| 硝酸分解磷矿过程中碘的迁移分布规律 |
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| 引用本文： | 杨萍,杨林,冯洋,林倩,曹建新. 硝酸分解磷矿过程中碘的迁移分布规律[J]. 无机盐工业, 2020, 52(4): 53-56. DOI: 10.11962/1006-4990.2019-0303 |
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| 作者姓名： | 杨萍 杨林 冯洋 林倩 曹建新 |
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| 作者单位： | 1.贵州大学化学与化工学院,贵州贵阳 5500252.贵州省工业废弃物高效利用工程研究中心3.贵州省绿色化工与清洁能源重点实验室 |
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| 基金项目： | 贵州省科技计划项目(黔科合支撑[2016]2330);贵州省科技计划项目(黔科合支撑[2018]2194);国家重点研发计划(2018YFC1900206);黔科合平台人才([2019]5668号) |
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| 摘 要： | 硝酸分解磷矿是硝酸磷肥生产过程中重要的操作单元。研究了酸解时间为30~240 min、酸解温度为40~90 ℃、硝酸初始质量分数为40%~65%及酸矿质量比为1.15:1~1.35:1对磷矿中碘在气、液、固三相中迁移分布的影响。结果表明：硝酸分解磷矿过程中,碘以单质的形式迁移至气相中。随着酸解时间、酸解温度、硝酸初始浓度的增加,碘在气相中的分布率增大。然而,随着酸矿质量比的增加,气相中的碘呈现出先增加后减小的趋势。酸解时间和酸解温度对碘在气相中分布率的影响最大。当工艺参数控制在酸解温度为60 ℃、硝酸初始质量分数为55%、酸矿质量比为1.25:1、酸解时间为120 min时,碘在气、液、固三相中分布率分别为65.21%、26.89%、7.91%。
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| 关 键 词： | 磷矿 硝酸 碘 迁移分布 |
| 收稿时间： | 2019-10-26 |
Migration and distribution of iodine in process of decomposing phosphate ore by nitric acid |
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| Yang Ping,Yang Lin,Feng Yang,Lin Qian,Cao Jianxin. 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 |
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| Authors: | Yang Ping Yang Lin Feng Yang Lin Qian Cao Jianxin |
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| Affiliation: | 1.School of Chemistry and Chemical Engineering,Guizhou University,Guiyang,550025,China2.Engineering Research Center for High Efficiency Utilization of Industrial Waste of Guizhou Province3.Key Laboratory of Green Chemical and Clean Energy Technology of Guizhou Province |
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| 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%. |
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| Keywords: | phosphate ore nitric acid iodine migration and distribution |
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