Fine coal cleaning. Final report for the period ending March 31, 1986
Washability data on coals from the western United States is generally very limited and their response to standard washing techniques cannot be predicted. To expand the data base, the Department of Energy initiated a washability study for both conventional and fine-size ranges of western coals. The Pittsburgh Energy Technology Center (PETC) performed float-sink washability testing on 156 western coals crushed to 1 1/2'' x 0, 3/8'' x 0, and 14 mesh x 0. The University of North Dakota Energy Research Center (UNDERC) performed centrifugal float-sink washability resting on 61 of those 156 test coals crushed to 65 mesh x 0. In addition, 35 of the 65 mesh x 0 coals were further reduced to 200 mesh x 0 and tested, and three coals were pulverized to 325 mesh x 0 and tested. Generally, the higher-ranked coals were most amenable to the gravity separation technique. Pulverized of study coals to finer grain size distributions did not significantly improve the coal's Washabilities, as float ash content of 200 mesh x 0 and 325 mesh x 0 samples were generally similar to 65 mesh x 0 float ash content. UNDERC also investigated the applicability of oil agglomeration and froth floatation on the benefication of four selected economically important western coals. In general, these tests were not as successful at beneficiating western coals as the standard float-sink technique, which provided the highest degree of ash separation at the highest weight yields. This final report summarizes work completed on the float-sink washability data base, oil agglomeration testing, and froth flotation testing at UNDERC from May 1983 through March 1986. 12 refs., 1 fig., 1 tab.
- Research Organization:
- North Dakota Univ., Grand Forks (USA). Energy and Mineral Research Center
- DOE Contract Number:
- FC21-83FE60181
- OSTI ID:
- 5514480
- Report Number(s):
- DOE/FE/60181-2091; ON: DE86014274
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL FINES
AGGLOMERATION
FLOTATION
WASHING
BITUMINOUS COAL
CLEANING
CRUSHING
EXPERIMENTAL DATA
LIGNITE
PULVERIZED FUELS
RESEARCH PROGRAMS
SUBBITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
COAL
COMMINUTION
DATA
ENERGY SOURCES
FOSSIL FUELS
FUELS
INFORMATION
MATERIALS
NUMERICAL DATA
SEPARATION PROCESSES
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage