Studies on Washability Characteristics of Low-Volatile Indian Coking Coal by Differential Crushing

The effect of differential crushing on liberation characteristics has been studied for a low volatile coking coal Indian origin through washability studies. Two parameters, namely “Index Washability” (IW) and “Near Gravity Material Index” (NGMI), are used to describe the ease washability. ROM Coal is crushed four different top sizes namely, 75mm, 25mm, 13mm 6mm.On basis calculated IW it observed that relative increases with decrease in size. From values may be said this can economically beneficiated using gravity process after -6mm NGMI values, critical specific gravities have estimated -75 mm, -25mm, -13mm -6 mm 1.65, 1.68, 1.53 1.58 respectively. These suggest separation at range most difficult task methods. analysis, coals -25 & identical (≈ 0.18) 17% clean ash content. This suggests similar degree difficulty, produced from these two sizes. In order increase yield ash, decision blending size need taken.