简介概要

拜耳法铝酸钠溶液分解动力学

来源期刊:中国有色金属学报1998年第1期

论文作者:毕诗文 薛红 杨毅宏 陈万坤 王锡慧 刘铸战 姜小凯

文章页码:131 - 134

关键词:铝酸钠溶液 分解 晶种 活化能

Key words:sodium aluminate solution , precipitation , seed , activity energy

摘    要:讨论了温度和晶种粒度对铝酸钠溶液分解过程中晶体生长的影响,认为添加的晶种粒度对分解速率有很大的影响;晶种的粒度大时其 比表面积小, 分解速度慢; 晶种粒度小时其比表面积大, 分解速度快。 根据Misra提出的动力学方程求出了该分解条件下的活化能,并将晶种瞬时质量因子引入动力学方程,求 得的不同温度下分解速率常数能较好地符合阿仑尼乌斯公式。在分解过程中晶种的瞬时比表面积变化很小,可以忽略瞬时比表面积变化的影响。

Abstract: The effects of temperature and seed size on crystal growth were discussed during the precipitation of sodium aluminate. It was discovered that the seed size has a significant effect on the precipitation speed. While seed size is large and its specific surface area is small, the precipitation speed is slow; while seed size is small and its specific surface area is large, the precipitation speed is fast. The activity energy was obtained according to the dynamics equation advanced by Misra. By considering the change of seed in the process of precipitation, the precipitation speed constant k was got and it can conform to the Arrhenius formula better.

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