Next Article in Journal
Evaluation of Structural and Mechanical Properties of Porous Artificial Bone Scaffolds Fabricated via Advanced TBA-Based Freeze-Gel Casting Technique
Previous Article in Journal
Impact of Subharmonic and Aperiodic Laryngeal Dynamics on the Phonatory Process Analyzed in Ex Vivo Rabbit Models
Article Menu
Issue 9 (May-1) cover image

Export Article

Open AccessArticle

Composition and Morphology Characteristics of Magnetic Fractions of Coal Fly Ash Wastes Processed in High-Temperature Exposure in Thermal Power Plants

1
Department of Surface Mining, Mining Faculty, Hanoi University of Mining and Geology, 18 Vien Street, Duc Thang Ward, Bac Tu Liem District, Hanoi 10000, Vietnam
2
Faculty of Geosciences and Geoengineering, Hanoi University of Mining and Geology, Hanoi 10000, Vietnam
3
Center for Excellence in Analysis and Experiment, Hanoi University of Mining and Geology, Hanoi 10000, Vietnam
4
RIKEN Center for Advanced Intelligence Project, Goal-Oriented Technology Research Group, Disaster Resilience Science Team, Tokyo 103-0027, Japan
5
Center for Mining, Electro-Mechanical Research, Hanoi University of Mining and Geology, 18 Vien Street, Duc Thang Ward, Bac Tu Liem District, Hanoi 10000, Vietnam
6
Faculty of Mining, Saint-Petersburg Mining University, Saint-Petersburg 199106, Russia
7
Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2019, 9(9), 1964; https://doi.org/10.3390/app9091964
Received: 19 March 2019 / Revised: 15 April 2019 / Accepted: 16 April 2019 / Published: 13 May 2019
(This article belongs to the Special Issue Water-Energy-Environment Nexus (WEEN-2019))
  |  
PDF [4547 KB, uploaded 13 May 2019]
  |  

Abstract

Coal-fired power stations are one of the primary sources of power generation in the world. This will produce considerable amounts of fly ash from these power stations each year. To highlight the potential environmental hazards of these materials, this study is carried out to evaluate the characterization of fly ashes produced in thermal power plants in northern Vietnam. Fly ash was firstly fractionated according to size, and the fractions were characterized. Then, each of these fractions was analyzed with regard to their mineralogical features, morphological and physicochemical properties. The analytical results indicate a striking difference in terms of the characteristics of particles. It was found that magnetic fractions are composed of magnetite hematite and, to a lower rate, mullite, and quartz. Chemical analyses indicate that the non-magnetic components mainly consist of quartz and mullite as their primary mineral phases. As the main conclusion of this research, it is found that the magnetic and non-magnetic components differ in terms of shape, carbon content and mineralogical composition. In addition, it was found that magnetic components can be characterized as more spheroidal components compared to non-magnetic ones. This comprehensive characterization not only offers a certain guideline regarding the uses of different ash fractions but it will also provide valuable information on this common combustion process. View Full-Text
Keywords: magnetic fraction; chemical properties; fly ash coal wastes; XRD analysis; thermal power plants magnetic fraction; chemical properties; fly ash coal wastes; XRD analysis; thermal power plants
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Vu, D.-H.; Bui, H.-B.; Kalantar, B.; Bui, X.-N.; Nguyen, D.-A.; Le, Q.-T.; Do, N.-H.; Nguyen, H. Composition and Morphology Characteristics of Magnetic Fractions of Coal Fly Ash Wastes Processed in High-Temperature Exposure in Thermal Power Plants. Appl. Sci. 2019, 9, 1964.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top