AZUD
Leaching

What is heap leaching?

Heap leaching is a modern, efficient, and economical solution for recovering valuable metals from low-grade ore. Through this process, large volumes of crushed ore are piled up and sprayed with chemical solutions that dissolve the metals. These are then recovered in pure form through hydrometallurgical processes such as electro-winning or precipitation.

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Benefits

Key benefits

Key benefits

  • Low investment and operating costs: no mills or complex plants are required.
  • Recovery of resources from marginal deposits.
  • Lower environmental impact: no tailings, reduced water and energy consumption.
  • Quick installation, modular and adaptable to different environments.
  • High scalability: ideal for both pilot projects and large operations.

How does the process work?

1. The ore is crushed and agglomerated.
2. It is piled on an impermeable base designed to protect the environment.
3. The leaching solution is applied using irrigation systems.
4. The leachate dissolves the metals and is collected at the base.
5. The enriched solution is processed to recover high-purity metals.

Advantages over other traditional methods

  • No tailings → lower risk of environmental accidents.
  • Simple infrastructure → shorter start-up time.
  • Less sensitivity to metal price volatility.
  • Extended mine life → possibility of processing previously discarded material.

 

Sustainability and best practices

  • Reuse of solutions → reduces chemical consumption and costs.
  • Bioleaching → microorganisms replace aggressive chemicals.
  • Coatings and sealing of piles → prevent leaks.
  • Continuous process monitoring → greater efficiency and safety.
  • Responsible heap closure → long-term environmental commitment.

Heap leaching represents the ideal combination of profitability, efficiency, and sustainability. If you are evaluating options to optimize your operations or take advantage of currently unviable resources, this technology may be the answer.

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