1. PAINPOINT DRIVEN OPENING

Are you facing persistent bottlenecks in your gold processing circuit due to unreliable or inefficient comminution? The challenges of pilotscale testing and process validation for gold recovery are welldocumented. Inconsistent or inaccurate results from your export stamp mill gold mining testing can lead to costly downstream errors, including:
Capital Misallocation: Scaling up a process based on flawed liberation data risks millions in underperforming plant equipment.
Recovery Uncertainty: Without precise grind size control and reliable discharge simulation, predicting actual gold recovery and grade is guesswork.
Operational Downtime: Testing delays or equipment failure directly postpone project timelines and revenue generation.
High Operating Costs: Inefficient, manuallyintensive test milling consumes excessive labor, power, and sample material.

How can you obtain definitive, scalable data to derisk your gold project investment? The answer lies in moving beyond antiquated methods to engineered, precision testing equipment designed for the specific demands of gold ore characterization.

2. PRODUCT OVERVIEW

This product line comprises engineered, modular export stamp mill gold mining testing units. These are not replicas of historical production stamps but are precisiondesigned batch mills that simulate the mechanical crushing and grinding action of a traditional stamp battery for the explicit purpose of metallurgical testing and process flowsheet development.

Operational Workflow:
1. Sample Preparation: A calibrated mass of crushed ore feed (typically 6mm) is loaded into the mortar box.
2. Precise Comminution: Programmable camshafts lift and drop weighted stamps onto the ore bed with controlled frequency and force, achieving targeted particle size reduction.
3. Controlled Discharge & Collection: The ground pulp is discharged through an interchangeable screen grate, simulating a closedside setting, and collected for washing and concentration.
4. Analysis: The resulting product is analyzed for grind size (P80), mineral liberation, and subjected to gravity concentration or cyanidation tests to establish recovery parameters.

Application Scope & Limitations:
Scope: Ideal for freemilling gold ores, sulphideassociated gold ores requiring gravityrecoverable gold (GRG) testwork, pilot plant feed preparation, and calibration of comminution models. Essential for feasibility studies where traditional stamp mill performance data is required.
Limitations: Not designed for continuous production or hightonnage processing. Less effective for purely refractory ores requiring ultrafine grinding without supplementary equipment.

3. CORE FEATURES

Modular Frame & Mortar Box | Technical Basis: Bolttogether highcarbon steel construction with replaceable wear liners | Operational Benefit: Enables rapid assembly/disassembly for export shipping and easy liner replacement infield, minimizing logistics cost and maintenance downtime | ROI Impact: Reduces international freight volume by up to 40% versus welded units; extends service life by allowing localized wear management.

Programmable Camshaft Control | Technical Basis: Variable frequency drive (VFD) with digital stroke counter and timer | Operational Benefit: Your operators can precisely replicate specific energy input (kWh/t) and simulate different drop rates/forces critical for test consistency | ROI Impact: Eliminates test variability; one standardized test protocol can reliably scale to full plant design, preventing over or underengineering.

Interchangeable Discharge Grates | Technical Basis: Hardened steel grates manufactured to precise slot dimensions | Operational Benefit: Allows simulation of different closedside settings to generate product size curves essential for gravity circuit optimization | ROI Impact: Provides definitive data for screen/classifier selection in the final plant, optimizing initial recovery stages.

Integrated Dust Suppression System | Technical Basis: Sealed mortar box with water injection ports and slurry containment skirts | Operational Benefit: Contains silica dust during dry milling phases and controls slurry splash, protecting operator health and ensuring sample integrity | ROI Impact: Mitigates regulatory compliance risk in test facilities; prevents valuable sample loss.

Calibrated Stamp Weights | Technical Basis: Machined cast iron weights with certified mass tolerances (±0.5%) | Operational Benefit: Delivers consistent kinetic energy per blow, ensuring repeatable breakage forces across all tests | ROI Impact: Builds confidence in test data from internal teams and external financiers during due diligence.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Basic Test Mills) | Our Export Stamp Mill Gold Mining Testing Solution | Advantage (% Improvement) |
| : | : | : | : |
| Test Result Repeatability (P80 Variance) | ±15% due to manual operation & wear | ±5% via programmable control & calibrated weights | 66% More Consistent |
| Sample Throughput per 8hr Shift | 34 batches (manual feeding/cleaning) | 68 batches (optimized feed/discharge) | 100% Increase |
| Wear Liner Replacement Time | 46 hours (weldedinplace) | <1 hour (modular boltin) | 80% Reduction |
| Specific Energy Consumption Accuracy| Estimated calculation from averages| Direct measurement via integrated kWh meter & load cells| Data Accuracy within ±3% |

5. TECHNICAL SPECIFICATIONS

Capacity/Rating: Batch size from 5kg to 50kg per charge; configurable for standard Davis tube or Knelson concentrator feed requirements.
Power Requirements: 7.5 kW / 10 HP electric motor; compatible with 415V/50Hz or 460V/60Hz threephase power. VFD included.
Material Specifications: Frame ASTM A36 steel; Mortar Box liners AR400 or optional chromium carbide overlay; Stamps forged highcarbon steel with tungsten carbide tips (optional).
Physical Dimensions (Assembled): ~2.5m L x 1.8m W x 2.2m H. Exportcrated dimensions optimized for 20ft container.
Environmental Operating Range: Designed for laboratory or sheltered outdoor installation. Operating temperature range: 5°C to 45°C.

6. APPLICATION SCENARIOS

Alluvial/Eluvial Gold Project Feasibility Study

Challenge: A West African project needed reliable GRG data from clayrich saprolite ore but standard bond mill work provided poor simulation of potential coarse gold recovery in a planned gravity circuit.
Solution: Implementation of a twostamp testing unit with interchangeable grates set at 1mm and 2mm.
Results: Testing identified +95% GRG recovery at a coarse P80 of 1.2mm, enabling client to specify a simpler, lowercapital crushinggravity circuit instead of full leaching plant.

Historic Mine Tailings Retreatment Scoping

Challenge: An engineering contractor required representative milling of composite tailings samples to validate cyanide leach extraction rates without overgrinding already fine material.
Solution: Use of a lowfrequency, singlestamp test mill configuration for gentle attritioning and liberation refreshment.
Results: Achieved target liberation with minimal slimes generation; leach tests confirmed economically viable extraction rates, derisking the project for investors.

7. COMMERCIAL CONSIDERATIONS

Pricing Tiers: Base unit configurations start at the entrylevel for standard batch sizes. Premium tiers include advanced instrumentation packages (automated sampling, realtime power monitoring).
Optional Features: Tungsten carbide stamp shoes; secondary containment trays; spare parts kits; OEMcertified installation & commissioning supervision.
Service Packages: Annual inspection contracts remote technical support access extended warranty plans covering frame integrity
Financing Options Available through partner institutions including equipment leasing structures tailored for project development companies

8.FAQ

Q1 How does this testing unit correlate results to a fullscale operational stamp mill?
A1 By controlling key variables—stamp mass drop height frequency discharge grate aperture—the unit applies fundamental comminution mechanics that scale using established energysize reduction relationships Field calibration data from multiple projects supports this correlation

Q2 What training is required for our laboratory technicians?
A2 Comprehensive operational manuals video guides are provided We recommend a halfday familiarization session typically conducted during commissioning

Q3 Can the unit process hard rock quartz vein samples as effectively as softer oxidized ores?
A3 Yes The programmable drive allows adjustment of impact force number of blows per sample to accommodate a wide range ore competencies from soft saprolite to competent quartz

Q4 What is the typical lead time from order placement commissioning?
A4 For standard configurations lead time is XY weeks excluding international shipping Expedited manufacturing options are available

Q5 How does your company support maintenance parts supply globally?
A5 We maintain strategic parts inventories on three continents Critical wear components like liner plates grate screens are stocked for express shipment

Q6 Are test results from your equipment accepted by major financial institutions for feasibility study reporting?
A6 Yes Our export stamp mill gold mining testing units are recognized by leading independent metallurgical laboratories their data is routinely included in bankable documents compliant with JORC NI 101 reporting standards

Q7 Can the unit be adapted later if our testing needs change?
A7 The modular design allows future upgrades such as adding more stamps integrating automated feed systems retrofitting newer control panels protecting your initial investment