| 闪锌矿氧压氨浸过程动力学研究 |
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| 引用本文： | 刘春霞,尹周澜,丁治英,黄雅玲. 闪锌矿氧压氨浸过程动力学研究[J]. 矿冶工程, 2017, 37(4): 77-81. DOI: 10.3969/j.issn.0253-6099.2017.04.021 |
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| 作者姓名： | 刘春霞 尹周澜 丁治英 黄雅玲 |
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| 作者单位： | 中南大学 化学化工学院, 湖南 长沙 410083 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(2014CB643401);国家自然科学基金(51404299) |
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| 摘 要： | 在NH3-(NH4)2SO4体系中, 采用氧压氨浸工艺, 研究了闪锌矿的浸出行为。研究表明, 在浸出温度110 ℃、总氨浓度4 mol/L、NH3与NH4+浓度比为5∶3、总压0.5 MPa、搅拌速度500 r/min、液固比25、矿物粒度-0.063 mm条件下浸出5 h, 锌浸出率可达97%。采用液固反应的收缩核模型进行模拟, 得到了闪锌矿氧压氨浸的浸出动力学方程式, 其表观活化能为47.26 kJ/mol。
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| 关 键 词： | 闪锌矿 氧压氨浸 NH3-(NH4)2SO4体系 动力学 |
| 收稿时间： | 2017-02-26 |
Kinetics of Sphalerite in Oxygen-pressure Ammonia-leaching Process |
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| LIU Chun-xia,YIN Zhou-lan,DING Zhi-ying,HUANG Ya-ling. Kinetics of Sphalerite in Oxygen-pressure Ammonia-leaching Process[J]. Mining and Metallurgical Engineering, 2017, 37(4): 77-81. DOI: 10.3969/j.issn.0253-6099.2017.04.021 |
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| Authors: | LIU Chun-xia YIN Zhou-lan DING Zhi-ying HUANG Ya-ling |
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| Affiliation: | School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China |
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| Abstract: | The leaching behavior of sphalerite concentrate in NH3-(NH4)2SO4 solution by oxygen-pressure ammonia-leaching process was investigated. The leaching rate of zinc could be up to 97% after 5h-leaching process under the following optimum conditions, including a leaching temperature of 110 ℃ with pressure of 0.5 MPa, a particle size of -0.063 mm, 2.5 mol/L NH3, 0.75 mol/L (NH4)2SO4, with total ammonia concentration at 4 mol/L, agitation speed at 500 r/min, liquid/solid ratio at 25. The shrinking core model for liquid-solid reaction was adopted for simulation to obtain the kinetic equation of sphalerite in the oxygen-pressure ammonia-leaching process. Then, the apparent activation energy was determined to be 47.26 kJ/mol. |
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| Keywords: | sphalerite oxygen-pressure ammonia-leaching NH3-(NH4)2SO4 solution kinetics |
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