Study on Crystallization Kinetics of Barium Sulfate in Wet-process Phosphoric Acid

Jiang Lihong, Liu Zhonghua, Wang Yaming, Lin Qingyou
(Faculty of Biology and Chemical Engineering, Kunming University of Science and Technology, Kunming 650224)

Abstract The crystallization kinetics of barium sulfate in wet-process phosphoric acid and the effects of Mg2+, Fe3+, Al3+ on crystallization were investigated. The relationship between nucleation rate and growth rate of barium sulfate in wet-process phosphoric acid was presented. Fe3+, Al3+ inhibit the crystal growth process, but Mg2+ promote it. The coexistence of impurities inhibits the crystal growth process.
Key words Barium sulfate, Crystallization kinetics, Wet-process phosphoric acid Impurity

湿法磷酸中硫酸钡的结晶动力学

蒋丽红 刘中华 王亚明 林庆友
(昆明理工大学生物及化学工程学院 昆明 650224)

摘要 研究了硫酸钡在湿法磷酸中的结晶动力学及主要杂质Mg2＋、Fe3+、Al3+的影响，得到硫酸钡在湿法磷酸介质中的成核速率与晶体生长速率的关联式；Fe3+、Al3+对硫酸钡晶体生长有抑制作用，而Mg2＋能促进其生长，几种杂质共存的综合作用是抑制晶体生长。
关键词 硫酸钡 结晶动力学 湿法磷酸 杂质

蒋丽红 女，35岁，副教授，从事化学工程及精细化工研究工作。
云南省教委科研基金资助项目(9812079)
2003-11-21收稿，2004-02-27接受

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