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Title Breakage and Mass Transport of Coal Particles in Ring-roller Mills
Creator Shoji, K.; Meguri, N.; Sato, K.; Kanemoto, H.; Shima, T.; Hasegawa, T.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1991
Spatial Coverage presented at Honolulu, Hawaii
Abstract A mathematical model was developed for a ring-roller mill based on specific rates of breadage, primary breakage distributions and primary and secondary classification parameters. The model parameters were evaluated by laboratory and pilot-scale tests. At first, the specific rates of breakage and breakage distribution parameters of various types of coals were measured in a batch roller mill. Secondly, the primary classification of particles falling back onto the grinding table due to gravity and the secondary classification due to the built-on classifier were studied in model classifiers and empirical operating-design equations were then developed. Lastly, steady-state continuous grinding tests were carried out in pilot-scale mills to correlate variations of scale factors with make-up feed rates, mill geometry and operating conditions. Furthermore, empirical correlations on mass transport through the mills were also developed. The validity of the model was verified by steady-state data obtained in pilot- and industrial-scale mills. The effect of various operating conditions on the mill performance was first investigated by model simulations. The unsteady-state behaviors of a mill were then predicted by the model.
Type Text
Format application/pdf
Language eng
Rights This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
Conversion Specifications Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician Cliodhna Davis
ARK ark:/87278/s6057jgs
Setname uu_afrc
ID 6827
Reference URL https://collections.lib.utah.edu/ark:/87278/s6057jgs

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Title Page 7
Format application/pdf
OCR Text Show
Setname uu_afrc
ID 6822
Reference URL https://collections.lib.utah.edu/ark:/87278/s6057jgs/6822