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Extractive Metallurgy of Copper 4th ed. W. Davenport et. al. (2002) Episode 2

Tham khảo tài liệu 'extractive metallurgy of copper 4th ed. w. davenport et. al. (2002) episode 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | CHAPTER 2 Production And Use Metallic copper occurs occasionally in nature. For this reason it was known to man about 7000 B.c Killick 2002 . Its early uses were in jewelry utensils tools and weapons. Its use increased gradually over the years then dramatically in the 20th century with mass adoption of electricity Fig. 2.1 . Year Fig. 2.1. World mine production of copper in the 19 h and 20lh centuries Butts. 1954 USGS 2002b . Copper is an excellent conductor of electricity and heat. It resists corrosion. It is easily fabricated into wire pipe sheet etc. and easily joined. Electrical conductivity thermal conductivity and corrosion resistance are its most exploited properties Table 2.1. 17 18 Extractive Metallurgy of Copper Table 2.1. Usage of copper by exploited property Copper Development Association 2002 and by application Noranda 2002 . Electrical conductivity is the property most exploited. Building construction and electrical electronic products are the largest applications. Exploited property of total use Electrical conductivity 61 Corrosion resistance 20 Thermal conductivity 11 Mechanical and structural properties 6 Aesthetics 2 Application of total use Building construction 40 Electrical and electronic products 25 Industrial machinery and equipment 14 Transportation equipment 11 Consumer goods 10 This chapter discusses production and use of copper around the world. It gives production use and price statistics - and identifies and locates the world s principal copper-producing plants. It shows that Chile is by far the world s largest producer of copper Table 2.3. 2.1 Locations of Copper Deposits World mine production of copper is dominated by the western mountain region of South America. Nearly half of the world s mined copper originates in this region. The remaining production is scattered around the world Table 2.3. 2.2 Location of Extraction Plants The usual first stage of copper extraction is beneficiation of ore 1 Cu to high-grade 30 Cu concentrate. This