Provided by Business Wire Fluor Achieves First Concentrate Production Milestone on Khoemacauâs Copper Silver Project in Botswana Fluor Corporation (NYSE: FLR) announced today that Khoemacau Copper Mining (Pty) Limited (Khoemacau) recently achieved first copper and silver concentrate production for its Starter Project near Toteng in Botswana. Fluor performed engineering, procurement and construction for Khoemacauâs Copper Silver Project in Botswana. See photo of the Boseto Processing Facility. (Photo: Business Wire) The project is in the Kalahari Copper Belt and is expected to produce an annual average of 62,000 metric tons of payable copper and 1.9 million ounces of payable silver in concentrate for more than 20 years.