Reliability of using channel samples to represent run-of-mine coal washability

Technical Report · Tue Mar 01 04:00:00 EST 1983

OSTI ID:6224729

Wizzard, J T

This paper investigates the reliability of using washability data derived from channel samples to represent the washability characteristics of standard run-of-mine (ROM) coal samples. Separate samples are taken from both ROM coal and channel cut samples from identical coalbeds in a given state. These samples are subjected to identical float-sink tests; and standard coal characteristics, such as weight recovery, % ash composition, % pyritic sulfur composition, % total sulfur composition, and calorific content (Btu/lb), are measured for each float fraction. Statistical tests were performed by comparing the raw coal characteristics of the ROM and channel samples, and the coal characteristics of two sized and float-sink tested coal fractions of the ROM and channel samples. Coal samples from five different coalbeds spanning four different states are examined. The tests indicate that channel samples can be used to represent the coal characteristics of ROM coal for washed coal fractions only. Raw coal values for ash and calorific content, and the reduction values derived from tests on channel samples should not be treated as reliable representations of what would be expected from ROM samples. The raw coal comparisons indicate that the total sulfur and SO/sub 2/ emission values for the channel samples do not significantly differ from the corresponding raw coal values for the ROM samples (except for the raw SO/sub 2/ values for the Pittsburgh bed in Ohio and the raw total sulfur for the Upper Freeport bed in Pennsylvania). Therefore, channel samples can be used as estimators for determining the amount of SO/sub 2/ reduction required to comply with the EPA's New Stationary Point Source Requirements for burning coal.

• Research Organization: Department of Energy, Pittsburgh, PA (USA). Pittsburgh Energy Technology Center
• OSTI ID: 6224729
• Report Number(s): DOE/PETC/TR-83/3; ON: DE83009748
• 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
ASHES
CALORIFIC VALUE
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CLEANING
COAL
COAL DEPOSITS
COAL PREPARATION
COAL SEAMS
COMBUSTION
COMBUSTION PROPERTIES
COMMINUTION
COMPARATIVE EVALUATIONS
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FEASIBILITY STUDIES
FORECASTING
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
INFORMATION
MATERIALS
MINERAL RESOURCES
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
RESIDUES
RESOURCES
SAMPLE PREPARATION
SAMPLING
STATISTICAL DATA
SULFUR COMPOUNDS
SULFUR CONTENT
SULFUR DIOXIDE
SULFUR OXIDES
THERMOCHEMICAL PROCESSES
VARIATIONS
WASHING
YIELDS