Carbon dioxide for fine coal flotation. Annual progress report, September 1985-September 1986

Technical Report · Tue Sep 30 04:00:00 EDT 1986

OSTI ID:7149112

Miller, J D

Preliminary research has demonstrated the potential for the production of superclean coal by a carbon dioxide flotation technique. In this regard, a detailed research effort on the fundamentals of coal flotation by carbon dioxide was initiated in September 1985. During the past year, research has been carried out on different aspects of the problem including hydrophobic characterization, bench-scale flotation, adsorption from the gas phase, electrokinetic behavior, and FTIR spectroscopy for coals of different rank. The hydrophobic character has been established by bubble attachment-time measurements and contact-angle measurements by means of a high-speed video system and an electronic induction timer. Bench-scale flotation experiments have provided an indication of the effectiveness of carbon dioxide flotation on the more practical side in terms of mineral matter rejection and flotation rate. By combining the studies of adsorption density, electrokinetic behavior, and FTIR spectroscopy, the characterization regarding the specificity and interaction of carbon dioxide at the coal surface has been examined. This annual report presents the major results and progress from the research effort made in the past year. A better understanding for carbon dioxide flotation has already been achieved although the program has not yet been completed. 28 refs., 21 figs., 12 tabs.

• Research Organization: Utah Univ., Salt Lake City (USA). Dept. of Metallurgy
• DOE Contract Number: FG22-85PC80530
• OSTI ID: 7149112
• Report Number(s): DOE/PC/80530-T3; ON: DE87001909
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ADSORPTION
ADSORPTION ISOTHERMS
ANTHRACITE
ASH CONTENT
BENCH-SCALE EXPERIMENTS
BITUMINOUS COAL
BLACK COAL
BROWN COAL
BUBBLES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COAL FINES
COAL RANK
DATA
ELECTROPHORESIS
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FLOTATION
FOSSIL FUELS
FUELS
INFORMATION
ISOTHERMS
LIGNITE
LOW TEMPERATURE
MATERIALS
NITROGEN
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REAGENTS
RESEARCH PROGRAMS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SUBBITUMINOUS COAL
SULFUR CONTENT
SURFACE AREA
SURFACE PROPERTIES