Gold ore heap leaching production line and process solutions

Gold ore heap leaching process for gold extraction - low grade gold ore beneficiation production line solution

I. Overview of gold ore heap leaching process

Heap leaching is a cost-effective gold extraction technology, especially suitable for the development of low-grade gold ore. Gold ore heap leaching production line and process solutions by stacking the crushed ore, using spray leaching method to dissolve the gold, and then use activated carbon adsorption or zinc replacement to recover the gold, has the advantages of low investment, low cost, simple operation and so on.

Second, gold ore heap leaching process and production line equipment details

1. Ore preparation system

• Crushing section:

  • Jaw crusher for coarse crushing

  • Cone crusher for medium crushing

  • Target size: 30-50mm

• Granulation treatment (optional):

  • Add binder to improve permeability

  • Suitable for ores with high fines content

2. Yard construction system

• Bottom mat laying:

  • Adopt HDPE impermeable membrane

  • Composite seepage control structure design

  • Slope is controlled at 1-3%.

• Pile construction method:

  • Slope type pile construction (permanent yard)

  • Multi-layer stacking

  • Specialized stacking equipment to ensure the uniformity of the pile

3. Spray leaching system

• Spraying pipe network:

  • Uniform distribution of rotating spray nozzles

  • Adjustable spray intensity

• Leaching liquid management:

  • Sodium cyanide concentration: 0.05-0.1 percent

  • pH control: 10-11 (lime adjustment)

  • Spraying intensity: 5-15L/h-m²

4. Precious liquid treatment system

• Precious liquid collection:

  • Precious liquid pool seepage-proof design

  • Solution filtration pretreatment

• Gold recovery process:

  • Activated carbon adsorption column (commonly used)

  • Zinc powder replacement (high grade solution)

5. Desorption electrolysis system

• Gold-carrying carbon treatment:

  • High temperature and high pressure desorption process

  • Desorption rate >98%

• Electrolytic deposition:

  • Obtain high purity gold slime

  • Purity of cathodic gold above 99

Third, gold ore heap leachingprocess technology advantages

1. Outstanding economic benefits:

   • The investment is only 1/3-1/5 of the traditional process

   • Significantly reduced production costs

   • Applicable to low-grade gold ores

2. Strong adaptability:

   • Low requirements for terrain

   • Complex ores can be processed

   • Flexible and adjustable scale

3. Environmentally controllable:

   • Closed solution circulation

   • Perfect seepage control system

   • Harmless treatment of tailings

4. Easy operation:

   • Simple process flow

   • High degree of automation

   • Low maintenance cost

Fourth, the key equipment configuration of gold ore heap leaching production line

V. Production example analysis of gold ore heap leaching process

A low grade gold ore heap leaching project:

• Raw ore grade: 1.2g/t

• Yard size: 500,000 tons

• Process flow:

  • Two-stage crushing to -40mm

  • HDPE impermeable bottom mat

  • Spray leaching for 30 days

  • Activated carbon adsorption recovery

• Operation index:

  • Production cost: less than 200 yuan/g

  • Investment payback period: 1.5 years

Sixth, technical service support

Provide a full range of gold ore heap leaching production line and process solutions:

1. Pilot study:

   • Column leaching test

   • Permeability testing

2. Engineering Design:

   • Landfill planning and design

   • Design of impermeable systems

3. Production Support:

   • Operational training

   • Process Optimization

4. Environmental protection program:

   • Tailings treatment

   • Wastewater treatment

VII. Suggestions on process selection for gold heap leaching method

1. Applicable conditions:

   • Low gold grade or small development ore body

   • Good permeability of ore

   • Climate suitable area

2. Investment Recommendation:

   • Suitable for small and medium-sized mines with limited capital

For customized gold ore heap leaching production line and process solution or technical consultation, please contact our professional team to provide you with gold ore heap leaching method solution and quotation.