The centerpiece of the Spence Copper Mine repair and expansion is a $2.46 billion concentrator plant that processes minerals from the mine by conventional flotation methods to produce copper and molybdenum concentrate. The new plant can process 95,000 tons of raw material daily, producing an annual output of 185,000 tons of copper (in concentrate) over the first 10 years of operation.
For the tailings dam, PENECRETE MORTAR sealed 60 m (200 feet) of cracks; PENETRON was applied to almost 5,000 m2 (5,980 yd2) of concrete surfaces; and Petreos, the ready-mix concrete supplier, treated about 10,000 m3 (13,000 yd3) of concrete mix with PENETRON ADMIX.
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