Indian coal challenges current coal preparation technology

Journal Article · Sat May 01 04:00:00 EDT 1982 · World Coal; (United States)

OSTI ID:5009177

Bose, S K

India's coal presents the coal preparation engineer with very difficult coal cleaning challenges. Many troublesome washability characteristics arising out of the intermixing of shale in coal have necessitated the development of complex coal washing schemes, finer crushing of raw coal feeds, and a high proportion of middlings production. Indeed, the bulk of India's coking coal has about the same characteristics as those of normal middlings found in European or North American coal. A number of coal preparation plants in India have yield ratios of clean coal, middlings, and rejects of 50 to 40 to 10. This high proportion of middlings creates many problems, particularly with regard to storage and utilization. Five new coking coal preparation plants are being built at Moonidih, Barora, Mohuda, Ramgarh, and Dedla. Throughput for each will be from 480,000 to 3,000,000 tons per year. In addition, another 15 coking coal preparation plants are now being expanded or remodeled. In 10 years, total capacity of coking coal preparation plants will be doubled. It is estimated that by the end of the century, preparation plant capacity will be four times current capacity. This expansion is needed as raw coal quality is expected to fall in the future. Grinding is required for coal that is very difficult to clean. This often requires initial coal preparation by jigs, then rewashing of finely-crushed middlings in oil agglomeration. The easy dewatering characteristics make it pumpable and easily transportable in pipelines.

• OSTI ID: 5009177
• Journal Information: World Coal; (United States), Journal Name: World Coal; (United States) Vol. 8:3; ISSN WOCOD
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
AGGLOMERATION
ASHES
ASIA
CAPACITY
COAL DEPOSITS
COAL PREPARATION
COAL PREPARATION PLANTS
COMMINUTION
CONCENTRATORS
CONSTRUCTION
CYCLONE SEPARATORS
DATA
DESIGN
DEVELOPING COUNTRIES
EQUIPMENT
FLOTATION
GEOLOGIC DEPOSITS
HEAVY MEDIA SEPARATION
INDIA
INDUSTRIAL PLANTS
INERTIAL SEPARATORS
INFORMATION
JIGS
MAPS
MINERAL RESOURCES
MOISTURE
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
POLLUTION CONTROL EQUIPMENT
RESIDUES
RESOURCES
SEPARATION EQUIPMENT
SEPARATION PROCESSES