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随着国民经济的发展,现代化工业生产消耗的各种金属材料日益增多,相应地要产生各种黑色、有色、稀贵金属废料。这些废金属是重要的生产原料,是国家的宝贵资源。充分回收、合理利用这些资源,是国家开源节流的一大经济措施,可获得相当的效益。利用再生金属作生产的原材料比用原生金属投资少、见效快,可节约能源和矿源,减少环境污染。国外称
With the development of national economy, various kinds of metal materials consumed by modern industrial production are increasing day by day, correspondingly, various kinds of black, non-ferrous and rare-precious metal wastes are produced. These scrap metal is an important raw material for production and a valuable resource for the country. Full recovery and reasonable utilization of these resources is a major economic measure for increasing revenue and reducing expenditure, which can achieve considerable benefits. The use of recycled metal for the production of raw materials than the use of primary metal less investment, quick, can save energy and mineral resources and reduce environmental pollution. Foreign said