1. PAINPOINT DRIVEN OPENING

Are you managing a gold processing operation where inconsistent ore feed, high maintenance costs, and inefficient liberation are eroding your profit margins? The challenges of operating a stamp mill in today’s economic climate are significant. Consider the recurring costs: unplanned downtime for die and shoe replacement, excessive energy consumption per ton of ore processed, and the potential for valuable gold particles to be lost due to inadequate or inconsistent particle size reduction. These factors directly impact your bottom line.

How can you reduce your cost per ton while maintaining reliable throughput? Is there a way to achieve more consistent grind size for improved cyanidation or gravity recovery rates? Can you extend maintenance intervals without sacrificing crushing performance? These are the critical questions facing operations relying on traditional comminution equipment. The solution lies not in a complete plant overhaul, but in specifying a modern, engineered ODM stamp mill built to address these exact operational pain points.

2. PRODUCT OVERVIEW

This product is an Original Design Manufacturer (ODM) heavyduty stamp mill engineered for the primary crushing and coarse grinding of goldbearing quartz ores. It is designed as a robust, modular unit for small to mediumscale mining operations and pilot plants where reliability and simplicity are paramount.

Operational Workflow:
1. Feed: Runofmine (ROM) ore is fed into a sturdy ore hopper, often equipped with a grizzly to scalp oversized material.
2. Crushing & Grinding: Camdriven stamps (510 stamps per mill, depending on model) are lifted and dropped onto the ore bed positioned over a durable mortar box. This repetitive impact fractures the quartz matrix to liberate gold.
3. Particle Size Control: Crushed material passes through a perforated screen plate at the discharge end of the mortar box, ensuring only adequately sized particles exit the circuit.
4. Collection: The discharged pulp (crushed ore and water slurry) is channeled for subsequent processing via sluices, amalgamation plates, or leaching tanks.

Application Scope & Limitations:
Scope: Ideal for freemilling gold ores where gravity recovery is effective; suitable for remote locations with limited infrastructure due to mechanical simplicity; excellent for processing highgrade vein material.
Limitations: Not optimal for fine grinding requirements (<100 mesh); less energyefficient than some modern ball mills for hightonnage applications; performance can be sensitive to feed size consistency and moisture content.

3. CORE FEATURES

Modular Frame Design | Technical Basis: Fabricated highcarbon steel sections with predrilled mounting points | Operational Benefit: Enables rapid site assembly, reduces foundation requirements, and allows for future reconfiguration or relocation | ROI Impact: Cuts installation time by up to 40%, lowering total project capital expenditure.
Forged Alloy Stamp Heads | Technical Basis: Heattreated chromiummolybdenum steel forgings | Operational Benefit: Exceptional resistance to deformation and wear under repeated impact loads | ROI Impact: Extends service life by an average of 60% over standard cast heads, reducing part replacement frequency and inventory costs.
PrecisionMachined Cam Shaft | Technical Basis: Inductionhardened cam lobes on a dynamically balanced shaft | Operational Benefit: Ensures consistent stamp lift height and drop force while minimizing vibration | ROI Impact: Improves power transmission efficiency by ~15% and reduces bearing wear, lowering energy and maintenance costs.
QuickChange Screen System | Technical Basis: Boltclamped screen plates with integrated lifting lugs | Operational Benefit: Allows operators to change screen aperture size or replace worn screens in under 30 minutes | ROI Impact: Reduces downtime for product size adjustment by over 70%, increasing plant availability.
Centralized Greasing System | Technical Basis: Manifold with pushbutton grease points routed to all major bearings | Operational Benefit: Promotes consistent lubrication, prevents contamination ingress, and simplifies routine maintenance checks | ROI Impact: Prolongs bearing service life by an estimated 50%, preventing costly unscheduled stoppages.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Mills) | ODM Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Stamp Head Wear Life| 500 800 operating hours| 1,200 1,500 operating hours| +80% |
| Tonnage per kWh| Highly variable; often unmeasured| Consistent throughput due to balanced design; field data shows ~12% improvement in specific energy consumption| +12% |
| Annual Availability| ~85% (downtime for repairs/ adjustments)| Target of >92% (modular parts & quickchange systems)| +7 percentage points |
| Mean Time To Repair (MTTR)| 812 hours for major component swap| <5 hours due to modular frame & accessible layout| 50% |

5. TECHNICAL SPECIFICATIONS

Capacity Range: Modeldependent; from 0.5 to 3 tons per hour (TPH) of crushed ore.
Power Requirements: Electric motor drive recommended. Standard models require a 15 kW to 45 kW motor (20 HP to 60 HP), depending on stamp configuration (510 stamps).
Material Specifications:
Frame & Mortar Box: ASTM A36 carbon steel plate (min. 10mm thickness).
Stamps & Shoes: AISI 4140 / 42CrMo4 alloy steel, heattreated.
Cam Shaft: EN8 / C1045 steel with hardened lobes.
Bearings: Sealed spherical roller bearings.
Physical Dimensions (Typical 10Stamp Mill): ~4m L x 2m W x 3m H. Weight approximately 810 metric tons.
Environmental Operating Range: Designed for ambient temperatures from 10°C to +45°C. Requires dust suppression water system during operation.

6. APPLICATION SCENARIOS

SmallScale Hard Rock Mine Expansion

Challenge:A West African mining cooperative was manually crushing highgrade ore with hammers, creating bottlenecks and inconsistent particle size that hampered their cyanide leach recovery rates (~65%). They needed mechanized crushing but lacked grid power.

Solution:The implementation of two ODM stamp mills configured with diesel drives replaced manual crushing entirely.

Results:The operation achieved consistent throughput of 1.8 TPH per mill at a target grind size of 20 mesh. Leach recovery rates improved to an average of 88%. Payback on equipment was achieved within seven months based on increased gold production.

Pilot Plant & Bulk Sampling Operation

Challenge:A mineral exploration company required reliable equipment for processing large bulk samples from various prospects across rugged terrain. Equipment needed to be transportable by standard flatbed truck and quick to commission/decommission.

Solution:A single skidmounted ODM stamp mill was deployed as their primary sample processor.

Results:The unit reduced mobilization/setup time at new sites by over twothirds compared to previous contractor arrangements.The consistent crush provided uniform samples across all prospects,yielding more accurate grade estimates.The capital investment was offset by eliminating thirdparty toll milling fees within one field season.

7.COMMERCIAL CONSIDERATIONS

Equipment pricing is tiered based on capacity(stamp count)and drive configuration:
• Base Model(5Stamp,Electric Drive):Entrylevel pricing suitablefor startupsand very lowthroughput operations
• Standard Model(10Stamp,Electric Drive):The most common configuration offering optimal balanceof throughputand power efficiency
• Custom Configuration(8Stamp,Diesel/Hybrid Drive):Priced accordinglyfor specific offgridor hybrid power needs

Optional Features:
• Integrated amalgamation plate tables
• Advanced water recirculation system package
• VFD motor controlsfor precise speed adjustment
• Spare parts starter kit(dies shoes cam lobes)

Service Packages:
• Commissioning&Operator Training:A fixedfee package conducted onsite
• Preventive Maintenance Agreement:Scheduled inspectionsand priority parts dispatch
• Full Service Contract:Covers all laborand partsfor defined period

Financing Options:
Direct leasing arrangementsand equipment financing through partner institutionsare available typically requiring2030%down paymentwith terms rangingfrom24to60months

8.FAQ

Q:What feed sizecan this ODM stamp mill accept?
A:The millis designedfor runofmine(ROM)orewith amaximumfeed sizeof approximately100mm(4inches).A grizzlyis recommendedto preventoversizematerialfrom enteringthe mortarbox

Q:Canyour millsbe integratedwith existinggravitycircuitsor CIP/CILplants?
A Yes.They serveas aprimary crusher/coarse grinder.The dischargepulpcan be directlyfedto shaking tables spiralsor requirefurther ballmillgrindingfor leaching circuitsbasedon yourtargetP80

Q:Whatisthe expectedleadtimefrom orderto delivery?
A Forstandardmodels leadtimeis typically1216weeks.Customconfigurationsmay requireadditional timebasedon engineeringrequirements

Q:Doyou providefoundationdrawingsandplantlayoutassistance?
A Yes.Comprehensiveinstallationmanualsincludingfoundationplans generalarrangementdrawingsandbasicpiping/electricalinterfaceguidanceare providedwith everypurchase

Q:Whatisthewarrantycoverage?
A The standardwarrantyis12monthsonmanufacturingdefectscoveringparts Structuralcomponentslike themainframe carrya5yearwarranty Extendedwarrantiesare availableas partof servicepackages

Q:Aretrainingmaterialsprovidedfor ouroperators?
A Yes.Detailedoperationalmanuals maintenancechecklistsandvideo trainingmodulesare supplied We stronglyrecommendthe onsitecommissioningpackagefor handsovertraining

Q:Doyou offertrialperiodsordemo units?
A We donot offertrial periodsdue tothenatureof industrialcapitalequipment Howeverwe can provideextensivereferencelistsfrom currentclientsin similarapplicationsandarrangevisitswherelogisticallypossible