alluvial gold ore beneficiation process

Alluvial Gold Ore Beneficiation Process Solution

I. Overview

As an important gold resource, alluvial gold ore beneficiation mainly relies on physical methods such as screening, re-election and selection, which is characterized by relatively simple process and low investment cost. However, alluvial gold ores generally have problems such as low gold grade, uneven distribution of gold particles, and easy to mud, etc. Therefore, realizing high recovery, low energy consumption and large processing capacity is the core challenge of alluvial gold beneficiation process design.

This alluvial gold beneficiation solution aims to provide highly efficient, energy-saving, reliable and economically maximized customized alluvial gold production line and process solutions for alluvial gold deposits of different sizes and ore characteristics.

II. Alluvial Gold Beneficiation Core Processes

Alluvial gold beneficiation process can be divided into four core stages: pre-treatment, re-election and roughing, purification and tailing treatment.

1. Pre-treatment stage: Screening and removing impurities and washing and desliming.

• Uniform feeding: vibrating feeder or belt conveyor is used to ensure that the materials are continuously and evenly fed into the production line to avoid equipment blockage.

• Sieving and removing impurities:

  • Trommel screen/cylinder washer: as primary screening equipment, it can effectively screen out large gravel and waste materials and protect the subsequent equipment from damage.

  • Double-deck vibrating screen (optional): if you need to further improve the sorting efficiency, you can add a double-deck vibrating screen for finer grading of materials.

2. Re-election roughing stage (core recovery link)
According to the distribution of gold particle size, the following high-efficiency re-election equipment is used in combination:

• Jigger:

  • Advantage: large processing capacity, excellent recovery rate for coarse-grained gold and nugget gold, stable operation, wear-resistant, and better adaptability to mud content.

  • Applicable: coarse-grained gold (>0.5mm) of medium and large alluvial gold mines Main recovery equipment.

• Centrifugal concentrator:

  • Advantage: Utilizing centrifugal force field, it has outstanding effect on the recovery of fine-grained gold (0.02-1mm) and flake gold; high degree of automation, continuous ore discharge; small footprint.

  • Application: often used as sweeping equipment to process jigger tailings, or as the main processing equipment to process fine-grained gold-based ore.

• Spiral chute:

  • Advantages: no power consumption, relying on pulp self-flow sorting; simple structure, very low maintenance cost; good recovery effect for flake gold.

  • Applicable: small and medium-sized processing plant or projects with limited investment budget.

• Drum chute:

  • Advantages: lowest investment cost, quick results; can adapt to different slurry conditions by adjusting the stroke and frequency.

  • Applicable: decentralized mining area with high gold content and thin ore layer or small-scale gold panning.

3. Selection and purification stage

• Shaking bed:

  • To purify the crude concentrate produced by jigger or centrifuge, utilizing the differential movement of bed surface to realize precise sorting, and high purity concentrate can be obtained.

• Amalgamation:

  • Mercury amalgamation cylinder: Highly efficient internal amalgamation equipment with >95% recovery of free gold.

  • Environmental requirements: must be fully enclosed design and equipped with activated carbon adsorption device or mercury vapor recovery system to ensure operational safety and environmental compliance.

4. Tailings treatment stage

• Thickening: Use thickeners to increase the concentration of tailings slurry to 60%-70%.

• Dewatering: use filter press to dewater the concentrated tailings to produce dry pile tailings with water content <15%, which can be safely stored or used for underground backfilling, realizing environmentally friendly tailings treatment.

Comparison of Customized Alluvial Gold Ore Beneficiation Process Solutions (For more customized solutions, please contact us! )

Typical cases

Case: a riverbed alluvial gold mining project

• Ore characteristics: grade 0.8g/t, uneven distribution of gold particles, containing a small amount of clay.

• Equipment configuration: vibrating feeder + trommel screen + jigger + centrifugal concentrator + shaking table + amalgamating cylinder + thickener/filter press.

V. Our core advantages

• High recovery rate: The combined process of jigging and centrifugation realizes efficient recovery of gold particles in the whole particle size range from 0.02mm to 30mm.

• Low operating cost: through the optimized matching of equipment and the application of non-powered equipment (such as spiral chute), energy consumption and maintenance cost are significantly reduced.

• Modular design: The production line adopts modular structure, which can be flexibly expanded or reduced according to the demand of resources and production, reducing the initial investment risk.

The core of the alluvial gold ore beneficiation process lies in the combination of "high efficiency roughing + fine sweeping". With hundreds of successful alluvial gold mining projects, we are able to provide you with the most economical and reliable customized alluvial gold beneficiation solutions based on your ore characteristics (particle size, grade, mud content), production capacity requirements and local environmental policies.

To get the specific alluvial gold beneficiation program design, equipment selection advice and detailed quotation for your mine, please contact us now! Our expert team will provide you with professional technical support and consulting services.