一、前言 我国生产重有色金属已有几千年的历史,是世界上发现、使用重有色金属最早的国家之一。但由于长期的封建统治和帝国主义掠夺,重有色冶金工业非常落后,1949年重有色金属的产量不足12000吨。解放后国家十分重视发展重有色冶金工业,不仅在三年恢复时期修复和扩建了旧有企业,而且在第一个五年计划期间以及三年困难时期之后 I. Preface Our country has been producing heavy non-ferrous metals for thousands of years and is one of the earliest countries in the world to find and use heavy non-ferrous metals. However, due to the prolonged feudal rule and the plundering of imperialism, the heavy non-ferrous metallurgy industry was very backward. In 1949, the output of non-ferrous metals was less than 12,000 tons. After the liberation of the state attaches great importance to the development of non-ferrous metallurgical industry, not only in the three-year recovery period to repair and expand the old enterprises, and during the first five-year plan and three-year difficult period