... /kg) of low volatile fuel, not only good coal available, and especially other boiler can not burn discarded gangue, oil shale, the ... /kg (1500 ~ 2500cal/kg) oil shale, coal, coal gangue, bituminous and anthracite blended layer burning boiler slag unburned. 2, the furnace unit sectional ... not easy or bonded, to facilitate the comprehensive utilization. Pulverized coal boiler