Kinetic Description of the Leaching Mining Process for Carnallite

Volume 2, Issue 1, February 2017     |     PP. 7-20      |     PDF (628 K)    |     Pub. Date: March 14, 2017
DOI:    353 Downloads     7674 Views  

Author(s)

Yan-Fang MA, Xi'an University of Science and Technology, Xi'an 710054, PR China; Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, PR China
Kan-She LI, Xi'an University of Science and Technology, Xi'an 710054, PR China
Zhi-Hong ZHANG, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, PR China
Tian-Qi HU, University of Chinese Academy of Sciences, Beijing 100049, PR China
Jian-Kang WANG, University of Chinese Academy of Sciences, Beijing 100049, PR China

Abstract
Underground leaching mining of carnallite is a mining method with minimal environmental impact. This method involves the leaching of potassium ions from solid carnallite into a liquid phase and subsequent recovery. Herein, we describe research on the effect of temperature on the process of carnallite dissolution, which is a key factor that affects its underground mining. The kinetics of the carnallite dissolution process has been studied, and dissolution kinetic models have been established under isothermal and non-isothermal conditions. The carnallite dissolution process conforms to the Stumm model at 298.15, 323.15 and 348.15K. The dissolution kinetics can be expressed as (0.0083T-2.511)Aexp(-E/RT)t=-1/1.4799 (2.23-c)^1.4799 under non-isothermal conditions. The concentration of potassium ions in the process of leaching mining can thereby be predicted. This model may provide guidance for more effective underground leaching mining of carnallite.

Keywords
Carnallite; underground leaching mining; non-isothermal; kinetics

Cite this paper
Yan-Fang MA, Kan-She LI, Zhi-Hong ZHANG, Tian-Qi HU, Jian-Kang WANG, Kinetic Description of the Leaching Mining Process for Carnallite , SCIREA Journal of Chemistry. Volume 2, Issue 1, February 2017 | PP. 7-20.

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