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Implications for the origin of secondary sylvite from a simulation of carnallite dissolution
Cheng, Huai De; Hai, Qing Yu; Ma, Hai Zhou; Zhang, Xi Ying; Tang, Qi Liang; Fan, Qi Shun; Li, Yong Shou; Miao, Wei Liang
2016-06-01
Source PublicationJOURNAL OF GEOCHEMICAL EXPLORATION
Volume165Pages:189-198
SubtypeArticle
AbstractThe relationship between sylvinite (KCl + NaCl) and camallite (KCl center dot MgCl2.6H(2)O) is important in potash mines containing carnallite, and especially where sylvinite overlies carnallite. It is generally believed that this reversal of the normal depositional sequence may be caused by dissolution of carnallite. To obtain sylvite (KCl) from carnallite ore in the present study, first camallite ore dissolution was performed in an aqueous solution at 25 degrees C, and then the sylvite was separated from halite (NaCl) in the sylvinite by a flotation method. The Br and Rb concentrations in the sylvite derived from the carnallite ore were determined. The results showed that more than 4/5th of the Br and Rb in the carnallite ore transferred to the mother liquor, while the remainder of the Br and Rb was in the sylvinite. The sylvite separated from this sylvinite had purity of 94-96%. In the sylvite derived from carnallite, the Br concentration was obviously lower (by an order of magnitude) than the concentration in primary sylvite from evaporation of MgSO4-deficient sea water, and the Rb concentration was twice that in primary sylvite from evaporation of MgSO4-deficient sea water. Compared to the Br and Rb concentrations in secondary sylvite from Khorat Plateau, Sergipe, and Prairie evaporites, the concentrations in the sylvite derived from carnallite ore were similar. The redistribution of Br and Rb in the form of secondary sylvite was in a relative stable proportion according to the comparison of Br and Rb. The lower Br and higher Rb concentrations in sylvite derived from camallite ore could be caused by KCl re-crystallization and redistribution of Br and Rb between the solid and liquid phases. The driving force behind changes in the partition coefficients of Br and Rb is that the dissolution of carnallite is much slower than the nucleation of KCl. (C) 2016 Elsevier B.V. All rights reserved.
KeywordCarnallite Flotation Separation Leaching Dissolution Potash Secondary Sylvite
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordPRAIRIE EVAPORITE FORMATION ; ALKALI-HALIDE PARTICLES ; SOLUBLE SALT FLOTATION ; POTASH DEPOSITS ; MAGNESIUM-CHLORIDE ; KHORAT PLATEAU ; CENTRAL IRAN ; SASKATCHEWAN ; LAOS ; DIAGENESIS
Indexed BySCI
Language英语
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000375515000017
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6319
Collection青海盐湖研究所知识仓储
盐湖地质与环境实验室
科研管理、支撑部门
AffiliationChinese Acad Sci, Qinghai Inst Salt Lakes, 18 Xinning Rd, Xining 810008, Qinghai, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Huai De,Hai, Qing Yu,Ma, Hai Zhou,et al. Implications for the origin of secondary sylvite from a simulation of carnallite dissolution[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2016,165:189-198.
APA Cheng, Huai De.,Hai, Qing Yu.,Ma, Hai Zhou.,Zhang, Xi Ying.,Tang, Qi Liang.,...&Miao, Wei Liang.(2016).Implications for the origin of secondary sylvite from a simulation of carnallite dissolution.JOURNAL OF GEOCHEMICAL EXPLORATION,165,189-198.
MLA Cheng, Huai De,et al."Implications for the origin of secondary sylvite from a simulation of carnallite dissolution".JOURNAL OF GEOCHEMICAL EXPLORATION 165(2016):189-198.
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