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Open AccessArticle

Lithium Enrichment in the No. 21 Coal of the Hebi No. 6 Mine, Anhe Coalfield, Henan Province, China

State Key Laboratory of Coal Resources and Safe Mining, College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China
College of Resources and Environmental Science, Hebei Normal University, Shijiazhuang 050024, China
Departments of Chemical and Petroleum Engineering, and School of Energy Resources, University of Wyoming, Laramie, WY 82071, USA
School of Civil and Environmental Engineering, Georgia Institute of Technology, Mason Building, 790 Atlantic Drive, Atlanta, GA 30332, USA
Author to whom correspondence should be addressed.
Minerals 2020, 10(6), 521;
Received: 18 May 2020 / Revised: 31 May 2020 / Accepted: 3 June 2020 / Published: 5 June 2020
(This article belongs to the Collection Minerals in Coal and Coal Combustion Products)
Lithium (Li) is an important strategic resource, and with the increasing demand for Li, there are some limitations in the exploitation and utilization of conventional deposits such as the pegmatite-type and brine-type Li deposits. Therefore, it has become imperative to search for Li from other sources. Li in coal is thought to be one of the candidates. In this study, the petrology, mineralogy, and geochemistry of No. 21 coal from the Hebi No. 6 mine, Anhe Coalfield, China, was reported, with an emphasis on the distribution, modes of occurrence, and origin of Li. The results show that Li is enriched in the No. 21 coal, and its concentration coefficient (CC) value is 6.6 on average in comparison with common world coals. Lithium in the studied coal is mainly present in aluminosilicates, mainly clay minerals, some of which contain a significant amount of Ti. The Li enrichment in the No. 21 coal is mainly controlled by the terrigenous materials and sourced from the moyite of the Yinshan Upland. Furthermore, Li in the No. 21 coal is more enriched in coals formed in acidic and humid conditions and coals influenced by fresh water during peat accumulation. View Full-Text
Keywords: coal; lithium; enrichment; modes of occurrence; origin; Anhe Coalfield coal; lithium; enrichment; modes of occurrence; origin; Anhe Coalfield
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MDPI and ACS Style

Wei, Y.; He, W.; Qin, G.; Fan, M.; Cao, D. Lithium Enrichment in the No. 21 Coal of the Hebi No. 6 Mine, Anhe Coalfield, Henan Province, China. Minerals 2020, 10, 521.

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