Research & Development

Migration and distribution of iodine in process of decomposing phosphate ore by nitric acid

  • Ping Yang ,
  • Lin Yang ,
  • Yang Feng ,
  • Qian Lin ,
  • Jianxin Cao
Expand
  • 1.School of Chemistry and Chemical Engineering,Guizhou University,Guiyang,550025,China
    2.Engineering Research Center for High Efficiency Utilization of Industrial Waste of Guizhou Province
    3.Key Laboratory of Green Chemical and Clean Energy Technology of Guizhou Province

Received date: 2019-10-26

  Online published: 2020-04-22

Abstract

Phosphate ore decomposed by nitric acid is an important operating unit in the process of nitrophosphate produc-tion.The effects of acid hydrolysis time of 30~240 min,temperature of 40~90 ℃,nitric acid initial mass fraction of 40%~65% and acid to phosphate ore mass ratio of 1.15:1~1.35:1 on the migration and distribution of iodine in phosphate ore for gas,liquid and solid phases were studied.The results showed that in the decomposition process of phosphate ore by nitric acid,iodine transferred to the gas phase in the form of elemental.The distribution rate of iodine in gas phase increased with the increase of acidolysis time,temperature and nitric acid initial concentration.However,with the increase of mass ratio of acid to phosphate ore,iodine in the gas phase first increased and then decreased.The distribution rate of iodine in gas phase was more affected by acid hydrolysis time and temperature than by other parameters.When the process parameters were controlled at the acidolysis temperature of 60 ℃,nitric acid initial mass fraction of 55%,acid to phosphate ore mass ratio of 1.25:1 and acidolysis time of 120 min,the distribution rate of iodine in the gas phase was 65.21%,the distribution rate in the liquid phase was 26.89%,and the distribution rate in the solid phase was 7.91%.

Cite this article

Ping Yang , Lin Yang , Yang Feng , Qian Lin , Jianxin Cao . Migration and distribution of iodine in process of decomposing phosphate ore by nitric acid[J]. Inorganic Chemicals Industry, 2020 , 52(4) : 53 -56 . DOI: 10.11962/1006-4990.2019-0303

References

[1] 邹兰, 姚芝茂, 江梅 . 磷肥生产过程中伴生元素的回收与污染控制[ C]∥中国环境科学学会.2014中国环境科学学会学术年会, 2014.
[2] 霍丹群, 侯长军, 涂敏端 . 我国磷矿资源特点与制富过磷酸钙技术的发展[J].化肥工业, 1996(5):13-16.
[3] 张耀, 李天祥, 朱静 , 等. 湿法磷酸中碘的回收及其在医药中间体制备中的应用[J]. 化肥工业, 2016,43(2):6-9.
[4] 张红映, 雷学联 . 中国碘资源和碘化工生产与消费[J]. 磷肥与复肥, 2011,26(2):76-78.
[5] 孙克萍, 佘顺利, 王克功 , 等. 瓮福磷块岩物相结构及碘的赋存状态研究[J].化工矿物与加工, 2009(10):17-19.
[6] 孙振亚 . 贵州瓮福磷矿含碘磷灰石的微束分析及合成实验研究(摘要)[J].地球与环境, 1988(10):103-104.
[7] 王良士, 龙志奇, 于瀛 , 等. 湿法磷酸生产过程中控制硫酸钙结晶的研究[J].化工矿物与加工, 2008(4):1-4.
[8] 郑晓霞 . 硫酸钙在硝酸-磷酸介质中的结晶形态及溶解度的研究[D]. 太原:太原理工大学, 2010.
[9] 丁炜, 安泓汋, 刘期崇 , 等. 硝酸分解磷矿的宏观动力学研究[J]. 硫磷设计与粉体工程, 2002,21(2):4-8.
[10] 杨丽萍, 史春英, 胡宏 , 等. 半水法湿法磷酸生产工艺条件对碘分布影响的研究[J]. 磷肥与复肥, 2013,28(4):22-25.
Outlines

/