| 镍铁尾矿硫酸浸出动力学研究 |
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| 引用本文： | 陈安安,周少奇,黄鹏飞.镍铁尾矿硫酸浸出动力学研究[J].环境科学,2013,34(7):2729-2734. |
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| 作者姓名： | 陈安安 周少奇 黄鹏飞 |
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| 作者单位： | 1. 华南理工大学环境科学与工程学院,广州,510006
2. 华南理工大学环境科学与工程学院,广州 510006;华南理工大学亚热带建筑科学国家重点实验室,广州 510641;广东省教育厅环境保护与生态修复重点实验室,广州510006 |
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| 基金项目： | "十一五"国家科技支撑计划项目(2008BAE64B05); 广州市重大科技项目(2008DLB2080500) |
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| 摘 要： | 酸浸是镍铁尾矿资源化工艺的前处理,也是整个工艺中的最为关键的步骤,目的是将尾矿中的Si、Mg以及其他金属元素有效分离.采用单粒级尾矿实验获得动力学数据,利用收缩核模型分析了硫酸浸出镍铁尾矿中Mg2+的动力学.推断硫酸浸出镍铁尾矿中Mg2+的浸出动力学属产物层扩散控制,表观活化能E为34.04 kJ·mol-1.正是这种表面形成的产物层抑制了镍铁尾矿与硫酸的进一步反应,导致尾矿中Mg2+的浸出率不高.
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| 关 键 词： | 镍铁尾矿 酸浸 动力学 活化能 资源化利用 |
| 收稿时间： | 2012/10/25 0:00:00 |
| 修稿时间： | 2012/12/17 0:00:00 |
Leaching Kinetics of Josephinite Tailings with Sulfuric Acid |
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| CHEN An-an,ZHOU Shao-qi and HUANG Peng-fei.Leaching Kinetics of Josephinite Tailings with Sulfuric Acid[J].Chinese Journal of Environmental Science,2013,34(7):2729-2734. |
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| Authors: | CHEN An-an ZHOU Shao-qi and HUANG Peng-fei |
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| Institution: | College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006, China;College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006, China;State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China;Key Laboratory of Environmental Protection and Eco-remediation of Guangdong regular Higher Education Institutions, South China University of Technology, Guangzhou 510006, China;College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006, China |
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| Abstract: | Leaching is the most important step of josephinite tailing recycle technology. This step can separate the valuable metal Mg from Si and other impure metal. Effects of sulfuric acid on leaching Mg efficiency from josephinite tailings were investigated. To obtain the leaching behavior, a modified unreacted shrinking core model that based on the experimental data was used to determine the dissolution kinetic parameters. The model was significant and showed that the dissolution of Mg2+ in josephinite tailing was controlled by the produce layer diffusion, apparent activation reaction energy E=34.04 kJ·mol-1. The produce layers obstruct the forward reaction of the dissolution of Mg2+. |
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| Keywords: | Josephinite tailings sulfuric acid leaching kinetics activation energy resource utilization |
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