Cleaning Kentucky No. 9 Seam coal for SO/sub 2/ compliance and using fly ash-derived magnetite for coal cleaning, Coal Quality Development Center: Campaign Report No. 7: Interim report

Technical Report · Tue Dec 01 04:00:00 EST 1987

OSTI ID:5702850

Suardini, P J; Torak, E R; Bhowmick, A K; Cavalet, J R

This report presents the results from two studies: the first a comprehensive investigation conducted at EPRI's Coal Quality Development Center to determine if physically cleaning Kentucky No. 9 Seam coal is an effective method for meeting SO/sub 2/ emission control requirements and reducing power plant capital and operating costs, and the second an investigation into substituting fly-ash-derived magnetite for natural magnetite in commercial heavy-media coal cleaning circuits. Results of the first study show that cleaning reduced the Kentucky No. 9 Seam raw coal's SO/sub 2/ emission and ash loading potentials by 36 and 47%, respectively, while retaining 88% of the coal's heating value. Extensive bench- and pilot-scale combustion tests performed under EPRI Project 2425-1 by Combustion Engineering and Babcock and Wilcox on the raw and two CQDC-produced clean coals (one medium-cleaned, the other deep-cleaned) reveal that commercial power plant performance would be improved considerably by burning the clean coals. The Tennessee Valley Authority (TVA) and EPRI, the test sponsors, also concluded through economic analyses that incorporating medium-depth coal cleaning into various SO/sub 2/ emission control strategies can greatly reduce power plant and flue-gas desulfurization system capital and operating costs. The second study used laboratory and commercial-scale test results to compare the quality and cleaning performance of three types of magnetite: natural magnetite, magnetite derived from TVA's power plant fly ash, and commercial fly-ash-derived magnetite. A second focus of this study was to determine the extent to which each type of magnetite can be recovered and reused. The results reveal that fly-ash-derived magnetites perform well in commercial heavy-media circuits, but are difficult to recover. 8 refs., 29 figs., 41 tabs.

• Research Organization: Kaiser (Raymond) Engineers, Inc., Homer City, PA (USA). Homer City Office; Science Applications International Corp., Homer City, PA (USA). Homer City Office
• OSTI ID: 5702850
• Report Number(s): EPRI-CS-5422; ON: TI88920140
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
010600 -- Coal
Lignite
& Peat-- Properties & Composition
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
014000 -- Coal
Lignite
& Peat-- Combustion
015000 -- Coal
Lignite
& Peat-- Economic
Industrial
& Business Aspects
29 ENERGY PLANNING, POLICY, AND ECONOMY
290300 -- Energy Planning & Policy-- Environment
Health
& Safety
AEROSOL WASTES
ASH CONTENT
ASHES
BENCH-SCALE EXPERIMENTS
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
CLEANING
COAL
COAL DEPOSITS
COAL PREPARATION
COAL SEAMS
COMBUSTION PROPERTIES
COST
DESULFURIZATION
ECONOMIC ANALYSIS
ECONOMICS
ENERGY SOURCES
EVALUATION
FEDERAL REGION IV
FLOTATION
FLUE GAS
FLY ASH
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FOULING
FUELS
GASEOUS WASTES
GEOLOGIC DEPOSITS
HEAVY MEDIA SEPARATION
IMPURITIES
IRON COMPOUNDS
IRON ORES
IRON OXIDES
KENTUCKY
MAGNETITE
MATERIALS
MINERAL RESOURCES
MINERALS
NORTH AMERICA
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POWER PLANTS
REGULATIONS
RESIDUES
RESOURCES
SEPARATION PROCESSES
SLAGS
SULFUR COMPOUNDS
SULFUR CONTENT
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS
USA
WASHING
WASTE PRODUCT UTILIZATION
WASTES