| 流化床中硝酸钙晶体生长的实验研究 |
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| 引用本文： | 王晓勉,黄志宇,翟智拓,夏素兰,朱家骅. 流化床中硝酸钙晶体生长的实验研究[J]. 磷肥与复肥, 2010, 25(4): 20-22 |
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| 作者姓名： | 王晓勉 黄志宇 翟智拓 夏素兰 朱家骅 |
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| 作者单位： | 1. 西南石油大学,四川,成都,610500
2. 四川大学,四川,成都,610065 |
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| 摘 要： | 流态化结晶分离硝酸钙是改进硝酸磷肥工艺的关键技术。实验获得了流化床循环流动条件下的Ca(NO3)2-H2O二元体系溶液在6.5～24.5℃的第1过饱和曲线,其对应的拟介稳相区过饱和度Δw(Ca(NO3)2)=4.2%～4.5%。该条件下四水硝酸钙晶体在流化床中均匀生长,平均线性生长速率可达u=0.06mm/min。
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| 关 键 词： | 硝酸磷肥 硝酸钙 结晶生长 流态化 |
Experimental study on calcium nitrate crystal growth in a fluidized bed |
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| WANG Xiao-mian,HUANG Zhi-yu,ZHAI Zhi-tuo,XIA Su-lan,ZHU Jia-hua. Experimental study on calcium nitrate crystal growth in a fluidized bed[J]. Phosphate & Compound Fertilizer, 2010, 25(4): 20-22 |
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| Authors: | WANG Xiao-mian HUANG Zhi-yu ZHAI Zhi-tuo XIA Su-lan ZHU Jia-hua |
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| Affiliation: | 2 (1.Southwest Petroleum University, Chengdu, Siehuan 610500, China; 2.Siehuan University, Chengdu, Sichuan 610065, China) |
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| Abstract: | Crystallization separation of calcium nitrate by fluidization is a key technology for improvement of nitrophosphate production. Based on experimental study, the first supersaturation curve of Ca （NO3）2-H2O binary system of solution is obtained within the temperature range of 6.5- 24.5℃ and under the circulating flow in fluidized bed, its corresponding supersaturation ratio in pseudo-metastable phase zone is of A w = 4.2%- 4.5%, the calcium nitrate tetrahydrate crystal keeps even growth with the average linear growth rate u = 0.06 mm/min. |
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| Keywords: | nitrophosphate calcium nitrate crystal growth fluidization |
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