1. PAINPOINT DRIVEN OPENING

Are you facing escalating costs and operational bottlenecks in your primary gold ore processing? Manual crushing is laborintensive and inconsistent, while modern highthroughput mills demand excessive capital and complex infrastructure, particularly for remote or smallerscale operations. These challenges directly impact your bottom line through high energy consumption per ton, significant downtime for maintenance, and suboptimal gold recovery from complex ores.

What if you could implement a robust, proven comminution solution that balances throughput with operational simplicity? How would reducing overgrinding and improving consistent particle size distribution affect your overall recovery rates? The industrytested stamp mill for gold mining remains a strategically viable solution for specific project profiles, addressing these enduring pain points with mechanical reliability and straightforward operation.

2. PRODUCT OVERVIEW

A stamp mill is a gravitydriven, mechanical crushing device designed to liberate gold from quartz and other host rocks through repeated pounding. Its core function is primary and secondary crushing of ore to a sandlike consistency suitable for subsequent gravity separation processes like sluicing or amalgamation.

Operational Workflow:
1. Feed: Raw ore is fed into a mortar box, typically from an overhead ore bin.
2. Crushing: Mechanically lifted heavy stamps (wooden or metal rods fitted with iron shoes) are released to drop onto the ore.
3. Pulverization: Repeated impact from multiple stamps reduces the ore within the mortar box.
4. WashThrough: A continuous flow of water washes the finely crushed material through a perforated screen at the front of the mortar box.
5. Collection: The slurry exits onto sluices or amalgamation plates where free gold is recovered.

Application Scope & Limitations:
Ideal For: Small to mediumscale mining operations, pilot plants, historical site reprocessing, and regions with limited access to consistent highpower electricity or complex technical support.
Limitations: Not suitable for very hightonnage operations (>150 TPD typically). Efficiency decreases with clayrich or highly abrasive ores without preprocessing. Requires a consistent water supply.

3. CORE FEATURES

Modular Stamp Battery Design | Technical Basis: Independent camshaft & stamp assemblies | Operational Benefit: Allows individual stamps to be taken offline for shoe replacement without halting the entire mill | ROI Impact: Reduces planned maintenance downtime by up to 30%, maintaining throughput during service.

HeavyDuty Cast Iron Mortar Box | Technical Basis: Highmass, singlecast construction with reinforced wear surfaces | Operational Benefit: Absorbs immense repetitive impact stress, minimizes vibrationinduced fatigue cracks | ROI Impact: Extends service life by years compared to fabricated boxes, lowering lifetime capital expenditure.

Adjustable Screen & WashWater System | Technical Basis: Manifoldcontrolled water flow and replaceable screen plates | Operational Benefit: Operators can control pulp density and particle size discharge in realtime to optimize recovery on downstream sluices | ROI Impact: Field data shows a 515% improvement in gravity recovery efficiency through optimized particle liberation.

Centralized Grease Lubrication System | Technical Basis: Networked lubrication lines to all major bearings and camshaft points | Operational Benefit: Enables safe lubrication during operation, ensuring bearing longevity in dusty environments | ROI Impact: Prevents catastrophic bearing failure, reducing unscheduled downtime and associated repair costs.

Simplified Mechanical Drive Train | Technical Basis: Direct lineshaft drive or beltdriven from a single prime mover (diesel or electric) | Operational Benefit: Ease of maintenance; local mechanics can diagnose and repair standard components | ROI Impact: Lowers longterm operational dependency on specialized technicians and reduces spare parts inventory complexity.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Small Jaw Crusher & Hammer Mill Combo) | Stamp Mill Gold Mining Solution | Advantage (% Improvement) |
| : | : | : | : |
| Energy Consumption per Ton (Hard Rock) | ~3.5 4.5 kWh/t | ~2.8 3.5 kWh/t (mechanical efficiency) | 2022% Reduction |
| Mean Time Between Failure (Major Components) | ~1,200 1,500 hours | ~2,000+ hours (proven design) | +33% Reliability |
| Footprint per 50 TPD Capacity| Moderate (requires multiple units) | Compact (vertical integration) | ~25% Smaller Area |
| Operator Skill Requirement| MediumHigh (multiple processes)| LowMedium (single process focus)| Reduced Training Burden |
| Tolerance for Oversize Feed| Low (requires grizzly/prescreening)| High (direct feed capable)| Reduced PreCrushing Need |

5. TECHNICAL SPECIFICATIONS

Model Range Capacity: 10 150 Tons Per Day (TPD), depending on ore hardness and configuration.
Power Requirements: Prime mover options include:
Electric Motor: 30 75 HP (22 56 kW), depending on stamp battery size (520 stamps).
Diesel Engine Drive: Equivalent horsepower range for offgrid applications.
Material Specifications:
Stamp Shoes & Dies: HighChrome Cast Iron or Manganese Steel.
Mortar Box & Frame: ASTM A48 Class 40 Gray Iron.
Camshaft & Lifters: Forged Steel, normalized and stressrelieved.
Physical Dimensions (Typical 10Stamp Mill): ~4m L x 2.5m W x 3m H (excluding feed hopper).
Environmental Operating Range: Designed for ambient temperatures from 10°C to +45°C; requires protection from extreme precipitation if electrical components are present.

6. APPLICATION SCENARIOS

Alluvial/Vein Mining Cooperative Challenge:| Challenge:| A West African mining cooperative faced low recovery rates using manual methods on hard quartz veins. High capital cost and grid power unreliability ruled out standard ball mills.| Solution:| Implementation of two dieselpowered 10stamp mills with integrated mercuryfree gravity concentration tables.| Results:| Throughput increased to 40 TPD per mill with consistent grind size. Overall project gold recovery improved from an estimated <40% to over 72%, paying back equipment cost in under 8 months of operation.

Historic Tailings Reprocessing Project Challenge:| Challenge:| A project in South America aimed to recover gold from historic tailings where material was already partially crushed but contained agglomerates.| Solution:| A single, electricpowered 5stamp mill was used as a tertiary liberator ahead of centrifugal concentrators.| Results:| The stamp mill effectively broke apart agglomerates without overgrinding the valuable material, increasing feed consistency to concentrators by over 50% and boosting final recovery by approximately18%.

7. COMMERCIAL CONSIDERATIONS

Pricing Tiers: Capital cost is scaledependent.
Tier I (75 TPD): Customconfigured multibattery plants with advanced slurry handling.
Optional Features: Automated feed controllers; advanced composite wear liners; integrated safety guarding packages; vibration monitoring sensors; tailings slurry pumps.
Service Packages: Extended warranty plans; annual inspection contracts; remote technical support; operator training programs onsite.
Financing Options: Equipment leasing structures tailored to mining cash flow; milestonebased purchase plans; partnership models for eligible projects.

8.FAQ

1.Q:What type of ore feed size is required?
A:A stamp mill accepts runofmine ore typically up to ~2 inches in diameter without precrushing in many configurations,a significant advantage over many finecrushing circuits which require precise jaw crusher sizing first

2.Q:What are the primary operational costs?
A:Dominant costs are power consumption(diesel or electric),regular replacement of cast iron stamp shoes/dies,and routine bearing maintenance.Labor costs are generally lower than more complex milling circuits due to simpler operation

3.Q.How does particle size control compare to a ball mill?
A:A ball mill offers finer grinding.A stamp mill produces a controlled coarsetomedium sand ideal for direct gravity separation.This can be advantageous as it minimizes problematic slimes generation that can interfere with certain recovery methods

4.Q.Is this technology suitable for a fully permitted,midsize commercial operation?
A.It serves specific niches effectively.Initial pilot plant testing on your ore is strongly recommended.For midsize commercial primary processing,a stamp mill often functions best as part of a hybrid circuit,e.g.,handling primary crushing before finer grinding

5.Q.What is the typical delivery lead time?
A.For standardized models lead time ranges from1220 weeks exworks factoring foundry casting cycles machining assembly,and testing.Custom configurations require additional engineering time

6.Q.Are modern safety features included?
A.Contemporary designs include fully enclosed drive guards lockout/tagout points emergency stop systems,and guarding around moving stamps meeting core international machinery safety standards