In collaboration with Goldfields, the pioneers of the Biological Oxidation process, Mixtec has led the development of specialized impellers designed specifically for the biohydrometallurgical treatment of refractory gold ores and concentrates. This innovative approach, a cornerstone of modern gold extraction technology, leverages biological processes to prepare ores for more efficient cyanidation.

The Biological Oxidation process presents unique challenges, notably the corrosive and abrasive nature of the slurry within the reactors. Traditional materials like rubber-lined or austenitic stainless steels fall short under these conditions. Mixtec’s solution is a selection of lean duplex, duplex, or super duplex steels, chosen for their resilience against the specific acidity and temperature demands of each project.

A critical hurdle in Biological Oxidation applications is the risk of impeller flooding, caused by the introduction of large air volumes into the slurry. Mixtec’s response is our advanced gas-handling impeller technology, which performs reliably in these environments by ensuring optimal air dispersion without compromising the biological process.

Our mixing technology is the result of decades of research, development, and field testing in biological leaching systems. Designed to deliver excellent solids suspension, effective heat transfer, and efficient gas dispersion, our impellers minimise shear forces to protect the biological integrity of the process. This focus on performance and protection has made Mixtec a trusted partner in some of the world’s largest Biological Oxidation plants.

Through innovation and collaboration with industry leaders, Mixtec continues to set new benchmarks in the treatment of refractory gold ores. Our tailored solutions for Biological Oxidation reflect our dedication to solving the industry’s toughest challenges and helping clients achieve superior gold recovery.