Coal surface control for advanced fine coal flotation

Technical Report · Wed May 15 00:00:00 EDT 1991

OSTI ID:5304569

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

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

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 three major US coal seams. Concomitantly, 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 the main aspect of the project objectives. Research topics covered during this quarter include the characterization of the base coals, various flotation studies on optimization and pyrite rejection, and a detailed flotation kinetic study. The effect of hexanol, butanol, dodecane, and polyethylene glycol on flotation is described. 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 if 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. 35 figs., 17 tabs.

• Research Organization: California Univ., Berkeley, CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-88PC88878
• OSTI ID: 5304569
• Report Number(s): DOE/PC/88878-T11; ON: DE91016797
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BITUMINOUS COAL
FLOTATION
ADDITIVES
ASH CONTENT
BUTANOLS
DODECANE
HEXANOLS
PROGRESS REPORT
PYRITE
SULFUR CONTENT
WEATHERING
ALCOHOLS
ALKANES
BLACK COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROXY COMPOUNDS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MINERALS
ORGANIC COMPOUNDS
SEPARATION PROCESSES
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
010300* - Coal
Lignite
& Peat- Preparation- (1987-)
010600 - Coal
Lignite
& Peat- Properties & Composition