Investigation of pyrite as a contributor to slagging in Eastern Bituminous coals. Quarterly progress report 10, January 1-March 30, 1984

Technical Report · Fri Jun 01 04:00:00 EDT 1984

DOI:https://doi.org/10.2172/6777374· OSTI ID:6777374

Bryers, R. W.

The objective of this program is to examine slags formed as a result of firing coals with varying concentration levels, size distribution, and orientation of pyrite with regard to mineral matter in the coal in a laboratory furnace. The program tasks are: (1) selection of eight candidate coals; (2) chemical characterization of the coal samples and identification of the pyrite size, distribution, and orientation with respect to other mineral matter and concentration levels; (3) testing of the candidate coals in a laboratory furnace; (4) chemical and physical characterization of the slag and fly ash samples created by the impurities in the coal sample; (5) influence of coal beneficiation on furnace slagging; and (6) analysis of data and identification of parameters influencing the contribution of pyrite to slagging problems. Results of analysis of two coals, Illinois No. 5 Gallatin County, Illinois and Lower Kittaning Clarion County, Pennsylvania, are presented. Examination of the morphology of furnace slag deposited in the 100 lb/hr combustor, as well as industrial furnace, revealed reocurring crystals of iron of pyrite origin on the surface of the deposit. The cubic, octahedron and cubic/octahedron crystals are similar in size and structure to pyrite crystals occasionally found in coal. To characterize the morphology of pyrites within the coal samples of Illinois No. 5 and Lower Kittaning coals were examined using SEM and EDAX analysis. Results are presented of the types of minerals found. 10 figures, 3 tables.

• Research Organization: Foster Wheeler Development Corp., Livingston, NJ (USA)
• DOE Contract Number: AC22-81PC40268
• OSTI ID: 6777374
• Report Number(s): DOE/PC/40268-T4; ON: DE84013203
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
014000* -- Coal
Lignite
& Peat-- Combustion
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COMBUSTION
COMPARATIVE EVALUATIONS
DATA
ELECTRON MICROSCOPY
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MICROSCOPY
MINERALS
MORPHOLOGY
NUMERICAL DATA
OXIDATION
PETROGRAPHY
PYRITE
RESEARCH PROGRAMS
SCANNING ELECTRON MICROSCOPY
SLAGS
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS