1. PAINPOINT DRIVEN OPENING

Are you managing gold recovery operations burdened by inconsistent throughput, excessive energy consumption per ton processed, and high longterm maintenance costs? Manual crushing and grinding methods are laborintensive and limit scale, while outdated or improperly sized stamp mill equipment can lead to premature wear, unplanned downtime, and suboptimal mineral liberation. This directly impacts your bottom line through lost production hours and higher operational expenditures.

Key challenges include:
High Operational Cost: Inefficient power transmission and excessive consumable part wear drive up the cost per ton of ore processed.
Throughput Bottlenecks: Inconsistent feed rates and inadequate crushing force can create backlogs, limiting plantwide recovery efficiency.
Maintenance Complexity: Poorly designed stamp mills require frequent, lengthy stoppages for die shoe replacement and camshaft servicing, reducing asset availability.
Recovery Inconsistency: Variable impact force and poor feed control can result in uneven particle size distribution, negatively affecting downstream cyanidation or gravity separation stages.

The central question for plant managers is: how can you achieve reliable, costeffective primary crushing of goldbearing quartz ore while maximizing uptime and simplifying maintenance workflows?

2. PRODUCT OVERVIEW

Our heavyduty stamp mill is engineered for the primary crushing and coarse grinding of gold ores. It functions as a cornerstone piece of gravity concentration or preleach comminution circuits. The operational workflow is a proven mechanical process:

1. Ore Feed: Runofmine or prescreened ore is fed into a mortar box via a regulated feed system.
2. Mechanical Crushing: Powered camshifts lift heavy castiron stamps (shoes) which are then released to drop onto the ore bed within the mortar box.
3. Pulverization & Liberation: The repeated, highimpact blows fracture the quartz matrix, progressively reducing particle size to liberate freemilling gold.
4. Slurry Discharge: Crushed material is washed through a perforated screen plate at the mortar box discharge, creating a slurry for subsequent processing.

Application Scope: Ideal for small to mediumscale mining operations, pilot plants, or as a rugged backup system where simplicity and reliability are paramount. Effective on hard rock quartz veins and alluvial deposits requiring size reduction.

Limitations: Not suitable for fine grinding to ultrafine sizes; typically integrated with ball mills or concentrator tables in a full recovery circuit. Requires a stable foundation due to dynamic loads.

3. CORE FEATURES

Modular Mortar Box Design | Technical Basis: Bolttogether highchrome iron segments | Operational Benefit: Enables replacement of individual wear sections without dismantling the entire frame structure. Downtime for liner service is reduced by up to 70%. | ROI Impact: Lowers longterm parts inventory costs and minimizes production loss during maintenance cycles.

Forged Eccentric Camshaft | Technical Basis: Singlepiece forging with inductionhardened lobes | Operational Benefit: Provides consistent liftanddrop motion with minimal deflection under maximum load, ensuring uniform impact energy across all stamps. | ROI Impact: Eliminates premature camshaft failure—a major cause of catastrophic downtime—extending service intervals by over 300%.

Automated Grease Injection System | Technical Basis: Programmable central lubrication points on all major bearings | Operational Benefit: Your operators are removed from hazardous manual lubrication tasks. Bearings receive precise grease volumes on scheduled intervals. | ROI Impact: Prevents bearing seizure failures, reduces lubricant consumption by an estimated 25%, and enhances workplace safety compliance.

Adjustable Screen Plate System | Technical Basis: Quickrelease clamp mechanism with multiple aperture options | Operational Benefit: Allows rapid change of product sizing based on ore characteristics or downstream requirements in under 30 minutes. | ROI Impact: Increases circuit flexibility to process varying ore grades without prolonged reconfiguration stoppages.

Dynamic Counterweight Balancing | Technical Basis: Flywheelintegrated adjustable counterweights | Operational Benefit: Neutralizes vibrational forces transmitted to the foundation during operation, significantly reducing structural stress and ambient noise levels. | ROI Impact: Lowers installation foundation costs by approximately 15% and extends the structural life of supporting infrastructure.

Centralized Drive Guarding | Technical Basis: Integrated safety canopy over belts, shafts, and flywheels | Operational Benefit: Provides complete passive protection for personnel meeting global ISO safety standards for rotating machinery. | ROI Impact Mitigates risk of costly workplace incidents and associated operational delays.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Stamp Mills) | Our Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Stamp Shoe Lifespan| 400 600 operating hours| 900 1,200 operating hours| +100% (based on field data from comparable quartz ore) |
| Mean Time Between Failure (Camshaft)| ~12 months| 36+ months| +200% (attributed to forging & hardening spec) |
| Tonnage Throughput (for equivalent footprint)| 12 TPH (varies widely)| Consistent 23 TPH rated capacity| +50% throughput efficiency |
| Energy Consumption per Ton| ~12 kWh/ton (estimated)| ~9 kWh/ton (documented)| 25% specific energy use |
| Annual Scheduled Downtime (Maintenance)| 1015 days typical| <5 days planned|< 60% reduction in lost time |

5. TECHNICAL SPECIFICATIONS

Model Range & Capacity: Available in 3stamp (1 TPH), 5stamp (~2 TPH), and 10stamp (~34 TPH) configurations under continuous feed conditions with standard ore hardness.
Power Requirements: Driven by a hightorque electric motor ranging from 15 HP (3stamp) to 50 HP (10stamp). Voltage adaptable to site specifications (380V480V / 5060Hz).
Material Specifications: Mortar box liners manufactured from NiHard or highchrome cast iron (500+ BHN). Stamps constructed from forged steel with interchangeable cast iron shoes.
Physical Dimensions (5Stamp Exemplar): Operating footprint of approximately 3m L x 2m W x 2.5m H excluding feed hopper discharge chutes.
Environmental Operating Range: Designed for operation in ambient temperatures from 20°C to +45°C with appropriate lubricants. Enclosed bearings provide protection against dust ingress in nonhazardous area classifications.

6. APPLICATION SCENARIOS

Hard Rock Quartz Vein Processing – West Africa

Challenge: A midtier operation experienced frequent breakdowns of aging stamp mill equipment processing hard quartz ore (>7 Mohs), causing unpredictable downtime exceeding two weeks monthly.
Solution Implementation of a new heavyduty stamp mill featuring the forged camshaft modular mortar box design was integrated into their existing gravity circuit.
Results Field data collected over six months showed a reduction in unplanned crusherrelated downtime by over %. Throughput stabilized at metric tons per day enabling more consistent feed to their shaking tables

Pilot Plant & Bulk Sampling – Canada

Challenge An exploration company required reliable semicontinuous crushing for bulk sampling but needed equipment that could be transported between sites without complex reassembly
Solution A modularized stamp mill skidmounted design was deployed allowing for disconnection into three major subassemblies for transport
Results The unit achieved targeted particle size distribution PSD across varying sample batches providing consistent material for metallurgical testing Setup time between sites was reduced by compared to previous contractorbased crushing solutions

Artisanal & SmallScale Mining Formalization – South America

Challenge A cooperative sought to upgrade from manual crushing methods improve gold recovery rates reduce environmental impact from mercury use
Solution A complete turnkey circuit centered on our stamp mill paired with dewatering cyclones shaking tables was installed including operator training
Results Gold recovery rates increased from an estimated % using manual methods % through measured concentrate production The mechanical system provided safer predictable output supporting better operational planning

COMMERCIAL CONSIDERATIONS

Equipment pricing is tiered based on capacity configuration:
Tier I (Stamp Pilot/Skidded Unit): Entrylevel pricing suitable for bulk sampling or very smallscale production
Tier II (Stamp Standard Production Unit): Our most common configuration offering optimal balance of throughput capital cost includes standard guarding lubrication system
Tier III (Stamp HighCapacity Unit): Designed for continuous duty in established plants includes premium features like automated grease systems enhanced monitoring sensors

Optional Features:
Variable frequency drive VFD motor control finetuning impact frequency power management
Integrated water spray bars dust suppression within mortar box
Remote vibration monitoring sensors predictive maintenance data collection
Spare parts kits tailored expected first years operation

Service Packages:
Basic Warranty months parts months labor covering manufacturing defects
Extended Service Agreement Includes annual inspections priority parts dispatch discounted labor rates
Onsite Commissioning Training Recommended ensures optimal startup operator proficiency safety protocols

Financing Options Available through partner institutions include equipment leasing structures tradein programs legacy machinery facilitating capital expenditure management

FAQ

What upstream preparation does my ore require before feeding into your stamp mill?
Runofmine ore should ideally be reduced below mm via primary jaw crusher ensure efficient operation prevent blockages maximize throughput consistency

Can this equipment be integrated into my existing gravity concentration circuit?
Yes our stamp mills are designed compatibility standard slurry handling systems Particle size discharge controlled via interchangeable screen plates match requirements downstream concentrators like shaking tables jigs

What are typical lead times delivery installation?
For standard models lead time ranges weeks exworks Custom configurations may require additional time Site installation commissioning typically requires days supervised our technician depending foundation readiness

Are spare parts readily available what expected inventory should we hold?
We maintain global distributor network critical wear parts shoes screen plates Based operational data we recommend holding minimum one set shoes one set screen plates liner segments minimize potential production delays due logistics

Do you offer performance guarantees?
We provide guaranteed mechanical performance specifications including rated throughput under defined conditions specific energy consumption within stated range Equipment must installed operated according our provided guidelines achieve these guarantees