Comminution employing liquid nitrogen pretreatments [electronic resource].
- Washington, D.C. : United States. Office of Fossil Energy, 1990. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: (35 pages) : digital, PDF file
- Additional Creators:
- Southern Illinois University at Carbondale. Coal Extraction and Utilization Research Center, United States. Office of Fossil Energy, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- The goal of this project is to develop a methodology that will lead to the establishment of an effective, efficient technique for ultrafine grinding of coal. We believe that the key to successful coal grinding is strongly dependent upon the change of the brittleness of coal under a freezing temperature pretreatment. Furthermore, a cryogenic grinding process may provide the basis for the development of advanced technologies involving the separation of the pyritic minerals from coal. Specific objectives of the program are to: determine the effect of low temperature pretreatments on the microfracture development along the coal/pyrite interface and on the fracture resistance (brittleness) of coal. Specifically, we intend to examine the effect of direct contact of coal with liquid nitrogen, dry ice, and dry-iced acetone. Also, we intend to study pyrite liberation as a result of these treatments; determine the fracture resistance of coal under different low temperature pretreatments; determine the relationships between the fracture resistance of coal and the effectiveness of a grinding process; determine the effect of the frozen coal grinding on the pyrite liberation; evaluate factors which might effect process design, scale-up, and economics; and make a first pass economic assessment of the process. 15 refs., 13 figs., 3 tabs.
- Published through SciTech Connect., 11/01/1990., "doe/pc/89904-t18", "DE91005735", and Hippo, E.J. . Dept. of Mechanical Engine; Yen, S.C. . Dept. of Civil Engineering a.
- Funding Information:
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