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Title:
METHOD FOR DRY COAL PREPARATION AND APPARATUS THEREFOR
Document Type and Number:
Japanese Patent JP09040980
Kind Code:
A
Abstract:

To provide a method and apparatus for dry coal preparation which can select a raw coal having a broad particle diameter range, can remove impurities with high efficiency and, in particular, can highly efficiently remove sulfides included in a raw coal.

This dry coal preparation method is the one wherein a dryer 14a, a crusher 16, and a device 17 for removing a magnetic material serve respectively to dry and crush a raw coal 13 contg. a carbonaceous material 13a and an impurity 13b as a mixture, and remove a magnetic material. The raw coal is classified by means of a first sieve 11 to collect a raw coal fraction having a coal size of 5 to 2.5mm. The classified raw coal fraction is then separated by means of an ultrasonic selector 18 into a carbonaceous material and an impurity by taking advantage of a difference in movement, between these materials, based on a difference in specific gravity between these materials. A raw material fraction having a particle diameter of 2.5 to 1mm is selected by classification using a second sieve 12. The classified raw coal is separated by means of an electromagnetic induction selector 19 into a carbonaceous material and an impurity by taking advantage of electromagnetic force. A raw material fraction having a particle diameter of less than 1mm is separated by means of an electrostatic selector 20 into a carbonaceous material and an impurity by taking advantage of coulombic force.


Inventors:
Maruyama, Toshihiko
Kamiide, Mitsushi
Murakami, Hideo
Saito, Hiroshi
Application Number:
JP1995000189559
Publication Date:
February 10, 1997
Filing Date:
July 25, 1995
Export Citation:
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Assignee:
MARUYAMA TOSHIHIKO
KAMIIDE MITSUSHI
MURAKAMI HIDEO
SAITO HIROSHI
International Classes:
B07B15/00; B03C1/23; B03C1/24; B03C7/02; C10L5/00; C10L9/00; B07B15/00; B03C1/02; B03C7/00; C10L5/00; C10L9/00; (IPC1-7): C10L5/00; B03C1/23; B03C1/24; B03C7/02; B07B15/00