As a coal sort with bad slurrization performance

the shenhua coal used in Wushashan power plant has been pretreated by pyrolysis in a muffle under nitrogen protection to improve the slurrization performance of said coal sort.The surface appearance and pore structure of pretreated and original coal samples have been detected by using Autosorb-1-c physisorption instrument

and their slurrization performance being analysed by using HAAKE VT550 viscometer.Results show that the Mad and Oad decreased by a big margin.Comparing with the original coal samples

the slurrization peformance of pretreated coal samples has been greatly enhanced.Especially the coal samples pretreated at 450 ℃ during 0.5 h

under condition of their concentration to be enhanced by 1.85%

the apparent viscosity has been reduced by 364 mPa·S.