Effects of operating pressure and stand-off distance on coal comminution by waterjet
Yaqing Li 1,2
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1
School of Energy Science and Engineering Department, Xi’an University of Science and Technology
 
2
Ministry of Education’s Key Lab of Mining and Disaster Prevention and Control in Western Mine
 
3
Department of Mining and Nuclear Engineering, Missouri University of Science and Technology
 
4
Department of Mining Engineering, Dokuz Eylul University
 
 
Corresponding author
Greg Galecki   

Department of Mining and Nuclear Engineering, Missouri University of Science and Technology, Rolla, MO, USA, 226 McNutt Hall, 1400 North Bishop, 65409-0450 Rolla, MO, United States
 
 
Physicochem. Probl. Miner. Process. 2017;53(1):394-401
 
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ABSTRACT
Comminution of coal to ultrafine sizes by high-pressure waterjet coupled with cavitation cell provides a novel method for preparation of coal-water fuels for next generation, near-zero emission electric power generation. To establish the fundamental performance of the waterjet mill, the effects of the operating pressure and stand-off distance were comprehensively investigated using a high ash bituminous coal. The comminution products were evaluated in terms of the particle size, particle size distribution, and surface area change. The experimental results indicated that the waterjet-mediated comminution of coal was strongly affected by all these operating parameters. Higher operating pressure led to finer products, while the efficiency of the waterjet mill in terms of particle size strongly depended on the stand-off distance. This research provides a deeper insight into the high-pressure waterjet for coal comminution and a basis for process parameter optimization.
eISSN:2084-4735
ISSN:1643-1049
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