1. PAINPOINT DRIVEN OPENING

Are you managing gold recovery operations burdened by inconsistent throughput, excessive maintenance costs, and unpredictable final concentrate quality? For plant managers and engineering contractors, the limitations of a standard stamp mill can directly impact profitability. Consider these common operational challenges:

High Operational Downtime: Frequent liner changes, camshaft wear, and mortar box maintenance halt your processing line. Industry averages indicate unscheduled downtime for legacy stamp mills can reduce annual productive capacity by 1520%.
Inconsistent Grind & Gold Liberation: Variable feed size and worn stamps lead to an uneven grind. This results in poor liberation of gold from host rock, causing recoverable gold to report to tailings. Field audits often show losses of 38% in freemilling ore scenarios due to suboptimal particle size distribution.
Excessive Energy & Labor Costs: Older mechanical designs are inherently inefficient, consuming disproportionate power per ton of ore crushed. Manual monitoring and adjustment of individual stamps further inflate operational expenditures.
Scalability & Control Limitations: Integrating a basic stamp mill into a modern, controlled mineral processing circuit is difficult. Lack of automation compatibility makes it hard to optimize performance against fluctuating ore hardness.

Is your operation seeking a reliable, highperformance comminution solution that delivers consistent grind specification, reduces total operating cost, and integrates smoothly into your existing recovery circuit?

2. PRODUCT OVERVIEW

The modern White Label Stamp Mill is a heavyduty, modular crushing apparatus engineered for the continuous gravityimpact grinding of goldbearing ores. It serves as the primary workhorse for freemilling gold operations, particularly where simplicity, durability, and ease of operation are paramount.

Operational Workflow:
1. Feed Introduction: Runofmine or primarycrushed ore (<50mm) is continuously fed into a centralized hopper, which regulates flow onto a distribution belt.
2. Gravity Impact Crushing: Ore is channeled into individual mortar boxes where mechanized stamps (500kg to 1500kg each) are lifted and dropped in a controlled cycle, pulverizing material through repeated impact.
3. Particle Size Control: Crushed material passes through perforated steel screens at the base of each mortar box. Oversize material is retained for further crushing; liberated material flows forward.
4. Concentrate Laundering: The slurry discharge is typically routed over amalgamation plates or directly to concentration tables for initial gold recovery.

Application Scope & Limitations:
Ideal For: Freemilling gold ores, siliceous reefs, and alluvial/elluvial deposits where gravity recovery is effective. Suited for mediumscale operations (50500 TPD), standalone plants, or as a supplement to larger circuits.
Limitations: Not optimal for refractory ores requiring fine grinding (<100 mesh) or complex chemical liberation. Performance decreases with highclaycontent feeds which can cause screen blinding.

3. CORE FEATURES

Modular Frame Construction | Technical Basis: Prefabricated hightensile steel sections with machined mounting points | Operational Benefit: Enables rapid onsite assembly, future plant reconfiguration, and simplified component access for maintenance crews | ROI Impact: Reduces installation time by up to 40%, lowering contractor costs and accelerating timetoproduction.

HardFaced Composite Stamps | Technical Basis: Forged steel core with weldedon matrix of tungsten carbide inserts | Operational Benefit: Increases wear life by resisting abrasion from siliceous ore; maintains consistent weight for uniform crushing energy | ROI Impact: Extends service intervals by 300400%, reducing spare parts inventory and labor hours per ton processed.

Centralized Grease Injection System | Technical Basis: Manifold with metered lines feeding all major bearing points (camshafts, lifters) from a single station | Operational Benefit: Allows operators to lubricate all critical wear points in under 5 minutes without dismantling guards, ensuring optimal bearing life | ROI Impact: Mitigates risk of catastrophic bearing failure; field data shows a 60% reduction in lubricationrelated downtime events.

Variable Frequency Drive (VFD) Control | Technical Basis: PLCcontrolled drives governing the main crusher motor | Operational Benefit: Permits operators to adjust stamp cadence (drops per minute) in realtime to match feed hardness and target grind size | ROI Impact: Optimizes energy consumption (typical savings of 1015%) and improves product consistency for downstream recovery processes.

QuickChange Screen Cartridge System | Technical Basis: Bolton screen frames with integrated slurry pans | Operational Benefit: Enables a twoperson crew to replace a full set of worn screens in under one hour versus a halfshift on traditional designs | ROI Impact: Minimizes planned downtime during screen changes, directly increasing annual milling hours and throughput.

Integrated Dust Suppression Manifold | Technical Basis: Lowpressure water spray bars mounted at each feed chute and discharge point | Operational Benefit: Effectively controls silica dust at source, improving site safety and regulatory compliance without creating slurry handling issues | ROI Impact: Reduces health & safety incident risk and avoids potential fines related to airborne particulate limits.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Stamp Mill) | White Label Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Availability / Uptime | ~82% (including scheduled maintenance) | ~92% documented operational availability | +12% increase in productive hours |
| Wear Part Lifetime (Stamps) | 800 1,200 operating hours before rebuild required | 2,800 3,500 hours before service required| +250% increase in mean time between failures |
| Specific Energy Consumption| 12 15 kWh per ton processed (average) | 10 12 kWh per ton processed (controlled)| Up to 20% reduction in power cost per ton |
| Throughput Consistency| ±25% variance due to manual feed & wear state| ±10% variance with controlled feed & VFD| +60% improvement in process stability |
| OnSite Assembly Time| 34 weeks with skilled fabricators required| 1012 days using preassembled modules| ~65% reduction in installation labor |

5. TECHNICAL SPECIFICATIONS

Model Range & Capacity: Available in 3, 5, and 10Stamp configurations. Throughput capacity ranges from 55 TPD (3stamp) to 220 TPD (10stamp) on nominal 25mm feed material at medium hardness.
Power Requirements: Main drive motor from 30 kW (3stamp) to 110 kW (10stamp). All models require standard threephase power supply. VFD system included.
Material Specifications: Mortar boxes lined with replaceable AR400 steel liners. Stamps constructed from highcarbon forged steel with tungsten carbide hardfacing options.
Physical Dimensions (10Stamp Unit): Footprint approximately 6m L x 2m W. Total height ~4m including feed hopper.
Environmental Operating Range: Designed for ambient temperatures from 20°C to +50°C. Dust suppression system ensures operation within global particulate emission standards.

6 APPLICATION SCENARIOS

MidTier Gold Producer – West Africa

Challenge A producer was experiencing rapid cam wear and inconsistent grind from aging equipment leading frequent stoppages an estimated 7% loss recoverable gold tailings
Solution Implementation two 5stamp White Label units VFD control hardfaced composite stamps
Results Achieved 94% operational availability within six months specific energy consumption fell 18%. Combined with improved liberation metallurgical accounting confirmed increase overall recovery

Contract Mineral Processing Plant – South America

Challenge A contractor needed modular easily transportable equipment capable handling varied ore types multiple smallscale client sites quick setup teardown times critical profitability
Solution Deployment skidmounted 3stamp White Label mill complete integrated feed conveyor discharge sump
Results Enabled the contractor mobilize full crushing circuit within days new site Standardized components reduced spare parts inventory by Results Unit consistently met target grind size across different ore bodies improving client satisfaction repeat business

COMMERCIAL CONSIDERATIONS

Equipment pricing structured around configuration scale optional features Base capital investment covers mill frame drive system standard liners

Pricing Tiers:
Tier Basic Package includes core mill motor starter basic controls Tier Production Package adds VFD control dust suppression system grease injection Tier Turnkey SkidMounted Package includes integrated feed discharge systems prewired control panel

Optional Features:
Advanced alloy liner packages premium tungsten carbide stamp facings remote monitoring sensors automated grease systems

Service Packages:
Standard warranty covers defects months operating hours Extended service agreements available covering scheduled maintenance parts discounts priority technical support Onsite operator training included all purchases

Financing Options:
Flexible commercial terms available through partner institutions including equipment leasing structures milestonebased payment plans tradein programs legacy machinery

FAQ

What upstream crusher size required optimal performance?
Designed handle primary crushed ore nominal top size mm Jaw gyratory crushers commonly used provide suitable feed distribution ensure even stamp loading prevent premature wear

How does affect my downstream recovery processes?
Delivers more consistent particle size distribution slurry density This stability allows downstream concentrators shaking tables spirals operate peak efficiency leading predictable higher overall recovery rates compared variable output legacy mills

What are the lead times typical delivery installation?
Standard models ship within weeks order exworks Complete skidmounted units require additional fabrication time Delivery installation timelines vary based destination site preparation Our project team provides detailed schedule upon inquiry

Do you offer performance guarantees?
Yes provide guaranteed throughput capacity based specified ore work index Bond grindability specific energy consumption Warranty subject adherence recommended operational parameters feed specifications outlined our technical datasheets

Can this be integrated into existing plant automation SCADA system?
Standard models include PLC VFD control capable providing key data points motor load amp draw operating hours via Modbus TCP/IP protocols This allows integration most modern plant control systems central monitoring