文献类型：期刊文献

中文题名：饲料级磷酸氢钙结晶过程中团聚的研究

英文题名：Study on agglomeration in crystallization process of feed-grade calcium hydrogen phosphate

作者：张鑫[1];钟本和[1];孙玉柱[2];于建国[2]

机构：[1]四川大学化学工程学院,四川成都610065;[2]华东理工大学资源与环境工程学院

年份：2015

卷号：47

期号：5

起止页码：38

中文期刊名：无机盐工业

外文期刊名：Inorganic Chemicals Industry

收录：CSTPCD;;北大核心:【北大核心2014】；

语种：中文

中文关键词：饲料级磷酸氢钙;团聚;结晶;团聚体尺寸模型

外文关键词：feed-grade calcium hydrogen phosphate ; agglomeration ; crystallization ; agglomeration-size model

摘要：在反应结晶过程中,一般过饱和度很大,很容易形成大量细小颗粒,这些小颗粒相互作用形成团聚体,会影响最后产品的粒度分布、纯度、晶体形貌、堆密度等参数.饲料级磷酸氢钙生产过程中极易形成团聚体,通过探索团聚体形成的pH范围,对团聚体形成的原因做了分析,并研究了中和条件对团聚形成的影响.结果表明,形成团聚体的pH范围为2.82～3.60.此外,提高反应温度、增加搅拌速度均对团聚体有减缓效果.实验最后建立了磷酸氢钙团聚尺寸模型.
Supersaturation is generally quite large in the process of reactive crystallization, a large number of tiny particles will emerge.Agglomeration will be formed because of the interaction between these tiny particles, affecting parameters, such as crystal size distribution, purity, crystal morphology, and tap density, of final product.Agglomeration can be easily found in the preparation of feed-grade calcium hydrogen phosphate.The pH range of agglomeration formed and the forming reasons were explored and analyzed.Some neutralization conditions affecting calcium hydrogen phosphate agglomeration were studied. Results showed that agglomeration formed at pH of 2.82-3.60, and raising temperature and stirring speed will reduce agglomeration.Finally, an agglomeration-size model was established.