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Title: Ash and slag characterization. Final report for the period ending March 31, 1986

Abstract

A procedure was developed for mine sampling and the storage of standard coals under argon. In total, 53 coals were collected and are also available to other DOE supported projects at the Center. Task 2 was the study of mineral transformation during ashing of low-rank coals. Results of this study verified the importance of organically-bound alkalies, specifically calcium and sodium, in forming low-melting temperature aluminosilicates (i.e., melilites). Task 3 highlighted the viscosity studies on the molten ash of low-rank coals. A major part of this study involved the modification of the Urbain equation so that it can be used to predict the Newtonian behavior of low-rank coal slags. In addition, the effects of iron and sodium on viscosity, hysteresis, and the nature of the non-Newtonian flow were examined. Task 4 comprised the identification of volatilized species evolved during the combustion of selected low-rank coals. In each case sodium, potassium and sulfur were found to be major components of the condensed volatiles. Verification of their volatility on an experimental basis has significance in their possible contributions to forming new solid and liquid phases at high temperatures. Finally Task 5 evaluated the use of various sessile drop techniques to determine the surfacemore » tension of low-rank coal slags. Results show that meaningful surface tension measurements can be obtained with the use of vitreous carbon as a substrate.« less

Authors:
Publication Date:
Research Org.:
North Dakota Univ., Grand Forks (USA). Energy and Mineral Research Center
OSTI Identifier:
5446843
Report Number(s):
DOE/FE/60181-2092
ON: DE86014275
DOE Contract Number:  
FC21-83FE60181
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 54 ENVIRONMENTAL SCIENCES; COAL; MINERAL WASTES; FLY ASH; WASTE MANAGEMENT; SLAGS; CALCIUM; CHEMICAL COMPOSITION; CHEMICAL PROPERTIES; IRON; POTASSIUM; SODIUM; SULFUR; SURFACE TENSION; VISCOSITY; VOLATILITY; AEROSOL WASTES; ALKALI METALS; ALKALINE EARTH METALS; ASHES; CARBONACEOUS MATERIALS; ELEMENTS; ENERGY SOURCES; FOSSIL FUELS; FUELS; MANAGEMENT; MATERIALS; METALS; NONMETALS; RESIDUES; SOLID WASTES; SURFACE PROPERTIES; TRANSITION ELEMENTS; WASTES; 010800* - Coal, Lignite, & Peat- Waste Management; 500200 - Environment, Atmospheric- Chemicals Monitoring & Transport- (-1989)

Citation Formats

Falcone, S K. Ash and slag characterization. Final report for the period ending March 31, 1986. United States: N. p., 1986. Web. doi:10.2172/5446843.
Falcone, S K. Ash and slag characterization. Final report for the period ending March 31, 1986. United States. https://doi.org/10.2172/5446843
Falcone, S K. 1986. "Ash and slag characterization. Final report for the period ending March 31, 1986". United States. https://doi.org/10.2172/5446843. https://www.osti.gov/servlets/purl/5446843.
@article{osti_5446843,
title = {Ash and slag characterization. Final report for the period ending March 31, 1986},
author = {Falcone, S K},
abstractNote = {A procedure was developed for mine sampling and the storage of standard coals under argon. In total, 53 coals were collected and are also available to other DOE supported projects at the Center. Task 2 was the study of mineral transformation during ashing of low-rank coals. Results of this study verified the importance of organically-bound alkalies, specifically calcium and sodium, in forming low-melting temperature aluminosilicates (i.e., melilites). Task 3 highlighted the viscosity studies on the molten ash of low-rank coals. A major part of this study involved the modification of the Urbain equation so that it can be used to predict the Newtonian behavior of low-rank coal slags. In addition, the effects of iron and sodium on viscosity, hysteresis, and the nature of the non-Newtonian flow were examined. Task 4 comprised the identification of volatilized species evolved during the combustion of selected low-rank coals. In each case sodium, potassium and sulfur were found to be major components of the condensed volatiles. Verification of their volatility on an experimental basis has significance in their possible contributions to forming new solid and liquid phases at high temperatures. Finally Task 5 evaluated the use of various sessile drop techniques to determine the surface tension of low-rank coal slags. Results show that meaningful surface tension measurements can be obtained with the use of vitreous carbon as a substrate.},
doi = {10.2172/5446843},
url = {https://www.osti.gov/biblio/5446843}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 1986},
month = {Sun Jun 01 00:00:00 EDT 1986}
}