Advances in preparation

Journal Article · Sat Nov 01 04:00:00 EST 1980 · World Coal; (United States)

OSTI ID:6686896

Zimmerman, R E

The demand for coal preparation will grow along with increases in production due to the following: (1) depletion of higher quality coal seams; (2) mechanized mining which increases impurities in run-of-mine (ROM) coal; (3) high cost of transportation, which makes it uneconomical to transport inert material; (4) market demands for higher quality coal; (5) environmental requirements in regard to minimizing pollution; (6) obsolescence of existing plants and processes; and (7) higher mine costs, which make it imperative to improve coal washing techniques for optimized recovery. Preparation plants today range from 2000 to 2000-ton-per-hour capacity central cleaning plants to small plants with capacities as low as 70 to 100 tons per hour. A coal preparation plant may be a simple crushing and screening operation or a highly sophisticated processing operation which uses chemical treatment and other methods. In the United States, for example, excluding the simple crushing and screening operations, about 40 percent of coal tonnage is treated by jigs. Heavy media systems account for 32 percent, tables account for 11.5 percent, froth flotation 5 percent, and other methods 3.5 percent. In the United Kingdom, some 60 percent of the coal is cleaned by jigs, 25 percent by heavy media methods, and 9 percent by other methods, including froth flotation. In other parts of Europe, some 60 percent of coal treatment is by jigs and this figure most certainly holds true for Communist countries, including the Soviet Union. In Australia, about 45 percent of the coal is cleaned by jigs.

• OSTI ID: 6686896
• Journal Information: World Coal; (United States), Journal Name: World Coal; (United States) Vol. 6:11; ISSN WOCOD
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
AGGLOMERATION
CLEANING
COAL FINES
COAL PREPARATION
COAL PREPARATION PLANTS
COMMINUTION
CONCENTRATORS
CONTROL SYSTEMS
CYCLONE SEPARATORS
DESIGN
ENVIRONMENTAL EFFECTS
EQUIPMENT
FLOTATION
FUEL OILS
FUELS
HEAVY MEDIA SEPARATION
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
INERTIAL SEPARATORS
JIGS
LIQUID FUELS
LIQUID WASTES
MEASURING INSTRUMENTS
NOISE POLLUTION CONTROL
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
PURIFICATION
REMOVAL
SEPARATION PROCESSES
TABLES
TRANSPORT
WASHING
WASTE WATER
WASTES
WATER
WATER REMOVAL
WEIGHT INDICATORS