1. PAINPOINT DRIVEN OPENING

Are you facing persistent bottlenecks in your gold recovery circuit? Inefficient primary grinding and liberation can directly undermine your entire operation's profitability. Common challenges with conventional crushing and grinding setups include:
High Operational Downtime: Frequent liner changes and unplanned maintenance in primary crushers and ball mills halt your processing line, costing thousands per hour in lost production.
SubOptimal Gold Liberation: Inconsistent particle size from primary grinding limits cyanide leach or gravity recovery efficiency, leaving payable gold locked in tailings.
Excessive Energy Consumption: Overgrinding to achieve target liberation consumes disproportionate power, one of the highest cost centers in mineral processing.
High Media & Liner Wear Costs: Abrasive ore types lead to accelerated consumption of grinding media and mill liners, driving up consumable expenses.
Complexity in Wet Ore Processing: Handling clayrich or highmoisture feed material can lead to clogging, reduced throughput, and increased handling costs.

Is your current primary comminution circuit a source of variable performance and unpredictable cost? What if a robust, purposebuilt solution could provide consistent, coarse liberation with lower operational complexity?

2. PRODUCT OVERVIEW

The Chinese Stamp Mill is a modern reinterpretation of a historically proven principle for coarse gold ore liberation. This gravityimpact crushing equipment is engineered for primary or secondary reduction of goldbearing quartz rock and sulphide ores.

Operational Workflow:
1. Feed Introduction: Runofmine (ROM) ore is fed into a sturdy mortar box.
2. GravityDriven Impact: Mechanically lifted heavy stamps (weights) are released to drop onto the ore bed.
3. Continuous Pulverization: The repeated impact of multiple stamps reduces the ore to a coarse sand consistency.
4. WaterAssisted Discharge: A controlled flow of water flushes the crushed material through a perforated screen plate for classification.
5. Gravity Concentration Ready Output: The discharged slurry presents optimally liberated coarse gold particles for immediate recovery via downstream concentrators (e.g., shaking tables, centrifugal concentrators).

Application Scope & Limitations:
Ideal For: Small to mediumscale hard rock gold operations, pilot plants, artisanal & smallscale mining (ASM) formalization projects, and processing centers dealing with freemilling ores.
WellSuited For: Remote sites with limited grid power or where operational simplicity is paramount.
Limitations: Not designed for fine grinding to ultrafine sizes (<100 mesh). Efficiency decreases with highly ductile or claybound ores without feed preparation.

3. CORE FEATURES

Modular Frame Design | Technical Basis: Bolttogether highcarbon steel structure | Operational Benefit: Enables transport to remote sites and easier onsite assembly/reconfiguration | ROI Impact: Reduces installation time by up to 40% versus monolithic designs, lowering capital deployment delay.

Tungsten Carbide Tip Stamps | Technical Basis: Ultrawearresistant material on stamp shoe impact face | Operational Benefit: Extends service life by 35x compared to manganese steel in abrasive quartz ore | ROI Impact: Cuts consumable costs and related downtime for tip replacement significantly.

Adjustable Screen Plate System | Technical Basis: Interchangeable and rotatable hardened steel discharge screens | Operational Benefit: Operators can control product size distribution and optimize throughput for varying ore hardness | ROI Impact: Maintains target liberation size for maximum gold recovery without overgrinding, saving energy.

Automated Camshaft Lubrication | Technical Basis: Enclosed oil bath or circulating grease system for the lift cam mechanism | Operational Benefit: Eliminates manual greasing points, reduces bearing failures, and ensures consistent stamp lift height | ROI Impact: Lowers preventative maintenance labor by an estimated 15 hours per month and prevents costly drive train breakdowns.

Integrated Water Flow Control | Technical Basis: Valveregulated manifold distributing water to each mortar box | Operational Benefit: Provides precise slurry density management for optimal material discharge and dust suppression | ROI Impact: Improves downstream gravity separation efficiency by ensuring consistent feed density.

HeavyDuty Vibration Isolation | Technical Basis: Rubber composite mounting pads between frame and foundation | Operational Benefit: Absorbs impact forces, protecting the foundation structure and reducing transmitted noise/vibration | ROI Impact: Eliminates costs associated with reinforced concrete foundations and minimizes structural maintenance.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Small Jaw Crusher + Hammer Mill) | Chinese Stamp Mill Solution | Advantage (% improvement) |
| : | : | : | : |
| Coarse Gold Recovery Rate| ~6075% (due to smearing/loss in dynamic mills) | ~8592% (gentle gravity discharge preserves Au particles) | +20% relative recovery |
| Energy Consumption per ton crushed (kWh/t) | 8 12 kWh/t (for twostage crushing/grinding) | 4 6 kWh/t (direct gravity impact) | Up to 50% reduction |
| Consumable Cost ($/ton processed)| $1.50 $2.50 (hammers, liners, dies) | $0.60 $1.20 (stamp tips only) | Up to 60% reduction |
| Mean Time Between Maintenance (MTBM)| 120 200 hours (for mill liner/hammer inspection)| >400 hours (sealed bearing units) |>100% improvement |
| Operator Skill Requirement| MediumHigh (adjustment & troubleshooting)| LowMedium (consistent mechanical process)| Reduced training overhead |

_Field data from comparable alluvial/vein quartz applications._

5. TECHNICAL SPECIFICATIONS

Model Range & Capacity: Available in 2stamp (0.50.8 TPH), 5stamp (1.52.5 TPH), and 10stamp (35 TPH) configurations based on quartz ore of SG 2.7.
Power Requirements: Driven by electric motor or diesel engine. Typical installed power ranges from 7.5 kW (2stamp) to 30 kW (10stamp).
Material Specifications: Hightensile steel frame; Cast iron head/stamp bodies; Tungsten Carbide or hardened alloy steel wear shoes; MnSteel screen plates.
Physical Dimensions (10Stamp Mill): ~4m L x 2m W x 2.5m H (excluding feed hopper).
Environmental Operating Range: Designed for ambient temperatures from 20°C to +45°C; Enclosed lubrication systems ensure performance in highdust environments.

6 APPLICATION SCENARIOS

Vein Quartz Processing Center – West Africa

Challenge: A processing center receiving ore from multiple smallscale mines experienced poor recovery (<65%) using makeshift hammer mills due to excessive gold smearing and inefficient liberation.
Solution: Installation of two parallel 5stamp Chinese Stamp Mills as the primary liberation unit ahead of shaking tables.
Results: Achieved consistent coarse sand product size (10mm). Gold recovery into concentrate improved to an average of 88%. Center throughput stabilized at 22 tons per day with lower reagent consumption due to improved leach kinetics on coarser feed.

Pilot Plant for SulfideBearing Ore – Latin America

Challenge: A mining company required a lowcapital pilot plant to test gravityrecoverable gold from a complex ore without committing to a full ball millCIL circuit.
Solution: A modular Chinese Stamp Mill was deployed alongside a Falcon concentrator in a continuous closedcircuit test loop over six months.
Results:The system provided reliable data on gravityrecoverable gold distribution at coarse sizes.The robust stamp mill handled the variable sulfide ore effectively,informing the final fullscale plant design while producing saleable concentrate during the testing phase

Artisanal Mining Formalization Project – Southeast Asia

Challenge:The need for simple,easytomaintain,and mercuryfree technology for cooperatives processing hard rock ore
Solution:A turnkey system featuring ROM feeding,a Chinese Stamp Mill,and Gemini tables was implemented with comprehensive operator training
Results:The project established three centralized processing hubs.Each hub reported over an eightyfive percent recovery rate while eliminating mercury use.The mechanical simplicity of the stamp mill allowed local technicians to perform all maintenance

7 COMMERCIAL CONSIDERATIONS

Equipment pricing is tiered based on capacity:
• Base Unit Price Range:A complete standalone twostamp mill system starts at approximately [competitive price range].A fivestamp system typically ranges between [midrange price],and tenstamp configurations are priced from [higher price range].
• Optional Features:Pricing varies with upgrades including diesel engine drives vs electric motors automated water injection systems spare parts kits wear monitoring sensors
• Service Packages:Tiered annual support contracts are available covering scheduled inspections remote technical support priority parts dispatch Onsite training programs are offered separately
• Financing Options For qualified buyers financing can be arranged through partner institutions Options include equipment leasing with purchase options milestonebased project financing

8 FAQ

Q What is the typical feed size requirement?
A The Chinese Stamp Mill accepts runofmine feed up too approximately one hundred millimeters diameter Optimal feed size is minus eighty millimeters

Q Can this equipment process wet or clayey material?
A Yes The integrated water flow helps flush material preventing clogging that would occur in dry crushers However extremely high clay content may require prescreening

Q How does particle size output compare with a ball mill?
A The stamp mill produces a coarser product generally within minus two millimeters It is designed for optimal coarse gold liberation not ultrafine grinding It often eliminates need for secondary crushing

Q What are the main wear components?
A The tungsten carbide stamp tips see gradual wear Screen plates also require periodic rotation replacement depending on abrasiveness Primary structural components have multiyear lifespans

Q Is skilled labor required operation maintenance?
A Operation requires minimal training Maintenance involves straightforward tasks like tip replacement which our training covers Complex gearbox repairs are rare but supported via service contracts

Q Can existing gravity circuits integrate this technology?
A Yes It serves as direct replacement upgrade older jaw crusher hammer mill setups Its discharge slurry integrates directly into shaking table sluice box feed systems

Q What delivery timeline installation support expected?
A Standard units ship within eight twelve weeks after order confirmation We provide detailed foundation drawings assembly manuals Onsite commissioning supervision available