二、国外再生有色金属生产的概况及特点:目前世界各国再生有色金属的产量正在逐年增长。如果说,在本世纪上半叶,原生有色金属的冶金企业里是将有色金属废料与矿石、精矿一起处理的话,那么随着有色金属废料的增加,就出现了组织专门再生有色金属生产的必要性。为了保证再生有色金属冶金企业的原料供应,在苏联设 Second, the overview and characteristics of the non-ferrous metals production in foreign countries: The output of non-ferrous metals from renewable sources in the world is increasing year by year. If we say that in the first half of this century, the non-ferrous metallurgical industry was dealing with non-ferrous metal scrap with ore and concentrate, then with the increase of non-ferrous scrap, there appeared a series of organizations specializing in the production of non-ferrous metals necessity. In order to ensure the supply of raw materials for the regeneration of non-ferrous metal metallurgical enterprises, it was set up in the Soviet Union