Jiaozuo Zhongxin Heavy Industrial Machinery Co.,Ltd.
Review turnkey mineral processing and gold recovery plant installations engineered by Zhongxin Heavy. Detailed case studies cover gold CIP/CIL cyanidation lines, copper ore flotation circuits, iron ore magnetic separation, and gravity concentration systems—complete with process flowsheets, equipment configurations, and verified mineral recovery rates.
Jiaozuo Zhongxin Heavy Industry’s alluvial gold processing plant is engineered specifically for the highly efficient, cost-effective processing of riverbed gold, placer gold deposits, and alluvial washery ores. By integrating heavy-duty scrubbing, high-efficiency screening, and advanced gravity concentration, our custom production lines maximize free gold recovery—capturing even sub-millimeter fine gold particles—without using harmful chemical reagents.
Configured with heavy-duty rotary trommel scrubbers, vibrating screens, mineral jig concentrators, and gold shaking tables, our eco-friendly solutions cater to small-scale operations as well as industrial mining plants with capacities up to 300 TPH. Zhongxin Heavy ensures maximum profitability and operational efficiency for demanding placer gold deposits across Latin America and global markets.
Technical Specifications of Alluvial Gold Washing Plant
| Parameter | Specification |
| Plant Capacity | 20 – 300 TPH (Tons Per Hour / Customizable & Modular) |
| Gold Recovery Rate | Exceeding 95% for free milling gold (coarse nuggets & fine gold) |
| Beneficiation Method | 100% Eco-Friendly Gravity Separation (Cyanide & Mercury-Free) |
| Core Equipment Package | Rotary Trommel Scrubber + Mineral Jig / Centrifugal Gold Concentrator + Shaking Table |
| Target Raw Materials | Riverbed alluvial deposits, clay-heavy placer gold, gold-bearing gravels & sands |
High-Efficiency Alluvial Gold Beneficiation Process
The processing of alluvial and placer gold deposits requires an efficient physical liberation and gravity separation strategy to maximize the recovery of both coarse gold nuggets and sub-millimeter fine gold particles. Our turnkey gold washing plant integrates three high-efficiency process stages:
1.Disintegration, Scrubbing & Clay Desliming
Run-of-mine (ROM) gravels are fed into a heavy-duty Rotary Trommel Scrubber (Drum Washer). Equipped with high-pressure internal water jets and heavy breaker plates, the trommel scrubber thoroughly breaks down sticky clay matrices, liberating trapped free gold particles from gravel and silt.
2.Screening & Size Classification
The trommel screen classifies the washed slurry into distinct size fractions. Oversized barren rocks (+20 mm or +50 mm) are immediately discharged via a tailings stacking conveyor to optimize plant efficiency. The gold-rich fine fraction (-12 mm or -6 mm) passes directly to the gravity concentration circuit.
3.Multi-Stage Gravity Concentration (Rougher & Cleaner)
Primary Concentration (Roughing): High-g Centrifugal Gold Concentrators (Knelson / Knelson-type) or Hydraulic Mineral Jigs process the screened slurry at high throughput to capture coarse, medium, and fine free gold particles rapidly.
Secondary Concentration (Cleaning): The primary gold concentrate is fed to high-precision Gold Shaking Tables (Concentrating Tables) to achieve high-purity gold concentrates (85%–95% purity), ready for direct induction furnace smelting into Gold Doré bars.
1. Alluvial Gold Ore Disintegration, Scrubbing & Screening
Sticky Clay Disintegration & Scrubbing
Many alluvial gold deposits contain tough, cemented mud lumps—some larger than 100 mm—often bound to gravels and pebbles. If these clay balls are not thoroughly disintegrated in time, they will be discarded as waste rocks during screening, carrying encapsulated gold particles with them and leading to severe gold loss.
Heavy-duty Rotary Trommel Scrubbers use high-pressure water sparging and internal breaker lifters to fully homogenize and deslime clay-rich matrixes, ensuring 100% free gold liberation.
High-Efficiency Screening & Size Classification
Screening removes 20% to 40% of barren waste rocks (coarse gravels and cobbles) right at the front end, making it an indispensable stage in placer gold processing. Screening parameters are determined by the particle size distribution of the raw gold ore. Depending on ore washability, specialized equipment like Horizontal Vibrating Screens, Incline Vibrating Screens, Trommel Screens, and Rotary Drum Washers are deployed to achieve precise sizing.
2. Multi-Stage Gravity Separation Circuit Design
Because free gold in alluvial deposits spans a wide particle size spectrum, different gravity separation equipment operate within specific particle size limits. A high-recovery placer gold plant typically integrates a combined multi-stage gravity flowsheet:
High-Grade / Standard Placer Deposits: Deploys Mineral Jig Concentrators for primary roughing, followed by Gold Shaking Tables for secondary cleaning to produce high-purity gold concentrate.
Low-Grade Placer Deposits: Uses Sluice Boxes (Riffled Sluices) for low-cost primary roughing, Mineral Jigs for scavenging, and Shaking Tables for final cleaning.
Process Optimization Rule: A successful alluvial gold plant relies on the combined operation of multiple gravity devices. Customized metallurgical testing is strongly recommended to determine exact ore properties and design an optimal flowsheet.
3. Core Gravity Separation Equipment Comparison
| Equipment Type | Operating Mechanism | Particle Size Range | Key Process Advantage |
| Mineral Jig Concentrator (Roughing / Scavenging) | Stratifies mineral particles by specific gravity in vertical, pulsating water flows. High SG gold settles at the bottom. | 0.04 mm – 50 mm (Fine to coarse gold) | Large processing capacity, simple operation, high throughput roughing efficiency for liberated gold. |
| Gold Shaking Table (Cleaning / Finishing) | Uses differential reciprocating motion on an inclined bed surface to separate mineral bands in a thin water film. | 0.019 mm – 3 mm (Coarse/fine sand & slime) | Visible mineral band separation, highest concentration ratio in a single pass, produces direct-smelting concentrate. |
| Gold Sluice Box (Primary Roughing) | Separates minerals using a combination of inclined water flow, gravity, and riffle friction. Heavy gold deposits behind riffles. | Coarse nuggets & gravels | Zero power consumption, low CAPEX/OPEX, highly effective for low-grade placer gold primary roughing. |
Mineral Jig Concentrators (Sawtooth Wave Jigs):
Stratifies minerals based on density differentials (≥1.25). Capable of capturing fine gold down to 0.04 mm (325 mesh). Ideal for handling raw feed with high throughput, serving as the core roughing engine in placer gold lines.
Gold Shaking Tables (Concentrating Tables):
Categorized into Coarse Sand Beds (0.5–2.0 mm), Fine Sand Beds (0.074–0.5 mm), and Slime Beds (0.037–0.074 mm). Provides stable, highly visible separation of gold bands with exceptionally high enrichment ratios, allowing direct pouring into Gold Doré bars.
Gold Sluice Boxes (Riffle Sluices & Gold Rush Matting):
Leverages slurry velocity and riffle eddy currents to trap heavy gold particles while washing away lighter sand and gravel. Excellent for low-grade operations or remote field plants requiring minimal infrastructure.
1.High Recovery Rate for Flake & Fine Gold (Up to 98%):
The dual synergy of high-g Centrifugal Concentrators and high-precision Gold Shaking Tables effectively prevents fine, flaky, and flour gold from being lost in the tailings stream, ensuring maximum overall gold recovery.
2.100% Eco-Friendly & Chemical-Free Process:
Operating strictly via water density and gravitational forces, our separation technology completely eliminates the use of hazardous mercury and cyanide. This environmentally compliant process streamlines environmental permitting and compliance across Latin America and global mining jurisdictions.
3.Modular & Portable Skid-Mounted Design:
Equipment is mounted on heavy-duty steel skids or portable mobile chassis for fast deployment, easy assembly, and effortless relocation—ideal for remote jungle environments and tough riverbank mining sites.
4.Extreme Wear Resistance in Harsh Conditions:
Equipped with high-durability polyurethane (PU) screen meshes in the trommel scrubber and heavy-duty anti-abrasion rubber liners, our plants resist extreme sand wear and significantly extend component operational lifespan.
5.Low Power & Water Consumption with Recycling Systems:
Integrated water clarification and recycling systems minimize raw water intake, allowing continuous, energy-efficient operations even in isolated mining camps with scarce water and power resources.
Why Choose Zhongxin Heavy Alluvial Gold Washing Plants?
| Feature | Zhongxin Heavy Solution | Traditional / Artisanal Mining |
| Fine Gold Recovery | Up to 98% (Recovers down to sub-millimeter particles) | 40% – 60% (High losses in fine/flaky gold) |
| Environmental Safety | 100% Chemical-Free (Zero Mercury / Cyanide) | High chemical pollution (Mercury amalgamation) |
| Mobility & Setup | Modular Skid / Mobile Chassis (Plug-and-Play) | Fixed concrete infrastructure (Hard to relocate) |
| Wear Life | Polyurethane Mesh + Anti-Wear Rubber Liners | Fast wear on steel plates and woven wire screens |
| Water Efficiency | Closed-Loop Water Recycling System | High raw water consumption & slurry discharge |
Crushing and mineral processing setups that actually handle hard rock, fines, and wet material. See our stationary, mobile, and modular lines for mining and aggregates.
This section is designed to address the most pressing inquiries customers may have regarding the daily operation, maintenance, product advantages, and after-sales service of our cone crushers. Our aim is to help you gain a comprehensive understanding of our overall capabilities and enable you to make informed decisions for your projects.
Choosing Zhongxin genuine wear parts reduces downtime and significantly boosts your mining operation's ROI.
We help clients develop maintenance plans to solve issues before wear affects production.
We offer customized parts for materials like granite or gold ore, increasing wear resistance by 30%.
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