Pilot-scale testing of microbubble flotation
Fundamental investigations into the effect of bubble size on coal flotation have established that the use of microbubbles can improve the recovery of fine coal during flotation while, at the same time, increasing the rejection of ash-forming mineral matter. When used in conjunction with the quiescent conditions provided by a column, the microbubble flotation process has been demonstrated on a laboratory scale to be capable of producing superclean coal containing less than 1 or 2% ash and very little pyritic sulfur. The main objective of this project is to demonstrate the microbubble column flotation process on a pilot-scale. A 500 lb/hr pilot plant is being constructed for the purpose of: 910 demonstrating the feasibility of the microbubble flotation process for producing superclean coal, (2) collecting scale-up data for designing commercial-scale microbubble flotation columns, and (3) collecting cost data for an economic evaluation of the process. In addition to micronized coal, the process is also being tested on coarse coal and refuse pond material. 20 figs.
- 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:
- 5748409
- Report Number(s):
- DOE/PC/91274-T15; ON: DE91012262
- Country of Publication:
- United States
- Language:
- English
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Pilot-scale testing of microbubble flotation
Related Subjects
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
AERATION
BUBBLES
CARBONACEOUS MATERIALS
CLEANING
COAL
COAL FINES
COAL PREPARATION
COST
DEASHING
DOCUMENT TYPES
ECONOMIC ANALYSIS
ECONOMICS
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