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| 铁粉置换沉淀海绵铋的动力学研究 | |
| 引用本文： | 吴绍华,刘春艳,兰尧中.铁粉置换沉淀海绵铋的动力学研究[J].湿法冶金,2007,26(3):139-142. |
| 作者姓名： | 吴绍华 刘春艳 兰尧中 |
| 作者单位： | 1. 昆明物理研究所,云南,昆明,650223 2. 曲靖市珠街二中,云南,曲靖,655009 3. 云南大学,材料科学与工程系,云南,昆明,650092 |
| 摘 要： | 从动力学角度研究了铋湿法冶金中铁粉置换沉淀海绵铋的化学反应机理，探讨了Bi^3＋初始浓度、Cl^-浓度、温度、溶液pH及搅拌速率等因素对铋置换率的影响及动力学数学模型。通过测定不同温度条件下的表观反应速度常数（点），求得浸出反应活化能为14．61kJ／mol。试验结果表明，置换反应的所有动力学数据服从一级反应速率规律，置换过程符合扩散控制机理。 |
| 关 键 词： | 回收铁粉 海绵铋 置换 动力学 |
| 文章编号： | 1009-2617（2007）03-0139-04 |
| 收稿时间： | 2007-04-27 |
| 修稿时间： | 2007年4月27日 |
Kinetic Study on Cementation of Bismuth From Solution Using Iron Powder |
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| WU Shao-hua,LIU Chun-yan,LAN Yao-zhong.Kinetic Study on Cementation of Bismuth From Solution Using Iron Powder[J].Hydrometallurgy of China,2007,26(3):139-142. | |
| Authors: | WU Shao-hua LIU Chun-yan LAN Yao-zhong |
| Abstract: | The cementation of bismuth by iron powder from solutions has been studied.The influence of several parameters,such as initial concentration of bismuth ions,temperature,concentration of chlorine ions,pH value and stirring speed,on the course of reaction were investigated.The apparent activation energy of the reaction estimated is 14.61kJ/mol.This low value suggests that the bismuth precipitation process is controlled by diffusion through the mass transfer boundary layer.The reaction was found to follow first-order kinetics. |
| Keywords: | recycling iron powder sponge bismuth cementation kinetics |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |