Alluvial Gold Ore Production Line and Process Solution

I. Overview

Alluvial gold ore is an important gold resource, and the alluvial gold beneficiation process is relatively simple, which mainly recovers gold through physical methods such as screening, gravity separation, and selection. However, since the content of gold in alluvial gold ore is usually low, how to improve the recovery rate, reduce energy consumption, and ensure economic benefits has become the key of alluvial gold ore beneficiation process. We provide highly efficient, energy-saving, large capacity alluvial gold production line and process solutions for alluvial gold mines of different sizes to ensure that the return on investment is maximized.

Second, alluvial gold ore dressing process flow

1. Pre-treatment stage

• Feeding: use vibrating feeder or belt conveyor to transport the ore evenly to avoid clogging.

• Sieving and removing impurities:

  • Tumbler screen (or rotary scrubber): screen out large waste rock >6mm to prevent damage to subsequent equipment.

  • Double-deck vibrating screen (optional): further screen fine-grained ore to improve sorting efficiency.

• Ore washing and desliming:

  • Spiral washing machine or hydraulic washing hopper removes clay and impurities and improves the looseness of the ore sand.

2. Gravity concentrator roughing (core stage)

Jig machine (coarse grain gold)

• Advantage:

  • Large processing capacity, suitable for continuous production of medium and large alluvial gold mines

  • Excellent recovery of coarse-grained gold and nugget gold

  • Stable operation and simple maintenance

  • Can handle ore with high mud content

Centrifugal concentrator (fine-grained gold)

• • Advantage:

    • Outstanding recovery effect for fine-grained gold and flake gold

    • High degree of automation, can realize continuous discharge

    • Small footprint, suitable for space-constrained processing plants

    • Especially suitable for processing fine-grained gold in jigger tailings

• Spiral chute

  • Advantage:

    • No power design, only rely on pulp self-flow sorting, very low energy consumption

    • Simple structure, low maintenance cost, suitable for small and medium-sized processing plants.

    • The recovery effect of flake gold is better than that of jigger.

  Drum chute

  • Advantage:

    • Simple process

    • The stroke and frequency can be flexibly adjusted to adapt to different pulp characteristics.

    • Low investment cost and quick effect

3. Selection and purification

• Shaking table:

  • Further purification of jigger concentrate, concentrate grade up to 1000-2000g/t.

  • The processing capacity is low (0.5-2t/h), suitable for high-grade concentrate production.

• Amalgamation method:

  • Amalgamating cylinder: internal amalgamating equipment, recovery rate >95%, suitable for free gold purification.

  • Environmental requirements: need to be closed design, with activated carbon adsorption of mercury vapor.

4. Tailings treatment

• Thickener: increase the concentration of tailings (60%-70%).

• Filter press: dewatered tailings water content <15%, easy to stockpile or backfill.

III. Selection and configuration of key equipment for alluvial gold production line

IV. Comparison of alluvial gold beneficiation process programs (selected according to the characteristics of the ore)

Program 1: High-efficiency recovery type (applicable to medium and high-grade alluvial gold ore)

• Flow: trommel → jigger → shaking table → mercury mixing cylinder

• Characteristics: high grade concentrate, suitable for ore bodies with coarse gold grains.

Option 2: Large processing capacity type (applicable to low-grade alluvial gold ore)

• Flow: trommel → jigger → centrifuge → tailings dewatering

• Characteristics: processing capacity of 100t/h or more, taking into account the recovery rate and cost.

Program 3: environmental protection type (applicable to areas with strict environmental requirements)

• Flow: trommel screen → jigger → shaker → magnetic separation (alternative to mercury amalgamation)

• Characteristics: Mercury-free process, in line with green mine standards.

Option 4: Simple type (applicable to mining areas with thin layers but high gold content)

• Flow: trommel screen → drum chute → viscous gold chute → shaking table

• Characteristics: the simplest alluvial gold ore gold beneficiation method, less investment and quick results.

For more alluvial gold production line and process solutions, please contact us!

V. Technical and economic indicators and cases

Case: a riverbed alluvial gold ore (grade 0.8g/t)

• Equipment Configuration:

  • Vibrating feeder

  • Trommel screen

  • Jigger + centrifuge combined sorting

  • Shaking table + mercury mixing cylinder purification

• Operation effect:

  • Recovery rate: 88.5%

  • Energy consumption: 2.8kWh/t ore

  • Tailings water content: 14%

Six, alluvial gold beneficiation process advantages

✔ High recovery rate: jigging + centrifugal joint process, covering 0.02-30mm gold particles.
✔ Low energy consumption: equipment matching optimization, low energy consumption.
✔ Modularized design: can be flexibly expanded according to the output.
✔ Environmental compliance: tailings dry discharge, mercury vapor control and other technical guarantees.

The core of alluvial gold ore beneficiation lies in "high efficiency roughing + fine sweeping + environmental protection purification". We can provide customized alluvial gold production line and process solutions according to the ore size, grade and environmental requirements, from small mobile processing plant to large stationary alluvial gold production line, to ensure maximum economic benefits.

We have hundreds of alluvial gold production line project experience, if you need specific alluvial gold production line solution or alluvial gold beneficiation technology consulting, please contact us, we will provide you with customized alluvial gold beneficiation solutions and quotations suitable for you!