Continuous pilot-scale testing of column flotation for recovery of fine coal
- Kentucky Univ., Lexington, KY (USA). Center for Applied Energy Research
A series of performance studies were conducted using countercurrent column flotation to recover a marketable clean coal product from existing preparation plant fine waste streams. The test work was conducted at several preparation plant sites in Kentucky and Virginia using a 150-mm (6-in.) inside diameter column that was 5.8 m (19 ft) high. Both thickener feed and classifying cyclone overflow with a typical size distribution of 150{mu}m (100 mesh) {times} 0 were tested. The percent solids of the column flotation feed varied from 1.5% to 15% while the ash content ranged from about 30% to 60%. The concentrates produced contained 2% to 10% ash with Btu recoveries of nearly 90% using 0.12 to 1.25 kg/t (0.25 to 2.5 lbs per st) fuel oil and 0.12 kg/t (0.25 lbs per st) MIBC. These results were consistent with or better than results obtained in preliminary laboratory scale column flotation evaluation. Test results from seven different seams are discussed as well as scale-up relationships used to design a full-scale installation presently in operation.
- OSTI ID:
- 6502161
- Journal Information:
- Mining Engineering (Littleton, Colorado); (USA), Vol. 42:10; ISSN 0026-5187
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL FINES
FLOTATION
COAL PREPARATION PLANTS
DESIGN
KENTUCKY
PERFORMANCE TESTING
SCALE MODELS
VIRGINIA
FEDERAL REGION III
FEDERAL REGION IV
INDUSTRIAL PLANTS
NORTH AMERICA
SEPARATION PROCESSES
STRUCTURAL MODELS
TESTING
USA
010300* - Coal
Lignite
& Peat- Preparation- (1987-)