大型萃取箱研制成功

CSuccessful Development of An Laree-size Extraction Box

介绍大型萃取箱的结构，性能，研制经过和使用效果及其对我国发展投资省、生产成本低的湿法炼铜的深远影响。

The author has introduced a large - size extraction box, reported its structure charscteristics, development process and production effect, and pointed out its profound significance in wet smelting copper with smaller investment and lower production cost in China.