Coal preparation for combustion and conversion. Final report
This report stresses topics of particular interest to the electric utility industry. It covers the full scope of coal processing, from mine face to post-combustion stack gas clean-up, and provides essential information for assessing the potential contribution of physical (as opposed to chemical) coal beneficiation to a utility's fuel procurement and utilization strategy. A methodology is presented for quantifying direct costs corresponding to six different levels of preparation, ranging from mere rubbish removal from ROM coals to intensive beneficiation of crushed and sized coals in prepared media. Fixed and variable costs, including those representing Btu's lost with washing plant rejects, are tabulated for six preparation levels. Major factors influencing preparation costs are examined and the point made that such costs cannot be forecast without a detailed study of each potential application. This applies equally to estimates of quality improvements achievable and economically justifiable with a particular coal. The blending of low and medium sulfur coals is shown to be an alternative for meeting SO2 standards in some cases, but the reader is cautioned that coals after blending may exhibit disproportionately lower ash fusion temperatures. The effects on power plant operation from burning beneficiated coals are discussed, particularly as they bear on a coal's grindability, its combustion characteristics such as fouling and slagging, and on flue gas treatment systems. Coal transportation costs are investigated on a nationwide basis and impacts of financial and environmental constraints on the coal preparation industry discussed. The report leads to the conclusion that the moderate costs of coal beneficiation are often more than offset by the benefits and savings generated by this practical and proven technology.
- Research Organization:
- Gibbs and Hill, Inc., New York (USA)
- OSTI ID:
- 6873862
- Report Number(s):
- EPRI-AF-791
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ASHES
MELTING
BOILERS
FOULING
COAL
MIXING
TRANSPORT
COAL PREPARATION PLANTS
ENVIRONMENTAL EFFECTS
EQUIPMENT
MINERAL WASTES
FOSSIL-FUEL POWER PLANTS
COAL PREPARATION
PYRITE
REMOVAL
SLAGS
CHEMICAL COMPOSITION
VISCOSITY
AIR POLLUTION ABATEMENT
BARGES
CLEAN AIR ACT
COAL GASIFICATION
COAL LIQUEFACTION
CYCLONE SEPARATORS
DESIGN
DESULFURIZATION
ECONOMICS
ELECTROSTATIC PRECIPITATORS
ELEMENTS
EMISSION
FLOTATION
JIGS
MATERIALS HANDLING
NOISE POLLUTION
PHYSICAL PROPERTIES
POLLUTION REGULATIONS
RAILWAYS
REVIEWS
SCREENS
SLURRY PIPELINES
STORAGE
TABLES
TEMPERATURE DEPENDENCE
TRACE AMOUNTS
WASHING
WASTE DISPOSAL
WATER POLLUTION CONTROL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
CLEANING
COMMINUTION
CONCENTRATORS
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FREIGHT PIPELINES
FUELS
GASIFICATION
INDUSTRIAL PLANTS
INERTIAL SEPARATORS
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
LAWS
LIQUEFACTION
MANAGEMENT
MINERALS
ORES
PHASE TRANSFORMATIONS
PIPELINES
POLLUTION
POLLUTION ABATEMENT
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POLLUTION LAWS
POWER PLANTS
PYRITES
REGULATIONS
RESIDUES
SEPARATION PROCESSES
SOLID WASTES
SULFIDES
SULFUR COMPOUNDS
SULFUR ORES
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS
WASTE MANAGEMENT
WASTES
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage
010402 - Coal
Lignite
& Peat- Purification & Upgrading