Preparation of high-purity bismuth by sulphur deleadization in vacuum distillation

• 作者: 何则强 刘文萍 戴永年 熊利芝 麻成金
• 来源期刊: 中国有色金属学会会刊（英文版）
• 学科: 工学
• 关键词: vacuum distillation sulphur deleadization refined bismuth high-purity bismuth
• 年，卷（期）: 2004,（6）
• 页码范围: 1210-1214
• 页数: 5页
• 分类号: TF121
• 语种: 英文

摘要

The feasibility of separation of impurities in refined bismuth and sulphur deleadization with vacuum distillation was studied theoretically. Experimental studies on sulphur deleadization were carried out under vacuum.The influences of amount of sulphur, distillation temperature, vacuum degree and distillation time on deleadization were investigated and an optimal technical condition was achieved. The content of lead in refined bismuth can be decreased from 30 μg/g to 0.21 μg/g, which has reached the level of "5N" high-purity bismuth. Other impurities in refined bismuth can be also removed effectively under certain conditions.