COPPER EXTRACTION: EXTRACTION OF COPPER FROM COPPER PYRITE Principle Copper is extracted mainly from its copper pyrite ore by means of the self-reduction process. Following are the steps involved in the extraction: 1. Crushing : The big lumps of copper pyrite ore is crushed in two smaller pieces by using a Jaw crusher. 2. Pulverzition : The crushed ore is further crushed and changed into powder form by using a Stamp mill. 3. Concentration : The concentration is done by Froth Floatation Method. In this method, the mixture of water and pine oil is taken on the vessel in which the powder ore from the pulverization process is mixed. The sulphide ore is wetted by pine oil and the impurities are wetted by water and settle down at the bottom of the vessel. 4. Roasting : It is done in the Reverberatory furnace by the supply of hot air. In this process, the moisture is removed and the volatile impurities are removed as an oxide. In this process, the sulphide ore is converted into oxide ore by m...