1. PAINPOINT DRIVEN OPENING

Are you scaling your gold recovery operations only to be constrained by washing and scrubbing capacity? Inconsistent feed, high clay content, and inefficient fines recovery directly impact your bottom line. Consider these common challenges:
Bottlenecked Throughput: Your existing scrubber or trommel can't keep up with excavator or dredge output, capping plant capacity at 300 TPH and leaving valuable material stockpiled.
Excessive Downtime & Maintenance: Frequent bearing failures, screen blinding, and unexpected breakdowns in harsh, abrasive environments lead to costly operational stoppages and high parts replacement costs.
Poor Clay & Fines Liberation: Inadequate scrubbing action leaves gold locked in claybound aggregates, resulting in significant recoverable gold reporting to tailings.
High Water & Power Consumption: Older designs are inefficient, consuming excessive water per ton processed and driving up operational expenses in remote sites.

How do you increase plant throughput to 500 TPH reliably while ensuring maximum clay breakdown and gold liberation? What solution minimizes unplanned maintenance and optimizes resource consumption for a superior return on investment?

2. PRODUCT OVERVIEW

The FDA Approved 500 TPH Gold Mining Washing Plant is a heavyduty, modular scrubbing and classification system engineered for highvolume alluvial and eluvial deposits. It is designed to meet stringent requirements for materials handling in sensitive environments where regulatory compliance is critical.

Operational Workflow:
1. Feed & PreScreening: Runofmine material is fed via conveyor into a robust hopper with a grizzly section to remove oversize rocks (>75mm).
2. Intensive Scrubbing: Material enters the central rotating drum scrubber, where lifters cascade ore for maximum attrition, breaking down clays and dissolving agglomerates.
3. HighPressure Spray Washing: Internally mounted spray bars deliver highimpact water jets to disintegrate stubborn material coatings.
4. Efficient Screening & Classification: Scrubbed material passes over modular screen panels (typically 10mm), with undersize reporting to downstream recovery (sluices, centrifuges) and oversize conveyed to waste.

Application Scope: Ideal for largescale alluvial gold operations, placer mining projects, and heavy mineral sands beneficiation requiring highvolume feed processing.

Limitations: Not suitable for hard rock primary crushing or processing of highly cemented gravels without prior size reduction. Performance is dependent on consistent feed characteristics and adequate water supply.

3. CORE FEATURES

HeavyDuty Drum Scrubber | Technical Basis: Highlengthtodiameter ratio with internal helical lifters | Operational Benefit: Provides extended retention time (23 minutes) and optimal cascading action for complete clay dissolution | ROI Impact: Increases overall gold recovery by liberating locked fines; reduces reprocessing costs.

Modular Screen Section | Technical Basis: Boltin, interchangeable polyurethane or steel screen panels | Operational Benefit: Enables rapid panel changeout (<2 hours) for different feed conditions or screen sizes; minimizes downtime | ROI Impact: Reduces maintenance windows by up to 60% compared to weldedscreen units.

FDACompliant Material Contact Surfaces | Technical Basis: Critical wetted parts constructed from FDAlisted grades of stainless steel or certified polymers | Operational Benefit: Ensures compliance for operations in environmentally sensitive areas or where water discharge regulations are strict | ROI Impact: Mitigates regulatory risk and potential project shutdowns; facilitates permitting.

Centralized Greasing & Monitoring System | Technical Basis: Automated lube points on all major bearings with condition monitoring ports | Operational Benefit: Ensures proper bearing lubrication in dusty conditions; allows for predictive maintenance scheduling | ROI Impact: Extends component life by over 40%, preventing catastrophic bearing failures and associated downtime.

Variable Frequency Drive (VFD) Control | Technical Basis: PLCcontrolled drive on scrubber motor | Operational Benefit: Allows operators to finetune rotational speed (RPM) based on feed viscosity and clay content for optimal processing | ROI Impact: Optimizes power consumption and reduces shear on mechanical components under variable loads.

Integrated Water Recycling Manifold | Technical Basis: Lowvolume, highpressure spray bars fed from a closedloop settling pond system | Operational Benefit: Maximizes washing efficiency while minimizing fresh water intake—typically below 100 gallons per ton processed | ROI Impact: Drastically reduces water procurement and pumping costs, crucial for remote sites.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (400 TPH Plant) | Our 500 TPH Gold Mining Washing Plant Solution | Advantage (% Improvement) |
| : | : | : | : |
| Nominal Throughput Capacity (Clayrich Feed) | 400 TPH (rated), ~320 TPH (actual with clays) | 500 TPH (rated), ~460 TPH (actual with clays) | +25% Rated / +44% Effective |
| Average Power Consumption per Ton Processed| 0.85 kW/tonne| 0.72 kW/tonne| 15% Energy Use |
| Mean Time Between Failure (Critical Bearings)| ~1,200 hours| >2,000 hours| +67% Reliability |
| Clay Disintegration Efficiency (>90% passing 2mm)| ~75% yield| >92% yield| +23% Liberation |
| Total Water Consumption per Ton Processed| ~150 gallons/tonne| <100 gallons/tonne| 33% Water Use |

5. TECHNICAL SPECIFICATIONS

Model Designation: GW500FDA
Rated Capacity: 500 Tons Per Hour (dry feed)
Scrubber Drum Dimensions: 3.5m Diameter x 9m Length
Drive Power: Main Scrubber Motor – 250 kW (335 HP), VFD Controlled
Feed Size Maximum: Up to 250mm (after grizzly removal)
Screen Deck Configuration: Single deck, modular panels; standard aperture size configurable from 6mm to 20mm.
Construction Materials: Drum Shell – Abrasionresistant steel; Liner/Wear Parts – AR400 Steel; Material Contact Surfaces – FDAlisted SS304 or equivalent polymers.
Water Supply Requirement: System pressure >60 PSI at flow rate of up to 1,200 GPM.
Plant Footprint (LxW): Approximately 22m x 8m (excluding feed/discharge conveyors).
Operating Temperature Range: 20°C to +50°C (4°F to 122°F).
Regulatory Compliance: Designed to meet FDA Title 21 CFR for material contact surfaces; general structural design complies with ISO 8525 standards for mining machinery.

6. APPLICATION SCENARIOS

LargeScale Alluvial Gold Operation, West Africa

Challenge: A major operator needed to upgrade their existing 350 TPH washing circuit that was bottlenecking their dredging output. High clay content caused severe screen blinding and reduced effective capacity by 30%.
Solution: Implementation of the GW500FDA as the primary scrubbing module ahead of existing gravity circuits.
Results: Achieved sustained throughput of 480 TPH of difficult claybound gravels. Clay liberation efficiency improved from 70% to 94%, leading directly to a measured 8% increase in overall gold recovery within the plant flow sheet within the first quarter.

Placer Mine Expansion Project, Yukon Territory

Challenge: A new project required an environmentally compliant solution capable of processing 500 TPH of frozen pay gravel within a strict permitting framework that governed materials contact surfaces.
Solution: Installation of the GW500FDA configured with steam injection manifolds at the feed hopper and FDAcompliant internal components.
Results: The plant met all regulatory requirements for permitting approval. The robust scrubbing action efficiently processed challenging frozen aggregates while the lowwater design reduced thermal input needs, keeping operational costs within budget projections.

7. COMMERCIAL CONSIDERATIONS

The GW500FDA Gold Mining Washing Plant is offered in three primary configurations:

1. Base Unit Tier ($850k $1M):
Includes core scrubber module with VFD drive,
Standard steel screen panels,
Basic walkways,
Motor control center,
Oneyear parts warranty

2. Optimized Package Tier ($1M $1 .25M):
FDAcompliant contact surfaces,
Polyurethane modular screen panels,
Integrated centralized greasing system,
Extended walkways & safety guarding,
18month warranty

3 . Turnkey Plant Integration Tier ($1 .5M+):
Customengineered feed & discharge conveyors matched t o your site layout ,
Complete water recycling & settling pond design package ,
Onsite commissioning supervision ,
Twoyear comprehensive warranty including labor

Optional Features:
• Steam / Hot Water Injection Kits f o r coldclimate operation .
• Onboard diesel generator power pack .
• Advanced trommel screen section f o r more precise sizing .
• Remote monitoring & diagnostics telemetry .

Service Packages:
Annual inspection contracts , guaranteed spare parts kits , an d operator training programs are available separately .

Financing Options:
Equipment leasing structures , projectbased financing through partner institutions , an d tradein programs f o r qualifying existing equipment can b e arranged .

8 . FAQ

Q : Is this washing plant compatible wit h our existing sluice boxes an d concentrators ?
A : Yes . The unit i s designed as a dropin scrubbing an d classification module . I t produces clean , sized gravel an d slurry output that can b e directed t o most downstream gravity recovery systems . Our engineering team can review your specific layout t o ensure compatibility .

Q : What i s the typical installation an d commissioning timeline ?
A : For th e Optimized Package Tier delivered t o prepared site foundations , mechanical installation typically requires 1014 days . Electrical tiein an d wet commissioning require an additional 57 days , assuming utilities are available .

Q : How does th e "FDA Approved" designation impact our operation ?
A : This designation specifically refers t o th e materials used i n surfaces contacting process media . I t demonstrates compliance wit h stringent health an d environmental standards , which i s often critical f o r obtaining operating permits i n jurisdictions wit h strict environmental controls .

Q : What are th e ongoing operational costs we should budget f o r ?
A : Primary costs include power (~0 .72 kW/ton), wear liners /screen panels (dependent o n abrasiveness ; typically replaced annually ), an d routine bearing lubrication . Field data indicates total operating cost excluding labor ranges between $0 .85$1 .25 per ton processed .

Q : Can th e plant handle variations i n feed material , such as sudden increases i n clay content ?
A : Yes . Th e Variable Frequency Drive allows operators t o adjust drum speed t o increase attrition during highclay periods . Th e modular screen design also allows f o r quick changes t o larger apertures if temporary relief from blinding i s needed .

Q : What kind of operator training i s provided ?
A : Comprehensive training covering normal operation , shutdown procedures , routine maintenance checks , an d basic troubleshooting i s provided during commissioning . Training manuals an d video guides are supplied .

Q : Are spare parts readily available ?
A : We maintain a global network of certified parts depots stocking critical wear items like lifters , screen panels ,an d bearing assemblies . Guaranteed dispatch of critical spares within 24 hours i s available under our premium service contracts