Coal surface control for advanced fine coal flotation

Technical Report · Thu May 31 04:00:00 EDT 1990

OSTI ID:6679343

Fuerstenau, D W; Sastry, K V.S.; Hanson, J S; Harris, G; Sotillo, F; Diao, J; Yin, Y ^[1]; Somasundaran, P; Harris, C C; Vasudevan, T; Liu, D; Li, C ^[2]; Hu, Weibai; Zou, Y; Chen, W ^[3]; Choudhry, V; Sehgal, R; Ghosh, A ^[4]

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1. California Univ., Berkeley, CA (USA)
2. Columbia Univ., New York, NY (USA)
3. Utah Univ., Salt Lake City, UT (USA)
4. Praxis Engineers, Inc., Milpitas, CA (USA)

The primary objective in the scope of this research project is to develop advanced flotation methods for coal cleaning in order to achieve near total pyritic sulfur removal at 90% Btu recovery, using coal samples procured from six major US coal seams. The ash content of these coals is to be reduced to 6% or less. Investigation of mechanisms for the control of coal and pyrite surfaces prior to fine coal flotation is an important aspect of the project objectives. A second major objective is to investigate factors involved in the progressive weathering and oxidation of coal that had been exposed to varying weathered degrees, namely, open, covered and in an argon-inerted'' atmosphere, over a period of twelve months. After regular intervals of weathering, samples of the three base coals (Illinois No. 6, Pittsburgh No. 8 and Upper Freeport PA) were collected and shipped to both the University of Pittsburgh and the University of California at Berkeley for characterization studies of the weathered material. Progress is described on weathering, washability studies (calorific value, ash analysis, pyritic sulfur rejection, variability analysis), coal grinding and flotation, pH effects and modification of surfaces on flotation. 26 figs., 20 tabs.

• Research Organization: California Univ., Berkeley, CA (USA); Columbia Univ., New York, NY (USA); Utah Univ., Salt Lake City, UT (USA); Praxis Engineers, Inc., Milpitas, CA (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: AC22-88PC88878
• OSTI ID: 6679343
• Report Number(s): DOE/PC/88878-T7; ON: DE90016765
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ASH CONTENT
CALORIFIC VALUE
CARBONACEOUS MATERIALS
CHALCOGENIDES
CLEANING
COAL
COMBUSTION PROPERTIES
COMMINUTION
DOCUMENT TYPES
ENERGY SOURCES
FLOTATION
FOSSIL FUELS
FUELS
GRINDING
IRON COMPOUNDS
IRON SULFIDES
MACHINING
MATERIALS
MINERALS
PH VALUE
PROGRESS REPORT
PYRITE
SEPARATION PROCESSES
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
WEATHERING