Development of a centrifugal float-sink procedure for gravimetric evaluation of ultrafine coals: Part 1, The effects of surface-property-related parameters on fine-coal separations

Technical Report · Mon Feb 01 04:00:00 EST 1988

OSTI ID:7028968

Cavallaro, J A; Killmeyer, R P

This report traces the development of a centrifugal float-sink technique for determining the washability analyses of fine coal having top sizes finer than 14 mesh. All testing was performed on the Upper and Lower Kittanning bed coals only. The efforts of other researchers attempting to utilize the centrifuge for float-sink testing ultrafine coal are reviewed briefly. Exploratory test data from PETC are presented to show the effect of surfactant additions, reverse float-sink testing, and preheating of samples on the yield/ash relationships. The results of a 33-test partial factorial design used to evaluate five variables at five levels and their effects on the yield/ash relationship as depicted by an efficiency index are presented, along with follow-up tests showing the importance of lower solids concentration and higher reagent dosage. Coal moisture content and reagent dosage had the most significant effect on the yield/ash relationship. 12 refs., 9 figs., 16 tabs.

• Research Organization: USDOE Pittsburgh Energy Technology Center, PA
• OSTI ID: 7028968
• Report Number(s): DOE/PETC/TR-88/2-Pt.1; ON: DE88007300
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
AEROSOLS
ASH CONTENT
CARBONACEOUS MATERIALS
CENTRIFUGATION
CLEANING
COAL
COAL FINES
COAL PREPARATION
COLLOIDS
COMMINUTION
CRUSHING
DISPERSIONS
DOCUMENT TYPES
DRYING
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
MATHEMATICS
MOISTURE
OPTIMIZATION
PROGRESS REPORT
REAGENTS
REGRESSION ANALYSIS
SEPARATION PROCESSES
SOLS
STATISTICS
SURFACTANTS
WASHING
YIELDS