GRANULATION OF LOW-GRADE COAL

PURPOSE:To obtain oil-containing deashed coal granules which can be dehydrated easily with a screen and has water-absorption preventing property, by making the surface of coal powder during the drying process, slurrying the powder in water, and granulating in water using an oily substance as a binde...

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Bibliographische Detailangaben
Hauptverfasser: YOSHII NOBUO, FUJITA JINSHIROU
Format: Patent
Sprache:eng
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Zusammenfassung:PURPOSE:To obtain oil-containing deashed coal granules which can be dehydrated easily with a screen and has water-absorption preventing property, by making the surface of coal powder during the drying process, slurrying the powder in water, and granulating in water using an oily substance as a binder. CONSTITUTION:The surface of coal powder, e.g. brown coal powder, is made oleophilic during drying process by adding and mixing a solution of thermosetting resin to the coal and curing the resin with heat. After the treatment, the powder is slurried in water, granulated in water using an oily substance as a binder, and separated from water to obtain oil-containing deashed coal granules having a diameter of about 0.5-1.5mm.. EFFECT:The spontaneous ignition and the dust generation are prevented.