Sectors / Mining & mine water

Mining & mine water

Salt control in bioleaching

Keep the metals, lose the salt.

The problem

In bioleaching, salt builds up in the recirculating solution and has to be controlled without losing copper, or the iron the bacteria reuse.

Benefits

  • Keeps salinity where the process needs it
  • Retains valuable copper and reusable iron
  • Reduces bleed and make-up volumes

Application

Treats a bleed of the raffinate, removing sodium chloride and returning the solution, with its iron, to the heap. Suited to heap and tank bioleaching of low and medium-grade copper ores such as chalcopyrite.

Where it sits in the site

Salt controlSodium chloride outbleediron retainedHeap leachCopper recoveryRaffinate

Danu Water product

Scroll sideways to see the whole process.

Shown as a standalone job for clarity. Where and how much water is taken and returned is designed around each site, and one unit may do several jobs. Powered by Danu Water's adaptive electromembrane separation.

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