CHARACTERIZATIONS AND STABILITY OF COLLOIDAL COAL-MEASURE KAOLINITE IN AQUEOUS SUSPENSIONS: A REVIEW

Lingyun Liu, Yang Hu, Fanfei Min, Mingxu Zhang and Shaoxian Song ()
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Lingyun Liu: School of Materials Science and Engineering, Anhui University of Science and Technology, Shungeng Road 168, Huainan, Anhui 232001, China
Yang Hu: College of Resource and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070, China
Fanfei Min: School of Materials Science and Engineering, Anhui University of Science and Technology, Shungeng Road 168, Huainan, Anhui 232001, China
Mingxu Zhang: School of Materials Science and Engineering, Anhui University of Science and Technology, Shungeng Road 168, Huainan, Anhui 232001, China
Shaoxian Song: Instituto de Metalurgia, Universidad Autonoma de San Luis Potosi, Ave. Sierra Leona 550, San Luis Potosi, C. P. 78210, Mexico

Surface Review and Letters (SRL), 2013, vol. 20, issue 01, 1-9

Abstract: Coal-measure kaolinite is a main gangue mineral in coal deposits. Because of the colloidal particle size, the kaolinite is very stable in coal tailing slurries, leading to a high turbidity of recycled water in coal washing plants. The coagulation of colloidal kaolinite in aqueous suspensions is an essential problem in many coal washing plants. This review highlights the characterizations and stability of colloidal coal-measure kaolinite in aqueous suspensions. The characterizations include mineralogy, electrokinetics and hydration layers on kaolinite surfaces. The coagulation of colloidal kaolinite in aqueous suspensions is reviewed and discussed on the basis of the DLVO theory and the characterization. In addition,the main parameters of affecting the coagulation, such as suspension pH, electrolytic ions and temperature, are summarized.

Keywords: Coal-measure kaolinite; mineralogical characterization; electrokinetics; coagulation (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1142/S0218625X13300013

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