1. PAINPOINT DRIVEN OPENING

Are you managing gold recovery operations burdened by inconsistent throughput, high maintenance costs, and regulatory compliance risks? Inefficient comminution directly impacts your bottom line through lost fine gold, excessive energy consumption per ton processed, and unplanned downtime for liner changes and repairs. Consider these common challenges:
Recovery Losses: Inadequate liberation of gold from quartz or sulfide matrices leads to significant value reporting to tailings.
Operational Inefficiency: Manual feeding, inconsistent particle size distribution, and frequent mechanical adjustments reduce plant throughput and increase labor costs.
High Lifetime Costs: Premature wear of grinding media and liners, coupled with high energy consumption per ton of ore, erodes project margins.
Compliance & Safety Risks: NonCE marked equipment introduces legal liabilities for EU operations and may lack integrated safety features, increasing operational risk.

How do you achieve consistent, compliant, and costeffective ore reduction to optimize cyanidation or gravity recovery yields? The solution requires robust engineering designed for the specific abrasiveness and liberation characteristics of goldbearing ore.

2. PRODUCT OVERVIEW

Our CE Marked Stamp Mill is a modern interpretation of a proven technology, engineered for efficient gravity concentration circuits and precyanidation size reduction in small to mediumscale gold mining operations. It delivers controlled impact crushing through mechanized stamps to liberate gold from host rock.

Operational Workflow:
1. Controlled Feed: Ore is introduced via a regulated feed hopper onto a durable mortar box.
2. Mechanical Percussion: A series of mechanically lifted heavy stamps (shoes) are dropped in sequence onto the ore.
3. Progressive Liberation: The repeated impact fractures the ore, progressively reducing it to a target slurry consistency.
4. Slurry Discharge: The crushed slurry passes over an integrated discharge screen, ensuring optimal particle size reports to the subsequent concentration stage (e.g., shaking tables, centrifugal concentrators).

Application Scope & Limitations:
Ideal For: Freemilling gold ores, pilot plants, remote operations with limited grid power, and operations prioritizing simplicity and robust mechanical design over ultrafine grinding.
Limitations: Not suitable for primary crushing of large runofmine ore or for pulverizing refractory ores requiring sub100 micron particle sizes. Capacity is typically below that of highthroughput ball mill circuits.

3. CORE FEATURES

Modular Frame Construction | Technical Basis: Heavygauge steel frame with predrilled mounting points | Operational Benefit: Simplifies transport to remote sites and allows for straightforward plant layout configuration | ROI Impact: Reduces installation time and costs by up to 30% compared to weldedinplace units

CE Certified Safety Guarding | Technical Basis: Full perimeter guarding with interlocked access gates meeting EU Machinery Directive 2006/42/EC | Operational Benefit: Eliminates operator exposure to moving stamps and drive mechanisms, ensuring compliance for European markets | ROI Impact: Mitigates risk of costly site shutdowns, fines, and liability incidents

Hardened Alloy Stamp Shoes & Mortar Box Liners | Technical Basis: Highchrome white iron castings with Brinell hardness >600 HB | Operational Benefit: Extends service life in highly abrasive quartz/gold ore applications by 23x compared to standard manganese steel | ROI Impact: Lowers consumable cost per ton and reduces downtime frequency for component replacement

Variable Frequency Drive (VFD) Control | Technical Basis: Electric motor drive with programmable VFD for stamp cadence adjustment | Operational Benefit: Allows operators to finetamp stamp drop rate and force based on ore hardness and feed size for optimal liberation | ROI Impact: Improves energy efficiency by matching power draw to process demand; field data shows up to 15% reduction in specific energy consumption

Centralized Grease Lubrication System | Technical Basis: Manifold with metered lubrication points for all major bearings and lift cams | Operational Benefit: Enables safe, rapid maintenance during scheduled stops; ensures consistent bearing life | ROI Impact: Prevents premature bearing failure, a leading cause of unplanned downtime

Integrated Slurry Management Tray | Technical Basis: Seamless slurry collection tray beneath mortar box with standard pipe flanges | Operational Benefit: Directs product slurry efficiently to downstream processes without spillage or loss | ROI Impact: Maximizes recovery by containing all mill product; simplifies plant piping

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Basic Stamp Mill) | Our CE Marked Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Liner & Shoe Wear Life | Manganese Steel (Avg. 500700 hrs) | HighChrome Alloy (>600 HB) | +200% service life |
| Specific Energy Consumption| Fixedspeed motor operation| VFDOptimized stamp cadence| Up to 15% reduction |
| Safety Certification| Often lacks full guarding/CE mark| Full CE compliance (MD/LVD)| Regulatory risk eliminated |
| Installation/Relocation Time| Welded base; requires cutting/fitting| Bolted modular frame design| ~30% faster deployment |
| Operational Consistency| Manual feed; variable slurry density| Regulated feed hopper & slurry tray| More consistent grind & downstream feed |

5. TECHNICAL SPECIFICATIONS

Model Range Capacity: 1 – 5 tons per hour (dependent on ore hardness and target grind size)
Power Requirements: 15 – 45 kW electric motor (380V 480V / 50Hz), VFD included
Stamp Configuration: 4 or 6 stamps per mill; individual stamp weight configurable from 450kg to 900kg
Material Specifications: Frame: S355 structural steel; Stamps/Liners: Highchrome alloy castings; Mortar Box: Hardened steel plate
Physical Dimensions (Typical 4Stamp Unit): ~4m (L) x 2.5m (W) x 3m (H)
Environmental Operating Range: Designed for operation from 20°C to +50°C ambient temperature. Enclosed bearing design protects against dust ingress.

6. APPLICATION SCENARIOS

Alluvial/Eluvial Gold Processing Plant in Eastern Europe

Challenge: A contractor needed a compliant primary grinder for weathered oxide ore ahead of shaking tables. The site had limited grid power but required full CE certification for permitting.
Solution: Installation of a single CE Marked Stamp Mill with VFD control was selected over a small ball mill due to its lower power draw, simpler maintenance profile in dusty conditions.
Results: Achieved consistent throughput of 3 TPH at target P80 of <2mm. CE certification streamlined inspector approval. The VFD allowed tuning for seasonal variations in clay content.

Pilot Plant / Test Facility for Junior Miner

Challenge: A junior mining company required flexible batch grinding capability for metallurgical testing on various vein structures from its exploration property.
Solution: A modular stamp mill was installed as the core of its pilot gravity circuit due its ability handle small batch sizes effectively without the high minimum charge requirement of a ball mill.
Results: Enabled rapid testing of multiple ore zones with quick cleanout between batches. Generated reliable graderecovery curves critical for resource estimation and feasibility studies.

7. COMMERCIAL CONSIDERATIONS

Our CE Marked Stamp Mills are offered in three primary tiers:
1. Standard Duty Unit: For softer oxide ores; includes core mill with fixedspeed drive.
2. Heavy Duty Unit (Recommended): For hard quartz/sulfide ores; includes highchrome liners/stamps,VFD,and centralized lube system.
3. SkidMounted Plant Module: Includes integrated feed hopper,sump,and slurry pump package.

Optional features include automated moisture sensing feed systems,dust suppression shrouds,and advanced vibration monitoring sensors.Service packages range from basic commissioning support through comprehensive annual maintenance contracts including wear part inspection/replacement.Financing options including leasing are available through our partners,making it possibleto preserve capital while deploying compliant equipment.

8.FAQ

Q1.Is this equipment compatible with my existing gravity concentration circuit?
A1.The stamp mill produces a coarse slurry ideal as direct feedfor shaking tables,jigs,and most centrifugal concentrators.Discharge flanges can be adaptedto match your existing pipework.We recommend reviewing your target grind sizewith our engineers.

Q2.What is the typical lead time from order todelivery?
A2.For standard configurations,the lead time is1416 weeks.This includes manufacturing,factory acceptance testing,and preparationfor shipment.Custom configurations may require additional time.

Q3.How does operational cost comparetoa small ball mill?
A3.The primary advantage liesin lower capital costand significantly lower liner/media consumable costsper tonfor coarse grinding applications.Ball mills typically offer higher throughputbut at finer grinds.Stamp mills generally havea lower total costof ownershipfor sub5 TPH applications targeting P80 >1mm.

Q4.What trainingis providedfor ouroperators?
A4.Comprehensive onsite trainingis includedwith commissioning.This covers safe operation,routine maintenance procedures,troubleshooting,and wear part inspection/replacement protocols.Manualsin multiple languagesare provided.

Q5.Does theCE markingcoverthe entire electrical system?
A5.All electrical componentsincluding motors,VFDs,wiring,and control panelsare sourcedfrom certified suppliersand assembledintoa fully compliant system meetingthe Low Voltage Directive(LVD)and EMC requirementsas partofthe overallCE markforthe machinery.This providesa single pointof compliance assurance