Recovery of fine coal from waste streams using advanced column flotation
The overall objective of this program is to evaluate the application of an advanced physical separation technique, namely Ken-Flote column flotation to maximize BTU recovery with minimum product sulfur and ash content 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 pyrite. During this contract period, samples were obtained from the Kerr-McGee Galatia Preparation Plant and characterized. Analysis of the flotation feed slurry indicate that a significant amount of pyrite is present in the 5 microns size range as free particles. The coal is hydrophobic in nature and optimum reagent addition is 0.75 lb/ton frother and 1.5 lb/ton fuel oil. The best flotation results were obtained near pH 6 for all frothers tested. Two ash depressants tested showed no significant improvement in ash rejection. A pyrite depressant was also tested which indicated improved pyrite rejection from 28 to 37 percent at a dosage of 5 lb/ton. Efforts are in progress to design a test matrix to determine optimum operating conditions for column flotation testing with this substrate. The test matrixes will be designed to investigate three different bubble generating mechanisms. The objective is to identify column operating variables that will provide maximum combustible recovery, minimum product ash and maximum pyrite rejection. 10 figs., 1 tab.
- Research Organization:
- Kentucky Univ., Lexington, KY (USA). Center for Applied Energy Research
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG22-90PC90176
- OSTI ID:
- 5925497
- Report Number(s):
- DOE/PC/90176-T4; ON: DE91010503
- Country of Publication:
- United States
- Language:
- English
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Recovery of fine coal from waste streams using advanced column flotation
Recovery of fine coal from waste streams using advanced column flotation
Related Subjects
BITUMINOUS COAL
MATERIALS RECOVERY
TAILINGS
FLOTATION
ADDITIVES
ASH CONTENT
BUBBLES
CALORIFIC VALUE
CHEMICAL ANALYSIS
COAL FINES
COAL PREPARATION
OPERATION
OPTIMIZATION
PARTICLE SIZE
PH VALUE
PROGRESS REPORT
PYRITE
REAGENTS
SEPARATION EQUIPMENT
SULFUR CONTENT
WETTABILITY
BLACK COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COMBUSTION PROPERTIES
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
MANAGEMENT
MATERIALS
MINERALS
PROCESSING
RECOVERY
SEPARATION PROCESSES
SIZE
SOLID WASTES
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING
WASTES
010800* - Coal
Lignite
& Peat- Waste Management