JXSC provided a successful 20TPH Alluvial Gold Processing plant in Romania in 2022. We designed the processing plant flowchart and plant layout drawing along with the corresponding foundation construction drawings in accordance with the client’s requirements. We provided a complete set of plant machines. As the client possesses its own engineering team responsible for the factory’s construction, our engineers were not required to provide on-site services.
EPCS
Engineering, Procurement & Construction Services
Case Study: Alluvial Gold Processing Plant Project
Project Overview
Minerals
Alluvial Gold Ore
Capacity
20 TPH
Feed Size
≤4 mm
Location
Romania
Year
2022
Project Process
Solutions & Process
We successfully delivered a customized alluvial gold processing solution for our Romanian client in 2022, providing specialized equipment to efficiently recover gold particles from 0- 4 mm construction sand materials.
The client, a road construction company that unexpectedly discovered alluvial gold in their sand deposits, required a compact, add-on solution to integrate with their existing infrastructure without disrupting construction operations. Our solution was designed for simple operation, high recovery rates, and seamless integration with their current setup.
Key highlights of this project include:
- Plug-and-play design that integrates with existing construction equipment
- Two-stage gold recovery system ensuring maximum yield
- Compact footprint suitable for mobile operations
- Low water consumption and environmentally conscious design
- Minimal operational training required
This successful implementation showcases our expertise in delivering targeted mineral recovery solutions for unconventional mining scenarios.
Process Design Solution
Based on the client’s specific requirements and material characteristics, we developed an optimized processing flow:
1. Feed System (Integrated with Existing Setup)
The solution leverages the client’s current road construction equipment:
- Material is pre-screened through their existing vibration screen (0- 4 mm fraction)
- Automatic transfer of 0- 4 mm gold-bearing sand to our gravity processing system
- Designed for continuous operation matching construction workflow
2. Primary Gravity Concentration
The core of our add-on solution:
Centrifugal Concentrator: Processes 0- 4 mm feed material at high G-forces
- Captures medium-to-fine gold particles (typically >50 microns)
- Continuous operation with automatic concentrate discharge
- Low water requirements (3-5m³/hour)
Tails from the concentrator report to secondary recovery
3. Secondary Gravity Recovery
Ensuring maximum gold capture:
Sluice Box System: Processes centrifugal concentrator tailings
- Optimized riffle design for fine gold retention
- Modular sections for easy cleaning and maintenance
- Mat drop-bottom for simplified gold collection
Combined recovery rate >90% for free-milling gold
4. Final Concentration & Refining
Two-stage upgrading process:
Vibrating Screen Classification:
- Screens combined concentrates at 2mm cut point
- -2mm material reports to shaking table
- +2mm material goes to manual panning
Shaking Table:
- Processes -2mm fraction for final upgrading
- Produces smelt-ready gold concentrate (>90% Au)
- Adjustable stroke and deck angle for optimal recovery
Manual Panning:
- Hand processing of +2mm concentrates
- Simple, effective method for coarse gold recovery
5. Water & Tailings Management
- Closed-circuit water recycling system
- Compact settling ponds for water clarification
- Environmentally benign tailings suitable for construction backfill
- Optional tailings repurposing for construction materials
This optimized flow achieves:
- Minimal footprint addition to existing operations
- Processing capacity matching construction output
- Gold recovery down to the 30- 50 micron range
- Simple operation requiring no specialized chemical knowledge
- Easy maintenance with locally available parts
Note: The complete system was supplied with detailed installation drawings and operational manuals, enabling the client’s in-house engineering team to successfully implement the solution without requiring our on-site assistance.
Customer Questions & Our Answers
1. What is the purpose of the centrifugal concentrator in this setup?
The centrifugal concentrator serves as the primary gold recovery unit, designed to:
- Process 0- 4 mm gold-bearing sand directly from your vibration screen
- Achieve high gold preconcentration through enhanced gravitational forces
- Continuously separate gold particles as small as 50 microns
- Operate with automated concentrate discharge for minimal supervision
2. Why do we need both a shaking table and manual panning?
Our two-stage refining system ensures maximum gold recovery:
Shaking Table: Handles -2mm concentrates with precision separation, producing commercial-grade gold (90%+ purity) through adjustable stratifying action
Manual Panning: Processes +2mm materials where coarse gold nuggets are more effectively recovered through traditional methods.
Bonus Benefit: This dual approach allows for flexible operation based on your material characteristics.
3. What gold recovery performance can we expect?
Under standard operating conditions:
System Capability: 85-90% recovery rate for free-milling gold
Key Influencing Factors:
- Gold particle size distribution
- Feed grade consistency
- Proper water flow regulation
Optimization Tip: We recommend periodic sampling to verify performance and adjust operating parameters accordingly
4. How is water management handled in this system?
The plant is designed for efficient water usage:
Total Consumption: ~50m³/hour (about 12,000GPH)
Primary Water Users:
- Centrifugal concentrator backwash (35m³/h)
- Shaking table/sluice box feed water (15m³/h)
Water Recycling: Includes settling ponds for clarifying process water before recirculation
Pro Tip: Rainfall collection can supplement up to 30% of water needs during wet seasons
5. Can this system be expanded for higher throughput?
This modular design allows for:
Capacity Upgrade Paths:
- Parallel installation of additional centrifugal units
- Upsizing to industrial-scale shaking tables
- Adding trommel scrubbers for clay-rich materials
Future-Ready Features:
- Pre-engineered connection points
- Scalable water management system
- Compatible with our full range of upgrades
Equipment In This Project
Related Cases
We are a leading provider of innovative and efficient mining equipment and solutions. With years of experience in the industry, we specialize in designing and manufacturing high-quality machines tailored for various mineral processing needs, including gold, diamond, copper, tin, manganese, chrome, titanium, and other ore separations. Our commitment to technology and customer satisfaction drives us to deliver customized solutions that enhance productivity and ensure environmentally sustainable practices. Explore our extensive portfolio of successful case studies and discover how JXSC can transform your mining operations, helping you maximize your profitability while minimizing your ecological footprint. Choose Us—where technology meets efficiency in the world of mining!
