COAL WASHING USING CHANCE CONE WITH IRON SAND MEDIA

PENCUCIAN BATUBARA MENGGUNAKAN CHANCE CONE DENGAN MEDIA PASIR BESI

Abstract

A study of coal washing was conducted by designing and creating chance cone equipment which was then continued by a process performance test using iron sand as a separator medium. The variable used for this experiment was feed coal with the size of -12.5 +5 mm; -5mm +1.68 mm; and -1.68 mm +0.85 mm, a mixer with a spinning speed of 44, 53, 72, 96, and 120 rpm, and a media relative density ( suspension of water and iron sand ) of 1.3 and 1.4. From the result of the sink–float test, the initial coal ash level of 7.91%, 5.73%, and 6.76% each was obtained. From the result of the equipment performance test, the highest efficiency was obtained at 1.4 media relative density of 69.18% at a mixer speed of 120rpm with bait size of -1,68 +0,85 mm and ash content of 6,39%.