Mintek Global Activities

Gold * Evaluation and design of recovery circuits, carbon and resin adsorption, elution, electrowinning. Leach optimisation and heap leach bio-leaching amenability. * Cyanide speciation monitoring, online cyanide measurement and control, cyanide destruction. Assistance with ICMI gap or full certification audits. * Minfurn TM technology for granular activated carbon regeneration. * Minataur TM all-hydrometallurgical gold refining process. * New industrial uses for goldcatalysis, biomedicine, and nanotechnology.

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Industrial Minerals & Diamonds * Physical beneficiation - comminution, flotation, gravity, dense media, electrostatic and magnetic separation, and optical sorting. * Kimberlite indicator mineral investigations. Alluvial diamond provenance studies. PGMs * Design and optimisation of integrated comminution and flotation circuits. * ConRoast smelting technology for high-chromium low-sulphur PGM materials. * Catalyst development for automotive, fuel cell, and industrial applications. * Novel PGM-containing alloys, and powder metallurgical processes. *

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Uranium * Ambient, pressure and heap leaching, solvent extraction, fixed bed and countercurrent (NIMCIX) ion exchange, resin-in-pulp, and ADU precipitation. * Mintek is registered as a uranium testwork facility with South Africa's National Nuclear Regulator (NNR) and the Department of Mineral Resources. * 3 Ferrous Metals * DC arc smelting processes for chromite, ilmenite, nickel laterites, magnetite, magnesium metal production, and metal recovery from slags and dusts. * Iron ore beneficiation. * Materials characterisation (physical, mechanical and corrosion properties), and failure investigations. *

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* * Process Control Strategies * Advanced process control and optimisation strategies for milling, flotation, and gold leaching circuits, and sumberged-arc furnaces. * Online cyanide measurement and control. * Heap leach operator guidance software and in-heap instrumentation. Equipment & Technology * MinfurnTM regeneration furnace for activated carbon in the gold processing, water treatment, and food industries. * Gold electrowinning cell. mintek global activities mintek annual report 2012 Base Metals * Bioleaching of copper, nickel, and polymetallic concentrates. Heap bioleaching of low-grade chalcopyrite-bearing materials. * Integrated circuit design for metal recovery and purification by leaching/heap leaching, precipitation, ion exchange, and SX/EW. **

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DC arc furnace. * AtomijetTM atomiser for base and precious metals. * SAVMINTM process for acid mine drainage purification. Acid-base accounting. Economic and Regional Studies * Regional commodity-based mineral economic studies. * Resource-based technology strategies. * Sustainable development studies.

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