Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid

Li Cui; Yanxia Guo; Xuming Wang; Zhiping Du; Fangqin Cheng

doi:10.1016/j.cjche.2014.05.017

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Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid

能源、资源与环境技术 | Updated：2026-01-06

- Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid
- Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid
- 中国化学工程学报（英文版） 2015年23卷第3期页码：590-596
- Affiliations：
  
  1. Institute of Resources and Environment Engineering, Shanxi University, State Environmental Protection Key Laboratory of Efficient Utilization Technology of CoalWaste Resources,Taiyuan,China,030006
  2. Department of Metallurgical Engineering, College of Mines and Earth Sciences, University of Utah,UT,Salt Lake City,USA,84112
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2014.05.017
  中图分类号：
- 纸质出版：2015
- Accepted：
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Li Cui, Yanxia Guo, Xuming Wang, 等. Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid[J]. 中国化学工程学报（英文版）, 2015,23(3):590-596.

Li Cui, Yanxia Guo, Xuming Wang, Zhiping Du, Fangqin Cheng. Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid[J]. , 2015, 23(3): 590-596.
Li Cui, Yanxia Guo, Xuming Wang, 等. Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid[J]. 中国化学工程学报（英文版）, 2015,23(3):590-596. DOI： 10.1016/j.cjche.2014.05.017.

Li Cui, Yanxia Guo, Xuming Wang, Zhiping Du, Fangqin Cheng. Dissolution kinetics of aluminum and iron from coal mining waste by hydrochloric acid[J]. , 2015, 23(3): 590-596. DOI： 10.1016/j.cjche.2014.05.017.

摘要

Abstract

The extraction of aluminum from coal mining waste (CMW) is an important industrial process. The two major problems in applications are low aluminum dissolution efficiency and high iron content in the raw material

which affect the quantity and quality of products. To improve the aluminumrecovery process

the leaching kinetics of CMWwith hydrochloric acid was studied. A shrinking core model was used to investigate aluminum and iron dissolution kinetics. Based on the kinetic characteristics

a process for recovering aluminum was proposed and tested experimentally. It is found that the aluminum leaching reaction is controlled by surface reaction at low temperatures (40-80℃) and by diffusion process at higher temperatures (90-106℃). The iron dissolution process is dominated by surface reaction at 40-100℃. The results showthat iron could be dissolved or separated by concentrated hydrochloric acid. Fine grinding will improve aluminum dissolution significantly.

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