Abstract
The beneficiation of different size fractions (+5, −31 mm) of coal using an air-fluidized bed dry dense-medium separator with silica/zircon sands as the fluidizing-bed medium has been studied. Particle size and bed height were found to strongly influence the efficiency of separation with the dry dense-medium separator. An increase in bubble size associated with increase in bed height to 15 cm results in density variations within the bed that increase the probable error for deeper fluidized beds for the smaller particles up to 0.19 from 0.06 for the shallower 10 cm bed. Good agreement was found between the theoretical yield and ash content obtained from washability curves (produced from conventional float/sink tests) and the actual yield from the dry fluid bed separation for the bulk coal sample. A comparison with industrial coal-washing unit operations indicates that dry dense-medium separations are a strong candidate as an energy- and resource-efficient alternative process.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Coal Preparation and Utilization
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
