Characterization of coal surfaces. Technical progress report, 21 May-20 August 1986
The overall objective of this research work is directed towards delineating the fundamental aspects of the interfacial behavior of coal in relation to surface-based beneficiation processes for coal cleaning. Previous reports have presented the results of our film flotation technique to evaluate the wettability characteristics of coal. The efficacy of the film flotation technique to characterize the lyophobicity (hydrophobicity) of particles was confirmed by comparing the average critical wetting tension value obtained by this method with that obtained from contact angle measurements. By coating different mineral substrates with paraffin wax, the negligible effect of gravity on film flotation was demonstrated. Various flotation tests were performed to correlate flotation behavior with the critical surface tension results obtained from the film flotation experiments. Research during the last quarter was directed along two main lines: (1) repeat the earlier film flotation response of a series of coal samples to correlate wettability with their bulk properties; (2) conduct film flotation of chemically treated glass beads to delineate particle shape effects in this characterization process. 2 refs., 1 fig., 2 tabs.
- Research Organization:
- California Univ., Berkeley (USA). Coll. of Engineering
- DOE Contract Number:
- FG22-84PC70776
- OSTI ID:
- 5378354
- Report Number(s):
- DOE/PC/70776-T8; ON: DE86015795
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
CHEMICAL COMPOSITION
OXIDATION
COAL FINES
FLOTATION
WETTABILITY
GLASS
METHANOL
SURFACE TENSION
QUARTZ
EXPERIMENTAL DATA
RESEARCH PROGRAMS
SHAPE
ALCOHOLS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROXY COMPOUNDS
INFORMATION
MATERIALS
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SURFACE PROPERTIES
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage