Copper smelting technology

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Copper smelting technology has undergone a long process,copper powder ( FCu ), but so far the smelting of copper pyrometallurgical still dominated, with its output accounting for 85% of the world's copper output. 1) Fire is generally first copper smelting percentage or a few thousandths of the original ore,boron powder, by dressing up to 20-30%, as copper concentrate, in the smelting furnace,zinc oxide, reverberatory furnace, electric furnace or a flash furnace for-matting smelting, melting output matte (matte) and then were blown into the converter to Make blister,zinc oxide, and then in another reflection off the furnace after oxidation refining complex, or cast electrolytic anode plate, get up to grade 99.9% of copper. The process of short, strong adaptability and recovery of copper 95%, but the sulfur ore and blowing in the matting as sulfur dioxide gas emissions in two stages,silicon powder, easy recovery, easy to cause pollution. Law in recent years, such as silver, Noranda and France,zinc oxide, and Japan's Mitsubishi bath smelting and so on, gradually pyrometallurgical continuous, automation. 2) Modern hydrometallurgy have sulfuric acid roasting - leaching - electrowinning, leaching - extraction - electrowinning, leaching bacteria such as law, suitable for low-grade complex ore, copper oxide ore, scrap copper ore heap leaching, tank leaching selected or in situ leaching. Hydrometallurgical technology was gradually extended in this century is expected to reach 20% of total production, the introduction of hydrometallurgy to greatly reduce the cost of copper smelting

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