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Cobalt Recovery and Refining

Malachite Consulting has been involved with a number of projects and operations for the extraction, purification and production of LME deliverable cobalt metal. This experience includes pilot plant testwork, process design, due diligence, design reviews plus the commissioning and the operation of a cobalt refinery. More recently Malachite Consulting has undertaken work on the extraction of cobalt from sulphide and oxide ores, using a variety of metallurgical processing techniques,…

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Copper Gold Smelter & Refinery

Malachite Consulting has been providing technical advice for a major copper gold smelter and refinery which is to be constructed in Indonesia. The technical advice has included smelting technology reviews, selection of preferred smelting routes, process modelling using MetSim, downstream electrorefining of copper and precious metals refining. The project is advancing from early days scoping studies though to feasibility studies, with the aim to commence FEED engineering in 2018.

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Direct Reduction of Nickel Laterites

Malachite Consulting has undertaken testwork and engineering studies for the direct reduction of iron and nickel, from nickel laterites, in order to produce a high value product for sale. The process typically involves reducing the metal oxides in a rotary kiln, followed by cooling of the reduced product. The cooled product is then crushed and upgraded using magnetic separation, to remove the gangue material. Depending on the shipping and…

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