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Chapter1:Coal preparation
Unit operations
Coarse-coal vs . fine-coal circuits
Seam-to-steam strategy Role of coal surface properties in fine-coal processing
References
Chapter2:Coal characteristics related to coal preparation
Introduction
Coal classification
Coal petrography
Inorganic matter in coal
Sulfur in coal
Liberation
References
Chapter3:Coal surface properties
Introduction
Coal surface wettability
Contact angles
Electrical charge at coal/water interface
Coal porosity and moisture
Surface components hypothesis
Patchwork assembly model of coal surface
Effect of coal rank on floatability
Experimental methods of characterizing coal wettability
Floatability of coal macerals
Contact angle measurements on flat surfaces
Contact angle measurements on granular material
Maximum particle-to-bubble attachment method
Suction potential method
Direct measurements on compressed discs
Methods based on the rate of liquid penetration
Penetration rate method
Methods based on behavior of solid particles in liquids