Coal Age

MAR 2013

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VDMA Coal and Mineral Processing Technology: Long-term R&D; Foundations Crushing, grinding and separation are key areas of mineral processing technology where long-term research and development has kept German companies among the world market leaders. They have been at the forefront in developing new crushing concepts, such as high-pressure rolls crushers, and in the fine-grinding technology needed for processing raw materials into feed for specalized mineral-based products. There strength lies in developing long-standing mineral-separation technologies such as jigging to the current state-of-the-art, successfully applying concepts that were originally designed for coal or industrial minerals, for instance, to a whole new range of commodities such as iron ore and base metals. Neither should one forget that this type of technology can also be used to recover valuable fractions from slags and from recycling, as can sorting techniques that are based on color, particle shape and X-ray absorption properties. Environmental issues are often of major concern for mineral processing operations, with stringent quality requirements for water discharge in terms of sediment, chemical and metal contents. One company that recently joined the VDMA's mining branch, EnviroChemie GmbH, specializes in supplying energy-efficient technologies for treating wastewater, water recycling and resource recovery. The company reports that one of its recent projects involved building a fully automated 450 m3/h wastewater treatment plant at the former Wismut uranium mine in eastern Germany. Uranium, radium, arsenic and manganese contained in water from the mine workings is cleaned out using sequential precipitation, flocculation, sedimentation and filtration, with the sludge created being mechanically dewatered and immobilized before disposal. During 2012, allmineral Aufberietungstechnik GmbH & Co. KG was integrated into the Hazemag group following Schmidt, Kranz's acquisition of a majority holding in the company. Its recent success in winning orders for its jig and other technologies from the Western Australian iron ore industry led it to open a new office in Perth during the year. Jigging applications have not been confined to iron ore, however, and during 2013 CuDeco is scheduled to commission 10 alljigs® at its Rocklands copper mine-development project in Queensland. These will be used initially to recover native copper from crushed run-of-mine ore. Four coarse jigs will each have a capaci- An alljig® plant supplied by allmineral for iron-ore beneficiation at Whyalla, South Australia. VDMA 32 VDMA MINING SUPPLEMENT • 2013

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