1. PAINPOINT DRIVEN OPENING

Are your gold recovery operations constrained by inconsistent throughput, excessive downtime for liner changes, or unacceptably high losses of fine and coarse gold? Manual stamp mills and outdated crushing circuits create significant bottlenecks, directly impacting your bottom line. Consider these common challenges:
Declining Ore Grades: Processing larger volumes of lowergrade material to maintain yield puts immense pressure on primary crushing stages.
High Operational Costs: Frequent maintenance cycles, manual feeding, and energyinefficient pounding mechanisms erode profit margins.
Recovery Inefficiencies: Simple gravity separation in traditional setups fails to capture a high percentage of free gold, especially in complex ores.
Scalability Limitations: Fixed, singlestamp or small battery operations cannot easily adapt to increased claim output or changing ore body characteristics.

How do you increase tonnage capacity while improving overall gold recovery rates? Is there a robust solution that reduces perton operating costs and minimizes unscheduled downtime? Modern engineered stamp mill solutions are designed to address these exact operational hurdles.

2. PRODUCT OVERVIEW: HEAVYDUTY MODERN STAMP MILL BATTERIES

A modern stamp mill for gold mining is a mechanized crushing system where vertically guided stamps (410 per battery) are lifted and dropped onto ore fed into a mortar box. This gravityimpact principle is optimized for the liberation of freemilling gold from quartz rock and other host materials. The operational workflow is engineered for continuous, reliable operation:
1. Primary Feed: Sized ore (<2") is consistently fed via conveyor or automated feeder into the centralized mortar box.
2. Cyclic Crushing: Camshafts or hydraulic lifters raise the heavy iron or steel stamps in sequence, releasing them to fall by gravity onto the ore.
3. Slurry Discharge: Crushed material mixes with water in the mortar box to form a slurry, which passes through a perforated discharge screen.
4. Gravity Concentration: The slurry is typically routed directly to downstream concentrators like shaking tables, centrifugal concentrators, or sluices for immediate gold recovery.

Application Scope & Limitations:
Ideal For: Freemilling alluvial or lode deposits, pilot plant testing, smalltomedium scale mining operations (5500 TPD), and regions with limited grid power (can be configured for diesel drive).
Limitations: Less effective for highly refractory ores where gold is locked in sulfides; not a replacement for fine grinding mills like ball mills in complex processing circuits.

3. CORE FEATURES

Modular Battery Design | Technical Basis: Unitized steel frame construction | Operational Benefit: Enables configuration from 3stamp to 10stamp batteries onsite; simplifies transport and installation in remote locations | ROI Impact: Reduces foundation costs and site preparation time by up to 30%

Hardened Alloy Wear Components | Technical Basis: Highchrome iron liners & manganese steel stamps | Operational Benefit: Extends service life of mortars, dies, and shoe liners under continuous abrasive impact | ROI Impact: Lowers costperton for wear parts by an average of 40% compared to standard carbon steel

Precision Mechanical Camshaft Drive | Technical Basis: Balanced crankshaft with adjustable throw & gearreduced electric motor drive | Operational Benefit: Delivers consistent stamp drop height and frequency; minimizes vibration transfer to foundation; allows for stroke adjustment based on ore characteristics | ROI Impact: Improves energy efficiency by 1525% over antiquated directdrive or waterwheel systems

Automated Slurry Management System | Technical Basis: Integrated water injection ports & adjustable screen mesh | Operational Benefit: Maintains optimal solidstowater ratio in the mortar box, preventing packing and ensuring steady slurry flow to recovery units | ROI Impact: Increases overall recovery rate by ensuring liberated gold is efficiently transported to concentrators

Centralized Grease Bank Lubrication | Technical Basis: Manifold system with feed lines to all major bearing points | Operational Benefit: Allows operators to perform fullsystem lubrication from a single point in under 5 minutes, promoting bearing longevity | ROI Impact: Cuts scheduled lubrication downtime by 70% and prevents costly bearing failures

Integrated Safety Guards & Access Platforms | Technical Basis: Fullperimeter guarding with interlocked access gates | Operational Benefit: Protects personnel from moving parts; provides safe access for inspection and screen changes compliant with site safety standards | ROI Impact Mitigates risk of injuryrelated stoppages and liability

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Stamp Mill) | Modern Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Availability (Uptime)| ~75%, frequent unplanned stops for adjustments/repairs| >92%, designed for continuous operation with scheduled maintenance windows| +22% operational availability |
| Tonnage Throughput| Variable, often declines as components wear| Consistent rated capacity (±5%), maintained via durable wear package| Up to +35% throughput per battery |
| Gold Recovery Efficiency| Often 92% with optimized slurry flow to secondary recovery| +8% absolute recovery gain |
| Wear Part Lifetime| Liners replaced every 46 weeks in abrasive ore| Liners last 1216 weeks under comparable conditions| +150% service life |
| Specific Energy Consumption| High due to mechanical losses and inefficient drives| Optimized drive train reduces kWh per ton crushed| 20% energy use per ton |

5. TECHNICAL SPECIFICATIONS

Capacity Range: Configurable from 1 to 10 tons per hour per stamp. Typical 5stamp battery processes 58 TPH depending on ore hardness and feed size.
Power Requirements: Electric motor drive options from 15 kW (2stamp) to 75 kW (10stamp). Configured for 415V/50Hz or 480V/60Hz threephase power. Diesel drive packages available.
Material Specifications: Mortar box liners – NiHard Iron (500 BHN); Stamps – Forged Steel with Manganese Steel shoes; Frame – Structural Steel (S355 grade).
Physical Dimensions (5Stamp Battery): ~4m L x 2.5m W x 3m H. Weight approximately 8,500 kg.
Environmental Operating Range: Designed for operation from 10°C to +45°C ambient temperature. Enclosed bearing housings protect against dust ingress.

6. APPLICATION SCENARIOS

SmallScale Hard Rock Mining Cooperative | Challenge: A cooperative was using three disparate, manuallyfed single stamp mills suffering from low throughput (<3 TPD total) and an estimated 30% loss of fine gold in tailings due to poor slurry handling. |

Solution: Installation of one centralized 5stamp mill battery with a regulated feed conveyor and integrated slurry distribution manifold feeding two shaking tables.| Results: Throughput increased to over 6 TPD consistently. Final tailings assays showed recovery improved to an estimated 91%, increasing monthly yield by over 50% despite only a marginal increase in processed tonnage.

Pilot Plant & Bulk Sampling Operation |

Challenge: An exploration company needed reliable, coarsecrushing equipment for multiple bulk sampling sites that could be transported between locations without major civil works.| Solution Deployment of two modularized portable stamp mill units mounted on roadtrailer frames.| Results Enabled rapid site commissioning (<2 days). Units achieved the required 10 mesh product size for cyanide leaching test columns across varying ore types at each site, providing critical metallurgical data.

7. COMMERCIAL CONSIDERATIONS

Modern stamp mill solutions are offered in tiered configurations:
Base Equipment Package: Includes stamp battery frame, drive motor, standard wear liners, guards, and basic discharge screen.
Optimized Recovery Package: Adds automated feed system integrated water control valves upgraded composite discharge screens
Turnkey Modular Plant Package Includes base equipment mounted on skid complete with feed hopper belt conveyor
Optional Features: Dust suppression systems remote monitoring sensors alternative wear material grades
Service Packages: Tiered plans include scheduled inspection parts kits
Financing Options: Equipment leasing capital expenditure financing

8.FAQ

Q What is the maximum feed size your stamp mills can accept?
A For efficient operation we recommend a maximum feed size of 50mm (2 inches)

Q Can your system be integrated into an existing circuit that uses jaw crushers?
A Yes field data shows our stamp mills are effectively used as secondary crushers following a small jaw crusher creating a wellsized feed

Q How many operators are required?
A A single trained operator can manage feeding monitoring lubrication freeing personnel

Q What is the lead time on critical wear parts?
A We stock key consumables like liner sets shoes ensuring availability within days not weeks minimizing potential downtime events

Q Are your designs suitable for regions without reliable grid power?
A Absolutely we offer integrated diesel generator packages sized specifically