Preparation of super-clean coal. Technical progress report for third and fourth quarters, March 15, 1984-September 14, 1984

Technical Report · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6038241

Yonn, R H; Adel, G T; Luttrell, G H

To better understand the fundamental steps involved in the froth flotation process, the collection efficiencies for the flotation of a very hydrophobic, ash-free coal sample have been determined. The results show that the collection efficiency increases drastically with decreasing bubble size, as predicted from a hydrodynamic model proposed by Weber and Paddock (1983). A mathematical model has been developed in the present work to predict the rate constant as a function of bubble size using theoretical collision efficiency values. The experimental rate constants determined in the present work, using a run-of-mine coal, exhibit a power relationship predicted from the model, but the values are lower than the model predictions by approximately 35 to 45%. This discrepancy may be attributed to other efficiency terms, e.g., adhesion efficiency, not considered in this model. 5 references, 9 figures.

• Research Organization: Virginia Polytechnic Inst. and State Univ., Blacksburg (USA). Dept. of Mining and Minerals Engineering
• DOE Contract Number: FG22-83PC60806
• OSTI ID: 6038241
• Report Number(s): DOE/PC/60806-T2; ON: DE85003708
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
BUBBLES
CARBONACEOUS MATERIALS
CLEANING
COAL
COAL FINES
COMMINUTION
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FLOTATION
FORECASTING
FOSSIL FUELS
FUELS
INFORMATION
MATERIALS
MATHEMATICAL MODELS
NUMERICAL DATA
RESEARCH PROGRAMS
SEPARATION PROCESSES