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| 石膏型卤水体系硫酸钙结晶过程研究 | |
| 引用本文： | 唐娜,张艳华,任成龙,蔡芳,王嘉宁,鞠兴文.石膏型卤水体系硫酸钙结晶过程研究[J].盐业与化工,2011,40(1). |
| 作者姓名： | 唐娜 张艳华 任成龙 蔡芳 王嘉宁 鞠兴文 |
| 作者单位： | 1. 天津科技大学,海洋科学与工程学院,天津,300457;天津市海洋资源与化学重点实验室,天津,300457 2. 天津科技大学,海洋科学与工程学院,天津,300457;中盐皓龙盐化有限公司,河南,平顶山,467000 3. 天津市朝日科贸有限公司,天津,300350 |
| 摘 要： | 石膏型卤水体系真空蒸发制备NaCl过程中,CaSO4.2H2O对NaCl产品的纯度影响较大。研究了石膏型卤水体系中CaSO4.2H2O的结晶过程。实验研究了搅拌速率、停留时间、晶种量、温度等条件对石膏型卤水体系二水硫酸钙结晶过程的影响。研究结果表明:晶体的粒度开始随搅拌速率的增大不断增大,当搅拌速率达250 r/min时,晶体粒度达到最大值77.24μm;晶体粒度同样开始时随停留时间的增大而增大,当停留时间为120 min时达到最大值,此时平均粒径为70.39μm。CaSO4.2H2O晶体粒度随晶种量的增加而减小;在40℃～70℃范围内,晶体粒度开始随温度的升高而增大,在60℃时达到最大值,此时晶体的平均粒径为70.39μm,随后随温度的升高晶体的粒度逐渐降低。采用正交实验确定了石膏型卤水体系对二水硫酸钙生长影响的最佳实验条件为:温度为70℃、搅拌速率为250 r/min,停留时间为120 min,晶种量为3 g。此时的晶体的线生长速率为2.508×10-9 m/s。 |
| 关 键 词： | 石膏型卤水 二水硫酸钙 结晶 晶体生长 |
Study on Crystallization Process of Calcium Sulfate Dihydrate in Gypsum Type Brine System |
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| TANG Na,ZHANG Yanhua,REN Chenglong,CAI Fang,WANG Jianing,JU Xingwen.Study on Crystallization Process of Calcium Sulfate Dihydrate in Gypsum Type Brine System[J].Jounral of Salt and Chemical Industry,2011,40(1). | |
| Authors: | TANG Na ZHANG Yanhua REN Chenglong CAI Fang WANG Jianing JU Xingwen |
| Affiliation: | TANG Na1,2,ZHANG Yanhua1,3,REN Chenglong1,CAI Fang4,WANG Jianing4,JU Xingwen4(1.College of Marine Science and Engineering,Tianjin University of Science & Technology,Tianjin 300457,China,2.Tianjin Key Laboratory of Marine Resources and Chemistry,3.China Salt HaoLong Co.Ltd.Pingdingshan Henan 467000,4.Tianjin Sunrise Science and Trade Co.,Ltd.Tianjin 300050,China.) |
| Abstract: | Calcium sulfate dehydrate has a great effect on the purity of sodium chloride product in the process of vacuum evaporation in gypsum type brine system.The crystallization process of calcium sulfate dehydrate in plaster brine system was studied in this work.The factors which influence the crystallization process of calcium sulfate dehydrate in gypsum type brine system were developed,they were stirring rate,retention time,weight of seed and temperature.The results showed that crystal product size increased wi... |
| Keywords: | gypsum type brine calcium sulfate dehydrate crystallization crystal growth |
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