Washability of trace elements in product coals from Illinois mines. Technical report, 1 March--31 May 1994

Technical Report · Thu Sep 01 04:00:00 EDT 1994

DOI:https://doi.org/10.2172/10183114· OSTI ID:10183114

Demir, I; Ruch, R R; Harvey, R D; Steele, J D; Khan, S

Existing washability data on trace elements in Illinois coals were generated using float-sink methods, which are not applicable to modern froth flotation or column flotation processes. Particularly, there is a lack of washability data on product (as-shipped) coals from modern preparation plants. The goal of this project is to provide the needed trace element washability (release analysis) data on as-shipped Illinois coals using a froth flotation/release analysis (FF/RA) procedure. The results generated by this project will promote industrial utilization of Illinois coals and help assess the effect of new environmental requirements on the use of these coals in utility steam generation. During the third quarter, preparation and submission of all samples for chemical analysis were completed. Analyses of the samples produced by cleaning 34 as-shipped coals using FF/RA were completed for ash, moisture, S, heating value (BTU), and F, and some for Mn and oxide composition. The rest of the analytical work is in progress. The analytical data are being used to evaluate removal of ash, S, and trace elements from the as-shipped coals at the chosen flotation conditions and particles sizes. Available data on the FF/RA of five as-shipped coals at {minus}100, {minus}200, {minus}400 mesh sizes indicate that ash and F rejections increase with decreasing particle size. For the {minus}400 mesh tests, 70--90% of the ash and 35--74% of F were rejected at a BTU or combustibles recovery of 80%. One of the as-shipped coals was previously subjected to FF/RA tests at {minus}100 and {minus}400 mesh sizes to investigate mass balances achievable for the procedure. Preliminary results on ash and F contents of complete set of flotation products from the two tests indicate a mass balance of 95 to 100%.

• Research Organization: Illinois State Geological Survey, Champaign, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FC22-92PC92521
• OSTI ID: 10183114
• Report Number(s): DOE/PC/92521--T167; ON: DE94018869; BR: AV0100000/AV0102000
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300
ANTIMONY
ARSENIC
ASH CONTENT
BERYLLIUM
BITUMINOUS COAL
BORON
CADMIUM
CALORIFIC VALUE
CHEMICAL COMPOSITION
CHLORINE
CHROMIUM
COAL PREPARATION
COBALT
COPPER
DEASHING
DEMETALLIZATION
DESULFURIZATION
EXPERIMENTAL DATA
FLOTATION
FLUORINE
ILLINOIS BASIN
LEAD
LITHIUM
MANGANESE
MERCURY
MOLYBDENUM
NICKEL
OXIDES
PREPARATION
PROGRESS REPORT
SELENIUM
SULFUR CONTENT
THORIUM
TRACE AMOUNTS
URANIUM
VANADIUM
ZINC