1. PAINPOINT DRIVEN OPENING

Are you managing gold recovery operations burdened by inconsistent throughput, excessive maintenance costs, and inefficient liberation of values from complex ores? Legacy crushing and grinding circuits often struggle with hard rock material, leading to premature wear part failure, unplanned downtime for liner changes, and suboptimal particle size distribution for downstream cyanidation or gravity concentration. This directly impacts your bottom line through lost production hours, high consumable costs, and potential gold losses in coarse tailings. How can you increase milling capacity while controlling operational expenditure? Is your current process reliably delivering the optimal grind size for maximum gold recovery? The solution lies in purposeengineered, robust technology designed for this specific task.

2. PRODUCT OVERVIEW

This product line comprises heavyduty Stamp Mills engineered for the primary crushing and coarse grinding of goldbearing ores. As an OEM factory, we specialize in the direct sourcing and manufacturing of these mills for commercialscale mining and processing operations.

Operational Workflow:
1. Feed Introduction: Runofmine or primarycrushed ore is fed into a mortar box.
2. Percussive Grinding: Mechanically lifted stamps (weighted rods with mallets) are sequentially dropped onto the ore.
3. Particle Size Reduction: The repeated impact fractures the rock material.
4. Slurry Discharge: A continuous wash of water carries the ground slurry through a perforated screen plate for discharge.
5. Gravity Concentration: The slurry is often directed directly over amalgamation plates or to downstream concentrators like shaking tables.

Application Scope & Limitations:
Scope: Ideal for freemilling gold ores, particularly in remote locations or smallerscale operations where simplicity, reliability, and the ability to process coarse feed are paramount. Effective as a primary grinder ahead of finer milling circuits or for direct amalgamation.
Limitations: Not suitable for ultrafine grinding requirements (e.g., below 150 mesh). Efficiency decreases with very wet, clayrich ores that can cause packing. Requires a consistent feed size to maintain optimal performance.

3. CORE FEATURES

Modular Stamp Battery Design | Technical Basis: Independent unit construction | Operational Benefit: Enables phased plant expansion or individual battery maintenance without full circuit shutdown | ROI Impact: Reduces capital outlay timing and minimizes production loss during upgrades

HighCarbon Steel Stamp Shoes & Dies | Technical Basis: Forged alloy for impact resistance and abrasion wear | Operational Benefit: Extended service life under continuous highimpact loading; predictable wear patterns | ROI Impact: Lowers consumable cost per ton and reduces changeout frequency

Adjustable Drop Height & Cadence Control | Technical Basis: Mechanical camshaft or hydraulic lift system engineering | Operational Benefit: Operators can finetune impact energy and grind rate based on ore hardness and feed size | ROI Impact: Optimizes throughput and particle size control for improved downstream recovery rates

Reinforced Mortar Box with Replaceable Liners | Technical Basis: Fabricated steel with boltin abrasionresistant liners | Operational Benefit: Contains the grinding process securely; liners protect core structure from wear | ROI Impact: Major structural components have indefinite life, converting a wear item to a lowcost, easily replaced liner

Integrated Water Flush System | Technical Basis: Engineered spray bars and screen washing | Operational Benefit: Prevents screen blinding and ensures consistent slurry flow; aids in dust suppression | ROI Impact: Maintains designed throughput and provides a safer operating environment

HeavyDuty Foundation & Frame Structure | Technical Basis: Static and dynamic load calculation in design | Operational Benefit: Absorbs operational vibration, ensuring longterm alignment and mechanical integrity | ROI Impact: Eliminates costly foundation repairs and extends the total service life of the asset

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Mills) | Our Stamp Mill Solution | Advantage (% improvement) |
| : | : | : | : |
| Liner/Wear Part Life Cycle (Hard Rock Ore) | 46 Weeks Continuous Operation| 812 Weeks Continuous Operation| +100% to +150% |
| Mechanical Availability (Scheduled Runtime) | ~85% (High unscheduled stops) |> 92% (Modular design reduces downtime)| +7 Percentage Points |
| Energy Efficiency (kWh per ton crushed)| Varies Widely with Feed Size| Consistent consumption due to cadence control| Up to 15% improvement on variable feeds|
| Tramp Metal Tolerance (Feed Contamination)| High Risk of Damage & Stoppage| Designed to minimize seizure risk; simpler clearance procedures| Reduces incident resolution time by ~50%|

5. TECHNICAL SPECIFICATIONS

Capacity/Rating: Models range from 1ton per hour (single stamp pilot units) to 50+ tons per hour (multibattery industrial installations).
Power Requirements: Dependent on model size; typical range from 15 kW (20 HP) for small units to 150 kW (200 HP) for large industrial batteries.
Material Specifications: Primary frame: Structural steel (ASTM A36). Stamps & Wear Parts: Highcarbon forged steel or certified alloy replacements. Liners: AR400 AbrasionResistant Steel.
Physical Dimensions: Custom configurations available. A standard 5stamp battery unit typically requires a footprint of approximately 4m x 6m, excluding feed hoppers and discharge launders.
Environmental Operating Range: Designed for ambient temperatures from 20°C to +45°C. Enclosed bearing systems protect against dust ingress in arid environments; corrosionresistant coatings specified for highhumidity installations.

6. APPLICATION SCENARIOS

Alluvial/Eluvial Deposit Processing Plant

Challenge:A new site with coarse, freemilling gold required a simple, robust primary grinding solution ahead of gravity tables, with minimal reliance on grid power.
Solution:A dieselpowered 3stamp mill battery was installed as the core crushing unit.
Results:The circuit achieved a target grind of 20 mesh at 8 tons per hour, feeding directly to shaking tables. Recovery rates met feasibility study targets with operational availability exceeding 94%.

Hard Rock Quartz Vein Mining Operation

Challenge An existing operation using jaw crusheronly circuits was experiencing significant gold losses in coarse tailings (>30% +100 mesh).
Solution:A stamp mill was integrated as a secondary grinder after the jaw crusher to liberate values from fractured quartz.
Results:Tailings analysis showed gold in +100 mesh fraction reduced by over 80%. Overall plant recovery increased by an estimated 12%, paying back the capital investment in under 14 months.

7. COMMERCIAL CONSIDERATIONS

Equipment Pricing Tiers: Pricing is structured based on stamp battery size (number of stamps), drive system configuration (electric motor vs. diesel), and level of automation/control.
Tier I – Manual/SemiAutomated Single Battery Units
Tier II – MultiBattery Plants with Centralized Control Systems
Tier III – Fully Integrated Modular Processing Plants featuring stamp mills as core components
Optional Features: Automated lubrication systems, remote performance monitoring sensors, custom discharge screen configurations, integrated safety guarding packages.
Service Packages: Extended warranty plans are available alongside scheduled maintenance contracts that include wear part inspections/replacements by factorytrained technicians.
Financing Options: We work with international export credit agencies and equipment financing partners to offer leasetoown or structured purchase plans tailored to project cash flow requirements.

8.FAQ

Q1 Are your stamp mills compatible with existing crushing circuit infrastructure?
A1 Yes.They are designed as modular units that can be integrated as primary,c secondary ,or recrushing stages.Feed hoppers ,discharge launders,and foundations can be engineered to interface with your current plant layout.

Q2 What is the typical lead time from order commissioning?
A2 For standard models lead time is typically1418 weeks exworks.For fully customized large battery plants detailed project planning will define the schedule.Delivery packaging,and documentation are managed according t international shipping standards .

Q3 How does operating cost compare t modern ball mills?
A3 For specific applications involving coarse grinding hard rock stamp mills often present lower energy consumption per ton at that stage nd significantly lower capital cost.They trade ultrafine grinding capability fr simplicity nd robustness making them costeffective within their optimal application window .

Q4 What operator training nd technical support do you provide?
A4 Comprehensive installation supervision commissioning support nd onsite operator training are included Delivery f detailed operation maintenance manuals nd schematics Remote technical support s available via direct channels .

Q5 Can you supply spare parts nd what s their expected availability?
A5 As an OEM factory we guarantee supply f all critical spare parts especially proprietary wear components Standard parts have high availability from stock Longlead items re identified nd recommended fr strategic spares holding .

Q6 What r key factors determining correct model selection fr our ore body?
A6 Selection depends primarily n target throughput ore hardness Bond Work Index desired product size distribution Available power source Feed topsize These factors re analyzed during presales technical review .

Q7 Do you offer performance guarantees?
A7 Yes We provide guaranteed mechanical performance availability figures Equipment capacity ratings r based n defined standard test conditions outlined n our technical proposals .