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MEI Online: Commodities: Metallic Ores: Zinc: Latest News: August 19th 2003

:: Metals from AMD  

AIM-listed junior exploration company Cambridge Mineral Resources plc plans to produce zinc and copper from acid mine-drainage (AMD) produced from existing and abandoned mines in southern Spain.

The company will focus on the Iberian Pyrite Belt where a report prepared for the company by the University of Reading indicates that the metal content of some streams of AMD can be up to 90kg per tonne of water. Of this contained metal, up to 7 kg comprises copper and zinc.

Cambridge says that conceptual studies of selected sites indicate the economic viability of an operation to recover copper as metal, and zinc either as metal or sulphate product.

The company believes that recoveries of up to 98% can be achieved and, when commissioned, the envisaged plant could generate revenues in excess of US$2 million annually.

Cambridge has commenced discussions with the relevant Spanish authorities and is entering into exclusivity agreements with the suppliers of the selected technologies for use in the project. Pilot-plant trials are scheduled for later this year on the selected sites, including the San Telmo concession which is controlled by Cambridge.



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