Growth kinetics of calcium fluoride at high supersaturation in a fluidized bed reactor

被引：33
|
作者：
Jiang, K. [1 ]
Zhou, K. G. [1 ]
Yang, Y. C. [1 ]
Du, H. [1 ]
机构：
[1] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China
来源：
ENVIRONMENTAL TECHNOLOGY | 2014年 / 35卷 / 01期
关键词：
crystallization; calcium fluoride; growth kinetics; high supersaturation; aggregation; PARTICLE GROWTH; RECOVERY; REMOVAL; PRECIPITATION; PHOSPHATE; PRODUCT; WATER;
D O I：
10.1080/09593330.2013.811542
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Crystallization process in a fluidized bed reactor (FBR) has been regarded as an environmentally friendly technology for the removal and recovery of fluoride from industrial wastewater. The growth kinetics of calcium fluoride at high supersaturation was studied for design, control, and operation of an FBR. The main variables, including supersaturation, superficial velocity, pH value, and particle size of seed that influenced the crystal growth were investigated. Then, a growth model was used to predict the linear growth rate of calcium fluoride at a high influent concentration of fluoride. The pressure difference in the FBR was used as a feature to characterize the growth rate of calcium fluoride. The aggregation and adsorption between seeds and fine particles were proven to be a possible mechanism for growth of calcium fluoride.
引用
收藏
页码：82 / 88
页数：7
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