Coal preparation in China

Journal Article · Sun Mar 01 04:00:00 EST 1981 · World Coal; (United States)

OSTI ID:6219252

Zhao-Ning, C

There have been 22 dense medium coal preparation plants built in China since 1963. These were built to eliminate the need to separate coarse coal by hand-picking and to make sharper separations in the preparation plants treating coking coal. Generally 1.6 to 4.6-meter (5.28 to 15.18-foot) diameter inclined or vertical-wheel dense medium separators are used to treat coal sizes from 13 to 300 millimeters (0.5 to 12 inches) and 0.5 to 0.6-meter (1.65 to 2-foot) diameter inclined dense medium cyclones are used to treat coal sizes from 0.5 to 13 millimeters (0.02 to 0.5 inch). Experience in China has shown that the results of dense medium separation techniques are better than other coal cleaning processes. Capital investment for such plants, however, is usually 20 to 40 percent higher and operating costs are 60 to 80 percent greater than a similar jig plant. As a result, most of the new preparation plants to be built in China will use jigs and froth flotation. With the steady growth of face mechanization, the proportion of fines in run-of-mine coal has increased. These fines can be as high as 20 to 25 percent of plant feed. Froth flotation is the most common practice for cleaning fines in China. The first froth flotation plant was installed in the Didao preparation plant, Heilongjiang province, in 1954, and there has been a total of 80 froth flotation plants built in China since that time.

• Research Organization: Coal Preparation Design and Research Inst., Pingdingshan, China
• OSTI ID: 6219252
• Journal Information: World Coal; (United States), Journal Name: World Coal; (United States) Vol. 7:3; ISSN WOCOD
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ASIA
CHEMICAL REACTIONS
CHINA
COAL PREPARATION
COAL PREPARATION PLANTS
COMBUSTION
COMMINUTION
CONCENTRATORS
CYCLONE SEPARATORS
DATA
EQUIPMENT
FLOTATION
FLUIDIZED-BED COMBUSTION
HEAVY MEDIA SEPARATION
INDUSTRIAL PLANTS
INERTIAL SEPARATORS
INFORMATION
JIGS
MINERAL WASTES
NUMERICAL DATA
OXIDATION
POLLUTION CONTROL EQUIPMENT
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SOLID WASTES
THERMOCHEMICAL PROCESSES
WASTES