered for operations processing freemilling gold ores locked in quartz or other competent host rock where cyanidation follows crushing.

Operational Workflow:
1. Primary Feed: Sized ore (typically 2" to 1") is fed into a mortar box.
2. Gravity Impact Crushing: Mechanically lifted heavy stamps (7502000 lbs each) are dropped in sequence onto the ore bed within the mortar box.
3. Continuous Grinding & Amalgamation: A controlled flow of water carries the progressively finer material across an amalgamation plate (if configured) and out of the mortar box as a slurry.
4. Concentration: The slurry is routed to downstream concentration systems like shaking tables or sluices to recover the liberated gold.

Application Scope & Limitations:
Best For: Small to mediumscale operations, pilot plants, toll milling facilities, and regions with limited access to complex technology or grid power. Highly effective on brittle, freemilling ores.
Limitations: Not suitable for hightonnage operations (>200 TPD), refractory ores requiring fine grinding (<100 mesh), or highly abrasive materials without specific alloy modifications. Requires consistent ore feed sizing.

3. CORE FEATURES

Modular Frame Design | Technical Basis: Bolted highcarbon steel construction with vibrationdampening isolators | Operational Benefit: Simplified transport, assembly onsite, and reduced foundation stress leading to longterm structural integrity | ROI Impact: Lowers installation costs by up to 30% and extends operational lifespan

Forged Alloy Stamp Shoes & Dies | Technical Basis: Airhardened manganese or chromium alloy steel for optimal impact resistance and wear life | Operational Benefit: Significantly reduced frequency of component changeouts, maintaining consistent crush weight and grind efficiency | ROI Impact: Cuts consumable costs by 4060% compared to standard carbon steel components

Precision Camshaft & Lifter Design | Technical Basis: Computermodeled lift profiles and inductionhardened bearing surfaces | Operational Benefit: Smooth, efficient transfer of power, reduced shock loads on drive systems, and synchronized stamp drops for even feed processing | ROI Impact: Improves energy efficiency by ~15% and reduces drive motor maintenance intervals

Configurable Amalgamation Section | Technical Basis: Interchangeable copper plate mercury retort system with dedicated rinse channels | Operational Benefit: Provides optional, contained precious metal recovery at the primary grind stage for highgrade pockets | ROI Impact: Can increase overall recovery by 510% on appropriate ores before secondary concentration

Automated Lubrication System | Technical Basis: Centralized grease manifold with timed dispensers for all major bearings and wear points | Operational Benefit: Eliminates manual lubrication errors, ensures optimal bearing life, and enhances operational safety | ROI Impact: Prevents costly bearing failures, reducing unplanned downtime related to lubrication issues

Variable Discharge Grate System | Technical Basis: Adjustable slot grates at the mortar box discharge allow control over slurry density and particle size | Operational Benefit: Operators can finetune grind fineness based on realtime ore characteristics and downstream recovery requirements | ROI Impact: Optimizes performance across varying ore batches, maximizing overall plant recovery rates

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Stamp Mill) | Modern Engineered Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Wear Part Life (Stamp Shoes)| 80 120 Operating Hours | 250 400 Operating Hours| +200% to +230% |
| Energy Efficiency (kWh/Ton)| Estimated 8 10 kWh/Ton| Estimated 6.8 8.5 kWh/Ton| ~15% Improvement |
| Mean Time Between Failure (Drive)| ~1,500 Hours (est.)| >3,000 Hours (design target)| +100% |
| Tonnage Throughput Consistency| +/ 20% variance due to wear|/+ 5% variance through wear cycle| +75% Consistency |
| OnSite Assembly Time| Extensive field welding/fitting| Bolted modular assembly| ~50% Reduction |

_Note: Energy consumption is highly oredependent; figures are for comparative illustration on similar quartz gold ore._

5. TECHNICAL SPECIFICATIONS

Model Range & Capacity: Available in 3Stamp (0.51 TPH), 5Stamp (12 TPH), and 10Stamp (24 TPH) modular units. Custom configurations available.
Power Requirements: Electric motor driven; primary drive motor from 15 HP (3Stamp) to 60 HP (10Stamp). Diesel power options available.
Material Specifications: Highcarbon steel frame; AISI 4140 alloy shafts; MnSteel or HiChrome iron wear shoes/dies; bronze sleeve bearings at highwear points.
Physical Dimensions (10Stamp Unit): Approx. L6m x W2m x H3m (assembled). Designed for containerized shipping.
Environmental Operating Range: Designed for operation from 20°C to +50°C ambient temperature with standard lubricants and seals. Dust suppression kit recommended for arid environments.

6. APPLICATION SCENARIOS

Pilot Plant & Bulk Sampling Operation | Challenge: A junior mining company needed reliable data on metallurgical recovery from multiple zones of a quartz vein deposit without the capital cost of a full milling circuit. Small batch processing with consistency was critical.| Solution: Installation of a single modular 5stamp mill unit fed by a small jaw crusher. The unit processed >500 ton bulk samples from different zones.| Results: Provided consistent grind size for cyanidation testing across all samples, generating bankable recovery data with <5% variance between runs. The capital cost was 60% lower than a comparable ball mill circuit for this scale.

Artisanal & SmallScale Mining (ASM) Cooperative Upgrade | Challenge: A cooperative was using manual crushing and inefficient grinding methods, losing an estimated 3040% of fine gold to tailings while facing high labor costs.| Solution: Implementation of two centralized 10stamp mill factories with integrated shaking tables, replacing dispersed manual operations.| Results: Gold recovery rates improved from ~60% to >85%. Throughput increased by 300%, allowing profitable processing of lowergrade ore stockpiles. Safety and environmental management were significantly enhanced.

7. COMMERCIAL CONSIDERATIONS

Our stamp mill solutions are offered under clear commercial terms designed for business investment:

Pricing Tiers: Pricing is modeldriven based on stamp count/throughput capacity:
Tier I (35 Stamp): Entrylevel pricing for pilot plants or very small operations.
Tier II (1015 Stamp): Our most popular range for dedicated smallscale factories.
Tier III (Custom MultiUnit): Configured multimill installations with shared infrastructure.

Optional Features / Packages:

Base Equipment Package includes mill frame/mechanism/motor
Premium Wear Package upgrades all wear parts to premium alloys
Integrated Recovery Package adds amalgamation plates/mercury retort
Full Plant Package includes primary crusher feed systemand secondary concentration tables

Service Packages:

1Year Warranty & Commissioning Support
3Year Extended Service Agreement covering scheduled maintenance inspections
OnDemand Technical Support & Remote Diagnostics

Financing Options:

We work with international equipment financing partners familiar with mining projects offering leasetoown structures operating loan tieins typical terms range from months months depending on credit profile

FAQ:

What is the typical feed size requirement?

Optimal feed is minus inches minus mm Consistent feed size from primary jaw crusher essential prevent packing ensure efficient operation Larger feed reduces throughput increases component stress

Can this integrate into existing cyanidation CIP/CIL plant?

Yes modern stamp mills function as primary grinder producing slurry ideal agglomeration leaching tanks They often paired shaking table concentrator handle higher grade material first For existing plants serve rugged pre grinder ahead finer ball milling reducing load downstream circuit

What ongoing maintenance required?

Daily visual inspection lubrication Weekly checking bolt tightness shoe die wear Monthly comprehensive bearing cam inspection Wear part replacement schedule depends tonnage processed ore abrasiveness but typically shoes replaced every operating hours under normal conditions

Are spare parts readily available?

Yes we maintain strategic inventory key wear components drive parts Standardized designs ensure common parts across model tiers reducing inventory complexity customers Expedited shipping available critical breakdown situations

What training provided operators?

We provide comprehensive digital operation maintenance manuals onsite commissioning training days included purchase This covers safe operation routine adjustment troubleshooting basic procedures Training focused maximizing component life optimizing grind settings