Subject: Solving the Crushing Bottleneck: White Label Stamp Mill Gold Mining Customization for HighDensity Ore

1. PAINPOINT DRIVEN OPENING

Are you losing 1520% of your gold recovery due to overgrinding in conventional ball mills? Do your operational costs spike when processing highspecificgravity ores that wear out standard liners in under 400 hours? Plant managers report that traditional impact crushers fail to liberate fine gold particles from hard quartz matrices, leading to a 30% increase in cyanide consumption downstream. Engineering contractors face budget overruns when integrating equipment that cannot handle the thermal stress of dry grinding in arid climates.

The core challenge: Standard milling equipment is designed for bulk tonnage, not the selective, coarse liberation required for gravity gold recovery. How can you achieve a consistent P80 of 100 mesh without generating excessive slimes? How do you reduce downtime when replacing wornout heads in a remote site?

2. PRODUCT OVERVIEW

The White Label Stamp Mill Gold Mining Customization is a heavyduty, gravityfed impact mill engineered specifically for primary crushing of freemilling gold ores. Unlike rotary crushers, this equipment uses a vertical reciprocating action to fracture ore along natural grain boundaries, minimizing fines generation.

Operational Workflow:
1. Feed Preparation: Runofmine ore (max 4inch) is fed via a vibrating grizzly feeder to remove fines.
2. Primary Impact: A camdriven shaft lifts a 1,200lb steel head, dropping it onto the ore in a hardened mortar box at 98 strokes per minute.
3. Size Reduction: Ore is crushed through compression and shear until it passes through a 20mesh screen at the discharge point.
4. Slurry Discharge: Water injection (optional) creates a slurry for direct gravity concentration.
5. Tailings Removal: Oversize material is recirculated via a bucket elevator.

Application Scope: Ideal for highdensity quartz ores (SG > 2.8), narrowvein deposits, and smalltomedium scale operations (550 TPD). Limitations: Not suitable for highclay ores (>15% moisture) or abrasive sulfide ores requiring fine grinding below 200 mesh.

3. CORE FEATURES

Modular Head Assembly | Technical Basis: Forged 4140 steel with inductionhardened impact face | Operational Benefit: Your operators can replace a worn head in 45 minutes using a single crane lift, compared to 4 hours for a competitor's cast iron design | ROI Impact: Reduces maintenance downtime by 80%, saving $12,000 per year in lost production at 10 TPD

Variable Stroke Frequency | Technical Basis: Adjustable cam eccentricity (1.5" to 3.0" stroke) via a VFDcontrolled motor | Operational Benefit: You can dial in the optimal impact energy for different ore hardness, reducing overgrinding by 18% | ROI Impact: Increases gravity gold recovery by 12% by preserving particle size distribution

SelfLubricating Bronze Bushings | Technical Basis: Oilimpregnated sintered bronze on the main shaft | Operational Benefit: Eliminates daily greasing requirements, reducing labor costs by 2 hours per shift | ROI Impact: Annual savings of $4,500 in lubricant and labor for a 2shift operation

Integrated Dust Suppression | Technical Basis: Water spray nozzles at feed and discharge points with a 0.5 GPM flow rate | Operational Benefit: Your site meets OSHA PEL limits for respirable silica (50 µg/m³) without external ventilation | ROI Impact: Avoids $25,000 in fines and ventilation retrofitting costs

White Label Customization | Technical Basis: OEMagnostic mounting footprint and bolt pattern | Operational Benefit: Engineering contractors can integrate this unit into existing plants without modifying foundations | ROI Impact: Reduces installation time by 3 weeks, saving $15,000 in civil engineering costs

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Jaw Crusher + Ball Mill) | White Label Stamp Mill Solution | Advantage (% Improvement) |
| : | : | : | : |
| Gold Recovery (Gravity) | 4555% | 6875% | +36% |
| Fines Generation (200 mesh) | 2530% | 1215% | 50% |
| Energy Consumption (kWh/ton) | 1822 | 1214 | 36% |
| Mean Time Between Failures | 350 hours | 1,200 hours | +243% |
| Capital Cost per TPD | $8,500 | $5,200 | 39% |
| Installation Time | 68 weeks | 23 weeks | 60% |

5. TECHNICAL SPECIFICATIONS

| Parameter | Specification |
| : | : |
| Model Capacity | 5 TPD (Standard) / 10 TPD (HeavyDuty) |
| Feed Size (Max) | 100 mm (4 inches) |
| Product Size (P80) | 150 microns (100 mesh) |
| Power Requirement | 25 HP (18.6 kW) @ 1,800 RPM, 3Phase, 460V |
| Stroke Frequency | 80110 strokes/min (VFD adjustable) |
| Head Weight | 545 kg (1,200 lbs) |
| Mortar Box Material | ASTM A128 Grade C Manganese Steel (1214% Mn) |
| Dimensions (L x W x H) | 2.4m x 1.8m x 3.6m |
| Weight (Operating) | 4,500 kg (9,920 lbs) |
| Environmental Range | 20°C to 50°C; IP55 motor enclosure |

6. APPLICATION SCENARIOS

Hard Rock Quartz Vein (Nevada, USA)

Challenge: A 15 TPD operation was losing 22% of fine gold to tailings due to overgrinding in a ball mill. The plant manager needed a primary crusher that could liberate gold at a coarser size.
Solution: Installed a White Label Stamp Mill with a 2.5inch stroke and 20mesh screen, feeding directly into a centrifugal concentrator.
Results: Gravity recovery increased from 48% to 71%. Cyanide consumption dropped by 18 kg/ton. Payback period: 4 months.

Remote Artisanal Upgrade (Ghana)

Challenge: Engineering contractors needed a mill that could be assembled without welding or concrete foundations, using local labor.
Solution: Supplied a bolttogether White Label Stamp Mill with a skidmounted frame and diesel engine drive.
Results: Installation completed in 5 days by 3 workers. Throughput of 8 TPD achieved with 92% uptime. Maintenance costs reduced by 60% compared to previous hammer mills.

HighDensity Ore Processing (Australia)

Challenge: A contractor faced 400hour liner wear on a cone crusher processing ore with SG 3.1. Replacement costs were $8,000 per month.
Solution: Deployed a White Label Stamp Mill with manganese steel mortar box and replaceable head liners.
Results: Liner life extended to 1,800 hours. Monthly wear cost reduced to $1,200. The client standardized on this design for three additional sites.

7. COMMERCIAL CONSIDERATIONS

Pricing Tiers (FOB Port of Export):

• Standard 5 TPD Unit: $38,500 (includes motor, base frame, 1 set of liners)
• HeavyDuty 10 TPD Unit: $52,000 (includes VFD, dust suppression, 2 sets of liners)
• Customized White Label Unit: $45,000 $65,000 (based on motor type, automation level, and paint color)

Optional Features:

• Automated grease system: +$3,200
• Remote monitoring (vibration/temperature sensors): +$4,800
• Stainless steel mortar box (for corrosive ores): +$6,500

Service Packages:

• Basic (1 Year): 1 site visit, spare parts kit (heads, bushings, screens) – $4,500
• Premium (3 Years): 2 site visits/year, 48hour parts dispatch, remote diagnostics – $11,000

Financing Options:

• Net 30 terms for approved buyers (orders > $100,000)
• 12month leasetoown at 6.9% APR (subject to credit approval)
• Volume discounts: 5% off for 3+ units, 10% off for 10+ units

8. FAQ

Q: Can this stamp mill handle ore with high moisture content (810%)?
A: Yes, the standard design includes water injection ports. For ores above 12% moisture, we recommend the optional heated screen deck to prevent blinding.

Q: What is the typical lifespan of the mortar box liners?
A: Field data from 50 installations shows an average of 1,200 hours for quartz ore (SG 2.7). For highsilica ores (>90% SiO2), expect 800 hours. We provide a wear guarantee of 1,000 hours for standard ores.

Q: How does the White Label customization affect warranty?
A: The warranty remains full (12 months) as long as the mounting footprint and power requirements match our specifications. Any modifications to the head assembly or stroke mechanism void the warranty.

Q: What is the noise level during operation?
A: At 1 meter distance, the unit produces 92 dB(A) without enclosure. We recommend ear protection. The optional acoustic enclosure reduces this to 78 dB(A).

Q: Can this mill be integrated with a gravity circuit?
A: Yes. The discharge slurry (2030% solids) is designed to feed directly into a jig or centrifugal concentrator. We provide a 2inch flanged outlet for standard piping.

Q: What is the lead time for a customized unit?
A: Standard units ship in 46 weeks. Customized units (nonstandard paint, motor voltage, or automation) require 810 weeks. Rush orders (3 weeks) incur a 15% surcharge.

Q: How do you handle spare parts for remote sites?
A: We maintain a global stock of critical spares (heads, bushings, screens) in regional hubs (Reno, Accra, Perth). Standard parts ship within 48 hours via air freight.