Dewatering studies of fine clean coal
Physical cleaning of ultra-fine coal using advanced froth flotation technique provides a low ash product, however, the amount of water associated with clean coal is high. Economic removal of water from the froth will be important for commercial applicability of the advanced flotation processes. The main objective of the present research program is to study and understand dewatering characteristics of ultra-fine clean coal and to develop process parameters to effectively reduce the moisture to less than 20 percent in the clean coal product. The research approach under investigation utilizes synergistic effect of metal ions and surfactant to lower the moisture of clean coal using conventional vacuum dewatering technique. During this contract period adsorption studies of anionic, non-ionic and cationic surfactants onto the clean coal were conducted. No significant moisture reduction was observed with any of the surfactant. However, a mixture of the cationic (cetyl pyridinium chloride) surfactant and aluminium metal ions provided a filter cake containing about 22 percent moisture. Morphology studies of filter cake obtained without addition of reagents showed gradation of void fraction in filter cake, which decreased from top to the bottom layer of the cake. Efforts are in progress to optimize dosages of surfactant-metal ion system to lower moisture to less than 20 percent. Additional studies on morphology of the filter cake will also be conducted. 12 figs., 2 tabs.
- Research Organization:
- Kentucky Univ., Lexington, KY (United States). Center for Applied Energy Research
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-90PC90176
- OSTI ID:
- 5359731
- Report Number(s):
- DOE/PC/90176-T45; ON: DE91018309
- Country of Publication:
- United States
- Language:
- English
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Dewatering studies of fine clean coal
Dewatering studies of fine clean coal. Technical report, September 1, 1991--November 30, 1991
Related Subjects
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
ADSORPTION
ALUMINIUM IONS
CARBONACEOUS MATERIALS
CHARGED PARTICLES
COAL
COAL PREPARATION
COPPER IONS
DOCUMENT TYPES
DRYING
ENERGY SOURCES
FILTRATION
FLOTATION
FOSSIL FUELS
FUELS
IONS
MATERIALS
MORPHOLOGY
PROGRESS REPORT
REMOVAL
SEPARATION PROCESSES
SORPTION
SURFACTANTS
WATER REMOVAL