COAL PREPARATION FOR COMBUSTION AND CONVERSION. FINAL REPORT

This report stresses topics of particular interest to the electric utility industry. It covers the full scope of coal processing, from mine face to post-combustion stack gas clean-up, and provides essential information for assessing the potential contribution of physical (as opposed to chemical) coal beneficiation to a utility's fuel procurement and utilization strategy. A methodology is presented for quantifying direct costs corresponding to six different levels of preparation, ranging from mere rubbish removal from ROM coals to intensive beneficiation of crushed and sized coals in prepared media. Fixed and variable costs, including those representing Btu's lost with washing plant rejects, are tabulated for six preparation levels. Major factors influencing preparation costs are examined and the point made that such costs cannot be forecast without a detailed study of each potential application. This applies equally to estimates of quality improvements achievable and economically justifiable with a particular coal. The blending of low and medium sulfur coals is shown to be an alternative for meeting SO2 standards in some cases, but the reader is cautioned that coals after blending may exhibit disproportionately lower ash fusion temperatures. The effects on power plant operation from burning beneficiated coals are discussed, particularly as they bear on a coal's grindability, its combustion characteristics such as fouling and slagging, and on flue gas treatment systems. Coal transportation costs are investigated on a nationwide basis and impacts of financial and environmental constraints on the coal preparation industry discussed. The report leads to the conclusion that the moderate costs of coal beneficiation are often more than offset by the benefits and savings generated by this practical and proven technology. (ERA citation 03:046489)

  • Corporate Authors:

    GIBBS & HILL

    NEW YORK,    
  • Authors:
    • Phillips, P J
  • Publication Date: 1978-5

Media Info

  • Pagination: 295 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00186423
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Files: TRIS
  • Created Date: Feb 27 1979 12:00AM