When leaching precious metal concentrates generated from gravity concentration circuits, it is crucial to use a leach reactor that can maximize your recoveries. The Sepro Leach Reactor provides a fully-automated process that can recover over 99% of the target mineral, making it the perfect reactor for gold and silver recovery operations.

About Gold Leaching

Gold leaching follows the Elsner Equation: 4 Au(s) + 8 NaCN(aq) + O2(g) + 2 H2O(l) -> 4 Na[Au(CN)2](aq) + 4 NaOH(aq). Cyanide concentrations of around 60ppm (parts per million) are added to slurry mixtures to dissolve the gold in a standard cyanidation circuit. For gravity concentrate with very high gold concentrations, intensive cyanidation (20,000 ppm) is used.

Due to the limited amount of oxygen dissolved in the slurry, operators often add sparging oxygen gas or air by adding peroxide (H2O2); the target dissolved oxygen concentration is 15-20mg/L. Other technologies use heat to drive this reaction forward, but Sepro uses direct agitation to ensure efficient gas, solid, and liquid interaction in the intensive leaching vessel.

If you are adding an intensive leach reactor to your silver or gold recovery operation, Sepro’s reactors offer numerous advantages over competing products.

Smaller Equipment and Footprint

Sepro’s Leach Reactor has a smaller footprint than most of our competitors. Not only do you get 99% target mineral recovery, but you will also have more space available for your operation.

Lower Capital Costs

Our leach reactor’s fast leach kinetics can lower the capital costs of your operation and increase your profitability. Not only do our reactors recover more than our competitors, but they do it with a shorter cycle time so smaller units can process the same concentrate volume.

Higher Recoveries and Lower Reagent Consumption 

Sepro’s Leach Reactor provides impressive recovery rates of over 99% and consumes less reagent than competing reactors because of more efficient slurry mixing. 

If you are thinking about adding a leach reactor to your gold recovery operation, our team is available to answer any questions you may have. For more about the benefits of installing a Sepro Leach Reactor, be sure to view our case study about its performance at Atlantic Gold’s Moose River Project.