A newly-developed coal jig

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:324827

Jing, Liu ^[1]

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1. Coal Preparation Research Inst., Tangshan (China)

The raw coal feed of a coal washery usually varies widely in size range. According to the principle for obtaining the maximum clean coal yield, each size fraction requires a different separating density for efficient separation, and the finer the size the higher the separating density. This principle should also be applicable to jigging separation. As evidenced by numerous field data, a much better separation performance may be obtained in treating sized coal instead of unsized coal. In the classical unsized jigging separation two jigs are used for separately treating the coarse and the small coal with complicated separation circuits. In 1991 a combined SKT F jig for separating the coarse coal on the left side and the small coal on the right side was successfully developed in China. Industrial tests and field applications have all met with great success. A general description is made in the paper of the theory applied for the design of the jig and the study on the following aspects: mechanical structure and features of the jig body, air valves, discharging mechanism and screenplate layout, and operating principle of the numerically-controlled air valves. Reference is made finally to the results of industrial tests and field applications, as well as the technological level of the SKT F jig in use.

• OSTI ID: 324827
• Report Number(s): CONF-970931--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
COAL PREPARATION
DESIGN
JIGS
OPERATION
PARTICLE SIZE
PERFORMANCE