Heap Leaching

Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from ore via a series of chemical reactions that absorb specific minerals and then re-separate them after their division from other earth materials. Oxygen plays a critical role in enabling these reactions; however, efficiently delivering oxygen into the leaching process is challenging. Moleaer's proprietary gas-injection technology overcomes this challenge by plugging directly into the leaching irrigation system. In many cases, the generators can be added without the need for an additional pump. This simple plug-and-play solution combined with the ability of Moleaer's nanobubbles to significantly increase and maintain elevated dissolved oxygen (DO) levels in leaching solutions provides miners with the opportunity to increase metal recovery or lower their leaching costs.

Increased Dissolved Oxygen

A key aspect to the heap-leaching process is oxidation, or the reaction of the ore with oxygen to dissolve and extract metals or minerals. The more oxygen present in this process, the more efficient it is. Moleaer's system increases DO well beyond what is achieved with traditional methods because of the unique properties of nanobubbles. Nanobubbles don't float and remain suspended in solution until they dissolve. With an oxygen-transfer efficiency of over 90%, Moleaer's system can rapidly elevate, fine-tune, and maintain specific DO levels, even up to full saturation.


Many mining facilities are large and intricate operations with significant capital costs. Shutting down a facility to integrate a new technology is simply not feasible, which can lead to a reluctance to adopt new technologies. Moleaer's nanobubble generator is easy to integrate by simply plugging into a pipe before the leaching process, reducing the impact to the operation and rapidly providing a significant economic benefit to the heap-leaching process.

Efficient Extraction

Mining operations are typically large-scale, with heap-leaching drip systems that can be hundreds of feet long. With operations of this size, delivering high levels of DO at the end of the drip line can be challenging. Nanobubbles do not float to the surface and pop, instead remaining in solution for months on end. Due to this longevity in water, nanobubbles can easily survive to the end of the drip line, ensuring maximum extraction efficiency throughout the entire heap.