Bioleaching and phytomining are increasingly used to extract copper from low grade ores . The traditional method of extraction is to heat the copper sulfide. Copper sulfide gives copper and sulfur dioxide during
Copper is purified by electrolysis. In this process copper is transferred from an impure anode to the cathode of an electrolytic cell. The insoluble impurities fall to the bottom. The copper produced by this process is 99.99% pure copper.
Copper Smelting: Smelting is a metallurgy technique to extract base metals from their ores with the help of heat and a chemical reducing agent. . Copper Smelting means that the concentrated ore is heated strongly with silicon dioxide , calcium carbonate and air in a furnace. The major steps in the extraction of copper are
Extracting copper from other ores Copper can be extracted from non sulphide ores by a different process involving three separate stages: Reaction of the ore with a dilute acid such as dilute sulphuric acid to produce a very dilute copper sulphate solution.
Open pit: 90% of ore is mined by this method. Ores near the surface can be quarried after removal of the surface layers. The ore is treated with dilute sulfuric acid. This trickles slowly through the ore dissolving copper to form copper sulfate.
June 10, 2020
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