Analyses of the Northern Great Plains Province lignites and subbituminous coals and their ash

Technical Report · Wed Jul 01 04:00:00 EDT 1981

OSTI ID:6263229

Cooley, S A; Ellman, R C

This compilation of analyses of North Dakota and Montana low-rank coals (lignites and subbituminous coals) and of their ash extends the data base for these coals and should prove useful to present and potential coal users. Samples both from exploratory core drilling and from auger-drilling at operating mines were evaluated to obtain a wider distribution of data. Averages and standard deviations were calculated for North Dakota and Montana mines, and correlations were investigated for east-west locations depending on geographic ranges. Highest variability for both coals was in moisture and ash contents, with moisture- and ash-free analyses being relatively uniform for each. Composition of ash exhibited wide variability, especially in sodium and calcium contents. Sulfur contents were quite variable, but the average content was usually low. Within-mine variability was usually similar to that between mines. In the eastern Montana transitional area between lignite and subbituminous coals, special precautions in sampling are required to permit accurate classification from analyses. Despite care in selection of representative cores, core samples were indicated to be less uniform in analyses than auger-drilled samples obtained from the same mine.

• Research Organization: Department of Energy, Grand Forks, ND (USA). Grand Forks Energy Technology Center
• OSTI ID: 6263229
• Report Number(s): DOE/GFETC/RI-81/2; ON: DE81028366
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ASHES
BROWN COAL
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
COAL
COAL DEPOSITS
DATA
DATA COMPILATION
DRILL CORES
ELEMENTS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
INFORMATION
IRON COMPOUNDS
IRON OXIDES
LIGNITE
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MATERIALS
MATTER
MINERAL RESOURCES
MOISTURE
MONTANA
NONMETALS
NORTH AMERICA
NORTH DAKOTA
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHOSPHORUS OXIDES
POTASSIUM COMPOUNDS
POTASSIUM OXIDES
QUANTITY RATIO
RESIDUES
RESOURCES
ROCKY MOUNTAIN REGION
SAMPLING
SILICON COMPOUNDS
SILICON OXIDES
SODIUM COMPOUNDS
SODIUM OXIDES
SUBBITUMINOUS COAL
SULFUR
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
USA
VARIATIONS
VOLATILE MATTER