Coal Beneficiation for Clean Coal Technology

1. Coal Beneficiation for Clean Coal Technology Dr Kalyan Sen Director Central Fuel Research Institute Dhanbad 828108

2. Figure: Particle Size distribution for Indian coals PSD of Indian Non Coking Coals

5. Indian Coal as feed to TPS Favourable qualities: • Huge reserve • Low S content ( <0.6%) • High AFT (>1100oC) • Low Iron content • Low Chlorine content • Low toxic trace elements • Reactive inertinites back

10. DSC/TG of Density Fractions

11. Maximum Rate Vs Ch. Ash

12. DTG Peak Temperature Vs Ch. Ash

15. STRATEGY FOR ACHIEVING COAL BASED POWER TARGET Improved Coal Quality • Mine planning • Assessment • Cleaning • Blending Advance Technology • Larger Units • CCT R & M National Programme

16. Ash% reducn M % over ROM coal Level Scheme Methodology Cleans (%) I Dry benefin. Separation of stone/shale based on differential breakage potentiality 3-4 >90 Nil II Crushing, screening & coarse coal cleaning Coarse coal (13/30mm) washed & mixed with untreated fines; dewatering screens. <10 70-90 2-3% >10 <60 3-4% III Crushing, screening and total cleaning Coarser fraction washed at optimum efficiency levels: fine coal by Spiral: dewatering Technology Routes for beneficiation back

17. Raw coal ash 37.0% Level I I (HM) Rotary Breaker Level III (HM) Level I I (JIG) Level III (JIG) Achievable yield of washed coal by different level of beneficiation Yield of Cleans,% 100 95 90 85 80 75 70 65 60 24 25 26 27 28 29 30 31 32 33 34 35 36 37 back Ash, %

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