Title

The Use of High Pressure Water Jets as a High Efficiency Tool for Coal Comminution

Abstract

The advantages of using high pressure water jets as a new technique for breaking coal into particles of an ultra fine size distribution are reviewed in this paper. The results of a preliminary investigation of the technique, carried out at the Missouri-Rolla University are presented. These data indicate that the lower levels of energy required of this comminution process, in contrast to that required by conventional technology, improve the practical viability of using fine powdered coal in industrial processes, when the water jet comminution is included in the grinding cycle. The compressive stress mode of failure induced in conventional milling processes was changed in water jet comminution to a tensile failure by extension of existing particle boundaries and the benefits of this change in failure mode are reviewed. (A)

Department(s)

Mining and Nuclear Engineering

Document Type

Report - Technical

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1985 Pittsburgh Energy Technology Center, All rights reserved.

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