(Recovery of coal fines from preparation plant effluents)

Technical Report · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5792336

Choudhry, V ^[1]; Khan, L ^[2]; Yang, D ^[3]

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1. Praxis Engineers, Inc., Milpitas, CA (USA)
2. Illinois State Geological Survey, Champaign, IL (USA)
3. Michigan Technological Univ., Houghton, MI (USA)

The objectives of this project are to test and demonstrate the feasibility of recovering coal fines which are currently disposed of with plant effluent streams, in order to produce a fine clean coal product. This product can then be blended with the coarse clean coal from the preparation plant. Recovery of coal from the effluent stream samples will be effected by means of Michigan Technological University's static tube flotation process. This process has been successfully demonstrated on a number of raw coals to reject 85% of the pyritic sulfur and recover 90% of the combustible matter. The process parameters will be modified so that this technology can be applied to preparation plant effluents in order to recover a low-ash, low-sulfur clean coal that is, at a minimum, compatible with the quality of the clean coal currently produced from the preparation plant. The main activities during this period were setting up the static tube test unit to conduct the experimental work as outlined in the project work plan. The first of four effluent slurry samples collected from four operating Illinois preparation plants was tested at Michigan Technological University. The first batch of tests resulted in a clean coal containing 7.5% ash at 94.5% combustible matter recovery. Another test aimed at lowering the ash further analyzed at 3.0% ash and 0.92% total sulfur. In addition, analyses of particle size distribution and sink-float testing of the +200 mesh material were undertaken as a part of the effluent characterization work. 5 tabs.

• Research Organization: Illinois Dept. of Energy and Natural Resources, Springfield, IL (USA)
• Sponsoring Organization: DOE; ILDENR; USDOE, Washington, DC (USA); Illinois Dept. of Energy and Natural Resources, Springfield, IL (USA)
• DOE Contract Number: FG22-90PC90176
• OSTI ID: 5792336
• Report Number(s): DOE/PC/90176-T31; ON: DE91014043
• Country of Publication: United States
• Language: English

Related Subjects

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