论文部分内容阅读
随着湿法冶金的不断发展,海绵铋熔铸技术就越来越引起人们的重视了。目前国内的海绵铋熔铸工艺,大致分两类:一类是对铋品位高、杂质少的优质海绵铋,其熔铸工艺通常是将一定量的烧碱置于熔铸锅内熔融,然后把湿海绵铋投入熔融碱液中,再经逐步升温熔融转化,最后捞去浮渣,铋液铸锭成粗铋(云南锡业公司第三冶炼厂的现行生产工艺);另一类是铋品位低、其它杂质元素较多、但含量不算高的海绵铋,对这种海绵铋,有的单位采用配人苏打、炭粉粗炼(如白银有色金属公司)。
With the continuous development of hydrometallurgy, sponge bismuth casting technology has drawn more and more attention. At present, the domestic sponge bismuth casting process, roughly divided into two categories: one is on the bismuth grade, low quality impurities sponge bismuth, the casting process is usually a certain amount of caustic soda pot placed in the melting, and then the wet sponge bismuth Into the molten lye, and then gradually warming melt conversion, and finally fishing to the scum, bismuth ingot into crude bismuth (Yunnan Tin Company smelter’s current production process); the other is bismuth grade is low, the other Some of the more impurity elements, but the content is not high sponge bismuth, bismuth sponge, and some units with soda, carbon smelting (such as silver non-ferrous metals company).