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Show 5. Summary (1) CWM properties are characterized by the parameters of inherent moisture, oxygen/carbon ratio and HGI in its parent coal. (2) Two or more staged chemical additive injection at grinding reduces the amount of the chemical additives required as compared with conventional one stage injection. (3) Piping pressure loss of CWM can be calculated as nearly the same as a Newtonian fluid except operating range of low shear rate. (4) Sodium and/or Sulfur content by additives should be minimized and preferable-allowable range is 0 - 0.1 % per dry coal. 6. References (1) Proceeding of the 5th International Symposium on Coal Slurry Combustion, U.S. Department of Energy Publication, April 25 - 27, 1983. (2) G.A. Farthing, R.D. Daley, S.J. Vecci and E.R. Michaud "Properties and Performance Characteristics of Coal-Water Fuels" Presented to the ACS National Meeting, Seattle, Washington, March 20 - 23, 1983. (3) J.A. Barsin "Commercialization of Coal-Water Slurries-II" Presented to Coal Technology Europe, Copenhagen, Denmark, September 20 - 22, 1982. (4) T.Sakai and M. Saito "Single-Droplet Combustion of Coal Slurry Fuels" Combustion and Flame 51:141-154 (1983). 8 |