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Title: 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

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
USDOE Pittsburgh Energy Technology Center, PA
OSTI Identifier:
7028968
Report Number(s):
DOE/PETC/TR-88/2-Pt.1
ON: DE88007300
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL FINES; CENTRIFUGATION; WASHING; SEPARATION PROCESSES; OPTIMIZATION; AEROSOLS; ASH CONTENT; COAL; COAL PREPARATION; CRUSHING; DRYING; MOISTURE; PROGRESS REPORT; REAGENTS; REGRESSION ANALYSIS; SURFACTANTS; YIELDS; CARBONACEOUS MATERIALS; CLEANING; COLLOIDS; COMMINUTION; DISPERSIONS; DOCUMENT TYPES; ENERGY SOURCES; FOSSIL FUELS; FUELS; MATERIALS; MATHEMATICS; SOLS; STATISTICS; 010300* - Coal, Lignite, & Peat- Preparation- (1987-)

Citation Formats

Cavallaro, J A, and Killmeyer, R P. 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. United States: N. p., 1988. Web.
Cavallaro, J A, & Killmeyer, R P. 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. United States.
Cavallaro, J A, and Killmeyer, R P. 1988. "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". United States.
@article{osti_7028968,
title = {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},
author = {Cavallaro, J A and Killmeyer, R P},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/7028968}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Feb 01 00:00:00 EST 1988},
month = {Mon Feb 01 00:00:00 EST 1988}
}

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