论文部分内容阅读
铜具有良好的物理、机械性质,它的应用范围日益广泛,在国民经济中占有特殊地位。世界上三分之二以上的铜用于电线、电缆和电器设备;其次用于建筑和交通运输以及各种热交换器;铜用以生产多种合金,主要是黄铜、青铜、铜镍合金等,加工成各类机器部件,使用效果甚佳。不少国家还用作货币,其用量也很可观。铜既是一种常用金属,许多国家都充分发挥自己的资源、技术优势,大力发展铜的生产。工业发达国家铜的产量一般为钢产量的1.5％左右。目前,世界上号称“五大产铜国”的美国、苏联、智利、加拿大、赞比亚,其产量占世
Copper has a good physical and mechanical properties, its scope of application is more extensive, occupies a special position in the national economy. More than two-thirds of the world’s copper is used for wires, cables and electrical equipment; secondly for construction and transport and various heat exchangers; and copper is used for the production of various alloys, mainly brass, bronze, copper-nickel alloys And so on, processed into various types of machine parts, the use of very good results. Many countries also used as currency, the amount is also very impressive. Copper is a commonly used metal, and many countries have given full play to their own resources and technological advantages to develop copper production. Copper output in industrialized countries is generally about 1.5% of the steel output. At present, the United States, the Soviet Union, Chile, Canada and Zambia, which are known as the “five major copper producing countries” in the world, account for the world’s output