1. PAINPOINT DRIVEN OPENING

Are you managing gold recovery operations burdened by inconsistent throughput, high maintenance costs, and inefficient particle liberation? Outdated or poorly designed comminution equipment directly impacts your bottom line through excessive energy consumption, unplanned downtime for liner and part replacement, and suboptimal gold recovery rates. Consider these common challenges:
High Operational Cost: Inefficient grinding and crushing can consume disproportionate energy per ton of ore processed.
Frequent Downtime: Traditional stamp mills with inferior metallurgy require frequent shutdowns for maintenance, halting your entire processing line.
Recovery Losses: Inadequate or inconsistent particle size reduction fails to fully liberate gold from host rock, causing valuable material to report to tailings.
Scalability Issues: Manual operation and control in remote locations limit your ability to efficiently scale output with feedstock variability.

The central question for plant managers is this: how can you achieve reliable, highvolume ore reduction with lower operational expenditure and maximized mineral liberation? The solution lies in modern, heavyduty stamp mill technology engineered for the specific demands of gold mining.

2. PRODUCT OVERVIEW

This product line comprises heavyduty, mechanized stamp mills designed for the primary crushing and fine grinding of goldbearing ores. Engineered for continuous operation in demanding environments, these mills transform runofmine (ROM) ore into a finely ground slurry optimized for subsequent cyanidation or gravity recovery processes.

Operational Workflow:
1. Feed: Sized ore (typically 2" to 3") is continuously fed into the mortar box via a regulated feed system.
2. Crushing & Grinding: A series of mechanically lifted heavy stamps (410 per mill) are alternately dropped onto the ore within the mortar box, applying repetitive impact force.
3. Pulverization & Wash: The impact reduces ore particles; a continuous water flow through the mortar box creates a slurry that passes through a discharge screen, ensuring controlled particle size.
4. Discharge: The ground slurry exits for further processing (e.g., amalgamation tables, leaching tanks).

Application Scope: Ideal for small to mediumscale hard rock gold mining operations, pilot plants, and specialized processing circuits requiring a robust mechanical crusher/grinder. Effective on quartz veins and other brittle ores.

Limitations: Less suitable for very hightonnage operations (>500 TPD) where ball mills or SAG mills are standard, or for clayrich, plastic ores that may cause packing in the mortar box.

3. CORE FEATURES

HeavyDuty Cast Mortar Box | Technical Basis: Singlepiece highchrome alloy cast construction | Operational Benefit: Eliminates leakage points and provides superior abrasion resistance against continuous impact | ROI Impact: Reduces replacement frequency by up to 60% compared to fabricated steel boxes, lowering part costs and associated downtime.

Modular Stamp Shoe Design | Technical Basis: Interchangeable, hardened alloy stamp shoes secured with bolted retainers | Operational Benefit: Allows for rapid replacement of only the wear component without dismantling the entire stamp assembly | ROI Impact: Cuts maintenance window by approximately 70% per shoe change versus welded designs, maintaining throughput.

Precision Camshaft & Lifter System | Technical Basis: Forged steel camshaft with inductionhardened lifters on prelubricated roller bearings | Operational Benefit: Ensures consistent lift height and drop timing for uniform grind efficiency with minimal friction loss | ROI Impact: Industry testing demonstrates a 1525% reduction in drive power consumption compared to plain bearing systems.

Adjustable Discharge Grate System | Technical Basis: Perforated steel screens with variable aperture sizes and quickclamp mechanisms | Operational Benefit: Operators can control final grind size by changing screen plates to match ore characteristics | ROI Impact: Optimizes liberation for downstream processes; field data shows potential recovery improvements of 38% by matching grind to mineralogy.

Centralized Grease Lubrication System | Technical Basis: Manifold with metered lines delivering grease to all major bearing points from a single station | Operational Benefit: Enables safe lubrication during operation in under one minute per shift, enhancing bearing life | ROI Impact: Proactively prevents catastrophic bearing failure; documented extension of major bearing service life by over 40%.

Reinforced Structural Frame | Technical Basis: Laminated steel beam construction with vibrationdampening mounts | Operational Benefit: Absorbs dynamic loads from stamp drops, ensuring longterm frame integrity and stable alignment | ROI Impact: Mitigates foundation stress cracks and misalignment issues that lead to major rebuilds, protecting your capital asset.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Mills) | Our Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Stamps Maintenance Interval| 200 300 operating hours | 450 600 operating hours| +100% to +125% |
| Energy Efficiency (kWh/ton)| Estimated 8 10 kWh/ton| Optimized at 6.5 7.5 kWh/ton| ~20% improvement |
| Mean Time Between Failure (Major Bearings)| ~2,000 hours| >3,500 hours| +75% |
| Grind Size Consistency (P80 Variance)| High variance due to wear/wash fluctuation| Low variance via controlled feed & discharge system| Up to 35% more consistent |
| OnSite Rebuild Time (Full Wear Parts)| 48 72 hours| 24 36 hours| 50% downtime |

_Note: Energy consumption is highly oredependent; figures are indicative benchmarks._

5. TECHNICAL SPECIFICATIONS

Model Range & Capacity: Available in 4 (4stamp), 6 (6stamp), and 10 (10stamp) configurations. Throughput ranges from 25 TPH (4) up to 815 TPH (10), depending on ore hardness and feed size.
Power Requirements: Driven by an electric motor via Vbelt transmission. Motor power ranges from 30 HP (22 kW) for a 4 mill to 100 HP (75 kW) for a 10 mill.
Material Specifications:
Mortar Box & Stamp Shoes: HighChrome Alloy Iron (500+ BHN)
Stamps (Legs): Forged MediumCarbon Steel
Camshaft & Lifters: Forged Steel, Induction Hardened
Main Frame: ASTM A36 Structural Steel
Physical Dimensions (6 Mill Example): Approx. Length: 3.5m x Width: 2m x Height: 2.8m. Weight approx.: ~8,500 kg.
Environmental Operating Range: Designed for ambient temperatures from 20°C to +50°C. All electrical components rated IP54 for dust/moisture protection.

6. APPLICATION SCENARIOS

West African Hard Rock Mine – ScaleUp Challenge

Challenge: A midtier operator using manual jaw crushers and hammer mills faced bottlenecks achieving target grind below 1mm at a planned scale of 80 TPD. Recovery was inconsistent due to coarse gold locked in larger particles.
Solution: Implementation of two parallel 10 heavyduty stamp mills as the primary grinding stage after primary jaw crushing.
Results: Achieved consistent P80 of <0.8mm at a combined throughput of ~12 TPH per line. Plant availability increased due to reduced blockages and simpler maintenance. Overall recovery improved by an estimated 6% due to better liberation.

South American Artisanal Cooperative – Modernization Initiative

Challenge: A cooperative sought to replace multiple antiquated, unsafe singlestamp units with centralized processing to increase yield and improve working conditions.
Solution: Installation of one 6 stamp mill with integrated feed conveyor and safety guards as the core of a new processing plant.
Results: Output increased by over 300% compared to prior scattered operations with lower overall energy use per ounce produced. Centralized operation enabled better process control and security while significantly reducing physical labor hazards.

7 COMMERCIAL CONSIDERATIONS

Our stamp mills are offered as complete operating units including motor drive guards Vbelts

Pricing is tiered based on capacity:
Base Equipment Price Range:
4 Stamp Mill Configuration $XX XXX $XX XXX
6 Stamp Mill Configuration $XX XXX $XX XXX
10 Stamp Mill Configuration $XX XXX $XX XXX

Optional Features:
Diesel drive package addon (+1520%)
Automated grease lubrication system (+$X XXX)
Spare parts starter kit various levels
Wear part monitoring sensors

Service Packages:
Standard Warranty includes parts labor defects months
Extended Service Plan covers scheduled inspections wear parts discounts years
On Site Commissioning Training recommended

Financing Options:
Equipment leasing structures available through partners typically months terms
Progressive payment plans tied shipment commissioning milestones

We provide detailed quotations outlining all specifications options terms

8 FAQ

Q What is the typical lead time from order commissioning?
A For standard models lead time is typically weeks ex works Custom configurations may require additional engineering time On site commissioning requires days depending plant readiness

Q Are your stamp mills compatible existing gravity concentration circuits like shaking tables?
A Yes they are specifically engineered produce optimal slurry density particle size distribution efficient gravity separation Proper screen selection ensures ideal feed material downstream processes

Q How does power consumption compare modern ball mill similar capacity?
A For small medium scale applications sub TPH our mechanical stamp mills often demonstrate comparable sometimes lower specific energy kWh ton particularly brittle ores They offer advantage simpler operation lower technical skill requirements remote sites Ball mills become more efficient larger scales above TPH

Q What ongoing operational costs should budget?
A Primary costs are wear parts shoes mortar box liners screens electricity labor Predictive maintenance replacing shoes before failure protects more expensive components Regular grease lubrication essential Annual cost typically representing total operational expenditure excluding power labor

Q Do you provide engineering support plant layout integration?
A Yes we provide basic foundation drawings dimensional layouts interface points feed discharge We recommend clients engage local engineering contractor detailed civil structural design ensure optimal integration existing new circuits

Q Can these mills process tailings reprocessing projects?
A They can effective provided material sized correctly Pre crushing may necessary achieve consistent feed size Consult our engineers specific project details assess suitability