open cast gold mining in south africaquot

  • Cost control and margin protection in the South

    Nearly all cost categories in the South African mining and ... Chamber of Mines of South Africa EAU 1Crisis in SA gold ... mechanized and open cast mines to 50% ...

  • African Sun Mining, opencast mining contractor

    African Sun Mining, ... Excitement as Wits-style gold is discovered in iron-ore hub, ... South Africas mining sector was abuzz with talk about this years ...

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    • Open-pit mining Wikipedia

      Typical open cut grades. Gold is generally extracted in open-pit mines at 1 to 5 ppm (parts per million) but in certain cases, 0.75 ppm gold is economical. This was achieved by bulk heap leaching at the Peak Hill mine in western New South Wales, near Dubbo, Australia. Nickel, generally as laterite, is extracted via open-pit down to 0.2%.