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Energy Sources, Part A: Recovery, Utilization, and Environmental Effects Volume 40, 2018 - Issue 5
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Original Articles

Preparation of ultra-low ash coal

Haifeng WangSchool of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, China;Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, Xuzhou, ChinaView further author information
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Guangwen ZhangSchool of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, China;Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, Xuzhou, ChinaView further author information
,
Juan HaoSchool of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, China;Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, Xuzhou, ChinaCorrespondence[email protected]
View further author information
,
Xing YangSchool of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, China;Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, Xuzhou, ChinaView further author information
&
Shuhe ChenSchool of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, China;Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining & Technology, Xuzhou, ChinaView further author information
Pages 594-599 | Published online: 12 Feb 2018
 
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ABSTRACT

The anthracite with an ash content of 3.56% was used to prepare ultra-low ash coal using a novel triboelectric separator with zigzag separation chamber in this study. The composition, density composition, and size distribution of coal sample were analyzed. Effects of voltage, airflow, and feed rate on triboelectric separation of coal were investigated. The results show that the ash content of ultra-low ash decreases with the voltage increase and reduces at lower airflow and then presents a rising trend with the increasing airflow. However, the effect of feed rate is not significant. The ultra-low ash coal with an ash content of 1.83% is obtained with 64.54% yield at 80 kV voltage, 70 m3/h airflow, and 75 Hz feed rate.

Additional information

Funding

This work is supported by the Fundamental Research Funds for the Central Universities (2014QNB10) and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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