Remember that only 0.67% of the ore is copper. The copper minerals and waste rock are separated at the mill using froth flotation. The copper ore slurry from the grinding mills is mixed with milk of lime to give a basic pH, pine oil to make bubbles, an alcohol to strengthen the bubbles, and a collector chemical called potassium amyl xanthate .
The flotation machine is used for the separation of the nonferrous black metal as well as the separation of the non metallic materials such as the coal fluor...
Flowsheet for treatment of Copper Sulfide ores rich inminerals such as chalcopyrite with gold and silver as well as arsenopyrite. The above flowsheet is designed for the treatment by flotation of copper as chalcopyrite with gold and silver values. The ore, ranging from 60 65% silica, with pyrite, arsenopyrite, and calcite with 3 to 4% copper.
The flotation of native copper ores is nearly always preceded by gravity concentration in jigs and tables not only because the combined process is more economical as regards costs, but also because the copper often occurs as large grains which flatten out during grinding and cannot be broken to a size small enough for flotation.
Float copper is considerably denser than most other rocks and minerals carried by the glacier. After it was deposited among other less dense unconsolidated gravel and sand, action of water preferentially removes the lighter gravel and sand thereby concentrating the float copper. a This process results in