Welsh company Maelgwyn Mineral Services is a regular sponsor of MEI's comminution and flotation conferences, but Hydrometallurgy '26 provides the opportunity of promoting its Aachen high shear reactors. These are predominantly used in gold leaching for pre-oxygenation to increase gold recoveries via enhanced kinetics and removal of passivating films. There are now more than 100 of these highly efficient mass transfer devices operating globally. The Aachen reactors have also found application in the treatment of refractory gold flotation concentrates as a lower cost alternative to roasting or pressure oxidation using Maelgwyn’s patented Leachox process.
Capstone Copper is a producer of copper cathode and copper concentrates, with three of its assets producing copper cathodes from heap leach and SX/EW facilities. It has various ongoing hydrometallurgical development projects targeting, among others, cobalt byproduct production at Mantoverde and Santo Domingo in Chile, copper production via halide leaching of historic mill and leach tails at Mantos Blancos in Chile, and concentrate leaching at various operating sites.
Capstone has also agreed to sponsor AI in Mineral Processing '26, which immediately precedes Hydrometallurgy '26. joining Promet101. A big thanks to these two companies, as Capstone is now committed to sponsorship of all MEI Conferences in this and next year, and Promet101 six of these eight upcoming events (see also posting of 22 January 2026).
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