Engineering Development of Advanced Physical Fine Coal Cleaning for Premium Fuel Applications

Technical Report · Fri Sep 26 04:00:00 EDT 1997

DOI:https://doi.org/10.2172/2242· OSTI ID:2242

Smit, Frank J ^[1]; Schields, Gene L; Jha, Mehesh C; Moro, Nick

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1. Federal Energy Technology Center

The ash in six common bituminous coals, Taggart, Winifrede, Elkhorn No. 3, Indiana VII, Sunnyside and Hiawatha, could be liberated by fine grinding to allow preparation of clean coal meeting premium fuel specifications (< 1- 2 lb/ MBtu ash and <0.6 lb/ MBtu sulfur) by laboratory and bench- scale column flotation or selective agglomeration. Over 2,100 tons of coal were cleaned in the PDU at feed rates between 2,500 and 6,000 lb/ h by Microcel™ column flotation and by selective agglomeration using recycled heptane as the bridging liquid. Parametric testing of each process and 72- hr productions runs were completed on each of the three test coals. The following results were achieved after optimization of the operating parameters: The primary objective was to develop the design base for commercial fine coal cleaning facilities for producing ultra- clean coals which can be converted into coal-water slurry premium fuel. The coal cleaning technologies to be developed were advanced column flotation and selective agglomeration, and the goal was to produce fuel meeting the following specifications.

• Research Organization: Federal Energy Technology Center, Morgantown, WV, and Pittsburgh, PA
• Sponsoring Organization: USDOE
• DOE Contract Number: AC22-92PC92208
• OSTI ID: 2242
• Report Number(s): DE-AC22-92PC92208--23; ON: DE00002242
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
Cleaning
Coal
Flotation