氯化钾间歇冷却结晶生长规律及粒度控制实验研究
收稿日期: 2019-02-13
网络出版日期: 2020-06-15
基金资助
青海科技厅科技支撑计划重大项目(2015-GX-109A);教育部科研创新团队培育计划([2013]373);天津市高等学校创新团队培养计划(TD12-5004)
Experimental research on growth and crystal size control of potassium chloride in batch cooling crystallization
Received date: 2019-02-13
Online published: 2020-06-15
李志强 , 杨立斌 , 沙作良 , 王彦飞 , 朱亮 , 赵晓昱 . 氯化钾间歇冷却结晶生长规律及粒度控制实验研究[J]. 无机盐工业, 2019 , 51(8) : 33 -36 . DOI: 10.11962/1006-4990.2018-0512
The crystal nucleation and growth of potassium chloride(KCl) in the batch cooling were investigated by focused beam reflectometry(FBRM).The effects of cooling rate on the supersaturation of KCl aqueous solution during cooling,and the relationship between the relevant conditions of seed addition(such as the seed particle size and the addition dosage) and the particle size of the KCl crystal product were studied.Meanwhile,"seed" was produced by crystallization stimulated by direct cooling and was controlled its growth to achieve the purpose of controlling the crystal product size.Results showed that the low supersaturation generated in the programmed cooling process was not easy to cause explosive nucleation under the condition of adding seed,and the addition dosage of seed determined the deviation of the average particle size of the crystal product from the ideal growth model.In addition,the cooling rate was a key factor in determining the particle size of the“seed” obtained by cooling-stimulated crystallization.
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