Experiments of dense-phase pneumatic conveying for pulverized coal with different mean particle size were carried out on the test rig of high pressure dense-phase pneumatic conveying.The influence of total conveying differential pressure and flow rate of fluidizing gas on conveying performance of pulverized coal with different mean particle size was investigated.Also,the resistance characteristrcs of horizontal pipe and horizontal bend pipe of pulverized coal with different mean particle size were analyzed....