1. PAINPOINT DRIVEN OPENING

Are you managing gold recovery operations burdened by inconsistent throughput, excessive maintenance costs, and suboptimal mineral liberation? Legacy crushing and grinding circuits often create bottlenecks that directly impact your bottom line. Consider these common challenges:
Unplanned Downtime: Frequent liner changes and mechanical failures in traditional stamp mills halt entire processing lines, costing thousands per hour in lost production.
Inefficient Gold Liberation: Inconsistent particle size distribution from worn or poorly calibrated equipment leads to gold losses in tailings, reducing overall recovery rates.
High Operational Costs: Excessive energy consumption per ton of ore processed, coupled with high labor requirements for operation and manual maintenance, erodes profit margins.
Scalability Limitations: Rigid systems that cannot be efficiently tuned for varying ore hardness or target grind size limit operational flexibility.

Is your operation seeking a robust, reliable comminution solution engineered to maximize throughput and minimize total cost of ownership for primary gold ore processing?

2. PRODUCT OVERVIEW

The Industrial Stamp Mill is a heavyduty, mechanized milling system designed for the primary crushing and coarse grinding of goldbearing quartz ore. It operates on the principle of repetitive dropping of heavy weights (stamps) onto ore fed into a mortar box, fracturing the material through impact.

Operational Workflow:
1. Feed Introduction: Runofmine (ROM) ore is consistently fed into the mill’s mortar box via a regulated feed system.
2. Cyclic Percussion: Mechanically lifted stamps are released in a controlled sequence, delivering highimpact blows to the ore bed.
3. Particle Reduction & Slurry Formation: Crushed ore is combined with process water, creating a slurry that passes through discharge screens at the base of the mortar box.
4. Gravity Separation Feed: The discharged slurry, now optimally sized, is conveyed to downstream gravity concentration systems (e.g., shaking tables, centrifugal concentrators).

Application Scope & Limitations:
Scope: Ideal for hard rock gold mining operations processing quartz veins and other brittle ores. Highly effective in remote locations or smallerscale operations requiring mechanical simplicity and durability over ultrafine grinding.
Limitations: Not designed for fine or ultrafine grinding required for refractory ores. Performance is optimal with ores of consistent hardness; highly abrasive or clayrich feeds may reduce efficiency and increase wear.

3. CORE FEATURES

Modular Mortar Box Design | Technical Basis: Segmented, highchrome iron casting with bolted assembly | Operational Benefit: Enables targeted replacement of worn sections instead of the entire box, drastically reducing part costs and maintenance downtime by up to 70%. | ROI Impact: Lowers longterm parts inventory cost and cuts mean time to repair (MTTR).

Precision Camshaft & Lifter System | Technical Basis: Forged steel lifters on a dynamically balanced, geardriven camshaft | Operational Benefit: Provides consistent stamp lift height and drop energy across all units, ensuring uniform particle size distribution for improved downstream recovery. | ROI Impact: Increases gold recovery consistency by optimizing feed grade for gravity circuits.

Automated Lubrication System | Technical Basis: Centralized grease manifold with programmable intervals for all major bearings | Operational Benefit: Eliminates manual lubrication points, reducing labor requirements and preventing bearing failures due to missed maintenance. | ROI Impact: Extends bearing service life by an estimated 40% and reduces associated labor costs.

Adjustable Discharge Grate | Technical Basis: Perforated steel screens with variable aperture sizing and quickclamp mechanisms | Operational Benefit: Allows operators to finetune product size without stopping the mill by changing screen panels during scheduled pauses. | ROI Impact: Enables rapid adaptation to changing ore characteristics, maximizing throughput.

Vibration Dampening Foundation Frame | Technical Basis: Reinforced steel frame with integrated rubber isolator pads | Operational Benefit: Absorbs operational vibrations, protecting mill integrity and minimizing stress on supporting structures. | ROI Impact: Reduces foundation maintenance costs and extends the structural life of the installation.

DirectDrive Electric Motor Configuration | Technical Basis: Hightorque electric motor coupled via fluid drive or gear reducer | Operational Benefit: Delivers higher energy efficiency and more controllable startup torque compared to traditional beltdrive or diesel systems. | ROI Impact: Cuts energy consumption per ton by approximately 1525% versus legacy designs.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Stamp Mills) | Industrial Stamp Mill Solution | Advantage (% improvement) |
| : | : | : | : |
| Liner ChangeOut Time| 812 hours (full crew) | 23 hours (reduced crew) | ~70% faster |
| Energy Efficiency (kWh/ton)| 8 10 kWh/ton (estimated) | 6 7 kWh/ton (documented) | ~20% improvement |
| Mean Time Between Failures (MTBF)| ~500 operating hours (major components) |> 800 operating hours (major components) |> 60% increase |
| Particle Size Consistency (+/ % target)| +/ 25% variation common within batch cycles|40% more consistent |

5. TECHNICAL SPECIFICATIONS

Capacity Rating: Configurable from 1 to 5 tons per hour per stamp battery; typical 5stamp unit processes 525 TPH depending on ore hardness.
Power Requirements: Electric motor drive; options from 30 kW to 150 kW per battery depending on configuration. Standard supply at 400V/50Hz or customizable.
Material Specifications:
Stamps & Shoes: Forged alloy steel heads on highcarbon steel shafts.
Mortar Box Liners: Highchrome cast iron (500+ Brinell hardness).
Frame & Structure: ASTM A36 carbon steel with corrosionresistant primer.
Physical Dimensions (5Stamp Unit): Approximately L6m x W3m x H4m (excluding feed hopper discharge chute).
Environmental Operating Range: Designed for operation in ambient temperatures from 10°C to +45°C. Enclosed bearing housings protect against dust ingress.

6. APPLICATION SCENARIOS

MidScale Hard Rock Mine – West Africa

Challenge A mine experienced frequent camshaft failures every ~400 hours in its legacy stamp mills due to imbalanced loading dust contamination causing over $120k annually in parts labor downtime
Solution Installation of two new industrial stamp mills featuring the precision balanced camshaft automated lubrication system
Results MTBF increased to over $850$ hours annual unplanned downtime reduced by $85$ Gold recovery saw a $3$ uplift due to more consistent grind size feeding shaking tables

Artisanal & SmallScale Mining (ASM) Cooperative – South America

Challenge An ASM cooperative using manual crushing faced low daily throughput (<0$5 TPH) high physical labor demands inconsistent liberation leading to significant gold losses in tailings
Solution Implementation of a single compact $3$stamp industrial mill powered by a generator set
Results Throughput increased to $4$ TPH liberating labor for other tasks Measured recovery rates improved from an estimated $60$ range to a consistent $78$

7 COMMERCIAL CONSIDERATIONS

Equipment pricing is tiered based on capacity configuration:
Tier I ($1$3 TPH): Single battery units ideal for pilot plants or highgrade vein processing
Tier II ($4$10 TPH): Dual battery systems with common drive for midscale operations
Tier III ($11$25+ TPH): Multiple modular units configured for centralized plant operations

Optional Features:
Diesel power pack integration dust suppression shrouding advanced slurry density monitoring sensors remote performance diagnostics package

Service Packages:
Standard warranty covers parts defects Extended service agreements include scheduled inspections preventive maintenance kits priority technical support Onsite operator training programs are available

Financing Options:
Capital equipment leasing structures are offered through partners milestonebased project financing can be structured for new greenfield installations

8 FAQ

What upstream crusher is compatible?
The industrial stamp mill accepts feed ideally sized at $2$ inch ($50$ mm typically from a jaw crusher Grizzly feeder arrangements can be integrated

How does it integrate with my existing gravity circuit?
The mill discharges a slurry designed for direct pumping distribution onto shaking tables sluices or jigs Minimal modification is typically required beyond ensuring adequate sump pump capacity

What is the expected operational lifespan?
With proper maintenance core structural components have a design life exceeding $15$ years Wear components stamps shoes liners are consumables with service life dependent on ore abrasiveness typically $200$600 hours

Are spare parts readily available?
Yes Critical wear parts are standardized stocked Our guaranteed parts dispatch program ensures availability within $48$72 hours globally

Do you provide installation supervision?
Yes Commissioning supervision by factory engineers is recommended included in premium service packages We provide detailed foundation drawings mechanical electrical interface specifications

What are the payment terms?
Standard terms are $30$ deposit upon order $60$ prior shipment balance before commissioning Custom terms may be available based on project scope credit profile