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The Rocana Copper-Drilling Deposit is buried in the eastern edge of the Enkana syncline that is close to the complex fold of the northwest. The vein is about 14 kilometers long and the total ore reserves are 125 million tons. The ore contains 2.36% copper. The main copper minerals in the deep ore of the deposit are chalcopyrite, porphyrite, chalcopyrite and sulphur-copper-cobalt. The surface is mainly malachite, chrysamma, copper-bearing manganese and mica. ;
2 isolation - flotation process
The plant processed refractory copper ore and started production in 1965. It is the first industrial-scale manufacturer to adopt this process. The ore comes from the open pit mine in Area E. The current mine supply is 200 tons/day, the original mine contains 4.5% copper, and the design capacity is 400 tons/day. The process of the separation plant is as follows: the ore after grinding is heated to 300 ° C in a coal-fired ore- fired roaster, then enters the separation chamber where salt and coal are added to produce HCI and Na 2 SiO 3 , and HCI diffuses into the mineral particles. The gas is formed into a copper-containing chloride, and several reactions occur simultaneously on the surface of the coal particles, including reduction of the copper-containing chloride into metallic copper. The separated charge is quenched with water and copper is recovered by a general flotation method. The salt consumption is 5 kg/ton and the coal consumption is 10 kg/ton. The flotation index of the isolated product is 4.66% copper in the original ore, 29.3% copper in the concentrate, 0.72% copper in the tailings, and 87.2% copper recovery. In 1970, it was transferred to formal production and became a subsidiary workshop of the Rocana mine.
Rocana two-stage segregation process (Zambia)
. â‘ Overview rhokana (Rokana) operating subsidiaries are: underground and open pit mines, rhokana processing plant, copper smelter, cobalt smelter (1979 annual output of 2000 tons of cobalt metal, drill an annual output of 4000 tons 1982) and Sulfuric acid plant (annual production of 250,000 tons).