Si/F/K/Na杂质对硫酸钙结晶过程的影响

doi:10.12034/j.issn.1009-606X.217389

过程工程学报 ›› 2018, Vol. 18 ›› Issue (4): 815-820.DOI: 10.12034/j.issn.1009-606X.217389

Si/F/K/Na杂质对硫酸钙结晶过程的影响

李绪1,2，朱干宇3，宫小康1，李少鹏3，刘兵兵1，李会泉3,4*

1. 宜都兴发化工有限公司，湖北宜都 443311
2. 湖北兴发化工集团股份有限公司，湖北宜昌 443007
3. 中国科学院过程工程研究所绿色过程工程实验室，湿法冶金清洁生产技术国家工程实验室，北京 100190
4. 中国科学院大学化学院，北京 100049

收稿日期:2017-11-15 修回日期:2018-01-05 出版日期:2018-08-22 发布日期:2018-08-15
通讯作者: 李会泉 hqli@home.ipe.ac.cn
基金资助:
湿法磷酸过程杂质赋存形式及结晶动力学研究;内蒙古自治区科技计划项目

Effects of Si/F/K/Na impurities on the crystallization of calcium sulfate

Xu LI1,2, Ganyu ZHU3, Xiaokang GONG1, Shaopeng LI3, Bingbing LIU1, Huiquan LI3,4*

1. Yidu Xingfa Chemical Co., Ltd., Yidu, Hubei 443311, China
2. Hubei Xingfa Chemical Group Co., Ltd., Yichang, Hubei 443007, China
3. Key Lab of Green Process and Engineering, National Engineering Lab for Hydrometallurgical Cleaner Production Technology,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
4. School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2017-11-15 Revised:2018-01-05 Online:2018-08-22 Published:2018-08-15
Contact: LI Hui-quan hqli@home.ipe.ac.cn

摘要/Abstract

摘要： 考察了湿法磷酸生产过程中Si, F, K和Na等杂质对CaSO4结晶过程的影响规律. 结果表明，两种碱金属对CaSO4结晶有不同作用，K有利于CaSO4晶体生长，而Na含量增加则会抑制CaSO4团聚；不同形式的K, Si和F对CaSO4结晶的作用不同，SiO2对CaSO4粒径影响不大，但会使其形貌不规则，H2SiF6会造成CaSO4晶体分散，而K2SiF6有利于CaSO4晶体生长.

关键词: 结晶, 硫酸钙, 杂质, 湿法磷酸

Abstract: The effects of impurities such as Si, F, K and Na on the crystallization process of calcium sulfate in wet-process phosphoric acid were investigated. The results showed that two types of alkali metals had different effects on the crystallization of calcium sulfate. The addition of K was beneficial for the growth and agglomeration of the crystals, and the increase of Na content inhibited the agglomeration of calcium sulfate. The particle size was barely affected by the amount of silica except the irregular shape, and the addition of H2SiF6 can lead to the diversion of the particles. K2SiF6 had a synergistic effect on the particles to improve the growth of calcium sulfate crystals.

Key words: crystallization, calcium sulfate, impurity, wet-process phosphoric acid

李绪朱干宇宫小康李少鹏刘兵兵李会泉. Si/F/K/Na杂质对硫酸钙结晶过程的影响[J]. 过程工程学报, 2018, 18(4): 815-820.

Xu LI Ganyu ZHU Xiaokang GONG Shaopeng LI Bingbing LIU Huiquan LI. Effects of Si/F/K/Na impurities on the crystallization of calcium sulfate[J]. Chin. J. Process Eng., 2018, 18(4): 815-820.

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Si/F/K/Na杂质对硫酸钙结晶过程的影响

Effects of Si/F/K/Na impurities on the crystallization of calcium sulfate

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