Effect of demineralization on the ignition of brown coal by millisecond laser pulses
B. P. ADUEV1, E. G. GAZENAUR2, A. YU. MITROFANOV1, D. R. NURMUKHAMETOV1,2
1The Federal Research Center of Coal and Coal Chemistry, Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russia
2Kemerovo State University, Kemerovo, Russia
Keywords: laser radiation, coal, ignition, combustion, glow kinetics
Abstract
Laser ignition of brown coal samples (rank 2B, Kaychaksky open pit) with rectangular 1-10 ms pulses of the quasi-continuous ytterbium laser YLR-150/1500-QCW-MM-AC (1070 nm, 1.6 kW) has been investigated before and after coal demineralisation. Coal demineralisation is demonstrated to cause an increase in the energy density necessary for ignition.
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