1. PAINPOINT DRIVEN OPENING

Are your gold recovery operations constrained by inconsistent throughput, excessive energy consumption per ton, and unplanned maintenance halting your entire milling circuit? Legacy crushing and grinding methods often lead to suboptimal mineral liberation, directly impacting your overall recovery rate and profitability. Consider these critical challenges:
Throughput Bottlenecks: Can your primary crushing stage keep pace with mine output, or does it create a costly backlog?
High Operational Costs: Are you facing escalating expenses from manual feeding, excessive liner wear, and inefficient power use in the comminution process?
Unplanned Downtime: How often do mechanical failures or lengthy maintenance procedures on key components stop your processing plant?
Recivery Inefficiency: Is incomplete liberation of gold from host rock during the initial grinding phase limiting the effectiveness of your downstream concentration processes?

Addressing these issues requires a robust, reliable primary reduction technology. The right equipment forms the foundation of an efficient mineral processing workflow.

2. PRODUCT OVERVIEW: HeavyDuty Stamp Mill for Primary Gold Ore Processing

A modern heavyduty stamp mill is a mechanized crushing system designed for the primary reduction of goldbearing quartz ore and other hard rock materials. It functions as a foundational piece in gravityrecovery circuits, often deployed in remote or smallerscale operations where simplicity and durability are paramount.

Operational Workflow:
1. Feed Introduction: Runofmine (ROM) ore is fed into a robust steel mortar box.
2. Cyclic Percussion: Mechanically lifted heavy stamps (shoes) are dropped onto the ore bed in a controlled, alternating sequence.
3. Particle Reduction: The repeated impact fractures the quartz matrix, progressively liberating gold particles.
4. Slurry Discharge: Crushed material is washed through a perforated screen plate at the mortar box discharge with a controlled water flow, creating a slurry for downstream concentration.

Application Scope & Limitations:
Ideal For: Primary crushing of freemilling gold ores hosted in quartz veins; small to mediumscale operations; regions with limited grid power favoring mechanical drives; operations prioritizing operational simplicity and high durability.
Considerations: Less energyefficient per ton than modern jaw/cone crushers for very highvolume applications; generates more fines which may not be optimal for certain leaching processes; requires a consistent ore feed size.

3. CORE FEATURES

Modular Stamp Assembly | Technical Basis: Independent, replaceable cast manganese steel shoes and stems | Operational Benefit: Individual stamps can be serviced or replaced without shutting down the entire mill bank, minimizing downtime. | ROI Impact: Reduces planned maintenance windows by up to 60%, increasing annual operating hours.

Regulated Drop Height & Cadence | Technical Basis: Precision camshaft or hydraulic lift mechanism with adjustable timing | Operational Benefit: Provides consistent impact energy for uniform particle size distribution and protects the frame from shock loads. | ROI Impact: Improves grind consistency for better downstream recovery by an average of 58% and extends structural component life.

HardFaced Screen Plate System | Technical Basis: Replaceable alloy steel screens with abrasionresistant weld overlay | Operational Benefit: Maintains precise aperture size longer under abrasive conditions, ensuring proper slurry density control. | ROI Impact: Reduces screen changeout frequency by 40%, lowering parts inventory costs and labor requirements.

Centralized Grease Lubrication | Technical Basis: Automated manifold delivering grease to all major bearing points on the camshaft and lifters | Operational Benefit: Eliminates manual lubrication points, ensuring critical components are protected from dust ingress and wear. | ROI Impact: Decreases bearingrelated failures by over 70%, a leading cause of unplanned stoppages.

Reinforced Mortar Box Design | Technical Basis: Singlepiece cast or heavily ribbed fabricated steel construction with replaceable liners | Operational Benefit: Withstands continuous highimpact loads without fatigue cracking or deformation. | ROI Impact: Avoids catastrophic structural failure; liner replacement is a straightforward scheduled task versus major repair.

Variable Drive Options | Technical Basis: Configurable for diesel engine, electric motor, or even waterwheel drive systems | Operational Benefit: Enables deployment in any operational environment regardless of local infrastructure. | ROI Impact: Provides flexibility in site planning and allows for adaptation to changing energy cost structures.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Stamp Mill) | Modern HeavyDuty Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Mechanical Availability | ~8085% (frequent bearing/cam failures) |> 94% (sealed lubrication, robust framing) |> 10% increase in runtime |
| Liner/Shoe Wear Life| 500 700 operating hours| 900 1,200 operating hours (premium alloys)| Up to 80% longer service life |
| Throughput Consistency| +/ 15% variance due to manual feed & wear| +/ 5% variance (regulated feed & drop)| ~67% improvement in circuit stability |
| Energy per Ton Crushed| Higher (inefficient drives, friction losses)| Lower (optimized mechanical advantage)| Field data shows 1520% reduction |
| Tramp Metal Tolerance| Low risk of catastrophic damage from feeders| High tolerance due to gravitydrop action| Eliminates risk of crusher jamming/breakage |

5. TECHNICAL SPECIFICATIONS

Capacity Rating: Configurable from 1 to 10 tons per hour per stamp bank, based on ore hardness and target grind size.
Power Requirements: Options for 3075 kW electric motor drives or equivalent mechanical horsepower from diesel engines.
Material Specifications: Key wear components (stamps/shoes, screen plates, liners) fabricated from highgrade manganese steel (ASTM A128) or chromium carbide overlay alloys.
Physical Dimensions (Typical 5Stamp Unit): Operating footprint of approximately 4m x 8m; total weight between 1525 metric tons depending on configuration.
Environmental Operating Range: Designed for operation in ambient temperatures from 20°C to +50°C; enclosed bearing systems protect against dust and moisture ingress.

6. APPLICATION SCENARIOS

SmallScale Hard Rock Mine Expansion

Challenge: A growing operation using manual hammer mills faced severe throughput limitations (6 tph with two operators. Plant availability rose by >30%, leading to a calculated payback period on equipment of under 14 months based on increased gold production.

Artisanal & SmallScale Mining (ASM) Formalization Project

Challenge: A cooperative needed to replace dozens of hazardous, inefficient manuallyoperated Chilean mills with a centralized,
safer,
and more environmentally controlled processing solution.
Solution:
Installation
of two parallel
5stamp mills
with integrated water recirculation
and controlled discharge points.
Results:
Gold recovery rates improved from an estimated 65%.
The contained system reduced environmental impact
and provided
a safer,
monitorable production hub,
meeting regulatory standards for formalization.

7.COMMERCIAL CONSIDERATIONS

Equipment pricing tiers are typically structured around stamp bank capacity
and drive configuration:

Base Unit Tier:
Includes core stamp mill frame,
stamp assembly,
standard drive motor,
and basic controls.Pricing is capacitydependent.

Premium Tier:
Adds features like automated grease systems,
variable speed drive control,
hardfaced liners as standard,
and integrated safety guarding.

Optional Features:
Dust suppression shrouds,
belt feeder systems for automated feed control,
spare parts kits,
and advanced instrumentation packages are available à la carte.

Service Packages:
Extended warranties(23 years),
annual inspection contracts,
and operator training programs are offered to ensure longterm performance.Financing options including leasing arrangements
or milestonebased payment plans can be structured through partner institutions to facilitate capital expenditure planning

8.FAQ

Q:What is the maximum feed size for your stamp mills?
A:The recommended maximum feed size is 6 inch(150mm)
runofmine ore.Consistent sizing prevents bridging in the mortar box
and optimizes impact efficiency

Q Can this equipment integrate into an existing cyanidation circuit?
A Yes.Modern stamp mills provide excellent liberation for freemilling ores.The resulting slurry can be fed directly to agitation tanks or require simple classification first.Circuit design review is recommended

Q How does operational noise compare to jaw crushers?
A Stamp mills generate repetitive impact noise which can be significant.Appropriate siting perimeter fencing
and optional acoustic shrouding are important considerations during plant layout

Q What is the typical installation timeline?
A For a skidmounted unit with prepared foundations mechanical installation can be completed within57 days.Electrical tiein
and commissioning require additional time based on site conditions

Q Are spare parts readily available?
A We maintain strategic inventories of all highwear components including shoes stems cams
and screen plates.Guaranteed dispatch of critical spares occurs within48 hours under our premium service plan

Q What training do you provide for operators?
A We include comprehensive onsite training covering safe operation routine maintenance checks troubleshooting procedures
and basic component replacement.This ensures your team achieves rated performance quickly