1. PAINPOINT DRIVEN OPENING

Are you facing persistent bottlenecks in your gold processing circuit due to inefficient primary grinding? The performance of your initial size reduction stage directly dictates downstream recovery rates and overall plant profitability. Common challenges with conventional primary crushing and grinding setups include:

High Operational Downtime: Frequent liner changes and mechanical failures in jaw crushers or primary ball mills lead to unscheduled stoppages, costing hundreds of production hours annually.
Suboptimal Liberation: Inconsistent feed size from primary processing can cause poor gold particle exposure, trapping valuable material in waste rock and reducing overall cyanidation or gravity recovery yields by 515%.
Excessive Energy Consumption: Older, oversized primary milling equipment operates at low efficiency, with a significant portion of input power converted to heat and noise rather than productive grinding work.
High Maintenance Labor Costs: The arduous, manual task of maintaining heavyduty primary crushers consumes skilled labor hours and increases safety exposure for your crew.

Is your operation sacrificing gold recovery and margin due to an unreliable or inefficient primary size reduction system? The solution lies in selecting the right foundational technology for consistent, controllable feed preparation.

2. PRODUCT OVERVIEW

The Chinese Stamp Mill is a modern reinterpretation of a historically proven principle, engineered for robust primary crushing and coarse grinding in gold mining applications. This gravitydriven hammer mill is designed as a reliable, lowercapacity alternative or supplement for processing goldbearing quartz rock at the head of a milling circuit or within smallscale/artisanal operations.

Operational Workflow:
1. Feed Introduction: Runofmine (ROM) or primarily crushed quartz ore (typically <50mm) is fed into a vertical guide box.
2. GravityDriven Impact: A series of mechanically lifted heavy stamps (wooden or metal rods shod with iron shoes) are released to drop onto the ore bed contained within a mortar box.
3. Particle Reduction: The repeated impact of the stamps fractures the ore through sheer force, progressively reducing it to a coarse sand consistency.
4. Slurry Formation & Discharge: Water is introduced into the mortar box, creating a slurry that passes through a fine screen at the discharge end. Oversize material remains for further crushing, while the liberated slurry reports to downstream concentration (e.g., sluices, shaking tables).

Application Scope & Limitations:
Ideal For: Smalltomedium scale operations, pilot plants, toll processing centers, or remote sites with limited access to grid power or complex maintenance infrastructure. Effective on freemilling gold ores hosted in brittle quartz matrices.
Limitations: Not suitable for hightonnage operations (>50 TPD typically). Less effective on clayrich, wet, or highly ductile ores that absorb impact energy. Requires consistent ore feed size for optimal operation.

3. CORE FEATURES

Modular Stamp Battery Design | Technical Basis: Independent unit operation | Operational Benefit: Allows for partial plant operation during maintenance on one stamp; enables scalable capacity by adding units | ROI Impact: Reduces total plant downtime risk and supports phased capital investment.

Tungsten CarbideShod Stamp Shoes | Technical Basis: Superior wear resistance over traditional cast iron | Operational Benefit: Extends service life between shoe changes by 300400%, maintaining consistent impact energy | ROI Impact: Lowers consumable parts cost per ton and reduces labor hours dedicated to replacement.

Adjustable Drop Height & Frequency | Technical Basis: Mechanically variable camshaft design | Operational Benefit: Operators can finetune impact energy for varying ore hardness and target grind size | ROI Impact: Optimizes liberation yield for specific ore bodies, maximizing overall gold recovery.

Integrated Wet Milling & Discharge | Technical Basis: Continuous water wash through grated mortar box | Operational Benefit: Simultaneously grinds and classifies material, preventing overgrinding and moving product slurry directly to concentration | ROI Impact: Simplifies plant layout, reduces need for separate feed conveyors and water addition points.

LowTech Mechanical Drive System | Technical Basis: Direct lineshaft drive from diesel engine or electric motor with simple gear reduction | Operational Benefit: Minimal electronic components; high reliability in harsh environments with easy troubleshooting by onsite mechanics | ROI Impact: Decreases dependency on specialized technicians and reduces vulnerability to electronic control failures.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Small Jaw Crusher + Hammer Mill) | Chinese Stamp Mill Solution | Advantage (% improvement) |
| : | : | : | : |
| Power Consumption per Ton Processed| ~57 kWh/t (combined circuit) | ~34 kWh/t (direct drive efficiency) | Up to 40% reduction |
| Wear Part Cost per Ton Processed| High (jaws, hammers, liners) | Moderate (primarily stamp shoes) | 2535% lower |
| Mean Time Between Failures (MTBF)| 200300 hours (mechanical stress on hammers) | 450+ hours (gravitydriven impact) >50% improvement |
| Target Grind Size Consistency (P80)| Variable (±15%) due to wear & feed fluctuation| Highly consistent (±5%) due to fixed impact zone| Significant improvement in liberation stability |
| Operator Skill Required for Maintenance| MediumHigh (crusher adjustment alignment)| LowMedium (shoe replacement & bolt checks)| Reduced training burden & staffing cost |

5. TECHNICAL SPECIFICATIONS

Capacity Range: 0.5 – 3.0 Tons Per Hour (TPH), depending on ore hardness and target grind size.
Power Requirements: 15 – 30 kW diesel engine or electric motor drive. Standard 3phase or singlephase options available.
Material Specifications: Heavyduty steel frame; Highcarbon steel or manganese steel stamps; Tungsten carbide shoe inserts; Cast iron mortar box with replaceable hardened liners.
Physical Dimensions (Typical 2Stamp Unit): L 2.5m x W 1.8m x H 2.2m; Weight approx. 2,800 kg.
Environmental Operating Range: Designed for 10°C to +45°C ambient temperature; Enclosed gearbox protects from dust and moisture ingress.

6. APPLICATION SCENARIOS

SmallScale Hard Rock Mine & Pilot Plant Testing

Challenge: A regional exploration company needed a reliable method to process bulk samples from multiple quartz veins without investing in fullscale crushing circuits. Variability in ore hardness made small jaw crushers jam frequently.
Solution: Deployment of a portable twostamp Chinese Stamp Mill unit powered by a diesel generator at each test site.
Results: Achieved consistent production of <2mm slurry for cyanidation testing across all sites at an average rate of 1 TPH per unit field data shows operational availability exceeded standard small crushers by over .

Artisanal & SmallScale Mining Cooperative

Challenge: A cooperative using manual crushing faced low throughput (
Solution:: Installation of two threestamp mills as the primary liberation step feeding directly into sluice boxes
: Results:: Throughput increased tenfold while liberating more gold particles early which boosted overall sluice recovery rates by an estimated .The mechanical simplicity allowed cooperative members themselves perform all routine maintenance

Historical Tailings Reprocessing Operation

: Challenge:: Processing old tailings containing brittle but abrasive quartz fragments required gentle yet continuous attrition without generating excessive fines that would complicate modern flotation processes
: Solution:: Integration stamp mill circuit ahead classification desliming units provided controlled coarse grind ideal particle range subsequent flotation
: Results:: Plant achieved target grind p80 microns minimal ultrafines generation leading improved flotation kinetics reagent consumption savings

7 COMMERCIAL CONSIDERATIONS

Equipment Pricing Tiers
Base Unit Tier Includes frame stamps motor drive basic starter package suitable integration existing water slurry systems
Premium Unit Tier Adds features like variable speed drive automated lubrication system spare parts kit extended wear liners
Plant Module Tier Complete skidmounted system including feed hopper water pump piping control panel ready connect power water source

Optional Features
Ore Feed Vibrating Feeder ensure constant head material mortar box Dust Suppression Shroud remote monitoring sensors vibration temperature Slurry Surge Tank pump package

Service Packages
Standard Warranty covers manufacturing defects months operating hours whichever comes first Extended Service Plan includes annual inspection wear part discounts Priority Support Package provides guaranteed response time critical spare parts dispatch

Financing Options Available direct manufacturer leasing through partner financial institutions suitable qualifying businesses also offer leasetoown structures spread capital outlay over initial production period

8 FAQ

Q What maximum feed size can stamp mill accept
A Designed handle run mine rock up approximately diameter ideally feed should prebroken below ensure optimal operation prevent blockages guide box

Q How does stamp mill compare ball mill terms final product fineness
A Not designed achieve same fine grind typical ball mill acts primarily coarse grinder liberator producing granular sand suitable direct gravity concentration finer grinding required product can sent secondary ball mill circuit

Q What typical noise level generated during operation
A While inherently noisy technology modern designs incorporate rubber damping blocks enclosed drive housings reduce sound levels approximately dB measured meter distance site assessments recommended hearing protection always required operating personnel

Q Are spare parts readily available internationally
A Yes standardized design ensures common consumables like shoes liner plates shaft bearings held global distributor network typically shipped within days major mining regions

Q Can this equipment process alluvial gravel material
A Not recommended primary application alluvial deposits contain high clay sand content absorbs impact energy reducing efficiency significantly designed specifically fracturing brittle hard rock materials