PDU-scale testing of microbubble flotation
Work during this past quarter focused primarily on Tasks 1.2.5 (Coarse Coal Flotation) and 1.2.7 (Refuse Pond Flotation). The performance comparison between microbubble column flotation and conventional flotation was continued using minus-28-mesh Pittsburgh No. 8 seam coal. For an equivalent recovery, the microbubble column reduced the final ash content of the product by more than 25% over that obtained using conventional flotation. It was found that the 14-inch diameter microbubble column could produce a 4.5% ash product from a 11% ash feed with combustible recoveries in excess of 95% at a feed rate of 300 lb/hr. In addition, flotation tests were conducted on a minus-325-mesh, high-ash (45--50%) classifying cyclone overflow stream in order to study the feasibility of the microbubble process for producing a clean coal product from what is normally considered refuse material. Results indicate that the column is capable of reducing the ash content to a range of 4.5 to 11% with corresponding combustible recoveries of 57 to 85%, respectively. 4 figs., 3 tabs.
- Research Organization:
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (USA). Dept. of Mining and Minerals Engineering
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC22-86PC91274
- OSTI ID:
- 5902564
- Report Number(s):
- DOE/PC/91274-T4; ON: DE91012250
- Country of Publication:
- United States
- Language:
- English
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PDU-scale testing of microbubble flotation
PDU-scale testing of microbubble flotation
Related Subjects
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
AERATION
BUBBLES
CARBONACEOUS MATERIALS
CLEANING
COAL
COAL FINES
COAL PREPARATION
DEASHING
DOCUMENT TYPES
ENERGY SOURCES
FLOTATION
FLOW RATE
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
HYDROGEN COMPOUNDS
LIQUID WASTES
MATERIALS
OXYGEN COMPOUNDS
PILOT PLANTS
PROGRESS REPORT
SEPARATION EQUIPMENT
SEPARATION PROCESSES
WASHING
WASTE WATER
WASTES
WATER