Advanced physical fine coal cleaning: Microbubble flotation: Final report: Executive summary

Technical Report · Thu Sep 01 04:00:00 EDT 1988

OSTI ID:6432118

The objective was construction and operation of a 1 tph proof-of- concept (POC) microbubble flotation module to demonstrate that physical cleaning of coal could achieve: ash levels below 2 percent; energy recoveries of 80 percent; improved pyritic sulfur reduction beyond that possible with state-of-the-art technology; and moisture content of the products below 30 percent. The program demonstrated that obtaining the target objectives with microbubble flotation is primarily dependent on the nature and distribution of the mineral matter, including pyrite in the coal, and the ability to liberate the coal constituents. The use of chemicals as coal or mineral surface modifiers did not improve process performance. This does not preclude the possibility that certain coal-specific chemicals and flotation reagents may exist which could improve the performance of the process. Their effect, however, can only be of significance when all other process conditions can be controlled and fine tuned. Such conditions may exist in a commercial plant which is dedicated to process a specific coal for a long period of time to allow extensive experimentation with different chemicals. 8 figs., 2 tabs.

• Research Organization: Bechtel National, Inc., San Francisco, CA (USA)
• DOE Contract Number: AC22-85PC81205
• OSTI ID: 6432118
• Report Number(s): DOE/PC/81205-T6-Exec.Summ.; ON: TI89003924
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
ASH CONTENT
BENCH-SCALE EXPERIMENTS
CARBONACEOUS MATERIALS
CLEANING
COAL
COAL PREPARATION
COMMINUTION
DOCUMENT TYPES
ENERGY SOURCES
FLOTATION
FOSSIL FUELS
FUELS
GRINDING
MACHINING
MATERIALS
MINERALS
PROGRESS REPORT
SEPARATION PROCESSES
SULFUR CONTENT
YIELDS