Degradation process in coal slurry pipelines - by M. G. Ayat and B. C. Scott Technical Papers, MINING ENGINEERING, Vol. 40, No. 9 September, 1988, pp. 885

Ferri, H. P. ; Ayat, M. G.
Organization: Society for Mining, Metallurgy & Exploration
Pages: 1
Publication Date: Jan 1, 1990
I refer to the article "Degradation Process in Coal Slurry Pipelines" by M.G. Ayat and B.C. Scott in the September 1988 issue of Mining Engineering. I would like to congratulate Dr. Ayat and his colleague on a very interesting and valuable piece of work. This article is an excellent one, describing a real phenomenon that has been ignored for so long. I do, however, have an objection. The article fails to address the degradation process when coal is processed or transported in other ways than slurry form, particularly those employed in this work. Could, for example, screening (wet or dry) have contributed to the extent of degradation? Perhaps scanning electron micrographs of the samples examined and after screening would have helped to clarify this. I would like to point out that degradation is also observed in pneumatic conveying systems, mechanical conveying, and other means of transportations employed by the mineral industry.
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