The relationship between the floatability of low-rank coal and its adhesion to air bubbles in aqueous diacetone alcohol solutions
- Maria Curie-Sklodowska Univ., Lublin (Poland)
Aggregative flotation tests of coal rank 31.1 for particle sizes {minus}0.15, {minus}0.25, {minus}0.385, and {minus}0.5 mm at a constant collector dosage (100 kg/t) and at frother reagent dosages varying from 20 to 50 kg/t were carried out. Calculations of the adhesion of aqueous diacetone alcohol (frother reagent) solutions to a coal surface precoated with n-alkanes were also made on the basis of contact angle values measured earlier. The coal flotation results obtained were correlated with the contact angle, work of adhesion, and detachment force of an air bubble from the coal surface. On the basis of the results it was determined that an increase of diacetone alcohol concentration causes an increase of coal recovery and concentrate yield, especially for fine-grained flotation feeds, and the quality of the concentrates decreased simultaneously. It was also found that there is a relationship between the yield of concentrates and the contact angle, the detachment force, and the work of adhesion. The maximal detachment force corresponded to the maximal concentrate yield and the minimal work of adhesion.
- OSTI ID:
- 6133624
- Journal Information:
- Separation Science and Technology; (USA), Vol. 25:6; ISSN 0149-6395
- Country of Publication:
- United States
- Language:
- English
Similar Records
The influence of reagent dosage on the floatability of pyrite during coal flotation
Evaluation of collector addition in the flotation of various US coals
Related Subjects
COAL
FLOTATION
ADHESION
ALCOHOLS
AQUEOUS SOLUTIONS
BUBBLES
COAL PREPARATION
COAL RANK
EXPERIMENTAL DATA
CARBONACEOUS MATERIALS
DATA
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROXY COMPOUNDS
INFORMATION
MATERIALS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
010300* - Coal
Lignite
& Peat- Preparation- (1987-)