Recovery of fine coal from waste streams using advanced column flotation

Technical Report · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5438691

Groppo, J G; Parekh, B K ^[1]

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1. Kentucky Univ., Lexington, KY (United States). Center for Applied Energy Research

The overall objective of this program is to evaluate the application of an advanced physical separation technique, namely Ken-Flote'' column flotation to recover clean coal with minimum sulfur and ash content at greater than 90 percent combustible recovery from two Illinois coal preparation plant fine waste streams. The project will optimize various operating parameters with particular emphasis on fine bubble generating devices and reagent packages to enhance the rejection of liberated ash and pyritic sulfur. During this contract period, column flotation testing was completed on the flotation feed slurry obtained from the Kerr-McGee Galatia Preparation Plant. The column flotation tests were conducted using three different bubble generating devices: Static, gas saver and foam jet spargers. Each of these devices was tested with three different frothers and various column operating variables to provide maximum combustible recovery, minimum product ash and maximum pyrite rejection. In general, the column flotation provided a clean coal containing about 4--6 percent ash at combustible recovery ranging from 88 to 92 percent while pyrite rejection was 70 to 75 percent. Flotation tests were also conducted on a slurry sample obtained from The Ziegler {number sign}26 Preparation Plant in Sesse, Illinois. Base-line flotation testing was completed using batch flotation to identify optimum reagent addition. Column flotation of the Ziegler slurry provided a clean coal containing 4--6 percent ash with a combustible recovery of 90--95 percent and pyrite rejection of 60--67 percent. Efforts are in progress in installing a 6-inc. I.D. pilot column at the Ziegler {number sign}26. 9 figs.

• Research Organization: Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-90PC90176
• OSTI ID: 5438691
• Report Number(s): DOE/PC/90176-T46; ON: DE91018310
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL FINES
MATERIALS RECOVERY
COAL PREPARATION PLANTS
WASTE MANAGEMENT
AERATION
ASH CONTENT
FLOTATION
FUEL SLURRIES
PROGRESS REPORT
SULFUR CONTENT
WASTE WATER
DISPERSIONS
DOCUMENT TYPES
FUELS
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
LIQUID WASTES
MANAGEMENT
MIXTURES
OXYGEN COMPOUNDS
PROCESSING
RECOVERY
SEPARATION PROCESSES
SLURRIES
SUSPENSIONS
WASTE PROCESSING
WASTES
WATER
010300* - Coal
Lignite
& Peat- Preparation- (1987-)
010800 - Coal
Lignite
& Peat- Waste Management