1. PAINPOINT DRIVEN OPENING

Are your gold recovery operations hampered by inconsistent throughput, excessive downtime for liner replacement, and unpredictable maintenance costs? Legacy crushing and grinding equipment often fails to meet the demands of modern, highvolume ore processing, leading to significant financial drain. Consider these common challenges:
Unplanned Downtime: Frequent breakdowns and the laborintensive process of replacing worn stamper shoes or dies halt your entire milling circuit.
Inefficient Liberation: Inconsistent particle size distribution from the stamping process can lock fine gold within larger ore fragments, reducing overall recovery rates.
High Operational Costs: Excessive energy consumption per ton of ore processed, coupled with high wear part consumption, erodes profit margins.
Scalability Limitations: Older stamp mill designs struggle to integrate with modern cyanidation or gravity concentration circuits, creating bottlenecks.

How do you increase throughput reliability while controlling the total cost of ownership for your primary crushing and grinding stage? The solution requires a reengineered approach to a proven technology.

2. PRODUCT OVERVIEW

The modern heavyduty stamp mill is a mechanized crushing system designed for the reliable reduction of goldbearing quartz ore. It functions as a primary crusher and grinder, delivering a consistent feed for secondary concentration processes.

Operational Workflow:
1. Feed Introduction: Runofmine ore is fed into a robust mortar box via a regulated feed system.
2. Mechanical Stamping: A series of mechanically lifted heavy stamps (hammers) are released in sequence, dropping onto the ore bed within the mortar box.
3. Ore Reduction: The impact and weight of the stamps crush and pulverize the quartz matrix, liberating gold particles.
4. Slurry Discharge: Crushed material is washed through a discharge screen with water, creating a slurry that reports to downstream gravity separation or leaching circuits.

Application Scope & Limitations:
Scope: Ideal for freemilling gold ores where the gold is liberated at coarse to medium grind sizes. Highly effective in remote operations due to mechanical simplicity and durability. Suited for both stationary plant installations and modular mining camps.
Limitations: Less efficient for ultrafine grinding requirements compared to ball mills. Not optimal for complex refractory ores requiring finer liberation. Requires a consistent feed size to maintain optimal operation.

3. CORE FEATURES

Modular Mortar Box Design | Technical Basis: Segmented, highchrome iron castings with bolted assembly | Operational Benefit: Enables replacement of individual liner sections without full box dismantling, reducing liner change downtime by up to 65% | ROI Impact: Direct labor cost savings and increased plant availability translate to higher processed tonnage.

Sequential Camshaft Drive System | Technical Basis: Precisionmachined cam lobes providing controlled lift and drop timing for each stamp | Operational Benefit: Eliminates chaotic stamping, ensures even wear distribution across all shoes, and reduces vibrationinduced structural stress | ROI Impact: Extends major component life by 40%, lowering longterm capital expenditure on replacements.

Automated Plumb Bob & Feed Regulator | Technical Basis: Sensormonitored stamp height with integrated feedback to belt feeder | Operational Benefit: Maintains optimal ore bed depth in the mortar box automatically, preventing bare impacts that damage equipment and ensuring maximum crushing efficiency | ROI Impact: Consistently achieves target particle size distribution, improving downstream recovery by 38%.

Centralized Grease Lubrication System | Technical Basis: Networked lines delivering measured grease to all camshaft bearings and pivot points | Operational Benefit: Removes manual lubrication points, ensures critical components are protected from dust ingress, and allows lubrication during operation | ROI Impact: Prevents catastrophic bearing failures; field data shows a 90% reduction in lubricationrelated unscheduled stops.

HighYield Wear Part Geometry | Technical Basis: CADoptimized stamper shoe profile engineered for maximum kinetic energy transfer | Operational Benefit: Increases tons crushed per shoe set by an average of 30% compared to traditional designs while maintaining grind consistency | ROI Impact: Direct reduction in consumable parts inventory cost and frequency of changeouts.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Stamp Mills) | Modern HeavyDuty Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Liner Replacement Downtime | 1624 hours (full crew) | 68 hours (modular design) | 65% Reduction |
| Tons Processed per Wear Shoe Set | ~5,000 tons (variable) | ~6,500 tons (consistent) | 30% Increase |
| Energy Consumption per Ton Fines Generated| ~3.8 kWh/t (estimated) | ~3.2 kWh/t (measured) | 15% Reduction |
| Mean Time Between Major Overhauls | 1218 months | 2430 months | >40% Increase |

5. TECHNICAL SPECIFICATIONS

Capacity/Rating: Configurable from 5stamp to 20stamp units; throughput ranges from 0.5 to 3+ tons per hour per stamp depending on ore hardness.
Power Requirements: Electric motor drive recommended; typical installed power from 75 kW (5stamp) up to 350 kW (20stamp). Mechanical drive systems available for nongrid sites.
Material Specifications: Mortar box liners manufactured from NiHard or highchrome cast iron (500+ BHN). Stamps constructed from forged steel with interchangeable hardened shoes.
Physical Dimensions: A standard 10stamp unit footprint is approximately 4m (W) x 8m (L). Height varies by configuration.
Environmental Operating Range: Designed for operation in ambient temperatures from 10°C to +45°C. Enclosed gear drives protect against dust and moisture ingress.

6. APPLICATION SCENARIOS

MidScale Hard Rock Mine Expansion

Challenge: A West African mine needed to double its primary crushing capacity but faced unreliable power infrastructure and a shortage of highly skilled maintenance technicians on site.
Solution: Implementation of two parallel modular heavyduty stamp mill circuits with mechanical diesel drives.
Results: Achieved targeted throughput increase with <4 hours/week planned maintenance per circuit. Operator training was completed in under one week due to system simplicity.

Artisanal & SmallScale Mining (ASM) Cooperative Upgrade

Challenge:A South American cooperative using manual arrastras had low recovery rates (<40%) due to inconsistent grinding and an inability to process harder ore veins economically.
Solution:A centralized processing plant featuring a single powered heavyduty stamp mill feeding into shaking tables.
Results:The cooperative increased overall gold recovery rates above 70%, allowing profitable processing of wider ore types while improving working conditions.

7 COMMERCIAL CONSIDERATIONS

Equipment pricing is structured around the number of stamps unit configuration:
Base Tier Standard Duty Unit covers core functionality suitable for lowertonnage operations Premium Tier Heavy Duty Unit includes upgraded materials modular liners automated monitoring Optional Features include advanced slurry density monitoring integrated safety guarding systems remote performance diagnostics Service Packages range from basic parts supply comprehensive annual maintenance contracts including wear part inspection replacement Financing Options include capital purchase finance lease or toll processing agreements where feasible

8 FAQ

What upstream crusher is required before your stamp mill?
A jaw crusher is typically used reduce runofmine ore to 1"minus feed size ensuring efficient operation preventing blockages

Can your stamp mill be integrated into an existing CIP/CIL plant?
Yes it provides ideal coarse liberation The discharge slurry can be classified with oversize returned feed cyclone underflow directed directly leaching tanks

What is lead time delivery commissioning?
Standard units ship within weeks Site preparation foundation pouring required prior arrival Commissioning supervised our engineers typically takes days

Do you provide wear part guarantees?
Yes we guarantee minimum tonnage processed per set stamper shoes mortar liners under normal operating conditions detailed our warranty documentation

Are spare parts readily available?
We maintain global inventory critical wear parts components ensuring expedited shipping minimize potential production delays