Model for the decomposition of carnallite in aqueous solution

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	Model for the decomposition of carnallite in aqueous solution
	Cheng, Huaide1 ; Ma, Haizhou1 ; Hai, Qingyu1,2 ; Zhang, Zhihong1 ; Xu, Liming1 ; Ran, Guangfen1
	2015-06-10
发表期刊	INTERNATIONAL JOURNAL OF MINERAL PROCESSING
卷号	139 页码:36-42
关键词	Carnallite Decomposition Ratio Temperature Water Amount
摘要	Carnallite is a double salt (KCl center dot MgCl2 center dot 6H(2)O or KMgCl3 center dot 6H(2)O), which is a common source of potassium chloride (KCl). It is treated with a mother liquor containing magnesium chloride (MgCl2), KCl and sodium chloride (NaCl), and then KCl and NaCl precipitate in the mother liquor solution. The amount of water and the temperature are the two crucial factors for the decomposition of carnallite in aqueous solution. Because of the lack of research on the decomposition process of carnallite, the yield and quality of the KCl produced are limited. In this study, we develop a model for the decomposition of carnallite based on the multi-temperature quaternary diagram of the NaCl-KCl-MgCl2-H2O system and the principle of mass conservation for MgCl2. The model is verified using experimental and literature data for different types of carnallite: normal, Mg-rich, Na-rich, and (Mg and Na)-rich. The proposed model predicts the amount of water required for decomposition of carnallite and the yield of KCl very well for normal and Mg-rich carnallite (within 2%), for Na-rich and (Mg and Na)-rich camallite (within 8%), and for ancient evaporite carnallite in Laos (within 2%). (c) 2015 Elsevier B.V. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/6143
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所盐湖资源与化学实验室盐湖地质与环境实验室
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Qinghai, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Cheng, Huaide,Ma, Haizhou,Hai, Qingyu,et al. Model for the decomposition of carnallite in aqueous solution[J]. INTERNATIONAL JOURNAL OF MINERAL PROCESSING,2015,139:36-42.
APA	Cheng, Huaide,Ma, Haizhou,Hai, Qingyu,Zhang, Zhihong,Xu, Liming,&Ran, Guangfen.(2015).Model for the decomposition of carnallite in aqueous solution.INTERNATIONAL JOURNAL OF MINERAL PROCESSING,139,36-42.
MLA	Cheng, Huaide,et al."Model for the decomposition of carnallite in aqueous solution".INTERNATIONAL JOURNAL OF MINERAL PROCESSING 139(2015):36-42.